TechnicalReference_Dems

MICROSAR Diagnostic Event Manager
(Dem)
Technical Reference

Version 7.6.1

Authors
Thomas Dedler, Alexander Ditte, Matthias Heil, Anna Bosch, Erik Jeglorz,
Stefan Hübner, Aswin Vijayamohanan Nair, Savas Ates
Status
Released

Technical Reference MICROSAR Diagnostic Event Manager (Dem)
Document Information
History
Author
Date
Version  Remarks
A. Ditte
2012-05-04  1.0.0
>  Initial Version
A. Ditte
2012-10-09  1.0.1
>  Add chapter 6.2.6.20 and 6.6.1.2.11
>  Add GetEventEnableCondition to chapter 6.6.1.1.2
M. Heil
2012-11-02
1.1.0
>  Architecture Update
A. Ditte,
2013-02-15  1.2.0
>  Introduced Measurement and Calibration (chapter 5)
M. Heil
>  Extended chapters 3.4, 3.6, 3.16, 4.3 and 4.3.1
>  Added User Controlled WarningIndicatorRequest
(chapter 3.17.1)
>  Added chapters 6.2.6.24, 6.2.6.25, 6.6.1.1.9
M. Heil
2013-04-05  1.3.0
>  Support for feature ‘DTC suppression’
>  Added chapter 3.10, APIs 6.2.6.26
>  Reworked table layout in chapters 4.3, 5.2
>  Reworked Measurement and Calibration (chapter 5)
>  Added measurable items (chapter 5.1)
M. Heil
2013-06-17  1.4.0
>  Added combined events
>  Reworked suppression
T. Dedler
2013-07-22  1.4.1
>  critical section description extended
T. Dedler,   2013-09-04  2.0.0
>  Service ID definition changed
M. Heil
>  Post-Build Loadable
A. Ditte
2013-11-05
2.1.0
>  Added OBD DTC and Root cause EventId to chapter
3.11.2
>  Added limitation for internal data elements in chapter
8.3
A. Ditte,
2014-01-14  3.0.0
>  Added J1939 (chapters 3.20, 6.2.9)
M. Heil
>  Adapted DCM interfaces (chapter 6.2.8) according
AUTOSAR 4.1.2
>  Added chapter 4.3.1
>  Fixed ESCAN00071673: NvM configuration is not
described
>  Fixed ESCAN00071511: Missing hint for supported
feature 'individual post-build loadable'
>  Fixed ESCAN00073677: Incorrect figure for DEM
initialization states
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
M. Heil
2014-03-27  3.1.0
>  Describe deviation in handling operation cycles before
module initialization.
>  Add dependency to configuration to Dcm APIs.
>  Added warning about time-based de-bouncing and
maximum fault detection counter in current cycle
M. Heil
2014-05-08  3.2.0
>  Added Event Availability (chapters 3.10.1, 6.2.6.27)
>  Added freeze frame pre-storage (chapters 3.12, 6.2.6.4,
6.2.6.5)
>  Corrected description of Event and DTC suppression
(chapters 3.10, 6.2.6.4, 6.2.6.5)
>  Introduced chapter 3.4.4.2
>  Clarified usage of DTC groups (chapter 8.3)
M. Heil
2014-10-14  4.0.0
>  Moved Initialization Pointer (see Dem_PreInit(),
A. Ditte
Dem_Init())
>  Added API Dem_RequestNvSynchronization()
>  Added de-bounce values in NVRAM and API
Dem_NvM_InitDebounceData()
>  Added additional aging variant (chapter 3.6), added
Figure 3-4
>  Added missing configuration variants (chapter 2,
ESCAN00076237)
>  Added description for NVRAM write frequency (chapter
3.14.2, ESCAN00078587)
>  Added description for NVRAM recovery (chapter 3.14.3,
ESCAN00078582)
>  Added support of J1939 nodes
M. Heil
2015-02-27  4.1.0
>  Added APIs, chapters 6.2.6.3, 6.2.6.22
>  Support EnableCondition notification, 3.16.5
>  Added explanation of Dem task mapping, chapter 4.9
>  Added note of reduced queue depth for some events,
chapter no longer available
>  Updated critical sections, chapter 4.4
M. Heil
2015-04-20  4.1.1
>  Added deviation regarding notification signatures
(chapters 6.5.1, 8.1)
>  Reworked chapter 3.1 according ESCAN00082555
M. Heil
2015-06-17  4.2.0
>  Extended data callback support (chapters 3.11.3,
6.5.1.6)
>  Described FDC statistics for DTCs using internal de-
bouncing (chapter 3.11.2)
>  Described aging target 0 (chapter 3.6.1)
>  Described effect of asynchronous behavior of $85
(chapter 3.8)
>  Described different aging behavior (chapter 3.6.5)
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
M. Heil
2015-09-14  4.3.0
>  More information about NVRam setup (chapter 4.5 ff)
>  Changes due to new option to persist event availability
(chapters 3.10.1, 6.2.6.27, 6.2.6.13)
M. Heil
2015-11-26
5.0.0
>  Reworked aging behavior, added new behavior (Table
3-5, Figure 3-4)
>  Clarifications on feature support
>  Fixed ESCAN00086243 (chapter 4.5.1)
>  Fixed ESCAN00086483 (chapter 4.5.2.2)
M. Heil
2016-01-20  5.0.1
>  No changes
M. Heil
2016-02-03  6.0.0
>  Change Dcm notification handling (chapters 3.16.3,
chapter no longer available)
>  Fixed ESCAN00087584 (chapter 4.5.2)
>  Fixed ESCAN00088862 (chapter 5)
>  Reworked NV write frequency Table 3-8
>  Changed APIs according to RfC72121(chapters 6.2.9.1,
6.2.9.8)
>  Reworked Autosar deviation Table 3-2
>  Added new header files to Table 4-1
A. Ditte
2016-04-19  6.0.1
>  Added internal data element DEM_OBD_RATIO in
chapter 3.11.2
M. Heil
2016-04-22
>  Fixed ESCAN00089671 (chapter 4.5)
M. Heil
-
6.1.0
>  Version skipped
A. Bosch
2016-05-04  6.2.0
>  Extended number of supported enable and storage
conditions (chapter 3.8, 3.9)
>  Added API Dem_GetDebouncingOfEvent()
>  Extended EventStatus values for API
Dem_SetEventStatus()
>  Fixed ESCAN00089498 (Table 3-7  DTC status
combination)
M. Heil
2016-07-12
>  Explicitly mention that NVRAM needs to be initialized
after a SW update (chapter 4.5.2.3)
>  Added clarification for combined events to
DEM_OBD_RATIO in chapter 3.11.2
A. Bosch
2016-10-25  6.3.0
>  Support for S/R callbacks
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
M. Heil
2016-11-15
7.0.0
>  MultiCore/MultiPartition support
>  API change to ASR4.3 (chapters 3.4.1 including all
subchapters, 3.4.2, 3.4.3, 3.4.4, 3.13.2, 3.15, 3.16,
3.19.1, 3.21, 4.6.3, 6.2.6.1, 6.2.6.8, 6.2.6.9, 6.2.6.18,
6.2.6.19, 6.2.6.21, 6.2.6.22, 6.2.6.28, 6.2.6.31, 6.2.6.32,
6.2.6.33, 6.2.7.1, 6.2.8 including all subchapters, 8.1,
8.3)

A. Bosch
2016-12-15
>  Reworked initialization sequence (chapter 3.2)
>  Added and adapted APIs in chapter 6.2
E. Jeglorz  2017-01-12
>  Rework of API Dem_SetEventStatus() and Storage
Trigger (chapter 3.11.1) due to support of
DEM_EVENT_STATUS_FDC_THRESHOLD_REACHED
M. Heil
2017-04-10  7.1.0
>  Added ClearDTC notifications (chapters 3.16.6,
6.5.1.12, 6.6.1.2.13)
A. Bosch
2017-04-18  7.2.0
>  Fixed ESCAN00094549 (chapter 3.16)
S. Hübner  2017-05-02
>  Added TriggerOnMonitorStatus notification
(chapters 3.16.1, 4.1.2, 6.5.1.13 and Figure 4-1)
A. Bosch
2017-05-04
>  Adapted chapter 3.21 for multiple clients
A. Nair
2017-05-18  7.3.0
>  Rework of API Dem_SetDTCSuppression()
>  Added API Dem_GetDTCSuppression()
S. Hübner  2017-05-22
>  Rework include structure of RTE files in chapters 4.1.2
and 4.2
A. Bosch
2017-05-23
>  Added API Dem_GetEventStatus() to chapter 6.2.6.8 for
compatibility reasons.
E. Jeglorz  2017-06-14  7.4.0
>  Added API Dem_GetOperationCycleState() to chapter
6.2.6.7
A. Bosch
2017-06-20
>  Added healing counters to chapter 3.11.2
S. Ates
2017-06-21
>  Rework of API Dem_SelectDTC()
S. Hübner  2017-07-03
>  Rework argument description and return values of
ch 6.2.6.18 Dem_GetEventFreezeFrameDataEx() and
ch 6.2.6.19 Dem_GetEventExtendedDataRecordEx()
A. Nair
2017-07-04
>  Added description for Dem_MemMap.h
A. Bosch
2017-07-12  7.5.0
>  Adapt API description due to changes with ASR4.3in
chapters 6.2.6.8, 6.2.6.18 and 6.2.8.17
>  Fixed ESCAN00096024 (chapter 6.2.6.23)
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
A.Nair
2017-08-25  7.6.0
>  Updated the list of functions using Exclusive Area 0
M.Heil
2017-08-30
>  Break down the multi partition concept in sub-chapters
(chapter 3.2)
M.Heil
2017-09-11
7.6.1
>  Fixed ESCAN00096543 (chapters 4.1, 4.2)

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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
Reference Documents
No.
Source
Title
Version
[1]   AUTOSAR
AUTOSAR_SWS_DiagnosticEventManager.pdf
V4.2.0,
V4.3.0,
V5.1.0
[2]   AUTOSAR
AUTOSAR_SWS_DevelopmentErrorTracer.pdf
V3.2.0
[3]   AUTOSAR
AUTOSAR_SWS_DiagnosticCommunicationManager.pdf
V4.2.0
[4]   AUTOSAR
AUTOSAR_SWS_NVRAMManager.pdf
V3.2.0
[5]   AUTOSAR
AUTOSAR_SWS_StandardTypes.pdf
V1.3.0
[6]   AUTOSAR
AUTOSAR_TR_BSWModuleList.pdf
V1.6.0
[7]   ISO
14229-1 Road vehicles – Unified diagnostic services (UDS)  -
– Part 1: Specification and requirements
[8]   Vector
TechnicalReference_PostBuildLoadable.pdf
See delivery
[9]   Vector
TechnicalReference_IdentityManager.pdf
See delivery
[10]  Vector
TechnicalReference_Dem_Obd.pdf
See delivery
(only available if OBD is licensed)

Caution
We have configured the programs in accordance with your specifications in the
  questionnaire. Whereas the programs do support other configurations than the one
specified in your questionnaire, Vector´s release of the programs delivered to your
company is expressly restricted to the configuration you have specified in the
questionnaire.

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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
1  Component History
The  component  history  gives  an  overview  over  the  important  milestones  that  are
supported in the different versions of the component.
Component Version  New Features
4.00.00
1st Release Version
4.03.00
Production Release
5.00.00
Post-Build support
6.00.00
J1939 support, API according to ASR 4.1.2
7.00.00
Change of initialization to allow Postbuild-Selectable
8.00.00
Support API according to ASR 4.2.1
9.00.00
Technical completion of WWH-OBD
10.00.00
Configuration tool migration to Java 8
11.00.00
Preparation for Silent BSW
13.00.00
Multi-Partition Support, Autosar 4.3.0
Table 1-1   Component history
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
2  Introduction
This  document  describes  the  functionality, API  and  configuration  of  the AUTOSAR  BSW
module Diagnostic Event Manager “Dem” as specified in [1].

Supported AUTOSAR
4
Release*:
Supported Configuration
pre-compile, post-build loadable, post-build selectable
Variants:
Vendor ID:
DEM_VENDOR_ID
30 decimal
(= Vector-Informatik,
according to HIS)
Module ID:
DEM_MODULE_ID
54 decimal
(according to ref. [6])
Version Information
DEM_AR_RELEASE_MAJOR_VERSION
version literal,
DEM_AR_RELEASE_MINOR_VERSION
decimal
DEM_AR_RELEASE_REVISION_VERSION
DEM_SW_MAJOR_VERSION
DEM_SW_MINOR_VERSION
DEM_SW_PATCH_VERSION
* For the precise AUTOSAR Release 4.x please see the release specific documentation.

The  Dem  is  responsible  for  processing  and  storing  diagnostic  events  (both  externally
visible  DTCs  and  internal  events  reported  by  other  BSW  modules)  and  associated
environmental  data.  In  addition,  the  Dem  provides  the  fault  information  data  to  the  Dcm
and J1939Dcm (if applicable).
2.1
How to Read this Document
Here are some basic hints on how to navigate this document.
2.1.1
API Definitions
The application API of the Dem is usually never called directly. The functions declarations
here  are  given  for  documentation  purposes.  Parts  of  the  function  signatures  are  not
exposed to the actual caller, and represent an implementation detail.
Nonetheless,  this  documentation  refers  to  the  Dem  API  directly  when  describing  the
different features, as the actual name of the API called by the application is defined by the
application itself.  Instead of a sentence referring to this fact the underlying Dem function
name is mentioned directly.
E.g.  If  the  documentation  mentions  the  API  Dem_SetOperationCycleState,  a  client
module  would  call  a  service  function  resembling  Rte_Call_<APPLDEFINED>-
_SetOperationCycleState.
An application is strongly advised to never call the Dem API directly, but to use the service
interface instead.
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
2.1.2
Configuration References
When this text references a configuration parameter or container, the references are given
in the format of a navigation path:
>  /ModuleDefinition/ContainerDefinition/Definition:
The absolute variant is used for references in a different module. These references
start with a slash and the module definition. E.g. /NvM/NvMBlockDescriptor
>  ContainerDefinition/Definition:
The relative variant is used for references to parameters of the Dem itself. For brevity
the module definition has been omitted.
In both variants the last definition can be either of type container, parameter or reference.
This  document  does not  duplicate  the  parameter  description,  so please  also  refer  to  the
module’s  parameter  definition  file  (BSWMD-file)  for  an  exhaustive  description  of  the
available configuration parameters.
2.2
Architecture Overview
The following figure shows where the Dem is located in the AUTOSAR architecture.

Figure 2-1  AUTOSAR 4.1 Architecture Overview
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
The next figure shows the interfaces to adjacent modules of the Dem. These interfaces are
described in chapter 5.2.3.
class Architecture
Rte
Det
Dem
Dlt
Dcm
FiM
SchM
Nv M
EcuM
BSW
J1939Dcm
Os

Figure 2-2  Interfaces to adjacent modules of the Dem

Caution
Applications do not access the services of the BSW modules directly. They use
  the service ports provided by the BSW modules via the RTE. The service ports
provided by the Dem are listed in chapter 6.6 and are defined in [1].

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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
3  Functional Description
3.1
Features
The features listed in the following tables cover the complete functionality specified for the
Dem.
The AUTOSAR  standard  functionality  is  specified  in  [1],  the  corresponding  features  are
listed in the tables
>  Table 3-1   Supported AUTOSAR standard conform features
>  Table 3-2   Not supported AUTOSAR standard conform features
For further information of not supported features see also chapter 7.3.1.
Vector Informatik provides further Dem functionality beyond the AUTOSAR standard. The
corresponding features are listed in the table
>  Table 3-3   Features provided beyond the AUTOSAR standard

The following features specified in [1] are supported:
Supported AUTOSAR Standard Conform Features
Post-Build Loadable
MICROSAR Identity Manager using Post-Build Selectable
Module individual post-build loadable update
OBD II / WWH-OBD functionalities and APIs, only if licensed accordingly.
All non-optional features described in [1], except features described below
Table 3-1   Supported AUTOSAR standard conform features
The following features specified in [1] are not supported:
Category  Description
ASR version
Configuration
Config
/AUTOSAR/EcucDefs/Dem/DemGeneral/DemFreezeFrameRecNumClass/De
4.1.2
mFreezeFrameRecordClassRef
Configuration of configured snapshot records is based on 4.0.3. For details
please refer to the Module Parameter Description (BSWMD).
Config
/AUTOSAR/EcucDefs/Dem/DemGeneral/DemOperationCycle/DemOperationC 4.1.2
ycleAutostart
Configuration of automatic start of an operation cycle is only possible for one
cycle. For details please refer to the Module Parameter Description (BSWMD).
Config
Service Needs are neither provided nor evaluated.
4.0.3
Config
Multiplicity of some elements is restricted. For details please refer to the
4.0.3
Module Parameter Description (BSWMD).
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
Config
/AUTOSAR/EcucDefs/Dem/DemGeneral/DemEventMemorySet and
4.3.0
references to these EventMemorySets are not supported. The Dem only
provides one Primary memory and one optional Secondary memory.
OperationCyles
Functional  AgingCycles
4.0.3 – 4.2.1
Aging cycles which are only used for aging and the corresponding API
Dem_SetAgingCycleState(). Use operation cycles instead.
Functional  Chapter 7.3.9.2 (4.0.3) resp. 7.6.10.2 (since 4.1.2) External aging
4.0.3 – 4.2.1
Centralized operation cycles and corresponding APIs are not available.
Functional  Chapter 7.7 BSW Error Handling
4.0.3
All operation cycles are evaluated before initialization. To be able to report
BSW errors, these need to use a cycle which is automatically started.
Functional  Chapter 7.3.8 (4.1.2) resp. 7.6.8 (4.2.1) Operation Cycle Management
4.1.2
The Dem implicitly stops volatile cycles during shutdown. No DET is called in
this situation.
ClearDTC
Functional  Chapter 7.3.2.2 (4.1.2) resp. 7.6.2.2 (4.2.1) Clearing event memory entries
4.1.2
Partial status clear is not supported. Clearing a DTC is either completely
blocked, or the DTC is completely removed from memory.
Application integration
Functional  Chapter 7.3.7.1 (4.0.3, 4.1.2) resp. 7.6.7.1 (4.2.1) Storage of freeze frame data  4.0.3
Chapter 7.3.7.3 (4.0.3, 4.1.2) resp. 7.6.7.3 (4.2.1) Storage of extended data
Data collection is always performed on task level, never in the context of the
caller of Dem_SetEventStatus or Dem_ReportErrorStatus.
Functional  Chapter 7.3.7.3 (4.1.2) resp. 7.6.7.3 (4.2.1) Storage of extended data
4.1.2
For extended records collected from a user callback with NV storage, the Dem
only supports the data collection trigger ‘on Test Failed’.
Functional  Chapter 7.3.1.2 through 7.3.1.3 (4.0.3, 4.1.2) resp. 7.6.1.2 through 7.6.1.3
4.0.3-4.2.1
(4.2.1)
Status bit transitions are implemented asynchronously according to 4.3.0. UDS
Bit transitions will be performed only on the Dem main function.
Functional  Chapters 7.3.6, 7.3.7, 7.5
4.1.2-4.3.0
Components and Event Dependencies are not implemented. Similar
functionality can be achieved using the FiM module.
Functional  Chapter 7.6 (4.2.1) resp. 7.7
4.2.1-4.3.0
Limited support for multiple event memories. The Dem only supports one
primary memory and one secondary memory. Multiple user-defined memories
and EventMemorySets are not supported.
Functional  Chapter 7.8
4.3.0
Report of DEM_EVENT_STATUS_FDC_THRESHOLD_REACHED is queued
before Dem_Init.
API
Chapter 8.3.3 Dem_GetEventStatus
4.0.3-4.2.1
Application interfaces are implemented according to 4.3.0, the old interfaces
are not supported. Use GetEventUdsStatus instead.
API
Chapter 8.3.3 Dem_GetEventExtendedDataRecord,
4.1.2-4.2.1
Dem_GetEventFreezeFrameData
Application interfaces are implemented according to 4.3.0, the old interfaces
are not supported. Use Dem_GetEventExtendedDataRecordEx and
Dem_GetEventFreezeFrameDataEx instead.
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
API
Chapter 8.3.3 Dem_GetEventMemoryOverflow,
4.0.3-4.2.1
Dem_GetNumberOfEventMemoryEntries
Application interfaces are implemented according to 4.3.0, the old interfaces
are not supported.
API
Chapter 8.3.3 Dem_ClearDTC
4.1.2-4.2.1
Application interfaces are implemented according to 4.3.0, the old interfaces
are not supported.
API
Chapter 7.3.1.5 (4.0.3, 4.1.2) resp. 7.6.1.5 (4.2.1)
4.0.3-4.2.1
Status notifications are called from the Dem MainFunction only, never
synchronously in context of the monitor report.
BSW integration
Functional  Chapter 7.8.6 (4.0.3), 7.9.7(4.1.2) resp. 7.10.7 (4.2.1) Interaction with
4.0.3
Diagnostic Log & Trace (Dlt)
The APIs to read snapshot and extended data from DLT are not supported.
Functional  Chapter 7.13 (4.0.3), 7.14 (4.1.2), resp 7.15 (4.2.1) Debugging Support
4.0.3
No support for public access to internal variables is provided.
API
FiM_DemInit()
4.0.3
This API is never called by the Dem.
API
FiM_DemTriggerOnMonitorStatus()
4.3.0
This API is never called by the Dem. Instead, the Dem calls the prior API
FiM_DemTriggerOnEventStatus
API,
Chapter 8.3.4 Dcm Interfaces
4.0.3-4.2.1
Functional  The Dcm interfaces are implemented according to 4.3.0, including RfC#76727.
The old interfaces are not supported. This includes asynchronous behavior of
most APIs.
API
Chapter 8.3.5 (4.1.2) resp. 8.3.6 (4.2.1) J1939Dcm Interfaces
4.1.2
The J1939Dcm interfaces are based on 4.2.1 and incorporate the changes of
RfC#72121.
Miscellaneous
Functional  Mirror Memory
4.0.3
Mirror Memory solutions are manufacturer specific and not supported.
Functional  Chapter 7.3.5 (4.0.3), 7.3.5.2 (4.1.2) resp. 7.6.5.2 (4.2.1) Event Combination
4.0.3
Type 2 / Event Combination on Retrieval
Only combination Type 1 / On Storage is supported.
Functional  Indicator-Event specific set and reset condition
4.0.3
Indicators are enabled together with the event confirmation, i.e. when bit 3 is
set. Healing is always done based on the event status byte (UDS status).
Table 3-2   Not supported AUTOSAR standard conform features
The following features are provided beyond the AUTOSAR standard:
Features Provided Beyond The AUTOSAR Standard
Interface Dem_InitMemory()
This function can be used to initialize static RAM variables in case the start-up code is not used
to initialize RAM. Refer to chapter 6.2.5.7.
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
Features Provided Beyond The AUTOSAR Standard
Interface Dem_PostRunRequested()
Allows the application to test if the Dem can be shut down safely. For details refer to chapter
6.2.6.23.
Selective non-volatile mirror invalidation on configuration change
Allows the controlled reset of the Dem non-volatile data, without invalidating the whole non-
volatile data or manual initialization algorithms. For details refer to chapter 4.5.2.1
Extended set of internal data elements
In addition to the set defined in [1], the Dem provides additional internal data elements. Refer to
chapter 3.11.1 for the complete list.
Extended support for ClientServer Data callbacks, see chapter 3.11.3
Variants on status bit handling in case of memory overflow, see chapter 3.4.4.1
Option to prevent aging of event entries to remove stored environment data (e.g. snapshot
records)
Multiple variants for aging behavior regarding healing, see chapter 3.6.5
Option to distribute runtime of ClearDTC operation across multiple tasks
Configurable copy routine, see chapter 4.3.1
Request for NV data synchronization, see Dem_RequestNvSynchronization()
Table 3-3 Features provided beyond the AUTOSAR standard

3.2
Dem Module Architecture

Figure 3-1 Dem Architecture Overview
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
The Dem is separated logically into multiple interacting software components:
>  For each OS partition configured with Dem access, a dedicated DemSatellite  service
SWC provides the interfaces DiagnosticMonitor (chapter 6.6.1.1.1) and DiagnosticInfo
(chapter 6.6.1.1.2).
>  For  one  OS  partition,  a  DemMaster  service  SWC  provides  the  remainder  of  the
AUTOSAR interfaces.

Changes
To support the decomposition into Master and Satellite, the Dem implementation
  follows the Autosar 4.3 architecture. Event status updates are handled asynchronously
for all events, not only BSW events.

3.2.1
Dem Satellite(s)
A  DemSatellite  performs  de-bouncing  locally;  this  includes  counter-  and  timebased
debouncing. Also, the DemSatellite provides access to the MonitorStatus introduced in [1]
(4.3.0).
As  long  as  application  ports  only  connect  to  the  local  DemSatellite  there  is  no  runtime
overhead for Dem calls.
3.2.2
Dem Master
The  actual  event  processing  like  UDS  status,  storage  of  environmental  data  and
notification  handling  is  performed  on  the  DemMaster  service  component.  Also,  the
DemMaster is the source of all configured callbacks or notifications.
Please be aware that while it is possible to call operations on the DemMaster across OS
partitions, this can incur additional cost introduced by the RTE to implement the necessary
synchronization.
Map the DemMaster to the OS partition from where most accesses originate to minimize
this runtime overhead.

Caution
To  correctly  notify  SWCs  mapped  to  a  different  OS  partition,  you  could  use  an  RTE
  port.  If  you  configure  callbacks  as  direct  function  call,  you  have  to  implement  the
necessary  mechanisms  (trusted  function  call,  OsSetEvent/WaitEvent…  inside  the
callback function.
While  this  is  more  complicated,  an  implementation  might  simply  set  a  flag  in  the
configured  callback  which  is  polled  by  the  SWC  to  notify.  This  can  be  more  efficient
than the generic code generated by the RTE.

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3.2.3
Communication constraints
To circumvent expensive general cross-partition communication implemented by the RTE,
the  Dem  uses  internal  data  exchange  based  on  shared  memory  and  atomic
compare/exchange instructions.
This requires the following access permissions:
>  The  DemMaster  requires  Read/Write  access  to  its  own  data  and  that  of  all
DemSatellites.
>  Each DemSatellite requires Read/Write access to its own data only, and requires Read
access to the data of all other satellites and the DemMaster.
This memory mapping requires a customized MemMap.h, please refer to chapter  4.3 for
common integration tasks.
Instructions for efficient synchronization are provided by all multi-core platforms. However,
due  to  the  lack  of  a  common  library  an  implementation  needs  to  be  provided  during
integration. For details please refer to chapter 4.4.
3.3
Initialization
Initialization of the Dem module is a multiple-step process.
First,  using  the  interface  Dem_MasterPreInit()  from  the  master  partition,  the  Dem
loads a preliminary configuration.
After that the NvM can begin to restore the Dem state from the NvRAM and all satellites
can  be  set  to  a  state  of  reduced  functionality  using  Dem_SatellitePreInit().  After
this step, events assigned to the respective satellite can report monitor results to the Dem
using Dem_SetEventStatus().
After the satellites have been pre-initialized and after the NvM has finished the restoration
of  the  NVRAM  mirror  data,  the  Dem  master  can  be  brought  to  full  function  using  the
interface  Dem_MasterInit(),  followed  by  the  initialization  of  the  satellites  per  call  of
Dem_SatelliteInit(). Additionally, the interface Dem_MasterInit() can be used to
reinitialize the master after Dem_Shutdown() was called.
For  configurations  using  a  single  OS  partition,  the  standard  AUTOSAR  initialization
sequence  is  still  supported.  Please  refer  to  [1],  Dem_PreInit()  (chapter  6.2.5.3)  and
Dem_Init() (chapter 6.2.5.6) for more information.

Caution
This Dem implementation is not consistent with Autosar regarding the initialization API.
  Both Dem_PreInit() and Dem_Init() take a configuration pointer. Please adapt
your initialization sequence accordingly.

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Caution
The  APIs  Dem_PreInit()  and  Dem_Init()  can  be  used  to  combine  the
  initialization  of  master  and  satellite,  but  only  in  configurations  with  a  single
partition. After  calling  Dem_Shutdown()  always  Dem_MasterInit()  has  to
be used to reinitialize the Dem.

Note
If a changed configuration set is flashed to an existing ECU, the NVRAM mirror
  variables of the Dem must be re-initialized before Dem_MasterInit() is called.
There are several ways how this can be implemented. Please also refer to
chapter 4.5 regarding the correct setup.
  Using the NvM which can be configured to invalidate data on configuration
change.
  Using the Dem which supports a similar feature as the NvM using the
configuration option ‘DemCompiledConfigId’. In this case
Dem_MasterInit() will take care of the re-initialization.
  Before calling Dem_MasterInit() it is safe to call the initialization functions
configured for usage by the NvM. Additionally, all primary and secondary
data can to be cleared by overwriting each RAM variable
Dem_Cfg_[Primary|Secondary]Entry_<N> with the contents of
Dem_MemoryEntryInit.

3.3.1
Initialization States
After the (re)start of the ECU the Dem is in state “UNINITIALIZED”. In this state the Dem is
not operable until the interface Dem_MasterPreInit() was called.
Dem_MasterPreInit()  will  change  the  state  of  the  master  to  “PREINITIALIZED”.  The
state
of
each
satellite
is
set
to
“PREINITIALIZED”
by
the
call
of
Dem_SatellitePreInit().  Within  this  state  only  BSW  errors  from  the  respective
satellite  can  be  reported  via  Dem_SetEventStatus().  Enable  conditions  are  not
considered in this phase.
During  initialization  via  Dem_MasterInit()  resp.  Dem_SatelliteInit()the  state  of
the master resp. satellite is set to “INITIALIZED” and the Dem is fully operable afterwards.
In this phase enable conditions are initialized to their configured default state and can take
effect.
Dem_Shutdown()  will  finalize  all  pending  operations  in  the  Dem,  deactivate  the  event
processing done by the master and change the state of the master to “SHUTDOWN”. If the
master is in state “SHUTDOWN” events can still be reported, as they are handled by the
respective satellite.
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The  function  Dem_MasterMainFunction()  resp.  Dem_SatelliteMainFunction()
can be called as long as the master resp. the related satellite is in state “INITIALIZED”.
In case SilentBSW checks are enabled, failing run-time checks will cause the Dem to enter
state ‘HALTED_AFTER_ERROR’. Please refer to chapter 3.19.1.2 for more details.
Figure 3-2 provides an overview of the described behavior.

Changes
Prior versions (Implementation version < 7.00.00) did consider the configured enable
  conditions during the pre-initialization phase.

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stm Module Initialization
Normal Operation
Restored Nv RAM
notes
NvM_ReadAll
- all blocks used by Dem are
restored
PREINITIALIZED (Satellite 1)
INITIALIZED (Satellite 1)
notes
notes
Dem_SatelliteInit
- This Dem Satellite is
- All APIs can be used on this
Dem_SatellitePreInit
pre-initialized
satellite
- Most APIs will throw a DET
UNINITIALIZED
PREINITIALIZED (Master)
error
INITIALIZED (Master)
- API Dem_SetEventStatus
can be used on this satellite
notes
notes
notes
Dem_MemoryInit,
Dem_MasterPreInit
Startup Code
- Dem is not initialized
- APIs will throw a DET
- All Master APIs can be
Dem_MasterInit
- APIs will throw a DET
error
accessed without a DET
error
- Initial Dem configuration
error
Initial
PREINITIALIZED (Satellite 2)
INITIALIZED (Satellite 2)
- Dem internal variables
is available
- Dem does access (and
have random value
modify) the NVRAM mirror
notes
- NV content is validated
notes
- Final Dem configuration is
Dem_SatelliteInit
Dem_SatellitePreInit
- This Dem Satellite is
available
- All APIs can be used on this
pre-initialized
satellite
- Most APIs will throw a DET
error
- API Dem_SetEventStatus
Dem_Shutdown
can be used on this satellite
Dem_MasterInit
Without configuration
PREINITIALIZED (Satellite N)
SHUTDOWN (Master)
INITIALIZED (Satellite N)
change
notes
notes
notes
Dem_SatelliteInit
- This Dem Satellite is
- Master APIs will throw a
- All APIs can be used on this
Dem_SatellitePreInit
pre-initialized
DET
satellite
- Most APIs will throw a DET
- Dem Master will no longer
error
process the satellite event
- API Dem_SetEventStatus
queues
can be used on this satellite
- Dem will not modify the
NVRAM mirror
- Dem has updated the NvM
block modification state
Run-time check
fails
HALTED_AFTER_ERROR
notes
Dem is disabled due to failed run-time checks
Power
Down

Figure 3-2 Dem states
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3.4
Diagnostic Event Processing
A  diagnostic  event  defines  the  result  of  a  monitor  which  can  be  located  in  a  SWC  or  a
BSW  module.  These  monitors  can  report  an  event  as  a  qualified  test  result  by  calling
Dem_ReportErrorStatus() or Dem_SetEventStatus() with “Failed” or “Passed” or
as  a  pre-qualified  test  result  by  using  the  event  de-bouncing  with  “PreFailed”  or
“PrePassed”.
In order to use pre-qualified test results the reported event must be configured with a de-
bounce algorithm. Otherwise (using monitor internal de-bouncing) pre-qualified results will
cause a DET report and are ignored.
3.4.1
Event De-bouncing
The Dem implements the mechanisms described below:
3.4.1.1
Counter Based Algorithm
A  monitor  must  trigger  the  Dem  actively,  usually  multiple  times,  before  an  event  will  be
qualified as passed or failed. Each separate trigger will add (or subtract) a configured step
size value to a counter value, and the event will be qualified as ‘failed’ or ‘passed’ once this
de-bounce counter reaches the respective configured threshold value.
The  configurable  thresholds  support  a  range  for  the  de-bounce  counter  of  -32768  …
32767.  For  external  reports  its  current  value  will  be  mapped  linearly  to  the  UDS  fault
detection counter which supports a range of -128 … 127.

Caution
Threshold values of 0 to detect a qualified failed or qualified passed result are allowed
  in some Autosar versions, but this implementation does not support such a setting.

If  enabled,  counter  based  de-bounced  events  can  de-bounce  across  multiple  power
cycles. Therefore the counter value is persisted into non-volatile memory during shutdown
of the ECU.
3.4.1.2
Time Based Algorithm
For events  using time based de-bouncing,  the application only needs to trigger the Dem
once in order to set a qualification direction. The event will be qualified after the configured
de-bounce time has elapsed. Multiple triggers for the same event and same qualification
direction have no effect.
Each event report results at most in reloading a software timer due to a direction change.
Once an event was reported, the timer is stopped by
>  A “clear DTC” command
>  The restart of the event’s associated “Operation cycle”
>  Deactivation of (one of) the event’s associated enable condition
>  API Dem_ResetEventStatus()
>  API Dem_ResetEventDebounceStatus().
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Event  de-bouncing  via  time  based  algorithm  requires  comparatively  high  CPU  runtime
usage.  To  alleviate  this,  the  Dem  supports  both  a  high  resolution  timer  (a  Dem  main
function call equals a timer tick) and a low resolution timer (e.g. 150ms equals a timer tick).
Events  which  have  a  de-bounce time  greater  than  5  seconds  will  use  the  low  resolution
timer per default. Still, software timers are expensive and should be used sparingly.

Note
The timer ticks are processed on the Dem main task. If you report an event using time-
  based de-bouncing before the Dem is initialized, the timer will only start running when
the system has reached the point where cyclic tasks are served.

Note
Time based de-bouncing is processed for each satellite individually. Each satellite has
  its own timer. On call of Dem_SatelliteMainFunction() for the respective satellite
this timer is processed and de-bouncing for all events assigned to the satellite is
continued.

3.4.1.3
Monitor internal de-bouncing
If the application implements the  de-bouncing algorithm itself, a callback function can be
provided,  which  is  used  for  reporting  the  current  fault  detection  value  to  the  diagnostics
layer.
These  functions  should  not  implement  logic,  since  they  are  called  in  runtime  extensive
context.
If monitor internal de-bouncing is configured for an event, its monitor  cannot request de-
bouncing  by  the  Dem  (i.e.  trigger  operation  SetEventStatus  with  monitor  results
DEM_STATUS_PRE_FAILED or DEM_STATUS_PRE_PASSED). This would also result in
a DET report in case development error detection is enabled. The Dem module does not
have the necessary information to process these types of monitor results.

Workaround (before version 6.00.00)
If you do not want de-bouncing for an event at all, e.g. only report qualified passed and
  failed results, you should consider using counter based de-bouncing for these events.
For efficiency reasons, only choose monitor internal de-bouncing if you need to provide
the callback function.
Since version 6.00.00 the callback function for internal de-bouncing is optional.

3.4.2
Event Reporting
Monitors  may  report  test  results  either  by  PortInterface  or,  in  case  of  a  complex  device
driver or basic software module, by direct C API.
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Changes
Event processing has changed significantly in Autosar 4.3.0. Since version 13.00.00 all
  event reports are processed on task level.
As a result it is no longer relevant to distinguish between BSW and SWC events, the
API Dem_ReportErrorStatus() is no longer necessary (this implementation still provides
it for compatibility reasons).
Both SWC and CDD modules can call Dem_SetEventStatus(), either via RTE or
directly. Since Dem_ReportErrorStatus() lacks a return code it is recommended to
implement monitors using Dem_SetEventStatus().

Caution
Status reports do not maintain relative order. I.e. the Dem will not guarantee that
  multiple event reports are processed in the same order that they had been reported in.
This is mainly due to the additional resources required for no apparent benefit.
Reports for the same event are of course processed in order.
Example: Reporting order F1, F2, P2, P1 would be processed as F1, P1, F2, P2, which still
preserves the order per event.

3.4.3
Monitor Status
Every event supports a monitor status information which is updated synchronously with the
monitor reports:
>  Bit 0 – TestFailed
The bit indicates the last qualified test result (passed or failed) reported by the monitor.
>  Bit 1 – TestNotCompletedThisOperationCycle
The bit indicates if the monitor has reached a qualified test result (passed or failed) in
the current operation cycle.
3.4.4
Event Status
Every  event  supports  a  status  byte  whereas  each  bit  represents  different  status
information. For detailed information please refer to [7]. Calculation and change notification
(chapter 3.16) of these bits is performed asynchronously on the Dem main function.
>  Bit 0 – TestFailed
The bit indicates the qualified result of the most recent test.
>  Bit 1 – TestFailedThisOperationCycle
The bit indicates if during the active operation cycle the event was qualified as failed.
>  Bit 2 – PendingDTC
This bit indicates if during a past or current operation cycle the event has been
qualified as failed, and has not tested ‘passed’ for a whole cycle since the failed result
was reported.
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>  Bit 3 – ConfirmedDTC
The bit indicates that the event has been detected enough times that it was stored in
long term memory.
>  Bit 4 – TestNotCompletedSinceLastClear
This bit indicates if the event has been qualified (passed or failed) since the fault
memory has been cleared.
>  Bit 5 – TestFailedSinceLastClear
This bit indicates if the event has been qualified as failed since the fault memory has
been cleared.
>  Bit 6 – TestNotCompletedThisOperationCycle
This bit indicates if the event has been qualified (passed or failed) during the active
operation cycle.
>  Bit 7 – WarningIndicatorRequested
The bit indicates if a warning indicator for this event is active.
3.4.4.1
Event Storage modifying Status Bits
Several  UDS  status  bit  transitions  depend  on  successful  event  storage.  The  Dem  offers
multiple interpretations of these transitions when taking event displacement into account.
For status bits 2 – PendingDTC, 3 – ConfirmedDTC and 7 – WarningIndicatorRequested
there are two alternatives ‘Stored Only’ and ‘All DTC’ – see Figure 3-3.
For status bit 5 – TestFailedSinceLastClear the alternatives ‘Stored Only’ and ‘All DTC’ are
supported as well, along with a third option to select different reset conditions for this bit.
Please also see chapter 3.6.4.
The usual bit transitions are not affected by this option. It only selects the behavior in case
of event memory overflow and displacement.

Figure 3-3  Effect of Precondition ‘Event Storage’ and Displacement on Status Bits
Due  to Autosar  standardized  naming  of  configuration  options,  the  settings  for  these  bits
are named differently for each bit, please refer to Table 3-4  Configuration  of  status  bit
processing for details.
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Status Bit
‘Stored Only’
‘All DTC’
Bit 2 – PendingDTC
DemPendingDtcProcessing =
DemPendingDtcProcessing =
(Vector Extension)
STORED_ONLY
ALL_DTC
Bit 3 – ConfirmedDTC
DemResetConfirmedBitOn-
DemResetConfirmedBitOnOverflow =
Overflow = TRUE
FALSE
Bit 5 – FailedSinceLastClear  DemStatusBitHandlingTest-
DemStatusBitHandlingTestFailed-
FailedSinceLastClear =
SinceLastClear = NORMAL or AGING
AGING_AND_DISPLACEMENT
Bit 7 – WarningIndicatorReq  DemWarningIndicatorRequested- DemWarningIndicatorRequested-
(Vector Extension)
Processing = STORED_ONLY
Processing = ALL_DTC
Note: WIR bit is not reset on
displacement due to additional
requirements
Table 3-4   Configuration of status bit processing
3.4.4.2
Lightweight Multiple Trips (FailureCycleCounterThreshold)
Enabling  the  feature  for  multiple  trips  (see  DemGeneral/DemMultipleTripSupport)  will
enable the full-fledged support, but at the cost of a non-volatile trip counter per event. The
common requirement of up to 2 trips (DemEventFailureCycleCounterThreshold <= 1) can
work without this added cost.
In case you want to reduce Dem  NVRAM consumption, you can disable the full support
for multiple trips, and still have support for up to 2 trips for event confirmation.

Caution
Although the UDS status byte normally allows distinguishing the first from the second
  trip, it is not sufficient information in all failure scenarios with ConfirmedDTC handled
‘STORED_ONLY’.
In case an event cannot enter the event memory (e.g. due to storage conditions or
overflow) at the time of the second trip, the Dem loses the information that the event
had already failed in the last operation cycle.
This means that failed event reports and re-occurrences of the DTC will not lead to
confirmation until the next operation cycle.
If this limitation is not acceptable for your ECU, you need to enable the full support for
multiple trips (DemMultipleTripSupport == true).

3.5
Event Displacement
In case all available memory slots are already used up by past events when a new event
needs to be entered, the Dem can displace a less important event. This is governed by the
following set of rules, in the order of mention:
>  Dedicated Aging Counters are repurposed first
>  Aged events are displaced before other events
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>  Lower prioritized events will be displaced by higher prioritized events. This step
depends on the configuration of event priorities and is omitted if each event has the
same priority.
>  Passive events of equal priority (test failed bit is not set) can be displaced if no lower
prioritized event can be found. This step can be omitted by configuration.
>  An active event of equal priority can be displaced if it has not been tested in the active
operation cycle. This step can be omitted by configuration.
If multiple events match, the oldest one is displaced. Age in this context is defined by the
point in time the event data was last updated.
If no event matches, an option exists to displace the oldest event whatever its state.
3.6
Event Aging
The process of aging resets status bit 3 – ConfirmedDTC when a sufficient amount of time
has elapsed so that the cause for the error entry is assumedly not relevant anymore. This
is often used as a trigger to also  clear stored snapshot or extended data from the event
memory.
In addition to the aging process defined in [1] there are further options. The differences are
summarized in Table 3-5.
In all cases the event ages only if it supports aging, and the aging process continues long
enough so the events aging counter reaches the defined threshold value.

Note
The Dem supports reporting the aging counter value ‘0x00’ as ‘0x01’. This has no effect
  on the actual aging of the DTC – If the aging target is configured to ‘0x01’, the DTC will
age when the aging counter reaches ‘0x01’ (see Figure 3-4), not when the counter
value ‘0x01’ is reported.

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Aging start condition
Aging continuation
Type 1 (Autosar
An event that is tested passed
At the end of the events aging
Default)
immediately starts to age.
cycle, if the event is not currently
active (tested failed).
Type 2
At the end of the events
At the end of the events aging
operation cycle, in case the
cycle, if the event is not currently
event is tested and did not test
active (tested failed).
‘failed’ in that cycle.
Type 4
An event that is tested passed
At the end of the events aging
immediately starts to age.
cycle, in case the event is tested in
its current operation cycle and is
currently not failed.
Types 3, 5
At the end of the events
At the end of the events aging
operation cycle, in case the
cycle, if the event is tested and not
event is tested and did not test
tested failed in its current operation
‘failed’ in that cycle.
cycle. I.e. untested cycles are not
considered.
Type 6
An event that is tested passed
At the end of the events aging
and had not been tested failed
cycle, if the event is tested and not
immediately starts to age.
tested failed in its current operation
cycle. I.e. untested cycles are not
considered.
Table 3-5 Aging algorithms

Figure 3-4 Behavior of the Aging Counter
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3.6.1
Aging Target ‘0’
Events  aging  ‘immediately’  are  handled  in  a  special  way,  depending  on  the  configured
aging algorithm.
In  general,  they  age  immediately  when  the  aging  start  condition  is  reached.  For  details
refer to Table 3-6.

Aging with target 0
Types 1, 4 and 6
When an event reports a passed result, and the DTC is tested passed
Types 2, 3
At the end of the event’s operation cycle, if the DTC was tested
passed and not tested failed in that cycle.
Type 5
When an event reports a passed result, the DTC is tested passed,
and not tested failed in that cycle.
Table 3-6   Immediate aging
3.6.2
Aging Counter Reallocation
To  implement  aging  of  events,  an  event  requires  an  aging  counter.  This  counter  is
contained within the event memory entry along with stored additional data. If the confirmed
bit is set  independently of event  storage (see chapter  3.4.4.1) events  do not  necessarily
have  the means  to  age,  even  if they meet  the precondition  (e.g.  test  completed and  not
tested failed for one operation cycle).
In this case the Dem module tries to reallocate a free memory entry for the aging event.
This event entry is used solely for the purpose of aging the confirmed DTC bit.

Caution
In case ConfirmedDTC is set independently of event storage (Setting ‘ALL DTC’, see
  chapter 3.4.4.1) DTCs do not necessarily age with the configured number of aging
cycles. This is not a bug, but a result of an insufficient amount of available aging
counters.

3.6.3
Aging of Environmental Data
Stored  data  can  optionally  be  discarded  or  kept  intake  once  a  DTC  has  completed  the
aging process and resets its ConfirmedDTC bit.
If the data is kept intact, it is reported to the Dcm in the same way it is reported for active
events.
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Caution
This setting has a negative side effect on reallocating aging counters (see chapter
  3.6.1), since the Dem prioritizes aged environmental data higher than the need for new
aging counters. There is no displacement of aged data due to a different, aging event.
Only a number of DTCs up to the available event memory entries can age, unless
events are cleared by other means, e.g. ClearDTC.

3.6.4
Aging of TestFailedSinceLastClear
The general status bit processing for bit 5 is described in chapter 3.4.3. There is however
an additional option to reset this bit when an event ages.
Currently the aging counter value required to reset Bit 5 is the same as for ConfirmedDTC,
so there is no way to age it at a later time.
Please  refer  to  the  configuration  parameter  DemGeneral/DemStatusBitHandlingTest-
FailedSinceLastClear for details.
3.6.5
Aging and Healing
Aging and healing normally happen in parallel. The Dem does not implement safe guards
to prevent aging before  healing has occurred. This situation is rather unusual and would
indicate a mistake in the configuration, or how the cycles are reported to the Dem.
For some use-cases like OBD II, it is supported to only start with the aging process once a
configured  indicator  request  has  completed  healing.  In  order  to  achieve  consistent
behavior across all DTC, this can be activated also for events not supporting an indicator.
This aspect of the aging behavior can be selected using the configuration switch
DemGeneral/DemAgingAfterHealing.
3.7
Operation Cycles
Each event is assigned to an operation cycle, e.g. ignition cycle. An operation cycle can be
started and stopped with the function Dem_SetOperationCycleState(). Reporting an
event to the Dem is possible only if its corresponding operation cycle is started – otherwise
the  report  will  be  discarded.  In  this  regard  the  operation  cycle  acts  as  additional  enable
condition which cannot be circumvented.
The operation cycle also is the basis for the status bits referring to ‘this operation cycle’ (Bit
1 and Bit 6), as well as the calculation of events that may or may not have occurred during
the whole cycle, e.g. to calculate the precondition for resetting Bit 2.
Since  operation  cycle  restarts  can  cause  a  lot  of  notification  function  calls,  the  actual
processing  is  done  asynchronously  on  the  Dem_MainFunction().  As  notification  for  the
finished processing, please use InitMonitorForX callbacks.
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Caution
Due to the asynchronous processing, operation cycle changes will get lost if you shut
  down the Dem module before a pending change is processed.

3.7.1
Persistent Storage of Operation Cycle State
The  Dem  provides  the  possibility  to  restore  the  state  of  operation  cycles  through  power
down. This feature has its caveats though.
The  persisted  state  of  operation  cycles  is  not  known  in  pre-initialization  state,  since  the
NvM which controls the non-volatile data relies on a pre-initialized Dem!
Until  the  Dem  is  completely  initialized  all  operation  cycles  are  inactive,  independently  of
their stored state. The persisted state  only  becomes active during  Dem_MasterInit(),
but this state modification is not counted as flank of the operation cycle state and will not
modify the DTC status bytes.

Caution
Even with persistent operation cycle storage enabled, during pre-initialization all cycles
  are in state ‘stopped’ since their real state is not known until full initialization. This will
cause discarded BSW error reports due to unfulfilled preconditions!

3.7.2
Automatic Operation Cycle Restart
Operation  cycles  automatically  count  as  enable  condition for  all  related  events,  meaning
that if a cycle is not started, monitor reports are not accepted. During ECU startup, there is
no valid way to start an operation cycle by API.
If  you  select  a  cycle  to  be  started  automatically,  it  will  be  treated  as  ‘started’  during  pre-
initialization, so event reports are possible.
Additionally,  all  calculations  resulting  from  an  operation  cycle  restart  are  done  in
Dem_MasterInit() – But be aware that all notification functions are skipped, since the
initialization status of the RTE is not known at this point.
The  DTC  status  calculation  is  performed  in  Dem_MasterInit()  ‘as  if’  the  cycle  had
started before Dem_MasterPreInit(). E.g. fault detection counters of related DTCs do
not reset to zero.
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Caution
Since the cycle is already started automatically you may not start it again from your
  application. This would be regarded as an additional, completed cycle and would cause
unwanted modifications of the event status, like premature aging of events.

Caution
Automatic restart of cycle skips all notifications – including event status change and
  monitor initialization callbacks. If you use this feature, your monitors need to initialize
their starting state in an initialization routine and cannot rely on an init-monitor
notification callback alone.

3.8
Enable Conditions and Control DTC Setting
Up  to  254  enable  conditions  can  be  assigned  to  an  event.  Only  if  all  assigned  enable
conditions are fulfilled the respective event reported via Dem_ReportErrorStatus() or
Dem_SetEventStatus() will lead to a change of the event status bits and a storage of
environmental data. Otherwise the event report will be discarded.
A  diagnostic  monitor  using  the  RTE  interfaces  to  report  events  can  evaluate  the  return
value of the SetEventStatus operation. In case event reports are discarded, this operation
will always return E_NOT_OK. It is not possible to tell the exact reason for the discarded
report.
Enable  condition  states  can  be  set  via  Dem_SetEnableCondition()  respectively  by
the corresponding port interface operation.

Changes
Since Implementation version 7.00.00, enable conditions do not take effect until after
  full initialization (Dem_MasterInit() resp. Dem_Init())

When an event’s enable conditions are not fulfilled, the Dem provides the option to reset or
to freeze an ongoing de-bouncing process. Using this feature  defers enabling an enable
condition  to  the  Dem  main  function,  because  it  involves  checking  all  events  if  they  are
affected by the change.
As a side effect, it is possible to lose enable condition changes that toggle faster than the
cycle time of the Dem main function.
The same applies to ControlDTCSetting.
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Changes
Since implementation version 8.00.00, enabling enable conditions and
  ControlDTCSetting are processed on the Dem main function. Activating an enable
condition will not have immediate effect. This change affects all configurations using
time-based de-bouncing, or the option to reset the de-bounce counters on enable
condition change.

Caution
EnableDTCSettings is processed on the main function, but the API was not changed to
  asynchronous by Autosar (RfC 69895). As a result, the Dcm will send the positive
response to service $85 before the DTCSettings have actually been enabled. This can
be observable as DTCs are not entered into the Dem until the Dem task function has
completed.

3.8.1
Effects on de-bouncing and FDC
While  enable  conditions  are  disabled,  de-bouncing  is  usually  stopped  as  well.  The  Dem
allows  configuring  whether  events  continue  de-bouncing  where  they  left  off,  or  whether
they start from the beginning – or even continue de-bouncing.
The point in time of the reset, being either when the enable conditions are disabled or re-
enabled, is also subject to configuration.
In  any  case,  it  is  not  possible for  events  to qualify  during  the  time  enable  conditions  (or
ControlDTCSetting) are disabled.
3.9
Storage Conditions
Up  to  255  storage  conditions  can  be  assigned  to  an  event.  If  the  assigned  storage
conditions  are  not  fulfilled,  the  respective  event  reported  via  Dem_SetEventStatus()
will change its status byte, but its environmental data and statistical data (e.g. most recent
failed event) is not stored or updated.
Also,  status bits  2,  3,  5  and  7  will  not  transition  while  storage  conditions are  not  fulfilled
(depending on configuration options, see chapter 3.4.4.1).
The storage condition state can be set via Dem_SetStorageCondition().
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Note
Unfulfilled storage conditions prevent event storage, not postpone it. When storage is
  re-enabled, in most configurations the blocked entries will require either a passed
failed transition or a transition of TestFailedThisOperationCycle in order to create a
memory entry.

3.10  DTC Suppression
AUTOSAR  provides  two  mechanisms  to  disable,  hide or  otherwise  prevent  evaluation  of
test reports. They differ in the impact of the suppression operation.
This  implementation  allows  calling  the  event  based  suppression  API  before  full
initialization,  and  calls  by  BSW  or  CDD  (i.e.  it  does  not  require  Rte_Call).  Please  be
advised that this is an extension to [1].

Note
Suppression / Availability states are not stored in non-volatile RAM – suppression must
  be (re)activated in each power cycle.

3.10.1  Event Availability
The  API  Dem_SetEventAvailable()  can  disconnect  the  event  reporting  from  event
processing.  Use  this  mechanism  in  case  the  ECU  has  fault  paths  that  are  supported
conditionally, e.g. due to ECU variants.
Unavailable  events  do  not  track  a  status.  They  cannot  confirm,  cannot  enter  the  event
memory, and attached DTCs are not reported to the outside world, i.e. through Dcm API.
Event reports and the request to suppress the same event do collide. In order to correctly
implement  suppression,  unused  DTCs  should  be  suppressed  before  the  monitor  in
question starts to report test results for it.

Caution
The FiM module prior to Autosar 4.2.1 is not able to work with unavailable events. It
  can cause runtime errors and/or FID status miscalculations when the FiM module tries
to request the event status of an unavailable event, since that request will return an
unexpected error code.

DTCs and events already stored in the event memory cannot be made unavailable and the
corresponding API call will fail.
For  combined  events,  the  DTC  will  be  hidden  only  after  all  events  attached  to  the  DTC
have been set to disabled.
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Note
A default setting for event availability can be defined. In this case, the API
  Dem_SetEventAvailable() may not be called before Dem initialization, as the active
configuration is not known
Also, the default setting cannot be used in conjunction with DemAvailabilityStorage

3.10.2  Suppress DTC
The suppression APIs only ‘hide’ DTCs to the outside world.
Event processing and storage are processed normally – this means suppressed DTCs can
use up memory slots, and enable indicators.

Note
DTC suppression is not possible before full initialization. Dem_MasterInit() is the API
  that selects the active configuration, so the mapping between EventId and DTC is not
known before then.

Changes
API Dem_SetEventSuppression is no longer supported. You can still suppress the DTC
  based on the EventId using Dem_GetDTCOfEvent()

3.11  Environmental Data
The  Dem  supports  storage  of  data  with  each  DTC  in  form  of  snapshot  records  and
extended data records.
A  Snapshot  Record  is  DTC  specific  and  consists  of  one  or  more  DIDs  (Data  Identifiers)
which  in  turn  consist  of  one  more  data  elements.  Snapshot  Records  are  collected  and
stored at a configurable point in time during event confirmation, and often multiple times.
An Extended Data Record is defined globally and consists of one or more data elements. It
is typically used for statistic values like the occurrence counter or aging counter that are
not frozen at storage time.
The content of data elements can be provided by the application or by the Dem itself.
For application defined data the Dem will request the data using callback functions every
time a new value needs to be stored, and supply the stored values to the reading module
(e.g.  the  Dcm).  This  type  of  data  is  comparable  to  snapshot  records  in  that  no  current
value can be supplied to a reader.
To use internal data provided by the Dem, data elements must be mapped by configuration
to the requested statistical value. The Dem will then always supply the current value of the
respective statistic to reading modules.
Figure 3-5 provides an example of the described layout.
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Snapshot Record Layout
DTC1 DID2 Data1
Data2
DID1
Data3
DTC2 DID3
Data2
Data4
DTCn DID3
Data2
Data4
DID4
Data5
Data6
Data7
Extended Data Record Layout
DTC1 Ext1 Aging Cnt
DTC2 Ext1 Aging Cnt
Ext10 Data8
Data9
DTCn Ext1 Aging Cnt
Ext2
Data10
Ext4
Data11

Figure 3-5  Environmental Data Layout
3.11.1  Storage Trigger
There  are  two  algorithms  how  snapshot  records  are  stored.  One  is  the  ‘calculated
snapshot number’ option, for which snapshots are currently stored with each transition of
the TestFailed bit of an event.
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ion or copying is subject to prior written approval by Vector.
Slide: 1
The ‘configured snapshot number’ option allows defining for each snapshot record in detail
when to store it, if its contents may be updated, and what its record number is going to be.
This  second  option  also  necessitates  defining  when  to  try  and  create  an  event  memory
entry, for there are some interesting combinations:
A failing DTC will (ideally) create the following triggers, in order:
1.  FDC threshold (< qualified failed) exceeded
2.  FDC qualifies, Bit 0 is set
3.  DTC Pending, Bit 2 is set
4.  DTC Confirmed, Bit 3 is set
Although in reality these can easily all occur at the same time.
Snapshots are stored and updated with each trigger, so e.g. if the snapshot trigger is ‘test
failed’, each of these events will update a corresponding snapshot record – once an event
memory entry is created for the DTC.
The  exact  trigger  that  is  used  to  create  a  memory  entry  is  set  with  option
DemGeneral/DemEventStorageTrigger.  This  way  you  can  realize  ECUs  that  i.e.  update
snapshot data with each Occurrence, but start only once the DTC reaches ConfirmedDTC.
3.11.1.1  Storage Trigger ‘FDC Threshold’
The storage of a snapshot prior to event qualification can be realized by Dem internal or
monitor  internal  debouncing.  For  an  event  using  a  Dem  internal  debouncing  algorithm
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threshold values need to be configured. In case of monitor internal debouncing calling API
Dem_SetEventStatus()
or
Dem_ReportErrorStatus()
with
DEM_EVENT_STATUS_FDC_THRESHOLD_REACHED  triggers  the  Dem  to  store  the
snapshot.

Caution
In case of monitor internal debouncing, snapshots with trigger ‘FDC Threshold’ are not
  stored or updated implicitly by monitor result DEM_EVENT_STATUS_FAILED.  To
achieve the initial storage or update, report the event with monitor result
DEM_EVENT_STATUS_FDC_THRESHOLD_REACHED first.

Caution
If an event cannot be stored due to a full event memory, another attempt is made only
  when the FDC threshold is crossed again. If the event’s FDC rests above the threshold
value, no attempt to store data is made, even if another event was cleared in the
meantime, e.g. by ClearDTC.

3.11.2  Internal Data Elements
The Dem provides access to the following values  by means of an internal data element.
Internal  data  is  usually  not  frozen  in  the  primary  memory,  but  rather  the  current  value  is
reported.
Aging counter
Available  both  in  positive  direction,  counting  up  from  0  (event  is  not  aging)  up  to  the
configured threshold value; and in reverse counting down to 0.
Healing counter
Available  both in  positive direction,  counting up from 0 (event  is not  healing), latching at
255; and in reverse counting down from the healing threshold (event is not healing) to 0.
The up-counting data element corresponds to ‘Cycles Tested Since Last Failed’ and is also
calculated for events without indicator.
The  Dem  bases  the  decision  whether  an  event  is  healing  on  status  ‘PendingDTC’  and
‘TestFailedSinceLastClear’.  The  healing  counter  is  only  available  if  these  status  bits  are
maintained for the DTC (i.e. the DTC is currently stored, or option ‘All DTC’ is used – see
chapter 3.4.4.1).
Otherwise,  the  event  is  not  considered  to be  healing  and  the  respective  healing  counter
value is reported (0 or healing threshold).
Occurrence counter
Counts  the  number  of  passed-failed  transitions  since  an  event  has  been  stored.  This
counter is available in 8bit and 16bit variants.
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Cycle counters
Different  statistics  concerning  the  number  of  operation  cycles:  The  number  of  cycles
completed  since  the  first  or  last  failed  result,  and  the  number  of  cycles  during  which  an
event has reported a failed result.
Overflow indication:
Indicates if the event’s memory destination has overflown.
Event priority:
Is set to the configured priority value of the event.
Significance:
Is set to the configured event significance value. Occurrence is 0, Fault is 1.
Root cause EventId
The  event  id  that  caused  the  storage/update  of  the environmental  data.  Can  be  used  in
context of the feature combined events to store the root cause event id.
OBD DTC
The OBD DTC for the event id that caused the storage/update of the environmental data. If
no OBD DTC is configured the returned value will be 0.
OBD Ratio
The  event  specific  numerator  and  denominator  values  if  the  event  has  a  ratio  attached
(see  [10]).  If  no  OBD is  supported  or  the  event  does  not  support a  ratio,  the  values  are
reported as 0. Ratios for combined events are also reported as 0.
To  support  ratios  in  extended  data  records  for  combined  events,  use  a  callback  with
EventId, and without NV storage instead. In this callback you can calculate the combined
ratio.
Fault Detection Counter statistics
The current fault detection counter can always map. For internally de-bounced events, the
maximum value per operation cycle, and the maximum value since last clear are available
as well.
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Caution
For time-based events, the maximum FDC in a cycle (or since last clear) are updated
  during the Dem task processing. This can result in a current FDC larger than the
displayed maximum FDC when the de-bouncing timer has just started.
This situation will correct itself after the timer has ticked once, but for low resolution
timing this can take up to the configured low resolution tick (which defaults to 150 ms).

3.11.3  External Data Elements
Data  is  collected  through  required  port  prototypes  and  needs  to  be  mapped  to  the  data
provider  during  Rte  configuration.  Please  note  that  each  data  element  has  its  own  port
interface and port prototype. It is not supported to collect a variety of DIDs or data signals
through a shared callback function by AUTOSAR design.
As a vendor specific extension, the MICROSAR Dem module supports Client/Server data
callbacks that also pass the EventId to the application. This allows scenarios not possible
with a standard Dem:
  Application managed data storage: e.g. connecting the Dem to legacy applications that
already store (parts of) the environment data.
  Event specific data contents: e.g. storing root cause dependent data.
3.11.3.1  NVRAM storage
The usual AUTOSAR Dem will store all data collected from the application in NVRAM.
For such data elements, data sampling is always processed on the Dem cyclic function.
Queries (e.g. through Dcm UDS diagnostic services) always return the frozen value.
As an extension to AUTOSAR, the Dem also allows  to configure data elements to return
‘live’ data. This is useful especially to support statistics data that is not already covered by
the Dem internal data elements.
When  data  elements  are  configured  not  to  be  stored  in  NVRAM,  the  data  is  requested
every  time  a  query  is  processed.  Their  implementation  should  be  reentrant  and  fast  to
allow diagnostic responses to complete in time.

Note
There is no way to tell the Dem that data is ‘not currently available’ in this case. The
  Autosar standard requires to substitute a ‘0xFF’ pattern in case a data callback returns
‘NOT OK’
Optional data is not possible, especially since a single DID or extended record may
consist of up to 255 callbacks, and optional data right in the middle of a DID makes no
sense.

3.12  Freeze Frame Pre-Storage
The  environmental  data  associated  with  a  DTC  is  collected  when  the  DTC  storage  is
processed  on  the  Dem  task  function.  The  delay  between  the  event  report  and  the  data
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collection can be a problem if fast changing data needs to be captured. In other use-cases
the DTC is supposed to store a snapshot of the system state some time before the event
qualification finishes.
Using  Dem_PrestoreFreezeFrame()  a  monitor  can  request  immediate  data  capture.  If
successful,  this  snapshot  is  used  as  the  data  source  if  the  DTC  is  stored  to  the  event
memory later on.
The Dem captures the following data, if relevant:
  A UDS snapshot record
  A OBD freeze frame
  J1939 freeze frame and expanded freeze frame

Caution
Extended data records are not captured.

The  Dem  can  only  pre-store  a  limited  number  of  events  (see  configuration  parameter
DemGeneral/DemMaxNumberPrestoredFF).  Once  the  provided  space  is  exhausted
subsequent pre-storage requests will fail until one or more of them are freed. It is always
possible to refresh a pre-stored data set already allocated to an event.
Pre-Stored data is not preserved after shutdown, and will be discarded automatically once
it is used or after a qualified test result has been processed for the respective event. Also
see Dem_ClearPrestoredFreezeFrame() for a way to explicitly discard stale data.
3.13  Combined Events
It is possible to combine the results of multiple monitors to a single DTC. This feature is
referred to as ‘Combined Events’ in this document.
Monitors  report  events  as  usual,  events  are  de-bounced  individually,  and  for  each  event
the Dem keeps track of its individual status byte. Only when a DTC status is required there
is a visible difference.
3.13.1  Configuration
Currently  the  configuration  format  allows  too  much  freedom  in  configuration  due  to  the
multiple combination types. For Type 1 combination the following restrictions apply:
  All events mapped to the same DTC must have identical environmental data
(extended records, number and content of snapshots etc.
  All events mapped to the same DTC must use the same cycles (operation, failing,
healing and aging cycles)
  All events mapped to the same DTC must use the same destination, significance,
priority, the same setting for ‘aging allowed’ and the same significance.
The behavior with mixed settings is undefined and not supported by this implementation.
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3.13.2  Event Reporting
Since  version  13.00.00  there  is  no  difference  between  combined  events  and  normal
events. Refer to 3.4.2 for additional information.
3.13.3  DTC Status
If  event  combination  is  used,  the  DTC  status  does  not  correspond  to  the  event  status
directly. Instead, the DTC status is derived from the status of multiple events.
As defined by Autosar (see [1]) this combined status is calculated according to Table 3-7.
Basically the DTC status is a simple OR combination of all events, with the resulting status
byte modified by an additional combination term. This is done such that a failed result will
also reset the ‘test not completed’ bits even if not all contributing monitors have completed
their test cycle.

Caution
A direct effect of event combination is a possible toggle of Bit 4 and Bit 6 during a
  single operation cycle. I.e. these bits can become set (test not completed  true) as
result of a completed test. This behavior is intended by Autosar and not an
implementation issue.
Applications need to take this into account when reacting on changes of ‘Test not
Completed This Operation Cycle / Since Last Clear’!

Combined DTC Status Bit

Bit 0 – TestFailed
OR (Event[i].Bit0)
Bit 1 – Test Failed This Operation Cycle
OR (Event[i].Bit1)
Bit 2 – PendingDTC
OR (Event[i].Bit2)
Bit 3 – ConfirmedDTC
OR (Event[i].Bit3)
Bit 4 – Test not Completed Since Last Clear
OR (Event[i].Bit4) AND NOT Bit5
Bit 5 – Test Failed Since Last Clear
OR (Event[i].Bit5)
Bit 6 – Test not Completed This Operation Cycle
OR (Event[i].Bit6) AND NOT Bit1
Bit 7 – Warning Indicator Requested
OR (Event[i].Bit7)
Table 3-7   DTC status combination
3.13.4  Environmental Data Update
Environment  data  and  statistics  are  calculated  based  on  the  DTC  status,  not  the  event
status of contributing events.
Example:  The  occurrence  counter,  if  configured,  is  not  incremented  with  each  failing
monitor.  Instead,  the occurrence  counter  is  incremented  each  time  Bit0  of the  combined
DTC transitions 0  1.
A failed monitor result might therefore not result in an update of event data (nor an event
data changed notification). This behavior is intentional.
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3.13.5  Aging
A combined DTC starts to age once the conditions discussed in chapter 3.6 are fulfilled for
each event, e.g. once all monitors have reported a ‘passed’ result.
3.13.6  Clear DTC
If  a  request  to  clear  a  combined  DTC  is  received,  all  monitors  that  define  a  ‘clear  DTC
allowed’  callback  will  be  notified  by  the  Dem  and  have  a  chance  to  prevent  the  clear
operation. If a single monitor disallows the clear operation, the DTC will be left in the event
memory.

Caution
If an application responds positively to a call to a ‘clear event allowed’ callback, the
  DTC is not necessarily cleared as a result!
Another monitor can be combined to the same DTC and disallow the clear operation.
Do not use a clear allowed callback as indication that a DTC was cleared, instead use
the InitMonitorForEvent notification!

3.14  Non-Volatile Data Management
The Dem uses the standard AUTOSAR data management facilities provided by the NvM
module.
3.14.1  NvM Interaction
If immediate data writes are enabled, the NvM needs to support API configuration class 2.
Otherwise the APIs provided by configuration class 1 are sufficient for Dem operation.
If  you  do  not  use  an  AUTOSAR  NvM  module,  you  have  to  provide  a  compatible
replacement  in order to use features related to non-volatile data management. The  NvM
module  needs  to  implement  at  least  the  functionality  described  in  chapter  4.5  NvM
Integration.
3.14.2  NVRAM Write Frequency
The Dem is designed to trigger as less NVRAM writes as possible. Thereto only the data
which  typically changes not  very often is stored during ECU runtime. The following table
will give you an overview of the NVRAM write frequency.
NVRAM Item

ntry

ata

E
e D
ntry
y
c
E
r

Data
Data
da
n i
un
ary
Write Frequency
us

on
dm
tat
mir
ec
A
S
Debo
P
S
At shutdown - always
  1  

At shutdown - if content has changed



  

1 Only in case of option DemOperationCycleStatusStorage is enabled
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NVRAM Item

ntry

ata

E
e D
ntry
y
c
E
r

Data
Data
da
n i
un
ary
Write Frequency
us

on
dm
tat
mir
ec
A
S
Debo
P
S
At clear DTC
        
Immediately - if immediate NVRAM storage is enabled

1  1
Immediately by Dem_RequestNvSynchronization() – if          
content has changed
Table 3-8   NVRAM write frequency
3.14.3  Data Recovery
As the Dem uses multiple NVRAM blocks to persist its data (refer to 4.5), it might happen
that  correlating  data  becomes  inconsistent  due  to  a  power  loss  or  an  NVRAM  error.  To
avoid  restoring  to  an  undefined  state,  during  initialization  some  errors  are  detected  and
corrected, as follows.
>  Duplicate entries in a memory are resolved by removing the older entry.
>  Stored-Only/Aging status bits are reset if the respective event is not stored, or aged.
>  Depending on aging behavior the status bits TestFailed, PendingDTC,
TestFailedThisOperationCycle and WarningIndicatorRequested, are reset for currently
aging events.
>  Reset status bit TestFailedThisOperationCycle if both TestFailedThisOperationCycle
and TestNotCompletedThisOperationCycle are set.
>  Reset status bit TestNotCompletedSinceLastClear if both TestFailedSincleLastClear
and TestNotCompletedSinceLastClear are set.
>  De-bounce counters are reset if they exceed the configured threshold, or the
TestFailed bit does not match a reached threshold (only relevant if de-bounce counters
are stored in NVRAM).
>  Stored Events have their status bit corrected if:
>  Events are stored when they reach an fault detection counter limit and if
>  A consecutive failed cycle counter is supported, and has a value > 0, status bits
PendingDTC and TestFailedSincleLastClear are set. If that counter also exceeds
the failure cycle counter threshold, the ConfirmedDTC status bit is set.
>  An occurrence counter is supported and has a value > 0, then status bit
TestFailedSincleLastClear is set.
>  Events are stored with other triggers

1 Immediate storage is restricted to changes caused by an occurrence, or initial storage.
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>  The status bit TestFailedSincleLastClear is set.
>  If a consecutive failed cycle counter is supported, and has a value > 0, the status bit
PendingDTC is set. If that counter also exceeds the failure cycle counter threshold,
the status bit ConfirmedDTC is set.
>  If the event has a failure cycle counter threshold of 0, the status bit ConfirmedDTC
is set.
>  If events are stored with trigger ConfirmedDTC, status bit ConfirmedDTC is set.
>  If a combined event is stored, but the EventId in NVRAM is not the 'master' EventId for
that combination group, the entry is discarded. This happens due to an integration
error, so also a DET error (inconsistent state) will be set.
>  If the event has no warning indicator configured but the status bit
WarningIndicatorRequested is set, then the status bit WarningIndicatorRequested is
reset.
3.15  Diagnostic Interfaces
To  provide  the  data  maintained  by  the  Dem  to  an  external  tester  the  Dem  supports
interfaces to the Dcm which are described in chapter 6.2.8.
Please note, these API are intended for use by the Dcm module exclusively and may not
be  safe  to  use  otherwise.  In  case  a  replacement  for  the  Dcm  module  has  to  be
implemented, we politely refer to the Autosar Dcm specification  [3], and do not elaborate
on the details within the context of this document.
3.16  Notifications
The  Dem  supports  several  configurable  global  and  specific  event  or  DTC  related
notification  functions  which  will  be  described  in  the  following.  For  details  please  refer  to
chapter 6.5.1.
Notification functions will only be called, if the Dem is fully initialized.
3.16.1  Monitor Status Changed
These are notifications for a monitor status change. With the given event ID the receiver is
able to identify what has changed.
>  General notification:
This callback function is called from Dem for each event on monitor status change.
3.16.2  Event Status Changed
These  are  notifications  for  an  event  status  change  independent  of  the  DTC  status
availability  mask. With  the  given  old  and new  status  the  receiver  is  able  to  identify  what
has changed.
>  General notification:
This callback function is called from Dem for each event on status change.
>  Event specific notifications:
Each event may have one or more of these callback functions which are called only if
the respective event status has changed.
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>  FIM notification:
This callback function is called for each event on status change. Dependent on the
given state the FIM is able to derive the new fault inhibition state.

Caution
The event status notifications are triggered from the Dem task function, not directly out
  of the context of the monitor.
There will be a delay of up to the Dem task cycle time between a monitor report
and the change notification.
This also affects the function permission calculation in the FiM module which is based
on the event status notification.

3.16.3  DTC Status Changed
These are notifications for a DTC status change. The DTC status availability mask is taken
into account, so status bits which are not supported will not cause a notification. It is also
possible that a changed event status does not change the resulting status of a combined
DTC.
>  Global notifications:
The configuration can define one or more of these callback functions which are called
only if the respective DTC status has changed.
>  Dcm notification:
This callback function is called for each DTC status change. Dependent on the given
state the Dcm is able to decide if a ROE message shall be sent.

Changes
Since version 13.00.00, API Dem_DcmControlDTCStatusChangedNotiﬁcation is
  no longer supported and notifications are called always unless caused by ClearDTC.
To achieve the behavior of earlier versions, disable Dcm notifications and configure the
Dcm callback function as generic C callback:
DemGeneral/DemTriggerDcmReports = False
DemGeneral/DemCallbackDTCStatusChanged/DemCallbackDTCStatusChangedFnc =
<Symbol of Dcm notification function>
DemGeneral/DemHeaderFileInclusion =
<Header file declaring the Dcm notification function>

3.16.4  Event Data Changed
These notifications will be called from Dem if the data related to an event has changed.
>  General notification:
This is a single callback function which is called for each event on data change.
>  Event specific notification:
Each event may have one callback function which is called on event data change.
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3.16.5  Monitor Re-Initialization
These notifications are  called from  Dem,  to signal  to diagnostic monitors  that a new test
result is now requested. This can happen due to clearing the fault memory, the start of a
new  operation  cycle,  or  the  re-enabling  of  previously  disabled  DTC  settings  or  enable
conditions
The set of notification calls is fully customizable in the configuration.
>  Event specific notification:
Each event may have one callback function which is called for the reasons mentioned
above.
>  Function specific notifications:
Each event may have one or more of this callback functions which is called for the
reasons mentioned above.
For combined events, this callback is notified for each event if they are re-enabled by
enable conditions.
3.16.6  ClearDTC Notification
These  notifications  will  be  called  from  the  Dem  task  function  either  before  of  after
processing the clear request. This is configurable per notification.
>  Before a clear request is started, i.e. before any DTC is modified or a ClearAllowed
callbacks is invoked.
>  After a clear request has finished. This is either after all DTCs have been reset in
RAM, or after the cleared NV information was persisted by the NvM. The notification
will be triggered before Dcm can send a response.
3.17  Indicators
An  event  can  be  configured  to  have  one  or  more  indicators  assigned.  An  indicator  is
reported  active  if  at  least  one  assigned  event  requests  it,  and  cleared  when  all  events
assigned  to  it  have  revoked  their  warning  indicator  request  (i.e.  by  healing  or  diagnostic
service ClearDtc).
The indicator status is set always with event confirmation (set condition of bit 3), and reset
after the configured number of operation cycles during which the event was tested, but not
tested failed.
An event’s warning indicator request status is reported in bit 7 of the UDS status byte.
3.17.1  User Controlled WarningIndicatorRequest
Use  cases  that  demand  setting  of  the  UDS  Bit  7  (WarningIndicatorRequest)  differently
from  the  normal  indicator  handling  can  be  met  using  the  operation  SetWIRStatus  (see
chapter 6.6.1.1.9).
Examples include resetting the WIR  bit only with the next power cycle after the indicator
status has healed, or setting it with the first failed result instead of the ‘confirmedDTC’ bit.
This  interface  also  allows  controlling  Bit7  of  a  BSW  error.  There  is  only  a  SWC  API
available to control the WIR status bit of BSW errors, so a SWC module has to be used for
this task in all cases.
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To calculate the visible status of Bit 7, the ‘normal’ monitor WIR request is logically OR’ed
to the user controlled state as depicted in Figure 3-6.

Note
UDS  DTC  status  change  notifications  are  called  only  if  the  combined  (User
  Controlled  +  Indicator)  status  changes.  In  case  more  detailed  information  is
needed a SWC can use the operation GetWIRStatus in combination with event
status notifications.

Figure 3-6  User Controlled WarningIndicatorRequest
3.18  Interface to the Runtime Environment
The  Dem  interacts  with  the  application  through  the  Rte  and  defined  port  interfaces  (see
chapter 6.6).
There are no statically defined callouts that need to be implemented by the application. All
notifications and callouts are set up during configuration.
This  is  why  the  Dem software  component  description  file  (Dem_swc.arxml)  is  generated
based on the configuration.
3.19  Error Handling
3.19.1  Development Error Reporting
By  default,  development  errors  are  reported  to  the  Det  using  the  service
Det_ReportError()  as  specified  in  [2],  if  development  error  reporting  is  enabled  (i.e.
pre-compile parameter Dem_DEV_ERROR_DETECT==STD_ON).
If  another  module  is  used  for  development  error  reporting,  the  function  prototype  for
reporting the error can be configured by the integrator, but must have the same signature
as the service Det_ReportError().
The reported Dem ID is 54.
The  reported  service  IDs  identify  the  services  which  are  described  in  6.2.  The  following
table presents the service IDs and the related services:
Service ID
Service
0x00
Dem_GetVersionInfo()
0x01
Dem_PreInit()/Dem_MasterPreInit()
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Service ID
Service
0x02
Dem_Init()/Dem_MasterInit()
0x03
Dem_Shutdown()
0x04
Dem_SetEventStatus()
0x05
Dem_ResetEventStatus()
0x06
Dem_PrestoreFreezeFrame()
0x07
Dem_ClearPrestoredFreezeFrame()
0x08
Dem_SetOperationCycleState()
0x09
Dem_ResetEventDebounceStatus()
0x0A
Dem_GetEventUdsStatus()
0x0B
Dem_GetEventFailed()
0x0C
Dem_GetEventTested()
0x0D
Dem_GetDTCOfEvent()
0x0E
Dem_GetSeverityOfDTC()
0x0F
Dem_ReportErrorStatus()
0x11
Dem_SetAgingCycleState
0x12
Dem_SetAgingCycleCounterValue
0x13
Dem_SetDTCFilter()
0x15
Dem_GetStatusOfDTC()
0x16
Dem_GetDTCStatusAvailabilityMask()
0x17
Dem_GetNumberOfFilteredDTC()
0x18
Dem_GetNextFilteredDTC()
0x19
Dem_GetDTCByOccurrenceTime()
0x1A
Dem_DisableDTCRecordUpdate()
0x1B
Dem_EnableDTCRecordUpdate()
0x1C
Dem_DcmGetOBDFreezeFrameData()
0x1D
Dem_GetNextFreezeFrameData()
0x1F
Dem_GetSizeOfFreezeFrameSelection()
0x20
Dem_GetNextExtendedDataRecord()
0x21
Dem_GetSizeOfExtendedDataRecordSelection()
0x23
Dem_ClearDTC()
0x24
Dem_DisableDTCSetting()
0x25
Dem_EnableDTCSetting()
0x29
Dem_GetIndicatorStatus()
0x32
Dem_GetEventMemoryOverflow()
0x33
Dem_SetDTCSuppression()
0x34
Dem_GetFunctionalUnitOfDTC()
0x35
Dem_GetNumberOfEventMemoryEntries()
0x37
Dem_SetEventAvailable()
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Service ID
Service
0x38
Dem_SetStorageCondition()
0x39
Dem_SetEnableCondition()
0x3A
Dem_GetNextFilteredRecord()
0x3B
Dem_GetNextFilteredDTCAndFDC()
0x3C
Dem_GetTranslationType()
0x3D
Dem_GetNextFilteredDTCAndSeverity()
0x3E
Dem_GetFaultDetectionCounter()
0x3F
Dem_SetFreezeFrameRecordFilter()
0x40
Dem_DltGetAllExtendedDataRecords
0x41
Dem_DltGetMostRecentFreezeFrameRecordData
0x51
Dem_SetEventDisabled
0x52
Dem_DcmReadDataOfOBDFreezeFrame
0x53
Dem_DcmGetDTCOfOBDFreezeFrame
0x55
Dem_MainFunction()/Dem_MasterMainFunction()
0x61
Dem_DcmReadDataOfPID01
0x63
Dem_DcmReadDataOfPID1C
0x64
Dem_DcmReadDataOfPID21
0x65
Dem_DcmReadDataOfPID30
0x66
Dem_DcmReadDataOfPID31
0x67
Dem_DcmReadDataOfPID41
0x68
Dem_DcmReadDataOfPID4D
0x69
Dem_DcmReadDataOfPID4E
0x6A
Dem_DcmReadDataOfPID91
0x6B
Dem_DcmGetInfoTypeValue08
0x6C
Dem_DcmGetInfoTypeValue0B
0x6D
Dem_GetEventExtendedDataRecordEx()
0x6E
Dem_GetEventFreezeFrameDataEx()
0x71
Dem_RepIUMPRDenLock
0x72
Dem_RepIUMPRDenRelease
0x73
Dem_RepIUMPRFaultDetect
0x79
Dem_SetPtoStatus
0x7A
Dem_SetWIRStatus()
0x90
Dem_J1939DcmSetDTCFilter()
0x91
Dem_J1939DcmGetNumberOfFilteredDTC ()
0x92
Dem_J1939DcmGetNextFilteredDTC()
0x93
Dem_J1939DcmFirstDTCwithLampStatus()
0x94
Dem_J1939DcmGetNextDTCwithLampStatus ()
0x95
Dem_J1939DcmClearDTC()
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Service ID
Service
0x96
Dem_J1939DcmSetFreezeFrameFilter()
0x97
Dem_J1939DcmGetNextFreezeFrame()
0x98
Dem_J1939DcmGetNextSPNInFreezeFrame()
0x99
Dem_J1939DcmSetRatioFilter
0x9A
Dem_J1939DcmGetNextFilteredRatio
0x9B
Dem_J1939DcmReadDiagnosticReadiness1
0x9C
Dem_J1939DcmReadDiagnosticReadiness2
0x9D
Dem_J1939DcmReadDiagnosticReadiness3
0x9E
Dem_GetOperationCycleState
0x9F
Dem_GetDebouncingOfEvent()
0xA2
Dem_SetDTR
0xA3
Dem_DcmGetAvailableOBDMIDs
0xA4
Dem_DcmGetNumTIDsOfOBDMID
0xA5
Dem_DcmGetDTRData
0xAA
Dem_SetPfcCycleQualified
0xAE
Dem_SetIUMPRDenCondition
0xB2
Dem_DcmGetDTCSeverityAvailabilityMask
0xB3
Dem_ReadDataOfPID01
0xB4
Dem_GetB1Counter
0xB5
Dem_GetMonitorStatus()
0xB7
Dem_SelectDTC()
0xB8
Dem_GetDTCSelectionResult()
0xB9
Dem_SelectFreezeFrameData()
0xBA
Dem_SelectExtendedDataRecord()
Table 3-9 Service IDs
Table 3-10 presents the service IDs of APIs not defined by AUTOSAR, the related services
and corresponding errors:
Service ID
Service
0xD0
Dem_InitMemory()
0xD1
Dem_PostRunRequested()
0xD2
Dem_GetEventEnableCondition()
0xD3
Dem_GetWIRStatus()
0xD4
Dem_EnablePermanentStorage()
0xD5
Dem_GetIUMPRGeneralData()
0xD7
Dem_GetNextIUMPRRatioDataAndDTC()
0xD8
Dem_GetCurrentIUMPRRatioDataAndDTC()
0xD9
Dem_GetPermanentStorageState()
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Service ID
Service
0xDA
Dem_IUMPRLockNumerators()
0xDB
Dem_RequestNvSynchronization()
0xDC
Dem_GetEventAvailable()
0xDD
Dem_SetIUMPRFilter()
0xDE
Dem_GetNumberOfFilteredIUMPR()
0xDF
Dem_UpdateAvailableOBDMIDs()
0xF1
Dem_NvM_InitAdminData()
Dem_NvM_InitStatusData()
Dem_NvM_InitDebounceData()
Dem_NvM_InitEventAvailableData()
Dem_NvM_InitObdFreezeFrameData()
Dem_NvM_InitObdIumprData()
Dem_NvM_InitDtrData()
0xF2
Dem_NvM_JobFinished()
0xF3
Dem_SetHideOBDOccurrences()
0xF4
Dem_GetHideOBDOccurrences()
0xF5
Dem_SatellitePreInit()
0xF6
Dem_SatelliteInit()
0xF7
Dem_SatelliteMainFunction()
0xF8
Dem_GetEventIdOfDTC()
0xF9
Dem_GetDTCSuppression()
0xFF
Internal functions without dedicated API Id
Table 3-10   Additional Service IDs
The errors reported to Det are described in the following table:
Error Code
Description
0x10  DEM_E_PARAM_CONFIG
Service was called with a parameter value which is
not allowed in this configuration
0x11  DEM_E_PARAM_POINTER
Service was called with a NULL pointer argument
0x12  DEM_E_PARAM_DATA
Service was called with an invalid parameter value
0x13  DEM_E_PARAM_LENGTH
Service was called with an invalid length or size
parameter
0x20  DEM_E_UNINIT
Service was called before the Dem module has been
initialized
0x30  DEM_E_NODATAAVAILABLE
Data collection failed (application error)
0x40  DEM_E_WRONG_CONDITION
Service was called with unsatisfied precondition
0xF0  DEM_E_INCONSISTENT_STATE  Dem is in an inconsistent internal state
Table 3-11   Errors reported to Det
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3.19.1.1  Parameter Checking
AUTOSAR requires that API functions check the validity of their parameters. These checks
are for development error reporting and are en-/disabled together with development error
reporting.

Caution
If the Dem is used in Pre-Compile variant, Dem_MasterPreInit() does not verify the
  initialization pointer. This pointer is unused anyways, so we deviate from [1] in order to
be more in line with most other Autosar modules.

3.19.1.2  SilentBSW run-time checks
The Dem module provides several run-time checks to prevent memory corruption caused
by inconsistent NV data. These checks are active only when enabled by configuration.
Most of the Dem state is preserved in NV memory, so inconsistencies introduced into the
NV  state  would  accumulate. The  result  would  be  misbehavior  at  a  much  later  time,  e.g.
multiple power cycles after the actual error occurred. To prevent this, the Dem will enter an
error state once a run-time check fails. In this error state, most API functions will return an
error code and return immediately without effect.
To  check  for  the  operational  state  of  the  Dem  module,  you  have  access  to  the  global
variable  Dem_LineOfRuntimeError.  It  will  be  set  to  0  during  normal  operation.  If  a  run-
time check fails, the variable will be set to the code line on which the error had occurred. In
addition, a DET error is reported, assuming DET reporting is enabled by configuration.
The only way to recover from the Dem error state is an ECU reset.
3.19.2  Production Code Error Reporting
The Dem does not report any production code related errors.
Production  code  errors  in  general  are  errors  which  shall  be  saved  through  the  Dem  by
definition. Errors of Dem itself occurring during normal operation are not saved as DTC.
3.20  J1939

Note
Dependent on the licensed components of your delivery the feature J1939 may not be
  available in DEM.

In  general  the  SAE  J1939  communication  protocol  was  developed  for  heavy-duty
environments but is also applicable for communication networks in light- and medium-duty
on-road and off-road vehicles.
J1939 does not describe how the fault memory shall behave but how to report the faults
and their related data.
With  the  interface  described  in  chapter  6.2.9  the  following  diagnostic  messages  can  be
supported:
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Diagnostic Message
DM1 – Active Diagnostic Trouble Codes
DM2 – Previously Active Diagnostic Trouble Codes
DM3 – Diagnostic Data Clear/Reset Of Previously Active DTCs
DM4 – Freeze Frame Parameters
DM5 – Diagnostic Readiness 1
DM11 – Diagnostic Data Clear/Reset of Active DTCs
DM25 – Expanded Freeze Frame
DM27 – All Pending DTCs
DM31 – DTC To Lamp Association
DM35 – Immediate Fault Status
DM53 – Active Service Only DTCs
DM54 – Previously Active Service Only DTCs
DM55 – Diagnostic Data Clear/Reset for All Service Only DTCs
Table 3-12   Diagnostic messages where content is provided by Dem
3.20.1  J1939 Freeze Frame and J1939 Expanded Freeze Frame
With  J1939  enabled,  the  Dem  supports  two  globally  defined  J1939  specific  freezes  in
addition to the environmental data described in chapter 3.11. Each DTC can be configured
individually to support freeze frame and/or expanded freeze frame, or none.
The  J1939  (expanded)  freeze  frame  data  is  stored  when  the  DTC  becomes  active
(ConfirmedDTC  1) and is not updated if the DTC reoccurs.
These freeze frames are stored in addition to any configured ‘standard’ freeze frames but
they are not mapped into a UDS snapshot record.
3.20.2  Indicators
In addition to the ‘normal’ indicators (refer to 3.17) a J1939 related DTC may support up to
one of the J1939 specific indicators listed below.
>  Red Stop Lamp (RSL)
>  Amber Warning Lamp (AWL)
>  Protect Lamp (PL)
These indicators use different behavior settings, as required for J1939. These settings are
valid for the indicators mentioned above:
>  Continuous
>  Fast Flash
>  Slow Flash
Differently  from  the  ‘normal’  AUTOSAR  indicators,  Dem_GetIndicatorStatus()  returns  a
prioritized result if multiple events request the same indicator with different behavior. E.g.
the  PL  is  triggered  at  the  same  time  as  “Continuous”  and  “Fast  Flash”,  the  behavior  is
indicated as “Continuous”.
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DTC  and  event  suppression  (refer  to  chapter  3.10.2)  with  DTC  format  set  to  J1939  the
configured  indicator  is  not  applied  to  the  ECU  indicator  state.  I.e.  the  API
Dem_GetIndicatorStatus()  will  return  the  same  result  whether  DTCs  are  suppressed  or
not. To match this behavior, the network management node ID related indicator status also
reports the indicator state of suppressed DTCs.
3.20.3  Clear DTC
In contrast to the clear process defined by UDS which provides the DTC itself or the group
of  DTCs  that  shall be cleared,  the  J1939  Clear  DTC  command provides  the  DTC  status
that must match the available J1939 DTCs to be cleared.
DTCs with the following DTC status can be cleared:
DTC Status

TestFailed (Bit0) == 1
Active
AND
ConfirmedDTC (Bit3) == 1
TestFailed (Bit0) == 0
Previously Active
AND
ConfirmedDTC (Bit3) == 1
Table 3-13   J1939 DTC Status to be cleared

Caution
Events without a DTC number cannot be cleared using the J1939 API as they do not
  support the ConfirmedDTC status.

3.20.4  Service Only DTCs
Service  Only  diagnostic  trouble  codes  are  DTCs  that  do  not  use  an  indicator  and  are
stored in secondary memory. These DTCs are accessed by DMs 53-55.
3.21  Clear DTC APIs
The clear DTC operations are implemented in full accordance with [1].
Please be aware that the <xxx>ClearDTC interfaces start an asynchronous clear process.
While  one  clear  operation  is  in  progress,  clear  requests  from  different  clients  receive  a
DEM_CLEAR_BUSY response (see chapters 6.2.6.28 and 6.2.9.1 for details).

Caution
The Dem will allow a clear request for a different client as soon as the previous clear
  operation is finished, but before the final result of the previous clear operation is
retrieved (Figure 3-7).

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sd Clear DTC
Client 1
Client 2
Dem
ClearDTC()
Clear
start()
Operation
:DEM_PENDING
ClearDTC()
clear operation for client 2
is started
:DEM_PENDING
Polling call for the first
clear request: clear
ClearDTC()
operation is in progress
:DEM_CLEAR_BUSY
finish()
clear request is rejected as
clear operation for client 2 is
in progress
ClearDTC()
Clear
start()
Operation
:DEM_PENDING
Polling call for first clear
ClearDTC()
clear request is allowed as
request: final result for
clear operation for client 2 is
clear operation is retrieved
finished --> clear operation for
:E_OK
client 1 is started
ClearDTC()
clear request is rejected as
clear operation for client 1
is in progress
:DEM_CLEAR_BUSY
finish()
ClearDTC()
:E_OK
Polling call for second clear
request: final result for clear
operation is retrieved

Figure 3-7 Concurrent Clear Requests
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4  Integration
This chapter gives necessary information for the integration of the MICROSAR  Dem into
an application environment of an ECU.
4.1
Scope of Delivery
The delivery of the Dem contains the files which are described in the chapters  4.1.1 and
4.1.2:
4.1.1
Static Files
File Name
Source
Object
Description
Code
Code
Delivery  Delivery
Dem.c
This is the source file of the Dem. It


contains the main functionality of the
Dem.
Dem.h
This header file provides the Dem API
functions for BSW modules and the


application. This file is supposed to be
included by client modules but not by
Dcm.
Dem_Dcm.h
This header file provides the Dem API


functions for the Dcm. This file is
supposed to be included by Dcm.
Dem_J1939Dcm.h
This header file provides the Dem API


functions for the J1939Dcm. This file is
supposed to be included by J1939Dcm.
Dem_Types.h
This header file contains all Dem data


types. Do not include this file directly, but
include Dem.h instead.
Dem_Cbk.h
This header file contains callback
functions intended for the NvM module.


Include this in the NvM configuration for
the declarations of the initialization and
notification functions.
Dem_Validation.h
This header file contains static
configuration checks. Inconsistent


configuration settings will trigger #error
directives within this file.
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File Name
Source
Object
Description
Code
Code
Delivery  Delivery
Dem_Cdd_Types.h
This header file contains all types that are
supposed to be generated by the Rte.


In case no Rte is used, this file is included
instead of Rte_Dem_Type.h. Otherwise,
this file is not used at all.
Dem_Cfg_Types.h
Internal header file, do not include directly

Dem_Cfg_Macros.h



Dem_Cfg_Declarations.h
Internal header file, do not include directly
Dem_Cfg_Definitions.h
Dem_MemCopy.h
Dem_Int.h

Dem_<*>_Fwd.h

Dem_<*>_Types.h
Dem_<*>_Interface.h
Dem_<*>_Implementation.h
_Dem_MemMap.h
Template header for memory mapping,


see chapter 4.3.2
Dem_bswmd.arxml
This file contains the definition of all Dem


configuration parameters.
Table 4-1   Static files
4.1.2
Dynamic Files
The dynamic files are generated by the configuration tool Cfg5.
File Name
Description
Dem_Cfg.h
This header file contains the configuration switches of the Dem.
Dem_Lcfg.c
This source file contains configuration values and tables of the
Dem.
Dem_Lcfg.h
This header file provides access functions to the Dem for the
configuration values and tables.
Dem_PBcfg.c
This source file contains post-buildable configuration
values/tables of the Dem.
For easier handling, this file is created in pre-compile
configurations as well. If your build environment produces error
messages due to this file not defining any symbols, feel free to
exclude it from the build.
Dem_PBcfg.h
This header file provides access functions to the Dem for the
post-buildable configuration values and tables.
Dem_AdditionalIncludeCfg.h
This header file provides additional include files specified by the
user with the configuration parameter
DemGeneral/DemHeaderFileInclusion
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File Name
Description
Dem_Swc.h
Internal header file, do not include directly.
RTE generated callback prototypes or DEM internal substitution
Dem_Swc_Types.h
Internal header file, do not include directly.
RTE generated Dem types or DEM internal substitution.
Dem_swc.arxml
This AUTOSAR xml file is used for the configuration of the Rte. It
contains the information to get prototypes of callback functions
offered by other components.
Table 4-2 Generated files
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4.2
Include Structure
class IncludeStructure
Dem_MemMap.h
FiM.h
Det.h
SchM_Dem.h
EcuM_Error.h
MemMap.h
J1939Dcm.h
(template)
«include»
Os.h
Dcm.h
vstdlib.h
Dlt.h
NvM.h
J1939Nm.h Dem_AdditionalIncludeCfg.h
«include»
«include»
«include»
«include»
«include»
«include»
Dem_<Internal_Header_Files>.h
Dem.c
Dem_Swc.h
«include»
Rte_DemMaster_NN.h
«include»
«include»
«include»
«include»
[useRTE]
«include»
[useRTE]
«include»
Rte_DemMaster_NN_Type.h
Dem_Cfg_Types.h
Dem_Dcm.h
Dem_J1939Dcm.h
Dem_Cbk.h
«include»
[useRTE]
«include»
«include»
«include»
«include»
«include»
«include»
«include»
[noRTE]
Dem_Cfg_Macros.h
Dem_Validation.h
Dem.h
Dem_Types.h
Dem_Swc_Types.h
Dem_Cdd_Types.h
«include»
«include»
«include»
«include»
«include»
«include»
«include»
«include»
Dem_Lcfg.h
Dem_PBcfg.h
Dem_Cfg.h
Std_Types.h
«include»
«include»
Dem_Int.h
Dem_PBcfg.c
Dem_Lcfg.c
«include»

Figure 4-1  Include structure
4.3
Compiler Abstraction and Memory Mapping
The  objects  (e.g.  variables,  functions,  constants)  are  declared  by  compiler  independent
definitions  –  the  compiler  abstraction  definitions.  Each  compiler  abstraction  definition  is
assigned to a memory section.
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The  following  table  contains  the  memory  section  names  and  the  compiler  abstraction
definitions of the Dem and illustrates their assignment among each other.
Compiler Abstraction
T
Definitions
S

N

T
RM
CO
P
G

DE
NS
L_
L_
P
CF
Memory Mapping
P
B

_CO
_CO
_CA
_A
_P
Sections
M
M
M
M
M
DE

DE

DE

DE

DE
DEM_START_SEC_CODE



DEM_STOP_SEC_CODE
DEM_START_SEC_CONST_<size>



DEM_STOP_SEC_CONST_<size>
DEM_START_SEC_CALIB_<size>



DEM_STOP_SEC_CALIB_<size>
DEM_START_SEC_PBCFG


DEM_STOP_SEC_PBCFG
DEM_START_SEC_PBCFG_ROOT


DEM_STOP_SEC_PBCFG_ROOT
Table 4-3   Compiler abstraction and memory mapping, constant sections

Compiler Abstraction

D

Definitions
A

HE
T
IT
C

A
A

A

T
A
A
T
IT
IN
CA
T
A
T
A

A
D
D_D
_DA
D
E
R
Memory Mapping
L_

R_IN
R_NO
R_UN
M_
_D
T
P
A
A
A
A
P
H
Sections
_V
_V
_V
_DCM
_NV
_DL
_A
_S
M
M
M
M
M
M
M
M
DE

DE

DE
DE

DE

DE

DE

DE
DEM_START_SEC_VAR_NO_INIT_<size>




DEM_STOP_SEC_VAR_NO_INIT_<size>
DEM_START_SEC_VAR_INIT_<size>



DEM_STOP_SEC_VAR_INIT_<size>
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DEM_START_SEC_VAR_SAVED_ZONE0_<size>




DEM_STOP_SEC_VAR_SAVED_ZONE0_<size>
DEM_START_SEC_<OS_APPLICATION_NAME>_VAR_NO
INIT_UNSPECIFIED
DEM_STOP_SEC_<OS_APPLICATION_NAME>_VAR_NOI



NIT_UNSPECIFIED
DEM_START_SEC_0_VAR_NOINIT_UNSPECIFIED
DEM_STOP_SEC_0_VAR_NOINIT_UNSPECIFIED
DCM diagnostic buffer (section depends on DCM




implementation)
Application or RTE buffer used in port communication



(section depends on configuration and port mapping)
Table 4-4   Compiler abstraction and memory mapping, variable sections
4.3.1
Copy Routines
By  default,  the  Dem  implementation  uses  the  copy  routines  provided  by  the  Vector
standard  library  (VStdLib).  Its  copy  routines  are  aware  of  the Autosar  Memory  Mapping
feature, and will work independently from the chosen mapping.
If the Dem module is not integrated into a MICROSAR 4 environment, the VstdLib module
might not be available, or not be enabled to support Autosar Memory Mapping.
In  this  case,  you  can  disable  the  use  of  VstdLib  (Configuration  option  DemGeneral/
DemUseMemcopyMacros). The Dem provides a simple copy routine based on a for-loop,
which is used as default replacement for the VstdLib implementation.
If necessary, you can also replace this default implementation. To do so, simply provide a
specialized definition of the following macros, e.g. globally, or in a user-config file:
Dem_MemCpy_Macro(destination_ptr, source_ptr, length_in_byte)
Dem_MemSet_Macro(destination_ptr, value_byte, length_in_byte)
4.3.2
Memory Map with multiple partitions
With  only  a  single  partition,  the  Dem  implementation  can  work  with  the  default  memory
map  defined  in  file  ‘_Dem_MemMap.h’.  To  use  this  file,  you  need  to  first  rename  it  to
‘Dem_MemMap.h’
With  each  configured  DemSatellite  instance  (see  configuration  containers  /Os/Os-
Application  that  are  referenced  from  DemGeneral/DemOsApplicationRef,
DemGeneral/DemMasterOsApplicationRef
and
DemEventParameter/Dem-
EventOsApplicationRef),  you  need  to  extend  the  memory  map  of  the  Dem  with  a
preprocessor directive corresponding to the name of the related OsApplication. At the end
of file ‘_Dem_MemMap.h’ you will find a commented section mapping – you can copy this
template  into  your  ‘Dem_MemMap.h’  file,  un-comment  it,  and  adapt  it  to  match  each
OsApplication instance.
4.4
Synchronization
The Dem uses two mechanisms to maintain data consistency.
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Where  possible,  the  Dem  uses  a  synchronization  method  based  on  atomic
compare/exchange. Otherwise, the Dem relies on a critical section mechanism.
4.4.1
Atomic Compare/Exchange
Most  hardware  platforms  supply  instructions  for  efficient  synchronization  –  test-and-set,
compare-exchange or similar features.
During integration, a suitable method for synchronization can be provided, e.g. based on a
compiler  intrinsic,  or  by  a  short  inline  function  implementing  the  compare-exchange
behavior  using  the  mechanism  provided  by  the  hardware  platform  and  compiler  (see
chapter 6.5.1.14).
As  a  fallback,  the  Dem  supplements  a  default  implementation  using  a  critical  section.
While using this default implementation will achieve data consistency, it requires a critical
section that guarantees atomicity across all processor cores. In multi-core environments,
usage of this default implementation is discouraged due to the incurred overhead.
4.4.2
Critical Sections
The Dem uses the Critical Section implementation of the SchM.
4.4.2.1
Exclusive Area 0
DiagMonitor
Purpose:
Ensures data consistency between the Diagnostic Monitors and the Dem task.
Interfaces:
>  SchM_Enter_Dem_DEM_EXCLUSIVE_AREA_0
>  SchM_Exit_Dem_DEM_EXCLUSIVE_AREA_0

Runtime:
Short runtime; The runtime will increase if J1939 nodes are used.

Dependency:
>  Dem_MainFunction()
>  Dem_ReportErrorStatus()
>  Dem_SetEventStatus()
>  Dem_GetIndicatorStatus()
>  Dem_SetWIRStatus()
>  Dem_SetEventAvailable()
>  Dem_SetDTCSuppression()
>  Dem_RepIUMPRFaultDetect()1
>  Dem_RepIUMPRDenLock()1
>  Dem_RepIUMPRDenRelease()1
>  Dem_SetIUMPRDenCondition()1

1 API may not be part of the delivery as its availability depends on the DEM license.
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DiagMonitor
>  Dem_SetDTR()
>  Dem_DcmGetDTRData()

Recommendation:
This critical section may be called from any BSW and CDD, and even before the system is fully
initialized.
Table 4-5   Exclusive Area 0
4.4.2.2
Exclusive Area 1
StateManager
Purpose:
Ensures data consistency in case of preempted execution between application state managers
and Dem task.
Interfaces:
>  SchM_Enter_Dem_DEM_EXCLUSIVE_AREA_1
>  SchM_Exit_Dem_DEM_EXCLUSIVE_AREA_1

Runtime:
short runtime, sparse usage

Dependency:
>  Dem_MainFunction()
>  Dem_SetOperationCycleState()
>  Dem_SetEnableCondition()
>  Dem_SetStorageCondition()
>  Dem_DisableDTCSetting()
>  Dem_EnableDTCSetting()
>  Dem_SetPfcCycle()1

Recommendation:
No recommendation.
Table 4-6   Exclusive Area 1
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4.4.2.3
Exclusive Area 2
DcmApi
Purpose:
Protects global state data and values used to track Dcm related tasks from concurrent
modification.

Interfaces:
>  SchM_Enter_Dem_DEM_EXCLUSIVE_AREA_2
>  SchM_Exit_Dem_DEM_EXCLUSIVE_AREA_2

Runtime:
short runtime, sparse usage

Dependency:
>  Dem_MainFunction()
>  Dem_EnablePermanentStorage()1
Recommendation:
No recommendation.
Table 4-7   Exclusive Area 2
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4.4.2.4
Exclusive Area 3
CrossCoreComm
Purpose:
Protects global state data from concurrent modification.
Interfaces:
>  SchM_Enter_Dem_DEM_EXCLUSIVE_AREA_3
>  SchM_Exit_Dem_DEM_EXCLUSIVE_AREA_3

Runtime:
short runtime, very frequent usage

Dependency:
>  Dem_SatelliteInit() (*)
>  Dem_MasterMainFunction()
>  Dem_SatelliteMainFunction() (*)
>  Dem_ReportErrorStatus() (*)
>  Dem_SetEventStatus() (*)
>  Dem_ResetEventStatus() (*)
>  Dem_ResetEventDebounceStatus() (*)
>  Dem_SetEventAvailable() (*)
>  Dem_SetDTR()1 (*)
>  Dem_PrestoreFreezeFrame()
>  Dem_ClearPrestoredFreezeFrame()
Recommendation:
This critical section must synchronize across multiple processor cores, so it must be mapped to
an adequate mechanism.
Additionally, provide a platform specific CompareAndSwap (see chapter 4.4.1).

(*) The critical section is only used if the default CompareAndSwap algorithm is NOT
substituted with a platform specific implementation.

4.5
NvM Integration
In  general,  the  Dem  module  is  designed  to  work  with  an Autosar  NvM  to  provide  non-
volatile data storage.
It  is  expected  that  all  NV  blocks  used  by  the  Dem  are  configured  with  the  parameters
detailed in the following chapters:
>  RAM buffer
>  Initialization method: ROM element or initialization function
>  Single block job end notification
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>  Enabled for both WriteAll and ReadAll
When using a non-Autosar NV manager, please also refer to the Autosar SWS of the NvM
module for more details on the expected behavior.
4.5.1
NVRAM Demand
All non-volatile data blocks used by the Dem must be configured to match the size of the
underlying  type.  Since  the  actual  size  depends  on  compiler  settings  and  platform
properties, this size cannot be calculated by the configuration tool.
To find the correct data structure sizes, you can use temporary code to perform a  ‘sizeof’
operation on the data types involved, or check your linker map file if it contains this kind of
data.
The MICROSAR NvM implementation supports a feature to verify the correct configuration
of  block  sizes.  It  is  strongly  recommended  to  enable  this feature;  it  also  provides  a  very
easy way to find out the correct block sizes.
Table 4-8 lists the types used by the different data elements.
NvRam  Item  RAM buffer symbol
Type
Comment
Admin Data
Dem_Cfg_AdminData
Dem_Cfg_AdminDataType
-
Event Data
Dem_Cfg_StatusData
Dem_Cfg_StatusDataType
-
Debounce Data  Dem_Cfg_DebounceData
Dem_Cfg_DebounceDataType
Only if de-
bounce counter
storage is
enabled
Available Data  Dem_Cfg_EventAvailableData
Dem_Cfg_EventAvailableDataType  Only if
DemAvailabilitySt
orage is enabled
Primary
Dem_Cfg_PrimaryEntry_0
Dem_Cfg_PrimaryEntryType
-
Memory
…
Dem_Cfg_PrimaryEntry_N
Secondary
Dem_Cfg_SecondaryEntry_0
Dem_Cfg_PrimaryEntryType
Only if secondary
Memory
…
memory is
Dem_Cfg_SecondaryEntry_N
enabled

Table 4-8   NvRam blocks

Note
Dem_Cfg_PrimaryEntry_0… Dem_Cfg_PrimaryEntry_N depend on the number of
  primary entries stored in the ECU. (e.g. 0 … 19 in case of 20 primary entries). The
same applies to the other memory types.

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4.5.2
NVRAM Initialization
The NvM provides a means to initialize RAM buffers, if the backing storage cannot restore
a preserved copy – e.g. because none has ever been stored yet.
For this, the Dem provides initialization functions and default ROM data. The Init functions
are declared in Dem_Cbk.h, the ROM constants are declared via Dem.h.
NvRam Item
Initialization
Admin Data
Call Dem_NvM_InitAdminData()
Event Data
Call Dem_NvM_InitStatusData()
Debounce Data
Call Dem_NvM_InitDebounceData()
Available Data
Call Dem_NvM_InitEventAvailableData()
Primary Memory
Copy initialization data from Dem_Cfg_MemoryEntryInit
Secondary Memory
Copy initialization data from Dem_Cfg_MemoryEntryInit
Table 4-9   NvRam initialization
4.5.2.1
Controlled Re-initialization
Some  use-cases  require  the  total  reset  of  all  stored  data.  A  simple  way  for  that  is  to
change the Dem configuration id (DemGeneral/DemCompiledConfigId) in the configuration
tool.
This  is  especially  useful  during  development,  when  a  different  software  configuration  is
loaded while the NV contents still remain from an older software version. Please be aware
that changing the Dem configuration is likely to require resetting the NV data.
If  a  different  configuration  id  is  detected  during  Dem_MasterInit(),  the  Dem  will
completely  reinitialize  all  data.  This  can  be  helpful  if  you  do  not  want  to  use  the  similar
feature provided by NvM.
In post-build configurations, the configuration Id will change automatically to ensure the NV
data is cleared if configuration changes invalidate the stored NV data.

Caution
Re-initialization is no replacement for ClearDtc. It will not respect any requirements
  regarding the clear command.

4.5.2.2
Manual Re-initialization
If you need to reset the Dem’s data manually, you can do so by calling all NvM initialization
callbacks (Dem_NvM_Init*, see chapter 6.4) and zeroing the Primary/Secondary memory
blocks (Dem_Cfg_PrimaryEntry_X, Dem_Cfg_SecondaryEntry_X).
Please  be  aware  that  this  will  not  cause  the  NvM  to  actually  persist  the  changes  into
NVRAM. You also need to mark the corresponding NvBlockIds as changed – refer to your
configuration to find out the correct handles.
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Caution
Do not modify the Dem NV data blocks while the Dem is active. This will cause
  undefined behavior, including write access to random memory locations.

4.5.2.3
Initialization and ECU Reset
The  Dem  module  currently  has  no  direct  control  over  the  order  the  NvM  module  writes
data to the backing storage. In order to persist newly initialized NV data, the Dem depends
on a full shutdown of the ECU.
In general there are three ways to achieve a consistent initialization state:
1.  The NvM supports a compiled config ID and can guarantee that all data is re-
initialized when this Id changes. The caveat with this approach is that the NvM
config ID feature cannot be restricted to the Dem data.
2.  Use the config ID feature or manual initialization of Dem NV data as described
prior in this chapter. Both these options require a full shutdown phase including
NvM_WriteAll to work correctly. These approaches work only when the ECU
design, or the software update process, guarantee a full shutdown.
3.  During the software update process you directly erase the NV data used by the
Dem. How to do this depends on the ECU design. But, when an ECU is expected
to hard reset after a SW update, the best way to achieve consistent initialization
without using the NvM compiled config Id is to clear the NV data in the backing
storage.

Caution
Although the Dem takes steps to sanitize the restored NV data, it is expected that the
  stored NV data matches the Dem configuration. Failing to clear the NV data on
configuration change can lead to unexpected behavior.

4.5.2.4
Common Errors
The Dem software cannot handle all possible inconsistent NV data combinations. In some
situations  the  NV  data  must  be  managed  in  parts  from  outside  the  Dem  to  ensure  data
consistency.
  Initial initialization:
On the very first startup, the Dem will re-initialize the NV data. Unless this data is
actually persisted within the NVRAM, the Dem will keep re-initializing all data on
startup.
You must allow the Dem to initialize its data, which requires at least one normal
shutdown.
  Incomplete recovery:
After changing the Dem configuration, the contents currently stored in the NV memory
are internally inconsistent for the Dem module. This can happen when applying a new
Dem installation on an existing hardware, or when changing the Dem configuration
during development.
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In most cases, the compiled config Id will suffice to re-initialize old content, but in some
cases the NvM will itself re-initialize some of the Dem blocks – but not all. In this case,
the compiled config Id does not work reliably.
4.5.3
Expected NvM Behavior
stm NVRAM Handling
Startup
Pre-Initialization
Run State
Shutdow n
[RAM destroyed]
[RAM intact]
Startup
DEM Pre-Initialization
Operate
Nv M Initialization
DEM
Dem Shutdow n
Nv M data retention
Initialization
notes
[!PostRunRequested]
notes
notes
notes
-> Dem_PreInit()
-> NvM_ReadAll()
notes
-> Dem_Shutdown()
-> NvM_WriteAll()
Abort
-> Dem_Init()
Shutdown
loop all Bocks used by Dem
loop all blocks used by Dem
Immediate NvRam write == ON             Immediate NvRam write == OFF
Block
Block
modified?
invalid?
[data has changed]
[data has changed]
[valid]
/NvM_WriteBlock
/NvM_SetRamBlockStatus
[Yes]
[Invalid]
[JobResult ==
NVM_REQ_OK]
Write data to
Initialize Block
NVRAM
w ait Nv M j ob notification
notes
Either option:
notes
call initialization function
-> Dem_NvM_JobFinished
copy ROM data
Ram-Block status:
[JobResult !=
unmodified
NVM_REQ_OK]
Ram-Block status:
/NvM_SetRamBlockStatus
modified
notes
NvM_SetRamBlockStatus

Figure 4-2  NvM behavior
The key assumptions about NvM behavior are depicted in Figure 4-2.
  The NvM initialization will start after Dem_MasterPreInit() was called.
  Before Dem_MasterInit() is called, all blocks used by Dem are either restored
from non-volatile memory, or re-initialized by calling the respective initialization
function or copying the initialization ROM data.
  If a block has been re-initialized, the NvM will not need a separate call to
NvM_SetRamBlockStatus() to retain the changed data later on.
  After Dem_Shutdown() is called, all blocks marked as modified by Dem or due to re-
initialization are retained in non-volatile memory.
  Before Dem_MasterInit() is called after a Dem_Shutdown(), all data has either
been restored again, or is still valid.
  After the Dem has requested an immediate write block, the NvM is expected to notify
the result by means of callback Dem_NvM_JobFinished().

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Caution
The Dem cannot keep track of NVRAM blocks that have not been retained in non-
  volatile memory if the shutdown process is aborted.
After Dem_MasterInit() is called, the Dem assumes the NvM will not need a trigger
to store a block which has changed before Dem_Shutdown() was called.
Due to this, the Dem will also not instruct the NvM to immediately write changed
environment data from before Dem_Shutdown().

Caution
The Dem tries to detect completely uninitialized NVRAM data by means of a ‘magic
  pattern’ in the AdminData block.
Still, the Dem is unable to detect only partially initialized data. So if your implementation
of the NvM module only initializes some of the Dem’s non-volatile data, the results are
undefined.

Caution
Even when some NV data is stored during runtime of the Dem module, it is not optional
  to store the remaining data as well.
The shutdown phase must always be finished before powering down the ECU. It is not
sufficient to simply drop the power supply.

Caution
If the NV data storage during runtime was not successful the Dem marks the NVRAM
  block as to be considered for shutdown NVRAM storage. Hence it is mandatory to
configure all Dem NVRAM blocks to be processed during NvM_WriteAll.

4.5.4
Flash Lifetime Considerations
If  you  need  to  safe  on  writes  to  the  NVRAM,  e.g.  because  your  backing  storage  is
implemented as Flash EEPROM emulation, be aware of your options available to reduce
Dem data writes.
NV  synchronization  takes  place at  least  at  shutdown,  but  due  to  configuration  or explicit
request  the  NV  data  can  be  synchronized  during  runtime  as  well.  In  that  case,  multiple
writes to the backing storage can happen during a single power cycle, increasing wear on
the backing storage. Please refer to Table 3-8 for details regarding the write frequency.
4.6
Rte Integration
4.6.1
Runnable Entities
The Dem has been implemented in a way that allows all API to safely preempt each other.
So, all runnables can be called from fully preemptive tasks.
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Runnable entity
Remarks
Dem_MainFunction
The Dem_MainFunction Runnable entity corresponds to
the Dem cyclic task function. As such, it has to be
mapped to a task.
Most notification and callout functions are called from this
Runnable
Dem_SetEventStatus
These runnables should not be mapped to a task for
Dem_ResetEventStatus
efficiency reasons.
Dem_GetEventStatus
Please note that these API are implemented reentrant for
Dem_GetEventFailed
different Pports, so clients do not need to synchronize
Dem_GetEventTested
these calls.
Dem_GetDTCOfEvent
Dem_GetEventEnableCondition
Dem_GetEventFreezeFrameData
Dem_GetEventExtendedDataRecord
Dem_GetFaultDetectionCounter
Dem_PrestoreFreezeFrame
Dem_ClearPrestoredFreezeFrame
Dem_GetDebouncingOfEvent
Dem_SetOperationCycleState
Dem_GetOperationCycleState
Dem_SetEnableCondition
Dem_SetStorageCondition
Dem_GetIndicatorStatus
Dem_GetEventMemoryOverflow
Dem_PostRunRequest
Dem_SetDTCSuppression
Dem_GetDTCSuppression
Table 4-10   Dem runnable entities
4.6.2
Application Port Interface
Application software will communicate with the Dem through port interfaces only. The Dem
port  interfaces  all  use  port  defines  arguments  to  abstract  from  internal  object  handles.
Please refer to general Autosar documentation (not in scope of this document).
The  EventId  is  available  through  some  notification  port  operations,  though  a  typical
application  is  strongly  advised  not  to  rely  on  the handle  of  a  Dem  event for any  reason.
Instead, use port mapping to use a specific event and let the Rte handle the details.
4.6.3
DcmIf

Changes
Since version 13.00.00 the DcmIf is no longer required and has been removed.

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4.7
Post-Run requirements
Before  shutting  down  the  Dem  by  calling  Dem_Shutdown()  the  runtime  environment
needs to verify that the Dem is in a consistent state.
Normally,  this  can  be  achieved  within  Dem_Shutdown(),  but  in  some  cases  the  Dem
needs  to  wait  for  an  NVRAM  write  operation  to  complete  before  the  cleanup  operations
can be performed. This will only be possible if immediate writes are activated.
For  this  reason,  the  Dem  must  be  queried  via  the API  Dem_PostRunRequested()  to
make  sure  there  are  no  pending  write  operations  that  block  the  shutdown  process.
Otherwise  the  Dem  will  notify  this  state  to  the  Det  (if  Development  Error  Detection  is
enabled) and some event related data will be lost. E.g. a cleared event could be present
again after the ECU restarts.
The runtime environment should make sure that monitors do not report test results to the
Dem  after  the  result  of  Dem_PostRunRequested()  is  evaluated,  because  this  would
lengthen the time the Dem requires in PostRun.

Note
If you want to test for the post run condition, the Dem will enter this state only if the
  same data is modified again while the NVRAM write is pending. This second
invalidation of the data block can only be reported to NvM after the write completes.

4.8
Run-Time limitation
In order to reduce run time ‘spikes’, the Dem supports a simple limiter for clearing the fault
memory.  In  effect,  the  Dem  can  be  instructed  to  only  delete  a  limited  number  of  DTCs
during  a  single  task  cycle.  This  will  cause  the  operation  to  take  much  longer,  but  will
distribute the effort through multiple task cycles.

Caution
Combined DTCs must be cleared ‘en bloc’, so the Dem will clear combined events
  even when it exceeds the allowed limit. Thus, the sum of the largest combined event
and the limiter value can be cleared during a single task cycle.

A suggestion for the ‘correct’ setting of the clear limit, or even if the feature should be used
in  a  given  set-up  cannot  be  given  in  the  scope  of  this  document.  It  remains  in  the
responsibility of the integrator to identify run-time constraints that require its use.
4.9
Split main function
The Dem currently only provides a single task function. In case the features ‘time based
debouncing’ and ‘OBD’ are not enabled, the Dem main function does not drive a timer. In
that case, the configured cycle time is irrelevant for the function of the Dem module.
This allows mapping the Dem task function on a lower priority task, or a background task.
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Since the Dcm APIs are also served from the Dem task function, this can affect the Dcm
response  times.  To  prevent  unwanted  NRC  78  (response  pending)  responses  from  the
Dcm  module,  make  sure  the  Dem  main  function  is  not  stalled  by  your  choice  of  task
mapping.
As  soon  as  the  Dem  configuration  requires  timer  handling  (e.g.  for  time  based  de-
bouncing), the Dem main function must be called with the configured cycle time.
4.10  Multi-Partition setup
The  Dem  architecture  (see  chapter  3.2)  expects  write  access  for  the  master  Dem  to  all
partitions, whereas the satellites themselves do not write memory outside of their partition
(see Figure 4-3). As a result, the DemMaster must be mapped to a partition which allows
this level of access.
BSW errors are not connected to the Dem via the RTE, as well aren’t direct function calls,
e.g. by Dcm, FiM or CDD modules. This removes the ability to ascertain a correct call at
configuration time.

Figure 4-3  Multi-Partition memory write access

Caution
Make sure that calls to Dem_SetEventStatus()originate from the partition configured for
  the reported event. Make sure other direct API calls originate from the partition
configured for the DemMaster.
The Dem implementation supports a development error check for this constraint.

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5  Measurement and Calibration
Measurement  and  calibration  is  a  powerful  workflow  during  ECU  development  phase
which  allows  to  monitor  (e.g.  via  XCP)  module  internal  variables  and  also  to  modify  the
configuration so the behavior will be changed. These changes in the module configuration
can be done without the need to build new software which is flashed into the ECU.
5.1
Measurable Data
Measurable objects are not intended to be modified as they may have direct influence to
DEM state machines and therefore might result in an undefined behavior. So their current
value shall be read out only.
Please  note  that  not  all  elements  might  be  available  –  disabled  features  usually  also
disable some of the RAM tables.
The following tables describe the measurable objects:
5.1.1
Dem_Cfg_StatusData
Dem_Cfg_StatusData
Measureable Item
Base Type
Description
FirstFailedEvent
uint16
The event id which was first reported as failed (FDC 127).
FirstConfirmedEvent
uint16
The event id which has confirmed first.
MostRecentFailedEvent
uint16
The event id which was reported as failed (FDC 127)
most recently.
MostRecentConfmdEvent  uint16
The event id which has confirmed most recently.
TripCount[]
uint8
The number of trips for each event.
EventStatus[]
uint8
The current UDS status for each event. Please note that
the actual DTC status may differ from the event status.
Table 5-1   Measurement item Dem_Cfg_StatusData
5.1.2
Dem_Cfg_EventDebounceValue
Dem_Cfg_EventDebounceValue[]
Measureable Item
Base Type
Description
Dem_Cfg_EventDebounceValue[]
sint16
Current value of the de-bounce counter or
time, depending on selected algorithm.
Table 5-2   Measurement item Dem_Cfg_EventDebounceValue
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5.1.3
Dem_Cfg_EventMaxDebounceValues
Dem_Cfg_EventMaxDebounceValues[]
Measureable Item
Base Type
Description
Dem_Cfg_EventMaxDebounceValues[]  sint16
Maximum value of the de-bounce counter or
time in current operation cycle, depending on
the selected algorithm.
Table 5-3   Measurement item Dem_Cfg_EventMaxDebounceValues[]
5.1.4
Dem_Cfg_PrimaryEntry_<Number>
Dem_Cfg_PrimaryEntry_<Number>
Measureable Item  Base Type
Description
Timestamp
uint32
Entry/ update time of the primary entry slot. Used to provide
a chronology order between the primary entry slots.
AgingCounter
uint16
The current aging count of the event (refer to 3.11.1).
EventId
uint16
The event id which is stored in this primary entry slot.
MaxDebounceValue  uint16
The maximum de-bounce value of the respective event since
last fault memory clear.
OccurrenceCounter  uint8 or uint16
refer to 3.11.1
SnapshotData[][]
uint8
refer to 3.11
ExtendedData[][]
uint8
refer to 3.11
ExtendedHeader
uint8
Bit coded information which extended data record is
currently stored.
SnapshotHeader
uint8
If DEM is configured for calculated snapshots: bit coded
information which snapshot record is currently stored.
If DEM is configured for configured snapshots: counter which
indicates the current number of stored snapshot records.
Table 5-4   Measurement item Dem_Cfg_PrimaryEntry_<Number>
5.2
Post-Build Support
Please also refer to chapter 7.3 for configuration aspects of the post-build features.
5.2.1
Initialization
During  the  startup  of  the  ECU,  the  Dem  expects  to  receive  a  pointer  to  preliminary
configuration  data  in  Dem_MasterPreInit().  Typically  the  final  ECU  configuration  is
determined after the NV subsystem is available, but the Dem still needs access to the de-
bouncing configuration of events reported prior to full initialization.
The final configuration data can optionally be passed to Dem_MasterInit().
Both pointers are passed by the MICROSAR EcuM based on the post-build configuration.
If  no  MICROSAR  EcuM  is  used,  the  procedure  of  how  to  find  the  proper  initialization
pointers is out of scope of this document.
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Caution
The final configuration may not introduce change to the de-bouncing configuration of
  events reported prior to full initialization.
The new configuration data cannot be applied in retrospect, so the state of these
events could become inconsistent, e.g. FDC > 127, and TestFailed == 0.

The  Dem  module  will  verify  the  configuration  data  before  accepting  it  to  initialize  the
module. If this verification fails, an EcuM error hook (see chapter  6.3.1) is called with an
error code according to Table 5-5.
Error Code
Reason
ECUM_BSWERROR_NULLPTR
Initialization with a null pointer.
ECUM_BSWERROR_MAGICNUMBER
Magic pattern check failed. This pattern is
appended at the end of the initialization root
structure. An error here is a strong indication of
random data, or a major incompatibility
between the code and the configuration data.
ECUM_BSWERROR_COMPATIBILITYVERSION  The configuration data was created by an
incompatible generator. This is also tested by
verification of a ‘magic’ pattern, so initialization
with random data can also cause this error
code.
Table 5-5   Error Codes possible during Post-Build initialization failure
If no MICROSAR EcuM is used, this error hooks and the error code constants have to be
provided by the environment.
1.  If the pointer equals NULL_PTR, initialization is rejected.
2.  If the initialization structure does not end with the correct magic number it is rejected.
3.  If the initialization structure was created by an incompatible generator version it is
rejected (starting magic number check)

Caution
The verification steps performed during initialization are neither intended nor sufficient
  to detect corrupted configuration data. They are intended only to detect initialization
with a random pointer, and to reject data created by an incompatible generator version.

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5.2.2
Post-Build Loadable
Vector also provides a tool based approach superior to calibration. While calibration only
modifies  existing  configuration  tables,  the  Post-Build  Loadable  approach  also  allows  to
validate the configuration change preventing misconfiguration, and to use compacted table
structures – with benefits to run-time and ROM usage.

Note
We do not support adding (or removing) of Events to /from an existing configuration
  during Post-Build. If you have ‘inactive’ monitors that are enabled by calibration or
other means, statically set up the Event for this monitor and use the API
Dem_SetEventAvailable() to control event availability.

5.2.3
Post-Build Selectable
The MICROSAR Identity Manager (refer to  [9]) is an implementation of  the AUTOSAR 4
post-build  selectable  concept.  It  allows  the  ECU  manufacturer  to  include  several  DEM
configurations  within  one  ECU.  With  post-build  selectable  and  the  Identity  Manager  the
ECU  variants  are  downloaded  within  the  ECUs  non-volatile  memory  (e.g.  flash)  at  ECU
build  time.  Post-build  selectable  does  not  allow  modification  of  DEM  aspects  after  ECU
build time.

Note
Please refer to the basic software module description (bswmd) file accompanying your
  delivery to find which parameters support post-build selectable.
This information is also displayed in the DaVinci Configurator 5 tool.

Note
We do not support adding (or removing) of Events to / from an existing configuration. If
  you have monitors that are enabled only in some configurations, set up the Event for
this monitor and use the configuration parameter DemEventAvailableInVariant, or API
Dem_SetEventAvailable() to control event availability.
It is not supported to disable all events in all variants using parameter
DemEventAvailableInVariant.

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6 API Description
For an interfaces overview please see Figure 2-2.
6.1
Type Definitions
The types defined by the Dem are described in [1].
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6.2
Services provided by Dem

Basic Knowledge
Call context means ‘who calls the API’. Typically these are rooted in an OS task
  function or interrupt service routine and contain the call stack up to the API in question.
Call contexts are important to analyze possible data corruption that can occur due to
simultaneous calls from different call contexts. This is not restricted to interruption due
to preemptive OS tasks – A call to an API function from within a notification or callback
function also is a different call context.
Typically not all possible call sequences can be implemented safe for data consistency
with reasonable effort, and valid call contexts might be restricted as a consequence.

6.2.1
Dem_GetVersionInfo()
Prototype
void Dem_GetVersionInfo ( Std_VersionInfoType* versioninfo )
Parameter
versioninfo
Pointer to where to store the version information of this module.
Return code
void
N/A
Functional Description
Returns the version information of this module.
The version information is decimal coded.
Particularities and Limitations
>  This function is reentrant.
>  This function is synchronous.
Expected Caller Context
>  This function can be called from any context.
Table 6-1   Dem_GetVersionInfo()
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6.2.2
Dem_MasterMainFunction()
Prototype
void Dem_MasterMainFunction ( void )
Parameter
N/A
N/A
Return code
void
N/A
Functional Description
Processes status changes and serves as time base.
This function implements run-time heavy tasks. Make sure to allow it has a sufficient time slot for worst
case execution scenarios.
Particularities and Limitations
>  This function is not reentrant.
>  This function is synchronous.
Expected Caller Context
>  This function can be called from any context.
Table 6-2   Dem_MasterMainFunction()
6.2.3
Dem_SatelliteMainFunction()
Prototype
void Dem_SatelliteMainFunction ( void )
Parameter
SatelliteId
Identification of a satellite by assigned SatelliteId.
Return code
void
N/A
Functional Description
Processes time based de-bouncing for events assigned to the satellite.
Particularities and Limitations
>  This function is not reentrant.
>  This function is synchronous.
Expected Caller Context
>  This function can be called from any context.
Table 6-3   Dem_SatelliteMainFunction()
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6.2.4
Dem_MainFunction()
Prototype
void Dem_MainFunction ( void )
Parameter
N/A
N/A
Return code
void
N/A
Functional Description
Processes all not event based Dem internal functions.
This function implements run-time heavy tasks. Make sure to allow it has a sufficient time slot for worst
case execution scenarios.
Particularities and Limitations
>  This function is not reentrant.
>  This function is synchronous.
>  This function can only be used in configurations with one partition, i.e. a single satellite.
Expected Caller Context
>  This function can be called from any context.
Table 6-4   Dem_MainFunction()
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6.2.5
Interface EcuM
6.2.5.1
Dem_MasterPreInit()
Prototype
void Dem_MasterPreInit ( const Dem_ConfigType* ConfigPtr )
Parameter
ConfigPtr
Pointer to preliminary configuration data
Return code
void
N/A
Functional Description
Initializes the basic functionality of the master partition.
Particularities and Limitations
>  This function is not reentrant.
>  This function is synchronous.
>  The ConfigPtr is used only in post-build variants.
>  If ConfigPtr is not needed, it is not checked to be non-NULL
Expected Caller Context
>  This function may not interrupt any other Dem function.
Table 6-5  Dem_MasterPreInit()
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6.2.5.2
Dem_SatellitePreInit()
Prototype
void Dem_SatellitePreInit ( Dem_SatelliteInfoType SatelliteId )
Parameter
SatelliteId
Identification of a satellite by assigned SatelliteId.
Return code
void
N/A
Functional Description
Initializes the basic functionality of the satellite so that events assigned to this satellite can be reported by
BSW-modules.
Particularities and Limitations
>  This function is not reentrant.
>  This function is synchronous.
Expected Caller Context
>  This function may not interrupt any other Dem function.
Table 6-6  Dem_SatellitePreInit()
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6.2.5.3
Dem_PreInit()
Prototype
void Dem_PreInit ( const Dem_ConfigType* ConfigPtr )
Parameter
ConfigPtr
Pointer to preliminary configuration data
Return code
void
N/A
Functional Description
Initializes the basic functionality of the master and satellite partition so that events can be reported by
BSW-modules.
Particularities and Limitations
>  This function is not reentrant.
>  This function is synchronous.
>  The ConfigPtr is used only in post-build variants.
>  If ConfigPtr is not needed, it is not checked to be non-NULL.
>  This function can only be used in configurations with one partition, i.e. a single satellite.
Expected Caller Context
>  This function may not interrupt any other Dem function.
Table 6-7   Dem_PreInit()
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6.2.5.4
Dem_MasterInit()
Prototype
void Dem_MasterInit ( const Dem_ConfigType* ConfigPtr )
Parameter
ConfigPtr
Pointer to configuration data (Since version 7.00.00)
Return code
void
N/A
Functional Description
Initializes or re-initializes the master partition.
If NULL is passed, the configuration passed to Dem_PreInit() will be used instead.
Particularities and Limitations
>  This function is not reentrant.
>  This function is synchronous.
>  The ConfigPtr is used only in post-build variants.
>  The pointer is not checked to be non-NULL
Expected Caller Context
>  This function may not interrupt any other Dem function.
Table 6-8  Dem_MasterInit()
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6.2.5.5
Dem_SatelliteInit()
Prototype
void Dem_SatelliteInit ( Dem_SatelliteInfoType SatelliteId )
Parameter
SatelliteId
Identification of a satellite by assigned SatelliteId.
Return code
void
N/A
Functional Description
Initializes the satellite partition.
Particularities and Limitations
>  This function is not reentrant.
>  This function is synchronous.
Expected Caller Context
>  This function may not interrupt any other Dem function.
Table 6-9  Dem_SatelliteInit()
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6.2.5.6
Dem_Init()
Prototype
void Dem_Init ( const Dem_ConfigType* ConfigPtr )
Parameter
ConfigPtr
Pointer to configuration data (Since version 7.00.00)
Return code
void
N/A
Functional Description
Initializes the master and satellite partition.
If NULL is passed, the configuration passed to Dem_PreInit() will be used instead.
Particularities and Limitations
>  This function is not reentrant.
>  This function is synchronous.
>  The ConfigPtr is used only in post-build variants.
>  The pointer is not checked to be non-NULL.
>  This function can only be used in configurations with one partition, i.e. a single satellite.
Expected Caller Context
>  This function may not interrupt any other Dem function.
Table 6-10   Dem_Init()
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6.2.5.7
Dem_InitMemory()
Prototype
void Dem_InitMemory ( void )
Parameter
N/A
N/A
Return code
void
N/A
Functional Description
- Extension to Autosar –
Use this function to initialize static RAM variables in case the start-up code is not used to initialize RAM.
Particularities and Limitations
>  This function is not reentrant.
>  This function is synchronous.
Expected Caller Context
>  This function may not interrupt any other Dem function.
Table 6-11   Dem_InitMemory()
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6.2.5.8
Dem_Shutdown()
Prototype
void Dem_Shutdown ( void )
Parameter
N/A
N/A
Return code
void
N/A
Functional Description
Shutdown Dem functionality.
The function freezes the Dem data structures. As a result the Dem functionality is no longer available, but
the Dem non-volatile data can be stored in non-volatile memory.
Particularities and Limitations
>  This function is not reentrant.
>  This function is synchronous.
>  Most pending asynchronous tasks will get lost when this function is called. The only
exceptions are pending event status changes. These remain queued according to [1].
Expected Caller Context
>  This function may not interrupt any other Dem function. It has to be called from the master
partition.
Table 6-12   Dem_Shutdown()
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6.2.6
Interface SWC and CDD
6.2.6.1
Dem_SetEventStatus()
Prototype
Std_ReturnType Dem_SetEventStatus ( Dem_EventIdType EventId, Dem_EventStatusType
EventStatus )
Parameter
EventId
Identification of an event by assigned EventId.
EventStatus
Monitor test result
DEM_EVENT_STATUS_PASSED: monitor reports a qualified passed test
result
DEM_EVENT_STATUS_FAILED: monitor reports a qualified failed test result
DEM_EVENT_STATUS_PREPASSED: monitor reports a passed test result
DEM_EVENT_STATUS_PREFAILED: monitor reports a failed test result
DEM_EVENT_STATUS_PASSED_CONDITIONS_NOT_FULFILLED: monitor
reports a qualified passed test result when similar conditions are not fulfilled
DEM_EVENT_STATUS_FAILED_CONDITIONS_NOT_FULFILLED: monitor
reports a qualified failed test result when similar conditions are not fulfilled
DEM_EVENT_STATUS_PREPASSED_CONDITIONS_NOT_FULFILLED:
monitor reports a passed test result when similar conditions are not fulfilled
DEM_EVENT_STATUS_PREFAILED_CONDITIONS_NOT_FULFILLED:
monitor reports a failed test result when similar conditions are not fulfilled
DEM_EVENT_STATUS_FDC_THRESHOLD_REACHED:
monitor reports that FDC exceeds the storage threshold
Return code
Std_ReturnType
E_OK: set of event status was successful
E_NOT_OK: set of event status failed or could not be accepted (e.g.: the
operation cycle configured for this event has not been started, an according
enable condition has been disabled)
Functional Description
API for SWCs to report a monitor result to the Dem.
Particularities and Limitations
>  This function is reentrant (for different EventId).
>  This function is not reentrant with the other operations defined in DiagnosticMonitor (for the
same EventId) (see Table 6-102)
>  EventStatus values DEM_EVENT_STATUS_<x>_ CONDITIONS_NOT_FULFILLED are only
supported for OBD configurations.
>  EventStatus value DEM_EVENT_STATUS_FDC_THRESHOLD_REACHED is only valid for
events using monitor internal debouncing.
>  This function is synchronous.
Expected Caller Context
>  This function can be called from any context, with limitations. It has to be called from the
respective satellite partition.
Table 6-13   Dem_SetEventStatus()
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6.2.6.2
Dem_ResetEventStatus()
Prototype
Std_ReturnType Dem_ResetEventStatus ( Dem_EventIdType EventId )
Parameter
EventId
Identification of an event by assigned EventId.
Return code
Std_ReturnType
E_OK: reset of event status was successful
E_NOT_OK: reset of event status failed or is not allowed, because the event
is already tested in this operation cycle
Functional Description
Resets the event failed status of an event.
Particularities and Limitations
>  This function is reentrant (for different EventId).
>  This function is not reentrant with the other operations defined in DiagnosticMonitor (for the
same EventId) (see Table 6-102)
>  This function is asynchronous.
Expected Caller Context
>  This function can be called from any context, with limitations. It has to be called from the
respective satellite partition.
Table 6-14   Dem_ResetEventStatus()
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6.2.6.3
Dem_ResetEventDebounceStatus()
Prototype
Std_ReturnType Dem_ResetEventDebounceStatus() ( Dem_EventIdType EventId,
Dem_DebounceResetStatusType DebounceResetStatus )
Parameter
EventId
Identification of an event by assigned EventId.
DebounceResetStatus  Select the action to take
Return code
Std_ReturnType
E_OK: The request was processed successfully
E_NOT_OK: The request was rejected
Functional Description
SWC API to control the Dem internal event de-bouncing.
Depending on DebounceResetStatus and the EventId's configured debouncing algorithm, this API performs
the following:
>  Time Based Debouncing
>  DEM_DEBOUNCE_STATUS_FREEZE
If the de-bounce timer is active, it is paused without modifying its current value. Otherwise this has
no effect. The timer will continue if the monitor reports another PREFAILED or PREPASSED in the
same direction.
>  DEM_DEBOUNCE_STATUS_RESET
The de-bounce timer is stopped and its value is set to 0.
>  Counter Based Debouncing
>  DEM_DEBOUNCE_STATUS_FREEZE:
This has no effect.
>  DEM_DEDOUNCE_STATUS_RESET:
This will set the current value of the debounce counter back to 0.
>  Monitor Internal Debouncing
>  The API returns E_NOT_OK in either case.
Particularities and Limitations
>  This function is reentrant (for different EventId).
>  This function is not reentrant with the other operations defined in DiagnosticMonitor (for the
same EventId) (see Table 6-102)
>  This function is synchronous.
Expected Caller Context
>  This function can be called from any context, with limitations. It has to be called from the
respective satellite partition.
Table 6-15   Dem_ResetEventDebounceStatus()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.6.4
Dem_PrestoreFreezeFrame()
Prototype
Std_ReturnType Dem_PrestoreFreezeFrame ( Dem_EventIdType EventId )
Parameter
EventId
Identification of an event by assigned EventId.
Return code
Std_ReturnType
E_OK: Freeze frame pre-storage was successful
E_NOT_OK: Freeze frame pre-storage failed
Functional Description
Captures the freeze frame data for a specific event.
Particularities and Limitations
>  This function is reentrant (for different EventId).
>  This function is not reentrant with the other operations defined in DiagnosticMonitor (for the
same EventId) (see Table 6-102)
>  This function is synchronous.
>  The function can have significant run-time.
>  If the call to this function coincides with the event storage on the task function, the Dem might
capture a current data set instead of using the pre-stored data.
Expected Caller Context
>  This function can be called from any context, with limitations. It has to be called from the
master partition.
Table 6-16   Dem_PrestoreFreezeFrame()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.6.5
Dem_ClearPrestoredFreezeFrame()
Prototype
Std_ReturnType Dem_ClearPrestoredFreezeFrame ( Dem_EventIdType EventId )
Parameter
EventId
Identification of an event by assigned EventId.
Return code
Std_ReturnType
E_OK: Clear pre-stored freeze frame was successful
E_NOT_OK: Clear pre-stored freeze frame failed
Functional Description
Clears a pre-stored freeze frame of a specific event.
Particularities and Limitations
>  This function is reentrant (for different EventId).
>  This function is not reentrant with the other operations defined in DiagnosticMonitor (for the
same EventId) (see Table 6-102)
>  This function is synchronous.
>  If the call to this function coincides with the event storage on the task function, the Dem might
use the pre-stored data set instead of discarding it.
Expected Caller Context
>  This function can be called from any context, with limitations. It has to be called from the
master partition.
Table 6-17   Dem_ClearPrestoredFreezeFrame()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.6.6
Dem_SetOperationCycleState()
Prototype
Std_ReturnType Dem_SetOperationCycleState ( uint8 OperationCycleId,
Dem_OperationCycleStateType CycleState )
Parameter
OperationCycleId
Identification of operation cycle, like power cycle or driving cycle.
CycleState
New operation cycle state: (re-)start or end
DEM_CYCLE_STATE_START: start a stopped cycle or restart an active cycle
DEM_CYCLE_STATE_END: stop an active cycle
Return code
Std_ReturnType
E_OK: set of operation cycle was successful
E_NOT_OK: set of operation cycle failed
Functional Description
This function reports a started or stopped operation cycle to the Dem.
The state change will set TestNotCompletedThisOperationCycle bits for all events using OperationCycleId
as operation cycle. Also all passive events using OperationCycleId as aging or healing cycle will increase
their respective counter and can heal or age.
It is allowed to call this run in pre-initialized mode to start the operation cycle of BSW events before full
initialization.
Since all these operations are computationally intensive, this function will not immediately complete but
postpone the work to the Dem task. Events that use OperationCycleId as operation cycle still use the last
known state until then.
Particularities and Limitations
>  This function is reentrant (for different OperationCycleId).
>  This function is synchronous.
Expected Caller Context
>  This function can be called from any context, with limitations. It has to be called from the
master partition.
Table 6-18   Dem_SetOperationCycleState()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.6.7
Dem_GetOperationCycleState()
Prototype
Std_ReturnType Dem_GetOperationCycleState ( uint8 OperationCycleId,
Dem_OperationCycleStateType* CycleState )
Parameter
OperationCycleId
Identification of operation cycle, like power cycle or driving cycle.
CycleState
State of the requested operation cycle: (re-)start or end
DEM_CYCLE_STATE_START: operation cycle is (re-)started
DEM_CYCLE_STATE_END: operation cycle is ended
Return code
Std_ReturnType
E_OK: request for operation cycle state was successful
E_NOT_OK: request for operation cycle state failed
Functional Description
This function returns the current operation cycle state.

Particularities and Limitations
>  This function is reentrant.
>  This function is synchronous.
Expected Caller Context
>  This function can be called from any context, with limitations. It has to be called from the
master partition.
Table 6-19   Dem_GetOperationCycleState
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.6.8
Dem_GetEventUdsStatus()
Prototype
Std_ReturnType Dem_GetEventUdsStatus ( Dem_EventIdType EventId,
Dem_UdsStatusByteType* UDSStatusByte )
Std_ReturnType Dem_GetEventStatus ( Dem_EventIdType EventId,
Dem_EventStatusExtendedType* UDSStatusByte )
Parameter
EventId
Identification of an event by assigned EventId.
UDSStatusByte
UDS event status byte of the requested event.
If the return value of the function call is E_NOT_OK, this parameter does not
contain valid data.
Return code
Std_ReturnType
E_OK: get of event status was successful
E_NOT_OK: get of event status failed
Functional Description
Gets the current UDS event status byte of an event.
API Dem_GetEventStatus is available for compatibility reasons. Please use Dem_GetEventUdsStatus
instead.
Particularities and Limitations
>  This function is reentrant (for different EventId).
>  This function is synchronous.
Expected Caller Context
>  This function can be called from any context.
Table 6-20   Dem_GetEventUdsStatus()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.6.9
Dem_GetMonitorStatus()
Prototype
Std_ReturnType Dem_GetMonitorStatus ( Dem_EventIdType EventId,
Dem_MonitorStatusType* MonitorStatus )
Parameter
EventId
Identification of an event by assigned EventId.
MonitorStatus
Monitor status byte of the requested event.
If the return value of the function call is E_NOT_OK, this parameter does not
contain valid data.
Return code
Std_ReturnType
E_OK: get monitor status was successful
E_NOT_OK: get monitor status failed
Functional Description
Gets the current monitor status of an event.
Particularities and Limitations
>  This function is reentrant (for different EventId).
>  This function is synchronous.
Expected Caller Context
>  This function can be called from any context.
Table 6-21   Dem_GetMonitorStatus()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.6.10  Dem_GetEventFailed()
Prototype
Std_ReturnType Dem_GetEventFailed ( Dem_EventIdType EventId, Boolean*
EventFailed )
Parameter
EventId
Identification of an event by assigned EventId.
EventFailed
TRUE – Last Failed
FALSE – not Last Failed
Return code
Std_ReturnType
E_OK: get of “EventFailed” was successful
E_NOT_OK: get of “EventFailed” was not successful
Functional Description
- Extension to Autosar –
Gets the failed status of an event.
Particularities and Limitations
>  This function is reentrant (for different EventId).
>  This function is synchronous.
Expected Caller Context
>  This function can be called from any context.
Table 6-22   Dem_GetEventFailed()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.6.11  Dem_GetEventTested()
Prototype
Std_ReturnType Dem_GetEventTested ( Dem_EventIdType EventId, Boolean*
EventTested )
Parameter
EventId
Identification of an event by assigned EventId.
EventTested
TRUE – event tested this cycle
FALSE – event not tested this cycle
Return code
Std_ReturnType
E_OK: get of event state “tested” successful
E_NOT_OK: get of event state “tested” failed
Functional Description
- Extension to Autosar –
Gets the tested status of an event.
Particularities and Limitations
>  This function is reentrant (for different EventId).
>  This function is synchronous.
Expected Caller Context
>  This function can be called from any context.
Table 6-23   Dem_GetEventTested()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.6.12  Dem_GetDTCOfEvent()
Prototype
Std_ReturnType Dem_GetDTCOfEvent ( Dem_EventIdType EventId, Dem_DTCFormatType
DTCFormat, uint32* DTCOfEvent )
Parameter
EventId
Identification of an event by assigned EventId.
DTCFormat
Defines the output-format of the requested DTC value.
DEM_DTC_FORMAT_UDS: output format shall be UDS
DEM_DTC_FORMAT_OBD: output format shall be OBD
DEM_DTC_FORMAT_J1939: output format shall be J1939
DTCOfEvent
Receives the DTC value in respective format returned by this function. If the
return value of the function is other than E_OK this parameter does not
contain valid data.
Return code
Std_ReturnType
E_OK: get of DTC was successful
E_NOT_OK: the call was not successful
E_NO_DTC_AVAILABLE: there is no DTC
Functional Description
Provides the DTC number for the given EventId.
Particularities and Limitations
>  This function is reentrant (for different EventId).
>  This function is synchronous.
Expected Caller Context
>  This function can be called from any context.
Table 6-24   Dem_GetDTCOfEvent()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.6.13  Dem_GetEventAvailable()
Prototype
Std_ReturnType Dem_GetEventAvailable (Dem_EventIdType EventId, Boolean
*AvailableStatus)
Parameter
EventId
Identification of an event by assigned EventId.
AvailableStatus
Receives the current availability status:
TRUE: Event is ‘available’
FALSE: Event is ‘not available’
Return code
Std_ReturnType
E_OK: Request processed successfully
E_NOT_OK: Invalid parameters passed to the function (only if Det is enabled).
Functional Description
This API returns the current availability state of an event (also see Dem_SetEventAvailable())
It is valid to call this API for events that have been set to unavailable.
Particularities and Limitations
>  This function is reentrant.
>  This function is synchronous.
>  Conditional [DemAvailabilityStorage == false]: This API may be called before full initialization
(after Dem_MasterPreInit).
Expected Caller Context
>  This function can be called from any context, with limitations.
Table 6-25   Dem_GetEventAvailable()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.6.14  Dem_SetEnableCondition()
Prototype
Std_ReturnType Dem_SetEnableCondition ( uint8 EnableConditionID, Boolean
ConditionFulfilled )
Parameter
EnableConditionID
This parameter identifies the enable condition.
ConditionFulfilled
This parameter specifies whether the enable condition assigned to the
EnableConditionID is fulfilled (TRUE) or not fulfilled (FALSE).
Return code
Std_ReturnType
E_OK: the enable condition could be set successfully
E_NOT_OK: the setting of the enable condition failed
Functional Description
Sets an enable condition.
Each event may have assigned several enable conditions. Only if all enable conditions referenced by the
event are fulfilled the event will be processed in Dem_SetEventStatus(), Dem_ReportErrorStatus() and
during time based de-bouncing.
Depending on configuration, enabling an enable condition can be deferred to the Dem task. Enable
condition changes of the same enable condition can be lost if they change faster than the cycle time of the
Dem main function. See chapter 3.8 for further details.
Particularities and Limitations
>  This function is reentrant (for different EnableConditionID).
>  This function is synchronous.
Expected Caller Context
>  This function can be called from any context, with limitations. It has to be called from the
master partition.
Table 6-26   Dem_SetEnableCondition()

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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.6.15  Dem_SetStorageCondition()
Prototype
Std_ReturnType Dem_SetStorageCondition ( uint8 StorageConditionID, Boolean
ConditionFulfilled )
Parameter
StorageConditionID
This parameter identifies the storage condition.
ConditionFulfilled
This parameter specifies whether the storage condition assigned to the
StorageConditionID is fulfilled or not fulfilled.
TRUE: storage condition fulfilled
FALSE: storage condition not fulfilled
Return code
Std_ReturnType
E_OK: the storage condition could be set successfully
E_NOT_OK: the setting of the storage condition failed
Functional Description
Sets a storage condition.
Each event may have assigned several storage conditions. Only if all storage conditions referenced by the
event are fulfilled the event may be stored in memory.
Particularities and Limitations
>  This function is reentrant (for different StorageConditionID).
>  This function is synchronous.
Expected Caller Context
>  This function can be called from any context, with limitations. It has to be called from the
master partition.
Table 6-27   Dem_SetStorageCondition()

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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.6.16  Dem_GetFaultDetectionCounter()
Prototype
Std_ReturnType Dem_GetFaultDetectionCounter ( Dem_EventIdType EventId, sint8*
FaultDetectionCounter )
Parameter
EventId
Provide the EventId value the fault detection counter is requested for. If the
return value of the function is other than OK this parameter does not contain
valid data.
FaultDetectionCounter  This parameter receives the Fault Detection Counter information of the
requested EventId. If the return value of the function call is other than E_OK
this parameter does not contain valid data.
-128dec…127dec PASSED… FAILED according to ISO 14229-1
Return code
Std_ReturnType
E_OK: request was successful
E_NOT_OK: request failed
DEM_E_NO_FDC_AVAILABLE: if the event does not support de-bouncing
Functional Description
Gets the fault detection counter of an event.
Particularities and Limitations
>  This function is reentrant (for different EventId).
>  This function is synchronous.
Expected Caller Context
>  This function can be called from any context.
Table 6-28   Dem_GetFaultDetectionCounter()

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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.6.17  Dem_GetIndicatorStatus()
Prototype
Std_ReturnType Dem_GetIndicatorStatus ( uint8 IndicatorId,
Dem_IndicatorStatusType* IndicatorStatus )
Parameter
IndicatorId
The respective indicator which shall be checked for its status.
IndicatorStatus
Status of the indicator, like off, on, or blinking.
DEM_INDICATOR_OFF: indicator off
DEM_INDICATOR_CONTINUOUS: continuous on
DEM_INDICATOR_BLINKING: blinking mode
DEM_INDICATOR_BLINK_CONT: continuous and blinking mode
DEM_INDICATOR_FAST_FLASH: fast flash mode
DEM_INDICATOR_SLOW_FLASH: slow flash mode
Return code
Std_ReturnType
E_OK: Operation was successful
E_NOT_OK: Operation failed or is not supported
Functional Description
Gets the indicator status derived from the event status and the configured indicator states.
Particularities and Limitations
>  This function is not reentrant.
>  This function is synchronous.
Expected Caller Context
>  This function can be called from any context. It has to be called from the master partition.
Table 6-29   Dem_GetIndicatorStatus()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.6.18  Dem_GetEventFreezeFrameDataEx()
Prototype
Std_ReturnType Dem_GetEventFreezeFrameDataEx ( Dem_EventIdType EventId, uint8
RecordNumber, uint16 DataId, uint8* DestBuffer, uint16* BufSize )
Parameter
EventId
Identification of an event by assigned EventId.
RecordNumber
This parameter is a unique identifier for a freeze frame record as defined in
ISO15031-5 and ISO14229-1.
0xFF means that the most recent freeze frame record shall be returned.
DataId
This parameter specifies the PID (ISO15031-5) or DID (ISO14229-1) that shall
be copied to the destination buffer.
DestBuffer
The pointer to the buffer where the freeze frame data shall be written to.
BufSize
When the function is called this parameter must contain the maximum number
of data bytes that can be written to the buffer.
The function returns the actual number of written data bytes in this parameter.
Return code
Std_ReturnType
E_OK: Operation was successful; the requested data was copied to the
destination buffer.
E_NOT_OK: The request was rejected, e.g. due to variant coding (see
Dem_SetEventAvailable()) OR
the requested data is currently not accessible (e.g. in case of asynchronous
preempted data retrieval from application).
DEM_NO_SUCH_ELEMENT: The data is not currently stored for the
requested event OR
the requested RecordNumber is not supported for the given event OR
the requested data identifier is not supported within the requested record
(freeze frame).
DEM_BUFFER_TOO_SMALL: The provided destination buffer is too small
Functional Description
Gets the data of a freeze frame/snapshot record for the given EventId.
Particularities and Limitations
>  This function is reentrant (for different EventId).
>  This function is synchronous.
Expected Caller Context
>  This function can be called from any context.
Table 6-30   Dem_GetEventFreezeFrameDataEx()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.6.19  Dem_GetEventExtendedDataRecordEx()
Prototype
Std_ReturnType Dem_GetEventExtendedDataRecordEx ( Dem_EventIdType EventId, uint8
RecordNumber, uint8* DestBuffer, uint16* BufSize )
Parameter
EventId
Identification of an event by assigned EventId.
RecordNumber
Identification of requested Extended data record. The valid range is 0x01 …
0xFF whereas 0xFF means that all extended data records shall be returned.
DestBuffer
The pointer to the buffer where the extended data shall be written to.
BufSize
When the function is called this parameter must contain the maximum number
of data bytes that can be written to the buffer.
The function returns the actual number of written data bytes in this parameter.
Return code
Std_ReturnType
E_OK: Operation was successful; the requested data was copied to the
destination buffer.
E_NOT_OK: The request was rejected, e.g. due to variant coding (see
Dem_SetEventAvailable()) OR
the requested data is currently not accessible (e.g. in case of asynchronous
preempted data retrieval from application).
DEM_NO_SUCH_ELEMENT: The data is not currently stored for the
requested event OR
the requested data was not copied due to an undefined RecordNumber for the
given event.
DEM_BUFFER_TOO_SMALL: The provided destination buffer is too small
Functional Description
Gets the data of an extended data record by the given EventId.
Particularities and Limitations
>  This function is reentrant (for different EventId).
>  This function is synchronous.
Expected Caller Context
>  This function can be called from any context.
Table 6-31   Dem_GetEventExtendedDataRecordEx()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.6.20  Dem_GetEventEnableCondition()
Prototype
Std_ReturnType Dem_GetEventEnableCondition ( Dem_EventIdType EventId, Boolean*
ConditionFulfilled )
Parameter
EventId
This parameter identifies the enable condition.
ConditionFulfilled
This parameter specifies whether the enable conditions assigned to the
EventId is fulfilled (TRUE) or not fulfilled (FALSE).
Return code
Std_ReturnType
E_OK: Request processed successfully
E_NOT_OK: Invalid parameters passed to the function (only if Det is enabled).
Functional Description
- Extension to AUTOSAR –
Returns the enable condition state for the given event.
Particularities and Limitations
>  This function is reentrant.
>  This function is synchronous.
Expected Caller Context
>  This function can be called from any context.
Table 6-32   Dem_GetEventEnableCondition()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.6.21  Dem_GetEventMemoryOverflow()
Prototype
Std_ReturnType Dem_GetEventMemoryOverflow ( uint8 ClientId, Dem_DTCOriginType
DTCOrigin, Boolean* OverflowIndication )
Parameter
ClientId
DemClientID identifying the DemEventMemorySet to which the requested
event memory belongs to.
DTCOrigin
Selects the memory which shall be checked for overflow indication.
DEM_DTC_ORIGIN_PRIMARY_MEMORY: event information located in the
primary memory
DEM_DTC_ORIGIN_SECONDARY_MEMORY: event information located in
the secondary memory
DEM_DTC_ORIGIN_PERMANENT_MEMORY: event information located in
the permanent memory
DEM_DTC_ORIGIN_MIRROR_MEMORY: event information located in the
mirror memory
OverflowIndication
This parameter returns TRUE if the according event memory was overflowed,
otherwise it returns FALSE.
Return code
Std_ReturnType
E_OK: Operation was successful
E_NOT_OK: Operation failed or is not supported
Functional Description
Reports if a DTC was displaced or not stored in the given event memory because the event memory was
completely full at the time.
ClientID is currently not evaluated as DemEventMemorySets are not supported.
Particularities and Limitations
>  This function is reentrant.
>  This function is synchronous.
Expected Caller Context
>  This function can be called from any context. It has to be called from the master partition.
Table 6-33   Dem_GetEventMemoryOverflow()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.6.22  Dem_GetNumberOfEventMemoryEntries()
Prototype
Std_ReturnType Dem_GetNumberOfEventMemoryEntries ( uint8 ClientId,
Dem_DTCOriginType DTCOrigin, uint8* NumberOfEventMemoryEntries )
Parameter
ClientId
DemClientID identifying the DemEventMemorySet to which the
requested event memory belongs to.
DTCOrigin
Identifier of the event memory concerned.
DEM_DTC_ORIGIN_PRIMARY_MEMORY: event information
located in the primary memory
DEM_DTC_ORIGIN_SECONDARY_MEMORY: event information
located in the secondary memory
DEM_DTC_ORIGIN_PERMANENT_MEMORY: event information
located in the permanent memory
DEM_DTC_ORIGIN_MIRROR_MEMORY: event information located
in the mirror memory
NumberOfEventMemoryEntries  Pointer to receive the event count.
Return code
Std_ReturnType
E_OK: Operation was successful
E_NOT_OK: Operation failed or is not supported
Functional Description
This function reports the number of event entries occupied by events. This does not necessarily correspond
to the DTC count read by Dcm due to event combination and other effects like post-building the OBD
relevance of a DTC stored in OBD permanent memory.
ClientID is currently not evaluated as DemEventMemorySets are not supported.
Particularities and Limitations
>  This function is reentrant.
>  This function is synchronous.
Expected Caller Context
>  This function can be called from any context. It has to be called from the master partition.
Table 6-34   Dem_GetNumberOfEventMemoryEntries()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.6.23  Dem_PostRunRequested()
Prototype
Std_ReturnType Dem_PostRunRequested (Boolean* IsRequested )
Parameter
IsRequested
Set to TRUE: In case the Dem needs more time to finish NvRAM related
tasks. Shutdown is not possible without data loss.
Set to FALSE: Shutdown is possible. This value is only valid if all monitors are
disabled.
Return code
Std_ReturnType
E_OK: is always returned with disabled Det
E_NOT_OK: is returned with enabled Det when an error is detected
Functional Description
- Extension to Autosar –
Test if the Dem can be shut down safely (without possible data loss).
This function must be polled after leaving RUN mode (all application monitors have been stopped). Due to
pending NvM activity, data loss is possible if Dem_Shutdown is called while this function still returns TRUE.
As soon as the NvM finishes writing the current Dem data block, this function will return FALSE. The time
window for unsafe shutdown only depends on the write time of a data block (up to several seconds in
unfortunate circumstances!)
Particularities and Limitations
>  This function is reentrant.
>  This function is synchronous.
Expected Caller Context
>  This function can be called from any context. It has to be called from the master partition.
Table 6-35   Dem_PostRunRequested()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.6.24  Dem_SetWIRStatus()
Prototype
Std_ReturnType Dem_SetWIRStatus (Dem_EventIdType EventId, Boolean WIRStatus )
Parameter
EventId
Identification of an event by assigned EventId.
WIRStatus
Set to TRUE:  The WarningIndicatorRequest Bit of the DTC status for the
specified Event will be reported as “1”, independent to the current event
status.
Set to FALSE: The behavior of the WarningIndicatorRequest Bit in the DTC
status byte only depends on the event status.
Return code
Std_ReturnType
E_OK: is returned if the new WIR status have been applied successfully
E_NOT_OK: is returned if the new WIR status have not been applied (e.g.
because of disabled ControlDTCSetting). The application should repeat the
request
Functional Description
This API can be used to override the status of the WarningIndicatorRequest Bit in the DTC status to “1”.
Note that overriding the WIR status does neither affect the internal event status nor any indicators related
to the event. Only the DTC status reported by APIs like Dem_GetStatusOfDTC (et al.) or the DT Status
Changed callbacks are affected.
Particularities and Limitations
>  This function is reentrant (for different EventId).
>  This function is synchronous.
Expected Caller Context
>  This function can be called from any context, with limitations. It has to be called from the
master partition.
Table 6-36   Dem_SetWIRStatus ()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.6.25  Dem_GetWIRStatus()
Prototype
Std_ReturnType Dem_GetWIRStatus (Dem_EventIdType EventId, Boolean* WIRStatus )
Parameter
EventId
Identification of an event by assigned EventId.
WIRStatus
Set to TRUE:  The WarningIndicatorRequest Bit is currently user-controlled
and have been set by the API Dem_SetWIRStatus.
Set to FALSE: The WarningIndicatorRequest Bit is currently not user-
controlled. The WIR-Bit in the DTC status byte only depends on the event
status.
Return code
Std_ReturnType
E_OK: Request processed successfully.
E_NOT_OK: Invalid parameters passed to the function (only if Det is enabled).
Functional Description
- Extension to Autosar –
This API can be used to get the current overridden status of the WarningIndicatorRequest Bit in the DTC
status.
Particularities and Limitations
>  This function is reentrant.
>  This function is synchronous.
Expected Caller Context
>  This function can be called from any context. It has to be called from the master partition.
Table 6-37   Dem_GetWIRStatus ()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.6.26  Dem_SetDTCSuppression()
Prototype
Std_ReturnType Dem_SetDTCSuppression (uint8 ClientId, boolean SuppressionStatus
)
Parameter
ClientId
Unique client id, assigned to the instance of the calling module
SuppressionStatus
TRUE: Suppress the DTC
FALSE: Lift suppression of the DTC
Return code
Std_ReturnType
E_OK: Request was processed successfully
E_NOT_OK: No DTC was selected before the call or invalid parameters
passed to the function (only if Det is enabled)
DEM_WRONG_DTC: The selected DTC does not exist in the selected origin
or no single DTC has been selected
DEM_WRONG_DTCORIGIN: The selected DTC origin does not exist
DEM_PENDING: The requested operation is not yet completed. The caller
can keep polling.
Functional Description
This API requires a DTC selection by Dem_SelectDTC() before it can be called.
The API suppresses the Event reporting the given DTCs such, that Dcm will not report the DTC. DTC
notification functions (e.g. to Dcm) are not called as well, preventing RoE responses.
Event reporting and notification (e.g. to FiM) are not affected and work as usual.
Particularities and Limitations
>  This function is reentrant for different ClientIds.
>  This function is synchronous.
>  When the call to this function interrupts the entry process, this function can suppress an event
that is in the process of being entered into the event memory. In that case the function returns
E_OK but the DTC is still reported to the Dcm.
In order to make sure the suppression works correctly, either
>  clear DTCs after changing suppression
>  change suppression of DTCs before the monitors start reporting
>  prevent interruption of the Dem task by this function
Expected Caller Context
>  This function can be called from SWC modules, with limitations. It has to be called from the
master partition.
Table 6-38   Dem_SetDTCSuppression()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.6.27  Dem_SetEventAvailable()
Prototype
Std_ReturnType Dem_SetEventAvailable (Dem_EventIdType EventId, Boolean
AvailableStatus)
Parameter
EventId
Identification of an event by assigned EventId.
AvailableStatus
TRUE: Set the Event to ‘available’
FALSE: Set the Event to ‘not available’
Return code
Std_ReturnType
E_OK: Request processed successfully
E_NOT_OK: Event is already active (i.e. stored in event memory), or invalid
parameters passed to the function (only if Det is enabled).
Functional Description
Setting an event to unavailable prevents all APIs from using this EventId.
Event reporting and notification are not possible and the event will not be stored to the event memory.
Events having bit 0 (TestFailed) or bit 3 (ConfirmedDTC) set, stored events and events requesting an
indicator cannot be set unavailable.
Normally, the availability setting is volatile, and this API must be called in each power cycle of the ECU. In
case the option DemAvailabilityStorage is active, the last state is persisted in NVRAM. Since NVRAM is
restored between PreInit and Init, this API cannot be called before full initialization when using this option.
Particularities and Limitations
>  This function is reentrant for different EventId.
>  This function is asynchronous.
>  Conditional [DemAvailabilityStorage == false]: This API may be called before full initialization
(after Dem_MasterPreInit).
>  Before full initialization, the API cannot verify if the preconditions mentioned (CDTC not set,
etc.) because the relevant information is not yet restored from NvRam. Therefore, event
availability will change unconditionally before full initialization, but stored DTCs will still appear
in the diagnostic responses.
Expected Caller Context
>  This function can be called from any context, with limitations. It has to be called from the
master partition.
Table 6-39   Dem_SetEventAvailable()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.6.28  Dem_ClearDTC()
Prototype
Std_ReturnType Dem_ClearDTC ( uint8 ClientId )
Parameter
ClientId
Unique client id, assigned to the instance of the calling module.
Return code
Std_ReturnType
E_OK: clearing has completed, the requested DTC(s) are reset.
DEM_WRONG_DTC: the requested DTC is not valid in the context of
DTCFormat and DTCOrigin.
DEM_WRONG_DTCORIGIN: the requested DTC origin is not available in the
context of DTCFormat.
DEM_CLEAR_FAILED: the clear operation could not be started.
DEM_PENDING: the clear operation was started and is currently processed to
completion.
DEM_BUSY: the clear operation is busy serving a different client.
DEM_CLEAR_MEMORY_ERROR: (Since AR4.2.1) The clear operation has
completed in RAM, but synchronization to NVRAM has failed.
Functional Description
Requires a prior call to Dem_SelectDTC to choose the DTC or DTC group to clear.
Clears the stored event data from the event memory, resets the event status byte and de-bounce state.
There is a variety of configuration settings that further control the behavior of this function:
>  see DemClearDTCBehavior to control what part of non-volatile write back must have completed before
this function returns E_OK
>  Init monitor functions are called when an event is cleared, after clearing the event but before returning
OK to the tester
>  If an event does not allow clearing (see CBClrEvt_<EventName>()), Init monitor callbacks are called
nonetheless.
Particularities and Limitations
>  This function is reentrant for different ClientIds.
>  This function is asynchronous.
Expected Caller Context
>  This function can be called from any context. It has to be called from the master partition.
Table 6-40   Dem_ClearDTC()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.6.29  Dem_RequestNvSynchronization()
Prototype
Std_ReturnType Dem_RequestNvSynchronization ( void )
Parameter
N/A
N/A
Return code
Std_ReturnType
E_OK: Request processed successfully
E_NOT_OK: Request not processed due to errors, e.g. not initialized
Functional Description
This function can be used to request synchronization with the NV memory.
Following the call to this API, the Dem module will write back all modified NV blocks to the backing storage.
Particularities and Limitations
>  The write process will take a long time (depending on the ECU load, NV subsystem and
configuration size, it can take multiple seconds)
>  Only modifications up to the call to this API are taken into account.
>  There is no indication when everything was written. The Dem still requires a proper shutdown
procedure even when this API is used.
>  If the Dem shuts down while synchronizing the NV content, pending changes are still written
during NvM_WriteAll so no data is lost.
Expected Caller Context
>  This function can be called from any context. It has to be called from the master partition.
>  Although this function is mapped to a port interface, it is safe for use from BSW or CDD
context.
Table 6-41   Dem_RequestNvSynchronization()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.6.30  Dem_GetDebouncingOfEvent()
Prototype
Std_ReturnType Dem_GetDebouncingOfEvent ( Dem_EventIdType EventId,
Dem_DebouncingStateType* DebouncingState )
Parameter
EventId
Identification of an event by assigned EventId.
DebouncingState
Debouncing state of event.
Multiple bits can be set depending on current FDC of the event:
DEM_TEMPORARILY_DEFECTIVE (Bit 0): Temporarily Defective
(corresponds to 0 < FDC < 127)
DEM_FINALLY_DEFECTIVE (Bit 1): Finally Defective
(corresponds FDC = 127)
DEM_TEMPORARILY_HEALED (Bit 2): Temporarily Healed
(corresponds to -128 < FDC < 0)
DEM_TEST_COMPLETE (Bit 3): Test Complete
(corresponds to FDC = -128 or FDC = 127)
DEM_DTR_UPDATE (Bit 4): DTR Update (= Test Complete && enable and
storage conditions of event fulfilled)
Return code
Std_ReturnType
E_OK: Operation was successful
E_NOT_OK: Operation failed
Functional Description
Returns the de-bouncing state for the given event.
This function shall not be used for events with monitor internal de-bouncing.
Particularities and Limitations
>  This function is reentrant.
>  This function is synchronous.
Expected Caller Context
>  This function can be called from any context.
Table 6-42   Dem_GetDebouncingOfEvent()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.6.31  Dem_SelectDTC()
Prototype
Std_ReturnType Dem_SelectDTC ( uint8 ClientId, uint32 DTC,
Dem_DTCFormatTypeDTCFormat, Dem_DTCOriginType DTCOrigin )
Parameter
ClientId
Unique client id, assigned to the instance of the calling module.
DTC
Defines the DTC in respective format that shall be selected in the event
memory. If the DTC fits to a DTC group number, all DTCs of the group shall be
selected.
DTCFormat
Defines the input format of the provided DTC value.
DEM_DTC_FORMAT_UDS: select UDS DTCs
DEM_DTC_FORMAT_OBD: select OBD DTCs
DEM_DTC_FORMAT_J1939:  select J1939 DTCs
DTCOrigin
This parameter is used to select the event memory.
DEM_DTC_ORIGIN_PRIMARY_MEMORY: Event information located in the
primary memory.
DEM_DTC_ORIGIN_SECONDARY_MEMORY: Event information located in
the secondary memory.
DEM_DTC_ORIGIN_PERMANENT_MEMORY: Event information located in
the permanent memory.
DEM_DTC_ORIGIN_MIRROR_MEMORY: Event information located in the
mirror memory
DEM_DTC_ORIGIN_OBD_RELEVANT_MEMORY: Same effect as for
DEM_DTC_ORIGIN_PRIMARY_MEMORY.
Return code
Std_ReturnType
E_OK: Selection processed successfully.
E_NOT_OK: Invalid parameters passed to the function (only if Det is enabled).
Functional Description
Selects a DTC or group of DTC.
This is a preparation step for other APIs that work on DTCs or a DTC group.
Whether the combination of parameter values of the selection is reasonable depends on the subsequent
API call. All applicable errors with respect to the DTC selected are returned by the respective API. E.g.
Dem_ClearDTC will return the appropriate return code if the DTC number is not available, or a DTC group
was correctly identified but prohibited from being cleared.
It is prohibited to select a DTC for a client during the execution of an asynchronous operation (e.g.
Dem_ClearDTC(), Dem_J1939DcmClearDTC(), Dem_DisableDTCRecordUpdate()). Selecting a DTC will
be permitted as soon as the asynchronous operation is finished, but before the final result is retrieved.
The DTC record update will be enabled for the selected DTC if it was disabled before.
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Particularities and Limitations
>  This function is reentrant for different ClientIds.
>  This function is asynchronous.
>  DTC format ‘DEM_DTC_FORMAT_OBD’ is not supported while selecting a single DTC.
Expected Caller Context
>  This function can be called from any context. It has to be called from the master partition.
Table 6-43   Dem_SelectDTC()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.6.32  Dem_GetDTCSelectionResult()
Prototype
Std_ReturnType Dem_GetDTCSelectionResult ( uint8 ClientId )
Parameter
ClientId
Unique client id, assigned to the instance of the calling module.
Return code
Std_ReturnType
E_OK: The DTC select parameter check is successful and the requested DTC
or group of DTC in the selected origin is selected for further operations.
E_NOT_OK: No DTC was selected before the call.
DEM_WRONG_DTC: The selected DTC does not exist in the selected origin.
DEM_WRONG_DTCORIGIN: The selected DTC origin does not exist.
DEM_PENDING: The requested operation is not yet completed. The caller
can keep polling.
Functional Description
This function requires a DTC selection by Dem_SelectDTC() before it can be called.
Use this API to check if a DTC or DTC group is supported by the Dem configuration.
Particularities and Limitations
>  This function is reentrant for different ClientIds.
>  This function is asynchronous.
Expected Caller Context
>  This function can be called from any context. It has to be called from the master partition.
Table 6-44   Dem_GetDTCSelectionResult()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.6.33  Dem_GetEventIdOfDTC()
Prototype
Std_ReturnType Dem_GetEventIdOfDTC ( uint8 ClientId, Dem_EventIdType* EventId )
Parameter
ClientId
Unique client id, assigned to the instance of the calling module.
EventId
This parameter receives the EventId of the requested DTC. If the return value
of the function call is other than E_OK this parameter does not contain valid
data.
Return code
Std_ReturnType
E_OK: The EventId of the selected DTC was stored in EventId.
E_NOT_OK: No DTC was selected before the call.
DEM_WRONG_DTC: The selected DTC does not exist in the selected origin
or no single DTC has been selected
DEM_WRONG_DTCORIGIN: The selected DTC origin does not exist.
DEM_PENDING: The requested operation is not yet completed. The caller
can keep polling.
Functional Description
- Extension to Autosar –
This function requires a DTC selection by Dem_SelectDTC() before it can be called.
Gets the EventId of a DTC.
Particularities and Limitations
>  This function is reentrant for different ClientIds.
>  This function is asynchronous.
Expected Caller Context
>  This function can be called from any context. It has to be called from the master partition.
Table 6-45   Dem_GetEventIdOfDTC()

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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.6.34  Dem_GetDTCSuppression()
Prototype
Std_ReturnType Dem_GetDTCSuppression (uint8 ClientId, boolean *SuppressionStatus
)
Parameter
ClientId
Unique client id, assigned to the instance of the calling module
SuppressionStatus
This parameter receives the current suppression state of the DTC. If the return
value of the function call is other than E_OK this parameter does not contain
valid data.
Return code
Std_ReturnType
E_OK: The suppression state of the DTC was stored in SuppressionStatus
E_NOT_OK: No DTC was selected before the call or invalid parameters
passed to the function (only if Det is enabled)
DEM_WRONG_DTC: The selected DTC does not exist in the selected origin
or no single DTC has been selected
DEM_WRONG_DTCORIGIN: The selected DTC origin does not exist
DEM_PENDING: The requested operation is not yet completed. The caller
can keep polling.
Functional Description
This API requires a DTC selection by Dem_SelectDTC() before it can be called.
The API retrieves the current suppression state of a DTC.
Particularities and Limitations
>  This function is reentrant for different ClientIds.
>  This function is synchronous.
Expected Caller Context
>  This function can be called from SWC modules, with limitations. It has to be called from the
master partition.
Table 6-46   Dem_GetDTCSuppression()

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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.7
Interface BSW
6.2.7.1
Dem_ReportErrorStatus()
Prototype
void Dem_ReportErrorStatus ( Dem_EventIdType EventId, Dem_EventStatusType
EventStatus )
Parameter
EventId
Identification of an event by assigned EventId.
EventStatus
Monitor test result
DEM_EVENT_STATUS_PASSED: monitor reports a qualified passed test
result
DEM_EVENT_STATUS_FAILED: monitor reports a qualified failed test result
DEM_EVENT_STATUS_PREPASSED: monitor reports a passed test result
DEM_EVENT_STATUS_PREFAILED: monitor reports a failed test result
DEM_EVENT_STATUS_PASSED_CONDITIONS_NOT_FULFILLED: monitor
reports a qualified passed test result when similar conditions are not fulfilled
DEM_EVENT_STATUS_FAILED_CONDITIONS_NOT_FULFILLED: monitor
reports a qualified failed test result when similar conditions are not fulfilled
DEM_EVENT_STATUS_PREPASSED_CONDITIONS_NOT_FULFILLED:
monitor reports a passed test result when similar conditions are not fulfilled
DEM_EVENT_STATUS_PREFAILED_CONDITIONS_NOT_FULFILLED:
monitor reports a failed test result when similar conditions are not fulfilled
DEM_EVENT_STATUS_FDC_THRESHOLD_REACHED:
monitor reports that FDC exceeds the storage threshold
Return code
void
N/A
Functional Description
- Extension to Autosar –
BSW API to report a monitor result.
Deprecated API; use Dem_SetEventStatus() instead.
Particularities and Limitations
>  This function is reentrant (for different EventId).
>  This function is asynchronous.
Expected Caller Context
>  This function can be called from any context. It has to be called from the respective satellite
partition.
Table 6-47   Dem_ReportErrorStatus()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.8
Interface Dcm
6.2.8.1
Dem_SetDTCFilter()
Prototype
Std_ReturnType Dem_SetDTCFilter ( uint8 ClientId, uint8 DTCStatusMask,
Dem_DTCFormatType DTCFormat, Dem_DTCOriginType DTCOrigin, boolean
FilterWithSeverity, Dem_DTCSeverityType DTCSeverityMask, boolean
FilterForFaultDetectionCounter )
Parameter
ClientId
Unique client id, assigned to the instance of the calling module.
DTCStatusMask
Status byte mask for DTC status byte filtering
0x00: deactivate the status-byte filtering to report all supported DTCs
0x01… 0xFF: status byte mask according to ISO14229-1 to filter for DTCs
with at least one status bit set matching this status byte mask.
The mask values 0x04, 0x08 and 0x0C will filter in chronologic order.
DTCFormat
Defines the output-format of the requested DTC values for the sub-sequent
API calls.
DEM_DTC_FORMAT_OBD: report DTC in OBD format
DEM_DTC_FORMAT_UDS: report DTC in UDS format
DEM_DTC_FORMAT_J1939: not allowed
DTCOrigin
If the Dem supports more than one event memory this parameter is used to
select the source memory the DTCs shall be read from.
DEM_DTC_ORIGIN_PRIMARY_MEMORY: event information located in the
primary memory
DEM_DTC_ORIGIN_SECONDARY_MEMORY: event information located in
the secondary memory
DEM_DTC_ORIGIN_PERMANENT_MEMORY: event information located in
the permanent memory
DEM_DTC_ORIGIN_MIRROR_MEMORY: event information located in the
mirror memory
DEM_DTC_ORIGIN_OBD_RELEVANT_MEMORY: Only OBD relevant DTCs
in primary memory are taken into account.
FilterWithSeverity
This flag defines whether severity information (ref. to parameter below) shall
be used for filtering. This is to allow for coexistence of DTCs with and without
severity information.
DTCSeverityMask
This parameter contains the DTCSeverityMask according to ISO14229-1.
Only evaluated if FilterWithSeverity == TRUE.
FilterForFaultDetect This flag defines whether the fault detection counter information shall be used
ionCounter
for filtering or not. If fault detection counter information is filter criteria, only
those DTCs with a fault detection counter value between 1 and 0x7E will be
reported.
Note: If the event does not use Dem internal de-bouncing, the Dem will
request this information via GetFaultDetectionCounter.
Return code
Std_ReturnType
Status of the operation to (re-)set a DTC filter.
E_OK: filter was accepted
E_NOT_OK: filter was not accepted
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
Functional Description
Initialize the DTC filter with the given criteria.
Particularities and Limitations
>  This function is reentrant for different ClientIds.
>  This function is synchronous.
>  Only available if ‘DemSupportDcm’ is set to enabled.
>  This function is only callable from the master partition (see ch. 3.2)
Expected Caller Context
>  This function can be called from any context.
Table 6-48   Dem_SetDTCFilter()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.8.2
Dem_GetNumberOfFilteredDTC()
Prototype
Std_ReturnType Dem_GetNumberOfFilteredDTC ( uint8 ClientId, uint16*
NumberOfFilteredDTC )
Parameter
ClientId
Unique client id, assigned to the instance of the calling module.
NumberOfFilteredDTC  Receives the number of DTCs matching the defined filter criteria.
Return code
Std_ReturnType
E_OK: a valid number of DTC was calculated
E_NOT_OK: No Filter was selected before the call.
DEM_PENDING: The requested operation is not yet completed. The caller
can keep polling.
Functional Description
Returns the number of DTCs matching the filter criteria.
This function requires setting a DTC Filter by Dem_SetDTCFilter() before it can be called.
Particularities and Limitations
>  This function is reentrant for different ClientIds.
>  This function is asynchronous.
>  Only available if ‘DemSupportDcm’ is set to enabled.
>  This function is only callable from the master partition (see ch. 3.2)
Expected Caller Context
>  This function can be called from any context.
Table 6-49   Dem_GetNumberOfFilteredDTC()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.8.3
Dem_GetNextFilteredDTC()
Prototype
Std_ReturnType Dem_GetNextFilteredDTC (uint8 ClientId, uint32* DTC, uint8*
DTCStatus )
Parameter
ClientId
Unique client id, assigned to the instance of the calling module.
DTC
Receives the DTC value in respective format of the filter returned by this
function. If the return value of the function is other than DEM_FILTERED_OK
this parameter does not contain valid data.
DTCStatus
This parameter receives the status information of the filtered DTC.
It follows the format as defined in ISO14229-1.
If the return value of the function call is other than DEM_FILTERED_OK this
parameter does not contain valid data.
Return code
Std_ReturnType
E_OK: DTC number and status are valid
E_NOT_OK: No Filter was selected before the call.
DEM_NO_SUCH_ELEMENT: no (further) DTC matches the filter criteria – end
of iteration
DEM_PENDING: The requested operation is not yet completed. The caller
can keep polling.
Functional Description
Gets the next filtered DTC and its status.
This function requires setting a DTC Filter by Dem_SetDTCFilter() before it can be called.
DEM_PENDING is not returned for OBD related requests.
Particularities and Limitations
>  This function is reentrant for different ClientIds.
>  This function is asynchronous.
>  Only available if ‘DemSupportDcm’ is set to enabled.
>  This function is only callable from the master partition (see ch. 3.2)
Expected Caller Context
>  This function can be called from any context.
Table 6-50   Dem_GetNextFilteredDTC()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.8.4
Dem_GetNextFilteredDTCAndFDC()
Prototype
Std_ReturnType Dem_GetNextFilteredDTCAndFDC ( uint8 ClientId, uint32* DTC,
sint8* DTCFaultDetectionCounter )
Parameter
ClientId
Unique client id, assigned to the instance of the calling module.
DTC
Receives the DTC value in respective format of the filter returned by this
function. If the return value of the function is other than E_OK this parameter
does not contain valid data.
DTCFaultDetectionCou This parameter receives the Fault Detection Counter information of the
nter
requested DTC. If the return value of the function call is other than E_OK this
parameter does not contain valid data.
-128dec…127dec  / PASSED…FAILED according to ISO 14229-1
Return code
Std_ReturnType
E_OK: DTC number and FDC are valid
E_NOT_OK: No Filter was selected before the call.
DEM_NO_SUCH_ELEMENT: no DTC can be identified (iteration end)
DEM_PENDING: The requested operation is not yet completed. The caller
can keep polling.
Functional Description
Gets the current DTC and its associated Fault Detection Counter (FDC) from the Dem.
This function requires setting a DTC Filter by Dem_SetDTCFilter() before it can be called.
Particularities and Limitations
>  This function is reentrant for different ClientIds.
>  This function is aynchronous.
>  Only available if ‘DemSupportDcm’ is set to enabled.
>  This function is only callable from the master partition (see ch. 3.2)
Expected Caller Context
>  This function can be called from any context.
Table 6-51   Dem_GetNextFilteredDTCAndFDC()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.8.5
Dem_GetNextFilteredDTCAndSeverity()
Prototype
Std_ReturnType Dem_GetNextFilteredDTCAndSeverity ( uint8 ClientId, uint32* DTC,
uint8* DTCStatus, Dem_DTCSeverityType* DTCSeverity, uint8* DTCFunctionalUnit )
Parameter
ClientId
Unique client id, assigned to the instance of the calling module.
DTC
Receives the DTC value in respective format of the filter returned by this
function. If the return value of the function is other than E_OK this parameter
does not contain valid data.
DTCStatus
Receives the status value returned by the function. If the return value of the
function is other than E_OK this parameter does not contain valid data.
DTCSeverity
Receives the severity value returned by the function. If the return value of the
function is other than E_OK this parameter does not contain valid data.
DTCFunctionalUnit
Receives the functional unit value returned by the function. If the return value
of the function is other than E_OK this parameter does not contain valid data.
Return code
Std_ReturnType
E_OK: DTC number and all other out parameter are valid
E_NOT_OK: No Filter was selected before the call.
DEM_NO_SUCH_ELEMENT: no DTC can be identified (iteration end)
DEM_PENDING: The requested operation is not yet completed. The caller
can keep polling.
Functional Description
Gets the current DTC and its Severity from the Dem.
This function requires setting a DTC Filter by Dem_SetDTCFilter() before it can be called.
Particularities and Limitations
>  This function is reentrant for different ClientIds.
>  This function is asynchronous.
>  Only available if ‘DemSupportDcm’ is set to enabled.
>  This function is only callable from the master partition (see ch. 3.2)
Expected Caller Context
>  This function can be called from any context.
Table 6-52   Dem_GetNextFilteredDTCAndSeverity()
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Version 7.6.1
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based on template version 5.0.0

Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.8.6
Dem_SetFreezeFrameRecordFilter()
Prototype
Std_ReturnType Dem_SetFreezeFrameRecordFilter (uint8 ClientId,
Dem_DTCFormatType DTCFormat, uint16* NumberOfFilteredRecords )
Parameter
ClientId
Unique client id, assigned to the instance of the calling module.
DTCFormat
Defines the output-format of the requested DTC values for the sub-sequent
API calls.
DEM_DTC_FORMAT_OBD: report DTC in OBD format
DEM_DTC_FORMAT_UDS: report DTC in UDS format
DEM_DTC_FORMAT_J1939: not allowed
NumberOfFilteredReco Receives the number of freeze frame records currently stored in the event
rds
memory.
Return code
Std_ReturnType
Status of the operation to (re-)set a freeze frame record filter.
E_OK: filter was accepted
E_NOT_OK: filter was not accepted
Functional Description
Initialize the DTC record filter with the given criteria.
Using this function all currently stored snapshot records are counted and the internal state machine is
initialized to read a copy of their data (see Dem_GetNextFilteredRecord()). The number of snapshot
records is not fixed. It can change after this function has returned, so Dem_GetNextFilteredRecord()  can
actually return fewer records.
Particularities and Limitations
>  This function is reentrant for different ClientIds.
>  This function is synchronous.
>  Only available if ‘DemSupportDcm’ is set to enabled.
>  This function is only callable from the master partition (see ch. 3.2)
Expected Caller Context
>  This function can be called from any context.
Table 6-53   Dem_SetFreezeFrameRecordFilter()
© 2017 Vector Informatik GmbH
Version 7.6.1
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based on template version 5.0.0

Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.8.7
Dem_GetNextFilteredRecord()
Prototype
Std_ReturnType Dem_GetNextFilteredRecord ( uint8 ClientId, uint32* DTC, uint8*
RecordNumber )
Parameter
ClientId
Unique client id, assigned to the instance of the calling module.
DTC
Receives the DTC value in respective format of the filter returned by this
function. If the return value of the function is other than E_OK this parameter
does not contain valid data.
RecordNumber
Receives the freeze frame record number of the reported DTC. If the return
value of the function is other than E_OK this parameter does not contain valid
data.
Return code
Std_ReturnType
E_OK: returned DTC number and RecordNumber are valid
E_NOT_OK: No Filter was selected before the call.
DEM_NO_SUCH_ELEMENT: no further matching records are available
DEM_PENDING: The requested operation is not yet completed. The caller
can keep polling.
Functional Description
Gets the next freeze frame/ snapshot record number and its associated DTC stored in the event memory.
This function requires setting a Record Filter by Dem_SetFreezeFrameRecordFilter() before it can be
called.
Particularities and Limitations
>  This function is reentrant for different ClientIds.
>  This function is asynchronous.
>  Only available if ‘DemSupportDcm’ is set to enabled.
>  This function is only callable from the master partition (see ch. 3.2)
Expected Caller Context
>  This function can be called from any context.
Table 6-54   Dem_GetNextFilteredRecord()
© 2017 Vector Informatik GmbH
Version 7.6.1
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based on template version 5.0.0

Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.8.8
Dem_GetStatusOfDTC()
Prototype
Std_ReturnType Dem_GetStatusOfDTC ( uint8 ClientId, uint8* DTCStatus )
Parameter
ClientId
Unique client id, assigned to the instance of the calling module.
DTCStatus
This parameter receives the status information of the requested DTC. If the
return value of the function call is other than E_OK this parameter does not
contain valid data.
Return code
Std_ReturnType
E_OK: The status information of the selected DTC was stored in DTCStatus
E_NOT_OK: No DTC was selected before the call.
DEM_WRONG_DTC: The selected DTC does not exist in the selected origin
OR a ‘DTC group’ or ‘all DTCs’ is selected OR the DTC is suppressed
DEM_WRONG_DTCORIGIN: The selected DTC origin does not exist
DEM_PENDING: The requested operation is not yet completed. The caller
can keep polling.
DEM_NO_SUCH_ELEMENT: The selected DTC does not support a status.
Functional Description
This function requires a DTC selection by Dem_SelectDTC() before it can be called.
Gets the current UDS status of a DTC.
Particularities and Limitations
>  This function is reentrant for different ClientIds.
>  This function is asynchronous.
>  Only available if ‘DemSupportDcm’ is set to enabled.
>  This function is only callable from the master partition (see ch. 3.2)
Expected Caller Context
>  This function can be called from any context.
Table 6-55   Dem_GetStatusOfDTC()
© 2017 Vector Informatik GmbH
Version 7.6.1
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based on template version 5.0.0

Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.8.9
Dem_GetDTCStatusAvailabilityMask()
Prototype
Std_ReturnType Dem_GetDTCStatusAvailabilityMask ( uint8 ClientId, uint8*
DTCStatusMask )
Parameter
ClientId
Unique client id, assigned to the instance of the calling module.
DTCStatusMask
The value DTCStatusMask indicates the supported DTC status bits from the
Dem. All supported information is indicated by setting the corresponding
status bit to 1.
Return code
Std_ReturnType
E_OK: get of DTC status mask was successful
E_NOT_OK: get of DTC status mask failed
Functional Description
Gets the DTC status availability mask.
Particularities and Limitations
>  This function is reentrant for different ClientIds.
>  This function is synchronous.
>  Only available if ‘DemSupportDcm’ is set to enabled.
>  This function is only callable from the master partition (see ch. 3.2)
Expected Caller Context
>  This function can be called from any context.
Table 6-56   Dem_GetDTCStatusAvailabilityMask()
© 2017 Vector Informatik GmbH
Version 7.6.1
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based on template version 5.0.0

Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.8.10  Dem_GetDTCByOccurrenceTime()
Prototype
Std_ReturnType Dem_GetDTCByOccurrenceTime ( uint8 ClientId, Dem_DTCRequestType
DTCRequest, uint32* DTC )
Parameter
ClientId
Unique client id, assigned to the instance of the calling module.
DTCRequest
This parameter defines the request type of the DTC.
DEM_FIRST_DET_CONFIRMED_DTC: first detected confirmed DTC
requested
DEM_MOST_RECENT_FAILED_DTC: most recent failed DTC requested
DEM_MOST_REC_DET_CONFIRMED_DTC: most recently detected
confirmed DTC requested
DEM_FIRST_FAILED_DTC: first failed DTC requested
DTC
Receives the DTC value in UDS format returned by the function. If the return
value of the function is other than E_OK this parameter does not contain valid
data.
Return code
Std_ReturnType
E_OK: the function returns a valid DTC
E_NOT_OK: the call was not successful (e.g. not supported by configuration)
DEM_NO_SUCH_ELEMENT: The requested DTC is not stored
Functional Description
Gets the DTC by occurrence time.
Particularities and Limitations
>  This function is reentrant for different ClientIds.
>  This function is synchronous.
>  Only available if ‘DemSupportDcm’ is set to enabled.
>  This function is only callable from the master partition (see ch. 3.2)
Expected Caller Context
>  This function can be called from any context.
Table 6-57   Dem_GetDTCByOccurrenceTime()
© 2017 Vector Informatik GmbH
Version 7.6.1
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based on template version 5.0.0

Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.8.11  Dem_GetTranslationType()
Prototype
Dem_DTCTranslationFormatType Dem_GetTranslationType ( uint8 ClientId )
Parameter
ClientId
Unique client id, assigned to the instance of the calling module.
Return code
Dem_DTCTranslationFo Returns the configured DTC translation format. A combination of different DTC
rmatType
formats is not possible.
DEM_DTC_TRANSLATION_ISO15031_6: DTC is formatted according
ISO15031-6
DEM_DTC_TRANSLATION_ISO14229_1: DTC is formatted according
ISO14229-1
DEM_DTC_TRANSLATION_SAEJ1939_73: DTC is formatted according
SAE1939-73
DEM_DTC_TRANSLATION_ISO11992_4: DTC is formatted according
ISO11992-4
DEM_DTC_TRANSLATION_J2012DA_FORMAT_04: DTC is formatted
according SAE_J2012-DA_DTCFormat_04
Functional Description
Gets the supported DTC formats of the ECU.
The supported formats are configured via DemTypeOfDTCSupported.
Particularities and Limitations
>  This function is reentrant for different ClientIds.
>  This function is synchronous.
>  Only available if ‘DemSupportDcm’ is set to enabled.
>  This function is only callable from the master partition (see ch. 3.2)
Expected Caller Context
>  This function can be called from any context.
Table 6-58   Dem_GetTranslationType()
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Version 7.6.1
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based on template version 5.0.0

Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.8.12  Dem_GetSeverityOfDTC()
Prototype
Std_ReturnType Dem_GetSeverityOfDTC ( uint8 ClientId, Dem_DTCSeverityType*
DTCSeverity )
Parameter
ClientId
Unique client id, assigned to the instance of the calling module.
DTCSeverity
This parameter receives the severity of the requested DTC. If the return value
of the function call is other than E_OK this parameter does not contain valid
data.
Return code
Std_ReturnType
E_OK: The severity information of the selected DTC was stored in
DTCSeverity. If no severity is configured for the selected DTC the returned
value for DTCSeverity is DEM_DTC_SEV_NO_SEVERITY.
E_NOT_OK: No DTC was selected before the call
DEM_WRONG_DTC: The selected DTC does not exist in the selected origin
or the DTC is suppressed or no single DTC has been selected
DEM_WRONG_DTCORIGIN: The selected DTC origin does not exist
DEM_PENDING: The requested operation is not yet completed. The caller
can keep polling.
Functional Description
This function requires a DTC selection by Dem_SelectDTC() before it can be called.
Gets the severity of the requested DTC.
Particularities and Limitations
>  This function is reentrant for different ClientIds.
>  This function is asynchronous.
>  Only available if ‘DemSupportDcm’ is set to enabled.
>  This function is only callable from the master partition (see ch. 3.2)
Expected Caller Context
>  This function can be called from any context.
Table 6-59   Dem_GetSeverityOfDTC()
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Version 7.6.1
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based on template version 5.0.0

Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.8.13  Dem_GetFunctionalUnitOfDTC()
Prototype
Std_ReturnType Dem_GetFunctionalUnitOfDTC ( uint8 ClientId, uint8*
DTCFunctionalUnit )
Parameter
ClientId
Unique client id, assigned to the instance of the calling module.
DTCFunctionalUnit
This parameter receives the functional unit of the requested DTC. If the return
value of the function call is other than E_OK this parameter does not contain
valid data.
Return code
Std_ReturnType
E_OK: The functional unit information of the selected DTC was stored in
DTCFunctionalUnit. If no functional unit is configured for the selected DTC the
value of DTCFunctionalUnit is set to 0x00.
E_NOT_OK: No DTC was selected before the call
DEM_WRONG_DTC: The selected DTC does not exist in the selected origin
or the DTC is suppressed or no single DTC has been selected
DEM_WRONG_DTCORIGIN: The selected DTC origin does not exist
DEM_PENDING: The requested operation is not yet completed. The caller
can keep polling.
Functional Description
This function requires a DTC selection by Dem_SelectDTC() before it can be called.
Gets the functional unit of the requested DTC.
Particularities and Limitations
>  This function is reentrant for different ClientIds.
>  This function is asynchronous.
>  Only available if ‘DemSupportDcm’ is set to enabled.
>  This function is only callable from the master partition (see ch. 3.2)
Expected Caller Context
>  This function can be called from any context.
Table 6-60   Dem_GetFunctionalUnitOfDTC()
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Version 7.6.1
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based on template version 5.0.0

Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.8.14  Dem_DisableDTCRecordUpdate()
Prototype
Std_ReturnType Dem_DisableDTCRecordUpdate ( uint8 ClientId )
Parameter
ClientId
Unique client id, assigned to the instance of the calling module.
Return code
Std_ReturnType
E_OK: entry is locked, read APIs may be called now
E_NOT_OK: No DTC was selected before the call.
DEM_WRONG_DTC: The selected DTC in the selected format does not exist
in the selected origin or the DTC is suppressed
DEM_WRONG_DTCORIGIN: The selected DTC origin does not exist
DEM_PENDING: The requested operation is not yet completed. The caller
can keep polling.
Functional Description
This function requires a DTC selection by Dem_SelectDTC() before it can be called.
Disables the event memory update of a specific DTC (only one at a time) so it can be read out by the Dcm.
Particularities and Limitations
>  This function is reentrant for different ClientIds.
>  This function is asynchronous.
>  Only available if ‘DemSupportDcm’ is set to enabled.
>  This function is only callable from the master partition (see ch. 3.2)
Expected Caller Context
>  This function can be called from any context.
Table 6-61   Dem_DisableDTCRecordUpdate()
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Version 7.6.1
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based on template version 5.0.0

Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.8.15  Dem_EnableDTCRecordUpdate()
Prototype
Std_ReturnType Dem_EnableDTCRecordUpdate ( uint8 ClientId )
Parameter
ClientId
Unique client id, assigned to the instance of the calling module.
Return code
Std_ReturnType
E_OK: Enabling the memory update was successful.
E_NOT_OK: Enabling was not successful (e.g. due to an invalid ClientId)
Functional Description
Enables the event memory update of the DTC disabled by Dem_DisableDTCRecordUpdate() before.
The arguments of a Dem_SelectDTC() call preceding this Dem_EnableDTCRecordUpdate() need not
match the arguments of the Dem_SelectDTC() call preceding Dem_DisableDTCRecordUpdate(). The
‘enable’ call will reverse the effects of the preceding ‘disable’ call.
Particularities and Limitations
>  This function is reentrant for different ClientIds.
>  This function is asynchronous.
>  Only available if ‘DemSupportDcm’ is set to enabled.
>  This function is only callable from the master partition (see ch. 3.2)
Expected Caller Context
>  This function can be called from any context.
Table 6-62   Dem_EnableDTCRecordUpdate()

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Version 7.6.1
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based on template version 5.0.0

Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.8.16  Dem_SelectFreezeFrameData()
Prototype
Std_ReturnType Dem_SelectFreezeFrameData ( uint8 ClientId, uint8 RecordNumber )
Parameter
ClientId
Unique client id, assigned to the instance of the calling module.
RecordNumber
This parameter is a unique identifier for a freeze frame record as defined in
ISO15031-5 and ISO14229-1.
The value 0x00 indicates the OBD freeze frame.
A value in range 0x01...0xFE selects a specific snapshot record
The value 0xFF selects all snapshot records.
Return code
Std_ReturnType
E_OK: Selection processed successfully.
E_NOT_OK: Invalid parameters passed to the function (only if Det is enabled).
Functional Description
Sets the filter to be used by Dem_GetNextFreezeFrameData() and
Dem_GetSizeOfFreezeFrameSelection().
The DTC whose freeze frame/snapshot record data shall be read, was selected beforehand by
Dem_SelectDTC().
Particularities and Limitations
>  This function is reentrant for different ClientIds.
>  This function is synchronous.
>  Only available if ‘DemSupportDcm’ is set to enabled.
>  This function is only callable from the master partition (see ch. 3.2)
>  With disabled Det, the return code is always E_OK
Expected Caller Context
>  This function can be called from any context.
Table 6-63   Dem_SelectFreezeFrameData ()
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Version 7.6.1
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based on template version 5.0.0

Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.8.17  Dem_GetNextFreezeFrameData()
Prototype
Std_ReturnType Dem_GetNextFreezeFrameData ( uint8 ClientId, uint8* DestBuffer,
uint16* BufSize )
Parameter
ClientId
Unique client id, assigned to the instance of the calling module.
DestBuffer
This parameter contains a byte pointer that points to the buffer, to which the
freeze frame data record shall be written to.
The format is: {RecordNumber, NumOfDIDs, DID[1], data[1], …, DID[N],
data[N]}
BufSize
When the function is called this parameter contains the maximum number of
data bytes that can be written to the buffer.
The function returns the actual number of written data bytes in this parameter.
Return code
Std_ReturnType
E_OK: Size and data were returned successfully.
E_NOT_OK: Missing call to Dem_SelectFreezeFrameData().
DEM_NO_SUCH_ELEMENT: The requested record is not available.
DEM_BUFFER_TOO_SMALL: The destination buffer is too small.
DEM_PENDING: The requested operation is not yet completed. The caller
can keep polling.
Functional Description
Gets freeze frame/ snapshot record data by DTC. The function stores the data in the provided DestBuffer. If
the requested freeze frame is not currently stored, no bytes are written to DestBuffer and BufSize is set to
0.
This function requires a DTC selection by Dem_SelectDTC() and a record selection by
Dem_SelectFreezeFrameData() before it can be called.
All applicable errors with respect to the selected DTC are already returned by
Dem_DisableDTCRecordUpdate() (which is a precondition for Dem_SelectFreezeFrameData()).
Particularities and Limitations
>  This function is reentrant for different ClientIds.
>  This function is asynchronous.
>  Only available if ‘DemSupportDcm’ is set to enabled.
>  This function is only callable from the master partition (see ch. 3.2)
Expected Caller Context
>  This function can be called from any context.
Table 6-64   Dem_GetFreezeFrameDataByDTC()
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Version 7.6.1
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based on template version 5.0.0

Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.8.18  Dem_GetSizeOfFreezeFrameSelection()
Prototype
Std_ReturnType Dem_GetSizeOfFreezeFrameSelection ( uint8 ClientId, uint16*
SizeOfFreezeFrame )
Parameter
ClientId
Unique client id, assigned to the instance of the calling module.
SizeOfFreezeFrame
Receive number of bytes in the requested freeze frame record.
Return code
Std_ReturnType
E_OK: Size returned successfully.
E_NOT_OK: Missing call to Dem_SelectFreezeFrameData().
DEM_NO_SUCH_ELEMENT: The requested record is not available.
DEM_PENDING: The requested operation is not yet completed. The caller
can keep polling.
Functional Description
Get the size of the selected snapshot record.
This function requires a DTC selection by Dem_SelectDTC() and a record selection by
Dem_SelectFreezeFrameData() before it can be called.
All applicable errors with respect to the selected DTC are already returned by
Dem_DisableDTCRecordUpdate() (which is a precondition for Dem_SelectFreezeFrameData()).
Particularities and Limitations
>  This function is reentrant for different ClientIds.
>  This function is asynchronous.
>  Only available if ‘DemSupportDcm’ is set to enabled.
>  This function is only callable from the master partition (see ch. 3.2)
Expected Caller Context
>  This function can be called from any context.
Table 6-65   Dem_GetSizeOfFreezeFrameByDTC()
© 2017 Vector Informatik GmbH
Version 7.6.1
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based on template version 5.0.0

Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.8.19  Dem_SelectExtendedDataRecord()
Prototype
Std_ReturnType Dem_SelectExtendedDataRecord ( uint8 ClientId, uint8
ExtendedDataNumber )
Parameter
ClientId
Unique client id, assigned to the instance of the calling module.
ExtendedDataNumber
0x01...0xEF selects a specific extended data record.
0xFE selects all emission related extended data records.
0xFF selects all extended data records
Return code
Std_ReturnType
E_OK: Selection processed successfully.
E_NOT_OK: Invalid parameters passed to the function (only if Det is enabled).
Functional Description
Sets the filter to be used by Dem_GetNextExtendedDataRecord() and
Dem_GetSizeOfExtendedDataRecordSelection().
The DTC whose extended data records shall be read, was selected beforehand by Dem_SelectDTC().
Particularities and Limitations
>  This function is reentrant for different ClientIds.
>  This function is synchronous.
>  Only available if ‘DemSupportDcm’ is set to enabled.
>  This function is only callable from the master partition (see ch. 3.2)
>  With disabled Det, the return code is always E_OK
Expected Caller Context
>  This function can be called from any context.
Table 6-66   Dem_SelectExtendedDataRecordBy()
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Version 7.6.1
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based on template version 5.0.0

Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.8.20  Dem_GetNextExtendedDataRecord()
Prototype
Std_ReturnType Dem_GetNextExtendedDataRecord ( uint8 ClientId, uint8*
DestBuffer, uint16* BufSize )
Parameter
ClientId
Unique client id, assigned to the instance of the calling module.
DestBuffer
This parameter contains a byte pointer that points to the buffer to which the
Extended Data shall be written.
The format is [RecordNumber, data[0], data[1] … data[N]]
BufSize
When the function is called this parameter contains the maximum number of
data bytes that can be written to the buffer.
The function returns the actual number of written data bytes in this parameter.
Return code
Std_ReturnType
E_OK: data was found and returned
E_NOT_OK: Missing call to Dem_SelectExtendedDataRecord().
DEM_NO_SUCH_ELEMENT: the requested record is not available
DEM_BUFFER_TOO_SMALL: the destination buffer is too small
DEM_PENDING: The requested operation is not yet completed. The caller
can keep polling.
Functional Description
Get the next selected extended data record. The function stores the data in the provided DestBuffer. If the
requested record is not currently stored, no bytes are written to DestBuffer and BufSize is set to 0.
This function requires a DTC selection by Dem_SelectDTC() and a record selection by
Dem_SelectExtendedDataRecord() before it can be called.
All applicable errors with respect to the selected DTC are already returned by
Dem_DisableDTCRecordUpdate() (which is a precondition for Dem_SelectExtendedDataRecord()).
Particularities and Limitations
>  This function is reentrant for different ClientIds.
>  This function is asynchronous.
>  Only available if ‘DemSupportDcm’ is set to enabled.
>  This function is only callable from the master partition (see ch. 3.2)
Expected Caller Context
>  This function can be called from any context.
Table 6-67   Dem_GetNextExtendedDataRecord ()
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Version 7.6.1
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based on template version 5.0.0

Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.8.21  Dem_GetSizeOfExtendedDataRecordSelection()
Prototype
Std_ReturnType Dem_GetSizeOfExtendedDataRecordSelection ( uint8 ClientId,
uint16* SizeOfExtendedDataRecord )
Parameter
ClientId
Unique client id, assigned to the instance of the calling module.
SizeOfExtendedDataRe Receives the size of the requested data record
cord
Return code
Std_ReturnType
E_OK: data was found and returned
E_NOT_OK: Missing call to Dem_SelectExtendedDataRecord().
DEM_NO_SUCH_ELEMENT: the requested record is not available
DEM_PENDING: The requested operation is not yet completed. The caller
can keep polling.
Functional Description
Get the size of a formatted extended data record stored for a DTC.
This function requires a DTC selection by Dem_SelectDTC() and a record selection by
Dem_SelectExtendedDataRecord() before it can be called.
All applicable errors with respect to the selected DTC are already returned by
Dem_DisableDTCRecordUpdate() (which is a precondition for Dem_SelectExtendedDataRecord()).
Particularities and Limitations
>  This function is reentrant for different ClientIds.
>  This function is asynchronous.
>  Only available if ‘DemSupportDcm’ is set to enabled.
>  This function is only callable from the master partition (see ch. 3.2)
Expected Caller Context
>  This function can be called from any context.
Table 6-68   Dem_GetSizeOfExtendedDataRecordByDTC()
© 2017 Vector Informatik GmbH
Version 7.6.1
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based on template version 5.0.0

Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.8.22  Dem_DisableDTCSetting()
Prototype
Std_ReturnType Dem_DisableDTCSetting ( uint8 ClientId )
Parameter
ClientId
Unique client id, assigned to the instance of the calling module.
Return code
Std_ReturnType
E_OK: the DTCs setting is switched off.
E_NOT_OK: Invalid parameters passed to the function (only if Det is enabled).
DEM_PENDING: The requested operation is not yet completed. The caller
can keep polling.
Functional Description
Disables the setting (including update) of the status bits of all DTCs.
Particularities and Limitations
>  This function is reentrant for different ClientIds.
>  This function is asynchronous.
>  Only available if ‘DemSupportDcm’ is set to enabled.
>  In this implementation the ‘ClientId’ value is ignored – each client disables all DTCs
>  This function is only callable from the master partition (see ch. 3.2)
Expected Caller Context
>  This function can be called from any context.
Table 6-69   Dem_DisableDTCSetting()
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Version 7.6.1
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based on template version 5.0.0

Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.8.23  Dem_EnableDTCSetting()
Prototype
Std_ReturnType Dem_EnableDTCSetting ( uint8 ClientId )
Parameter
ClientId
Unique client id, assigned to the instance of the calling module.
Return code
Std_ReturnType
E_OK: the DTCs setting is switched on.
E_NOT_OK: Invalid parameters passed to the function (only if Det is enabled).
DEM_PENDING: The requested operation is not yet completed. The caller
can keep polling.
Functional Description
Enables the DTC setting for all DTCs
Changes to control DTC setting can get lost if they toggle change faster than the cycle time of the Dem
main function. See chapter 3.8 for further details.
Particularities and Limitations
>  This function is reentrant for different ClientIds.
>  This function is asynchronous.
>  Only available if ‘DemSupportDcm’ is set to enabled.
>  In this implementation the ‘ClientId’ value is ignored – each client enables all DTCs
>  This function is only callable from the master partition (see ch. 3.2)
Expected Caller Context
>  This function can be called from any context.
Table 6-70   Dem_EnableDTCSetting()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.9
Interface J1939Dcm

Note
Dependent on the licensed components of your delivery the interfaces listed in this
  chapter may not be available in DEM.

6.2.9.1
Dem_J1939DcmClearDTC()
Prototype
Dem_ReturnClearDTCType Dem_J1939DcmClearDTC ( Dem_J1939DcmSetClearFilterType
DTCTypeFilter, Dem_DTCOriginType DTCOrigin, uint8 NodeAddress )
Parameter
DTCTypeFilter
DEM_J1939DTC_CLEAR_ALL: Clears all Active DTCs
DEM_J1939DTC_CLEAR_PREVIOUSLY_ACTIVE: Clears all previously
active DTCs
DEM_J1939DTC_CLEAR_ALL_AND_PREVIOUSLY_ACTIVE: Clears all
active and previously active DTCs
DTCOrigin
If the Dem supports more than one event memory, this parameter is used to
select the memory which shall be cleared.
DEM_DTC_ORIGIN_PRIMARY_MEMORY: event information located in the
primary memory
DEM_DTC_ORIGIN_SECONDARY_MEMORY: event information located in
the secondary memory
NodeAddress
The network management node ID to be cleared.
Return code
Dem_ReturnClearDTCTy E_OK: clearing has completed, the requested DTC(s) are reset.
pe
DEM_WRONG_DTC: the requested DTC is not valid in the context of
DTCFormat and DTCOrigin.
DEM_WRONG_DTCORIGIN: the requested DTCOrigin is not available in the
context of DTCFormat.
DEM_CLEAR_FAILED: the clear operation could not be started.
DEM_PENDING: the clear operation was started and is currently processed to
completion.
DEM_BUSY: the clear operation is busy serving a different client.
DEM_CLEAR_MEMORY_ERROR: (Since AR4.2.1) The clear operation has
completed in RAM, but synchronization to NVRAM has failed.
Functional Description
Clears the J1939 DTCs only
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Particularities and Limitations
>  This function is not reentrant.
>  This function is asynchronous.
>  Only available if ‘DemSupportJ1939Dcm’ is set to enabled.
Table 6-71   Dem_J1939DcmClearDTC()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.9.2
Dem_J1939DcmFirstDTCwithLampStatus()
Prototype
void Dem_J1939DcmFirstDTCwithLampStatus ( uint8 NodeAddress )
Parameter
NodeAddress
The network management node ID to be filtered.
Return code
void
N/A
Functional Description
Initializes the filter mechanism to the first event in the primary memory

Particularities and Limitations
>  This function is reentrant.
>  This function is synchronous.
>  Only available if ‘DemSupportJ1939Dcm’ is set to enabled.
Table 6-72   Dem_J1939DcmFirstDTCwithLampStatus()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.9.3
Dem_J1939DcmGetNextDTCwithLampStatus ()
Prototype
Dem_ReturnGetNextFilteredElementType Dem_J1939DcmGetNextDTCwithLampStatus  (
J1939DcmLampStatusType LampStatus, uint32 J1939DTC, uint8 OccurrenceCounter )
Parameter
LampStatus
DTC specific lamp status
J1939DTC
J1939 DTC number
OccurrenceCounter
The DTC specific occurrence counter
Return code
Dem_ReturnGetNext-
DEM_FILTERED_OK: Returned next filtered element
FilteredElementType  DEM_FILTERED_NO_MATCHING_ELEMENT: No further element (matching
the filter criteria) found
DEM_FILTERED_BUFFER_TOO_SMALL: not used
Functional Description
Gets the next filtered J1939 DTC for DM31 including current LampStatus

Particularities and Limitations
>  This function is not reentrant.
>  This function is synchronous.
>  Only available if ‘DemSupportJ1939Dcm’ is set to enabled.
Table 6-73   Dem_J1939DcmGetNextDTCwithLampStatus ()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.9.4
Dem_J1939DcmGetNextFilteredDTC()
Prototype
Dem_ReturnGetNextFilteredElementType Dem_J1939DcmGetNextFilteredDTC (uint32
J1939DTC, uint8 OccurenceCounter )
Parameter
J1939DTC
the J1939 DTC number
OccurenceCounter
the occurrence counter of the DTC
Return code
Dem_ReturnGetNext-
DEM_FILTERED_OK: Returned next filtered element
FilteredElementType  DEM_FILTERED_NO_MATCHING_ELEMENT: No further element (matching
the filter criteria) found
DEM_FILTERED_PENDING: The requested value is calculated
asynchronously and currently not available. The caller can retry later.
DEM_FILTERED_BUFFER_TOO_SMALL: not used
Functional Description
Provides the next DTC that matches the filter criteria.

Particularities and Limitations
>  This function is not reentrant.
>  This function is synchronous.
>  Only available if ‘DemSupportJ1939Dcm’ is set to enabled.
Table 6-74   Dem_J1939DcmGetNextFilteredDTC()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.9.5
Dem_J1939DcmGetNextFreezeFrame()
Prototype
Dem_ReturnGetNextFilteredElementType Dem_J1939DcmGetNextFreezeFrame ( uint32
J1939DTC, uint8 OccurrenceCounter , uint8 DestBuffer, uint8 BufSize )
Parameter
J1939DTC
J1939 DTC number
OccurrenceCounter
DTC specific occurrence counter
DestBuffer
Pointer to the buffer where the Freeze Frame data shall be copied to.
BufSize
in: size of the available buffer
out: number of bytes copied into the buffer
Return code
Dem_ReturnGetNext-
DEM_FILTERED_OK: Returned next filtered element
FilteredElementType  DEM_FILTERED_NO_MATCHING_ELEMENT: No further element (matching
the filter criteria) found
DEM_FILTERED_PENDING: The requested value is calculated
asynchronously and currently not available. The caller can retry later.
DEM_FILTERED_BUFFER_TOO_SMALL: Buffer in the BufSize parameter is
not huge enough
Functional Description
Returns the next J1939DTC and Freeze Frame matching the filter criteria

Particularities and Limitations
>  This function is not reentrant.
>  This function is asynchronous.
>  Only available if ‘DemSupportJ1939Dcm’ is set to enabled.
Table 6-75   Dem_J1939DcmGetNextFreezeFrame()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.9.6
Dem_J1939DcmGetNextSPNInFreezeFrame()
Prototype
Dem_ReturnGetNextFilteredElementType Dem_J1939DcmGetNextSPNInFreezeFrame (
uint32 SPNSupported, uint8 SPNDataLength )
Parameter
SPNSupported
This parameter contains the next SPN in the ExpandedFreezeFrame
SPNDataLength
This parameter contains the corresponding data length of the SPN
Return code
Dem_ReturnGetNext-
DEM_FILTERED_OK: Returned next filtered element
FilteredElementType  DEM_FILTERED_NO_MATCHING_ELEMENT: No further element (matching
the filter criteria) found
DEM_FILTERED_PENDING: The requested value is calculated
asynchronously and currently not available. The caller can retry later.
DEM_FILTERED_BUFFER_TOO_SMALL: Buffer in the BufSize parameter is
not huge enough
Functional Description
Returns the SPNs that are stored in the J1939 FreezeFrame(s)
This interface returns always DEM_FILTERED_NO_MATCHING_ELEMENT as the data is directly provided
from J1939DCM

Particularities and Limitations
>  This function is not reentrant.
>  This function is synchronous.
>  Only available if ‘DemSupportJ1939Dcm’ is set to enabled.
Table 6-76   Dem_J1939DcmGetNextSPNInFreezeFrame()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.9.7
Dem_J1939DcmGetNumberOfFilteredDTC ()
Prototype
Dem_ReturnGetNumberOfFilteredDTCType  Dem_J1939DcmGetNumberOfFilteredDTC  (
uint16 NumberOfFilteredDTC )
Parameter
NumberOfFilteredDTC  number of DTCs matching the filter criteria
Return code
Dem_ReturnGetNumber- DEM_NUMBER_OK: A valid number was calculated
OfFilteredDTCType
DEM_NUMBER_FAILED: No valid number can be calculated
DEM_NUMBER_PENDING: not used
Functional Description
Gets the number of currently filtered DTCs set by the function Dem_J1939DcmSetDTCFilter().
Particularities and Limitations
>  This function is not reentrant.
>  This function is synchronous.
>  Only available if ‘DemSupportJ1939Dcm’ is set to enabled.
Table 6-77   Dem_J1939DcmGetNumberOfFilteredDTC ()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.9.8
Dem_J1939DcmSetDTCFilter()
Prototype
Dem_ReturnSetFilterType Dem_J1939DcmSetDTCFilter (
Dem_J1939DcmDTCStatusFilterType DTCStatusFilter, Dem_DTCKindType DTCKind,
Dem_DTCOriginType DTCOrigin, uint8 NodeAddress, Dem_J1939DcmLampStatusType
LampStatus )
Parameter
DTCStatusFilter
DEM_J1939DTC_ACTIVE: Confirmed == 1 and TestFailed == 1
DEM_J1939DTC_PREVIOUSLY_ACTIVE: Confirmed == 1 and
TestFailed == 0
DEM_J1939DTC_PENDING: Pending == 1
DEM_J1939DTC_PERMANENT: not supported
DEM_J1939DTC_CURRENTLY_ACTIVE: TestFailed == 1
DTCKind
DEM_DTC_KIND_ALL_DTCS: All DTCs
DEM_DTC_KIND_EMISSION_REL_DTCS: not supported
DTCOrigin
If the Dem supports more than one event memory this parameter is used to
select the source memory the DTCs shall be read from.
DEM_DTC_ORIGIN_PRIMARY_MEMORY: event information located in the
primary memory
DEM_DTC_ORIGIN_SECONDARY_MEMORY: event information located in
the secondary memory
NodeAddress
The network management node ID to be filtered.
LampStatus
The ECU Lamp Status
HighByte
bits 7,6: Malfunction Indicator Lamp Status
bits 5,4: Red Stop Lamp Status
bits 3,2: Amber Warning Lamp Status
bits 1,0: Protect Lamp Status
LowByte
bits 7,6: Flash Malfunction Indicator Lamp
bits 5,4: Flash Red Stop Lamp
bits 3,2: Flash Amber Warning Lamp
bits 1,0: Flash Protect Lamp
Return code
Dem_ReturnSetFilterType
DEM_FILTER_ACCEPTED: Filter was accepted
DEM_WRONG_FILTER: Wrong filter selected
Functional Description
Sets the filter criteria for the J1939 DTC filter mechanism and returns the ECU lamp status.

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Particularities and Limitations
>  This function is not reentrant.
>  This function is synchronous.
>  Only available if ‘DemSupportJ1939Dcm’ is set to enabled.
Table 6-78   Dem_J1939DcmSetDTCFilter()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.9.9
Dem_J1939DcmSetFreezeFrameFilter()
Prototype
Dem_ReturnSetFilterType Dem_J1939DcmSetFreezeFrameFilter (
Dem_J1939DcmSetFreezeFrameFilterType FreezeFrameKind, uint8 NodeAddress )
Parameter
FreezeFrameKind
DEM_J1939DCM_FREEZEFRAME: Set the filter for J1939 Freeze Frame
data
DEM_J1939DCM_EXPANDED_FREEZEFRAME: Set the filter for J1939
Expanded Freeze Frame data
DEM_J1939DCM_SPNS_IN_EXPANDED_FREEZEFRAME: Not supported,
DM24 message is handled by J1939Dcm
NodeAddress
The network management node ID to be filtered.
Return code
Dem_ReturnSetFilterType  DEM_FILTER_ACCEPTED: Filter was accepted
DEM_WRONG_FILTER: Wrong filter selected
Functional Description
Sets the filter criteria for the consecutive calls of functions
>  - Dem_J1939DcmGetNextFreezeFrame()
>  - Dem_J1939DcmGetNextSPNInFreezeFrame()

Particularities and Limitations
>  This function is not reentrant.
>  This function is synchronous.
>  Only available if ‘DemSupportJ1939Dcm’ is set to enabled.
Table 6-79   Dem_J1939DcmSetFreezeFrameFilter()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.2.9.10  Dem_J1939DcmReadDiagnosticReadiness1()
Prototype
Std_ReturnType Dem_J1939DcmReadDiagnosticReadiness1 (
Dem_J1939DcmDiagnosticReadiness1Type DataValue, uint8 NodeAddress )
Parameter
DataValue
Buffer of 8 bytes containing the contents of Diagnostic Readiness 1 (DM5)
computed by the Dem.
NodeAddress
The network management node ID to be filtered.
Return code
Std_ReturnType
>  E_OK: Operation was successful.
>  E_NOT_OK: Operation failed.
Functional Description
Returns the DM5 data

Particularities and Limitations
This function is not reentrant.
This function is synchronous.
Only available if ‘DemSupportJ1939Dcm’ is set to enabled.
OBDII is not supported
Table 6-80   Dem_J1939DcmReadDiagnosticReadiness1()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.3
Services used by Dem
In the following table services provided by other components, which are used by the Dem
are  listed.  For details about  prototype and functionality refer to the documentation of  the
providing component.
Component
API
Det
optional Dem_ReportErrorStatus
FiM
optional FiM_DemTriggerOnEventStatus
Dlt
optional Dlt_DemTriggerOnEventStatus
EcuM
optional EcuM_BswErrorHook
NvM
optional NvM_GetErrorStatus
optional NvM_SetRamBlockStatus
optional NvM_WriteBlock
Dcm
optional Dcm_DemTriggerOnDTCStatus
J1939Dcm
optional J1939Dcm_DemTriggerOnDTCStatus
SchM
optional SchM_Enter_Dem_<ExclusiveArea>
optional SchM_Exit_Dem_<ExclusiveArea>
Os
optional: GetCurrentApplicationID
Table 6-81   Services used by the Dem
6.3.1
EcuM_BswErrorHook()
Prototype
void EcuM_BswErrorHook ( uint16 BswModuleId, uint8 ErrorId )
Parameter
BswModuleId
Autosar ModuleId. The Dem will pass DEM_MODULE_ID.
ErrorId
Error code detailing the error cause, see Table 5-5
Return code
-
-
Functional Description
This function is called to report defunct configuration data passed to Dem_MasterPreInit.
The Dem will leave Dem_MasterPreInit after a call to this function, without initializing. Further calls to the
Dem module are not safe.
Particularities and Limitations
>  This function is called in error cases, when initializing only a Post-Build configurations
>  It is not safe if this function returns to the caller, especially if development error detection is disabled by
configuration.
Call context
>  This function is called from Dem_MasterPreInit()
Table 6-82   EcuM_BswErrorHook()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.4
Callback Functions
This chapter describes the callback functions that are implemented by the Dem and can
be invoked by other modules. The prototypes of the callback functions are provided in the
header file Dem_Cbk.h by the Dem.
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.4.1
Dem_NvM_JobFinished()
Prototype
Std_ReturnType Dem_NvM_JobFinished ( uint8 ServiceId, NvM_RequestResultType
JobResult )
Parameter
ServiceId
The ServiceId indicates which one of the asynchronous services triggered via
the operations of Interface NvM Service (Read/Write) the notification belongs
to.
The value is currently not used by the Dem.
JobResult
Provides the result of the asynchronous job.
NVM_REQ_OK: last asynchronous request has been finished successfully
NVM_REQ_NOT_OK: last asynchronous request has been finished
unsuccessfully
NVM_REQ_PENDING: not used in this context
NVM_REQ_INTEGRITY_FAILED: not used in this context
NVM_REQ_BLOCK_SKIPPED: not used in this context
NVM_REQ_NV_INVALIDATED: not used in this context
Return code
Std_ReturnType
E_OK: is always returned
Functional Description
Is triggered from NvM to notify that the requested job which is processed asynchronous has been finished.
Particularities and Limitations
>  This function is reentrant.
>  This function is asynchronous.
>  Must be configured for every Dem related NVRAM block
Expected Caller Context
>  This function can be called from any context.
Table 6-83   Dem_NvM_JobFinished()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.4.2
Dem_NvM_InitAdminData()
Prototype
Std_ReturnType Dem_NvM_InitAdminData ( void )
Parameter
N/A
N/A
Return code
Std_ReturnType
E_OK: is always returned
Functional Description
Initialize NvBlock for administrative data.
This function is supposed to be called by the NvM in order to (re)initialize the data in case the non-volatile
memory has never been stored, or was corrupted (see NvMBlockDescriptor/NvMInitBlockCallback).
This API is intended as callback function the NvM module. It will not mark the initialized block ‘changed’.
Particularities and Limitations
>  This function is not reentrant.
>  This function is synchronous.
Expected Caller Context
>  This function can be called from any context.
Table 6-84   Dem_NvM_InitAdminData()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.4.3
Dem_NvM_InitStatusData()
Prototype
Std_ReturnType Dem_NvM_InitStatusData ( void )
Parameter
N/A
N/A
Return code
Std_ReturnType
E_OK: is always returned
Functional Description
Initialize NvBlock for event status data.
This function is supposed to be called by the NvM in order to (re)initialize the data in case the non-volatile
memory has never been stored, or was corrupted (see NvMBlockDescriptor/NvMInitBlockCallback).
This API is intended as callback function the NvM module. It will not mark the initialized block ‘changed’.
Particularities and Limitations
>  This function is not reentrant.
>  This function is synchronous.
Expected Caller Context
>  This function can be called from any context.
Table 6-85   Dem_NvM_InitStatusData()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.4.4
Dem_NvM_InitDebounceData()
Prototype
Std_ReturnType Dem_NvM_InitDebounceData ( void )
Parameter
N/A
N/A
Return code
Std_ReturnType
E_OK: is always returned
Functional Description
Initialize NvBlock for event de-bounce data.
This function is supposed to be called by the NvM in order to (re)initialize the data in case the non-volatile
memory has never been stored, or was corrupted (see NvMBlockDescriptor/NvMInitBlockCallback).
This API is intended as callback function the NvM module. It will not mark the initialized block ‘changed’.
Particularities and Limitations
>  This function is not reentrant.
>  This function is synchronous.
Expected Caller Context
>  This function can be called from any context.
Table 6-86   Dem_NvM_InitDebounceData()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.4.5
Dem_NvM_InitEventAvailableData()
Prototype
Std_ReturnType Dem_NvM_InitEventAvailableData ( void )
Parameter
N/A
N/A
Return code
Std_ReturnType
E_OK: is always returned
Functional Description
Initialize NvBlock for event availability data.
This function is supposed to be called by the NvM in order to (re)initialize the data in case the non-volatile
memory has never been stored, or was corrupted (see NvMBlockDescriptor/NvMInitBlockCallback).
This API is intended as callback function the NvM module. It will not mark the initialized block ‘changed’.
Particularities and Limitations
>  This function is not reentrant.
>  This function is synchronous.
Expected Caller Context
>  This function can be called from any context.
Table 6-87   Dem_NvM_InitEventAvailableData()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.5
Configurable Interfaces
6.5.1
Callouts
At  its  configurable  interfaces  the  Dem  defines  callouts  that  can  be  mapped  to  callback
functions provided by other modules. The mapping is not statically defined by the Dem but
can be performed at configuration time. The function prototypes that can be used for the
configuration  have  to  match  the  appropriate  function  prototype  signatures,  which  are
described in the following sub-chapters.

6.5.1.1
CBClrEvt_<EventName>()
Prototype
Std_ReturnType CBClrEvt_<EventName> ( boolean* Allowed )
Parameter
Allowed
True – clearance of event is allowed
False – clearance of event is not allowed
Return code
Std_ReturnType
E_OK: Operation was successful
E_NOT_OK: Operation failed
Functional Description
Is triggered on DTC deletion to request the permission if the event may be cleared or not.
If the return value of the function call is other than E_OK the Dem clears the event for security reasons
without checking the Allowed value.
Particularities and Limitations
>  This function shall be reentrant.
>  This function shall be synchronous.
Call Context
>  This function is called from task context.
Table 6-88   CBClrEvt_<EventName>()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.5.1.2
CBDataEvt_<EventName>()
Prototype
Std_ReturnType CBDataEvt_<EventName> ( void )
Parameter
N/A
N/A
Return code
Std_ReturnType
Return value unused
Functional Description
Is triggered on changes of the event related data in the event memory.
Particularities and Limitations
>  This function shall be reentrant.
>  This function shall be synchronous.
>  This function signature deviates from [1] to match the Rte_Call signature.
Call Context
>  This function is called from task context.
Table 6-89   CBDataEvt_<EventName>()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.5.1.3
CBFaultDetectCtr_<EventName>()
Prototype
Std_ReturnType CBFaultDetectCtr_<EventName> ( sint8* FaultDetectionCounter )
Parameter
FaultDetectionCounter  This parameter receives the fault detection counter information (according
ISO 14229-1) of the requested EventId. If the return value of the function call
is other than E_OK this parameter does not contain valid data.

-128dec…127dec PASSED…FAILED according to [7]

Return code
Std_ReturnType
E_OK: request was successful
E_NOT_OK: request failed

Functional Description
Gets the current fault detection counter value for the requested monitor-internal de-bouncing event.
Particularities and Limitations
>  This function shall be reentrant.
>  This function shall be synchronous.
Call Context
>  This function is called from APIs with unrestricted call context.
Table 6-90   CBFaultDetectCtr_<EventName>()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.5.1.4
CBInitEvt_<EventName>()
Prototype
Std_ReturnType CBInitEvt_<EventName> ( Dem_InitMonitorReasonType
InitMonitorReason )
Parameter
InitMonitorReason
Specific (re-)initialization reason evaluated from the monitor to identify the
initialization kind to be performed.
DEM_INIT_MONITOR_CLEAR: Monitor of the EventId is cleared and all
internal values and states are reset
DEM_INIT_MONITOR_RESTART: Monitor of the EventId is requested to
restart

Return code
Std_ReturnType
Return value is unused.
Functional Description
(Re-)initializes the diagnostic monitor of a specific event.
Particularities and Limitations
>  This function shall be reentrant.
>  This function shall be synchronous.
Call Context
>  This function is called from task context.
Table 6-91   CBInitEvt_<EventName>()
6.5.1.5
CBInitFct_<N>()
Prototype
Std_ReturnType CBInitFct_<N> ( void )
Parameter
N/A
N/A
Return code
Std_ReturnType
Return value unused
Functional Description
Resets the diagnostic monitor of a specific function.
Particularities and Limitations
>  This function shall be reentrant.
>  This function shall be synchronous.
Call Context
>  This function is called from task context.
Table 6-92   CBInitFct_<N>()
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.5.1.6
CBReadData_<SyncDataElement>()
Prototype
Client/Server API
Std_ReturnType CBReadData_<SyncDataElement> ( uint8* Buffer )
Client/Server API with
Std_ReturnType CBReadData_<SyncDataElement> ( Dem_EventIdType
Event Id
EventId, uint8* Buffer )
Sender/Receiver APIs
Std_ReturnType CBReadData_<SyncDataElement> ( boolean* Data )
Std_ReturnType CBReadData_<SyncDataElement> ( uint8* Data )
Std_ReturnType CBReadData_<SyncDataElement> ( sint8* Data )
Std_ReturnType CBReadData_<SyncDataElement> ( uint16* Data )
Std_ReturnType CBReadData_<SyncDataElement> ( sint16* Data )
Std_ReturnType CBReadData_<SyncDataElement> ( uint32* Data )
Std_ReturnType CBReadData_<SyncDataElement> ( sint32* Data )
Std_ReturnType CBReadData_<SyncDataElement> ( uint8* Buffer )
Std_ReturnType CBReadData_<SyncDataElement> ( sint8* Buffer )
Parameter
Buffer
Buffer containing the value of the data element.
EventId
The EventId which has caused the trigger.
Return code
Std_ReturnType
E_OK: Operation was successful
E_NOT_OK: Operation failed
Functional Description
Requests the current value of the data element for freeze frame or extended data storage.
If the callback returns E_NOT_OK, the data is substituted by a pattern of 0xFF
Particularities and Limitations
>  This function shall be reentrant.
>  This function shall be synchronous.
Call Context
>  This function is called from task context.
Table 6-93   CBReadData_<SyncDataElement>()
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6.5.1.7
CBStatusDTC_<N>()
Prototype
Std_ReturnType CBStatusDTC_<N> ( uint32 DTC, uint8 DTCStatusOld, uint8
DTCStatusNew )
Parameter
DTC
Diagnostic Trouble Code in UDS format.
DTCStatusOld
DTC status ANDed with DTCStatusAvailabilityMask before change.
DTCStatusNew
DTC status ANDed with DTCStatusAvailabilityMask after change
Return code
Std_ReturnType
Return value unused
Functional Description
Is triggered on changes of the UDS DTC status byte. The trigger will not occur for changed status bits
which are disabled by the DTCStatusAvailabilityMask.
Particularities and Limitations
>  This function shall be reentrant.
>  This function shall be synchronous.
Call Context
>  This function is called from APIs with unrestricted call context.
Table 6-94   CBStatusDTC_<N>()
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6.5.1.8
CBStatusJ1939DTC_<N>()
Prototype
Std_ReturnType CBStatusJ1939DTC_<N> ( uint32 DTC, uint8 DTCStatusOld, uint8
DTCStatusNew )
Parameter
DTC
Diagnostic Trouble Code in J1939 format.
DTCStatusOld
DTC status ANDed with DTCStatusAvailabilityMask before change.
DTCStatusNew
DTC status ANDed with DTCStatusAvailabilityMask after change
Return code
Std_ReturnType
Return value unused
Functional Description
Is triggered on changes of the J1939 DTC status byte. The trigger will not occur for changed status bits
which are disabled by the DTCStatusAvailabilityMask.
Particularities and Limitations
>  This function shall be reentrant.
>  This function shall be synchronous.
Call Context
>  This function is called from APIs with unrestricted call context.
Table 6-95   CBStatusJ1939DTC_<N>()
6.5.1.9
CBStatusEvt_<EventName>_<N>()
Prototype
Std_ReturnType CBStatusEvt_<EventName>_<N> ( Dem_EventStatusExtendedType
EventStatusOld, Dem_EventStatusExtendedType EventStatusNew )
Parameter
EventStatusOld
UDS status byte of event before change.
EventStatusNew
UDS status byte of event after change.
Return code
Std_ReturnType
Return value unused
Functional Description
Triggers on changes of the status byte for the related EventId.
Particularities and Limitations
>  This function shall be reentrant.
>  This function shall be synchronous.
>  This function signature deviates from [1] to match the Rte_Call signature.
Call Context
>  This function is called from APIs with unrestricted call context.
Table 6-96   CBStatusEvt_<EventName>_<N>()
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6.5.1.10  GeneralCBDataEvt()
Prototype
Std_ReturnType GeneralCBDataEvt ( Dem_EventIdType EventId )
Parameter
EventId
The EventId which has caused the trigger
Return code
Std_ReturnType
Return value unused
Functional Description
Is triggered on changes of the event related data in the event memory.
Particularities and Limitations
>  This function shall be reentrant.
>  This function shall be synchronous.
>  This function signature deviates from [1] to match the Rte_Call signature.
Call Context
>  This function is called from task context.
Table 6-97   GeneralCBDataEvt()
6.5.1.11  GeneralCBStatusEvt()
Prototype
Std_ReturnType GeneralCBStatusEvt ( Dem_EventIdType EventId,
Dem_EventStatusExtendedType EventStatusOld, Dem_EventStatusExtendedType
EventStatusNew )
Parameter
EventId
The EventId which has caused the trigger.
EventStatusOld
UDS status byte of event before change.
EventStatusNew
UDS status byte of event after change.
Return code
Std_ReturnType
Return value unused
Functional Description
Triggers on changes of the status byte for the related EventId.
Particularities and Limitations
>  This function shall be reentrant.
>  This function shall be synchronous.
>  This function signature deviates from [1] to match the Rte_Call signature.
Call Context
>  This function is called from APIs with unrestricted call context.
Table 6-98   GeneralCBStatusEvt()
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6.5.1.12  <Module>_ClearDtcNotification
_<DemEventMemorySet>_<ShortName>()
Prototype
Std_ReturnType  <Module>_ClearDtcNotification_<DemEventMemorySet>_<ShortName>
(uint32 DTC, Dem_DTCFormatType DTCFormat, Dem_DTCOriginType DTCOrigin)
Parameter
DTC
The DTC number requested to be cleared
DTCFormat
The DTC format requested to be cleared
DTCOrigin
The DTC origin requested to be cleared
Return code
Std_ReturnType
Return value is not evaluated
Functional Description
Each notification function can be configured to be triggered either before ClearDTC is started, or after
ClearDTC has completed.
Particularities and Limitations
>  This function shall be reentrant.
>  This function shall be synchronous.
Call Context
>  This function is called from task context.
Table 6-99   <Module>_ClearDtcNotification_<DemEventMemorySet>
_<ShortName>()
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6.5.1.13  <Module>_DemTriggerOnMonitorStatus()
Prototype
void  <Module>_DemTriggerOnMonitorStatus (Dem_EventIdType EventId)
Parameter
EventId
The ID of the event with the monitor status change
Return code
-
-
Functional Description
Global notification function that is triggered with changes of the monitor status. It is called synchronously in
context of event status reporting.
There is no interface with this global notification, as the call context of this notification is the same as the
event status reporting context, which can be a BSW module context. Therefore the notification can’t be
routed by the RTE to a SW-C.
The actual name of the notification is specified through the configuration parameter
DemGeneral/DemGeneralCallbackMonitorStatusChangedFnc – the configuration value is not restricted to
the name pattern “<Module>_DemTriggerOnMonitorStatus”. For interaction with the Function Inhibition
Manager (FIM) use “FiM_DemTriggerOnMonitorStatus”.
Particularities and Limitations
>  This function shall be reentrant.
>  This function shall be synchronous.
>  This function signature deviates from [1] to match the FiM_DemTriggerOnMonitorStatus
signature.
Call Context
>  This function is called from APIs with unrestricted call context.
Table 6-100  <Module>_ DemTriggerOnMonitorStatus()

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6.5.1.14  ApplDem_SyncCompareAndSwap()
Prototype
boolean ApplDem_SyncCompareAndSwap (
  volatile unsigned int* AddressPtr,
  unsigned int OldValue,
  unsigned int NewValue
  )
Parameter
AddressPtr
Memory location to modify. The pointer is aligned to int.
OldValue
The comparison value
NewValue
The value to write
Return code
TRUE
The new value was written to AddressPtr
FALSE
The new value was not written to AddressPtr
Functional Description
The function is expected to implement the following operation atomically:
IF value at location AddressPtr EQUALS OldValue:
  STORE NewValue at location AddressPtr
  RETURN TRUE
OTHERWISE:
  RETURN FALSE

Many hardware platforms provide an operation which allows to implement this function with a single
instructions, e.g. CMPXCHG, or instructions to write such a function efficiently and lock free e.g.
LDREX/STREX and LDARX/STDCX
Particularities and Limitations
>  This function shall be reentrant
>  This function shall be synchronous
>  Providing this function is optional, the Dem can use a default implementation. Since the default
implementation is not optimized for the current platform it is strongly recommended to use this callout.
The configuration parameter DemGeneral/DemUserDefinedCompareAndSwap alters between.
>  When using the external callout function, the DEM typically needs a function prototype which is
delivered by adding an include file via parameter DemGeneral/DemHeaderFileInclusion.
Call context
>  This function is called from APIs with unrestricted call context.
Table 6-101  ApplDem_SyncCompareAndSwap()
6.6
Service Ports
6.6.1
Client Server Interface
A client server interface is related to a Provide Port at the server side and a Require Port
at client side.
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6.6.1.1
Provide Ports on Dem Side
At  the  Provide  Ports  of  the  Dem  the  API  functions  described  in  6.2  are  available  as
Runnable Entities. The Runnable Entities are invoked via Operations. The mapping from a
SWC client call to an Operation is performed by the RTE. In this mapping the RTE adds
Port Defined Argument Values to the client call of the SWC, if configured.
The  following  sub-chapters  present  the  Provide  Ports  defined  for  the  Dem  and  the
Operations defined for the Provide Ports, the API functions related to the Operations and
the Port Defined Argument Values to be added by the RTE.
6.6.1.1.1
DiagnosticMonitor
Port Defined Argument: Dem_EventIdType EventId
Operation
API Function
Arguments
SetEventStatus
Dem_SetEventStatus
IN Dem_EventStatusType
EventStatus,
ERR{E_NOT_OK}
ResetEventStatus
Dem_ResetEventStatus
ERR{E_NOT_OK}
ResetEventDebounceStatus
Dem_ResetEventDebounceStatus  ERR{E_NOT_OK}
PrestoreFreezeFrame1
Dem_PrestoreFreezeFrame
ERR{E_NOT_OK}
ClearPrestoredFreezeFrame1
Dem_ClearPrestoredFreezeFrame  ERR{E_NOT_OK}
SetEventDisabled2
Dem_SetEventDisabled
ERR{E_NOT_OK}
Table 6-102  DiagnosticMonitor
6.6.1.1.2
DiagnosticInfo and GeneralDiagnosticInfo
DiagnosticInfo has Port Defined Argument: Dem_EventIdType EventId
Operation
API Function
Arguments
GetEventStatus
Dem_GetEventUdsStatus
OUT Dem_UdsStatusByteType
UdsStatusByte,
ERR{E_NOT_OK}
GetEventUdsStatus
Dem_GetEventUdsStatus
OUT Dem_UdsStatusByteType
UdsStatusByte,
ERR{E_NOT_OK}
GetEventFailed
Dem_GetEventFailed
OUT boolean EventFailed,
ERR{E_NOT_OK}
GetEventTested
Dem_GetEventTested
OUT boolean EventTested,
ERR{E_NOT_OK}

1 Conditional: if configuration parameter DemGeneral/DemMaxNumberPrestoredFF > 0
2 Conditional: if OBD II support is licensed and configured in DemGeneral/DemOBDSupport
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Operation
API Function
Arguments
GetDTCOfEvent
Dem_GetDTCOfEvent
IN Dem_DTCFormatType DTCFormat,
OUT uint32 DTCOfEvent,
ERR{E_NOT_OK,
DEM_E_NO_DTC_AVAILABLE}
GetFaultDetectionCounter
Dem_
OUT sint8 FaultDetectionCounter,
GetFaultDetectionCounter
ERR{E_NOT_OK,
DEM_E_NO_FDC_AVAILABLE}
GetEventEnableCondition
Dem_GetEventEnableCondition  OUT boolean ConditionFullfilled
ERR{E_NOT_OK}
GetEventFreezeFrameDataEx
Dem_
IN uint8 RecordNumber,
GetEventFreezeFrameDataEx
IN uint16 DataId,
OUT Dem_MaxDataValueType
DestBuffer,
INOUT uint16 BufSize,
ERR{E_NOT_OK,
DEM_NO_SUCH_ELEMENT,
DEM_BUFFER_TOO_SMALL}
GetEventExtendedDataRecord
Dem_
IN uint8 RecordNumber,
Ex
GetEventExtendedDataRecord  OUT Dem_MaxDataValueType
DestBuffer,
INOUT uint16 BufSize,
ERR{E_NOT_OK,
DEM_NO_SUCH_ELEMENT,
DEM_BUFFER_TOO_SMALL}
GetDebouncingOfEvent
Dem_GetDebouncingOfEvent
OUT Dem_DebouncingStateType
DebouncingState,
ERR{E_NOT_OK}
GetMonitorStatus
Dem_GetMonitorStatus
OUT Dem_MonitorStatusType
MonitorStatus,
ERR{E_NOT_OK}
Table 6-103  DiagnosticInfo and GeneralDiagnosticInfo
6.6.1.1.3
OperationCycle
Port Defined Argument: uint8 OperationCycleId
Operation
API Function
Arguments
SetOperationCycleState
Dem_SetOperationCycleState
IN Dem_OperationCycleStateType
CycleState,
ERR{E_NOT_OK}
GetOperationCycleState
Dem_GetOperationCycleState  OUT Dem_OperationCycleStateType
CycleState,
ERR{E_NOT_OK}
Table 6-104  OperationCycle
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.6.1.1.4
AgingCycle
Not supported
6.6.1.1.5
ExternalAgingCycle
Not supported
6.6.1.1.6
EnableCondition
Port Defined Argument: uint8 EnableConditionId
Operation
API Function
Arguments
SetEnableCondition
Dem_SetEnableCondition
IN boolean ConditionFulfilled,
ERR{E_NOT_OK}
Table 6-105  EnableCondition
6.6.1.1.7
StorageCondition
Port Defined Argument: uint8 StorageConditionId
Operation
API Function
Arguments
SetStorageCondition
Dem_SetStorageCondition
IN boolean ConditionFulfilled,
ERR{E_NOT_OK}
Table 6-106  StorageCondition
6.6.1.1.8
IndicatorStatus
Port Defined Argument: uint8 IndicatorStatus
Operation
API Function
Arguments
GetIndicatorStatus
Dem_GetIndicatorStatus
OUT Dem_IndicatorStatusType
IndicatorStatus,
ERR{E_NOT_OK}
Table 6-107  IndicatorStatus
6.6.1.1.9
EventStatus
Port Defined Argument: Dem_EventIdType EventId
Operation
API Function
Arguments
SetWIRStatus
Dem_SetWIRStatus
IN boolean WIRStatus,
ERR{E_NOT_OK}
GetWIRStatus
Dem_GetWIRStatus
OUT boolean WIRStatus,
ERR{E_NOT_OK}
Table 6-108  EventStatus
6.6.1.1.10  EvMemOverflowIndication
Port Defined Arguments: uint8 ClientId, Dem_DTCOriginType DTCOrigin
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Operation
API Function
Arguments
GetEventMemoryOverflow
Dem_
OUT boolean OverflowIndication,
GetEventMemoryOverflow
ERR{E_NOT_OK}
GetNumberOfEventMemory Dem_GetNumberOfEventMemoryEn OUT uint8
Entries
tries
NumberOfEventMemoryEntries,
ERR{E_NOT_OK}
Table 6-109  EvMemOverflowIndication
6.6.1.1.11  DTCSuppression
Port Defined Argument: uint8 ClientId
Operation
API Function
Arguments
SetDTCSuppression
Dem_SetDTCSuppression
IN boolean SuppressionStatus ,
ERR{E_NOT_OK,
DEM_WRONG_DTC,
DEM_WRONG_DTCORIGIN,
DEM_PENDING}
GetDTCSuppression
Dem_GetDTCSuppression
OUT boolean SuppressionStatus,
ERR{E_NOT_OK,
DEM_WRONG_DTC,
DEM_WRONG_DTCORIGIN,
DEM_PENDING }
Table 6-110  DTCSuppression
6.6.1.1.12  DemServices
Operation
API Function
Arguments
GetDtcStatusAvailabilityMask
Dem_
IN uint8 ClientId,
GetDtcStatusAvailabilityMask
OUT uint8 DTCStatusMask,
ERR{E_NOT_OK}
GetPostRunRequested
Dem_
OUT boolean isRequested,
GetPostRunRequested
ERR{E_NOT_OK}
SynchronizeNvData1
Dem_
ERR{E_NOT_OK}
RequestNvSynchronization
Table 6-111   DemServices
6.6.1.1.13  DcmIf
The DcmIf PortInterface is a special case, not intended to be used by application software.
Instead, this interface is a means to establish the call contexts for application notification
callbacks  that  are  the  result  of  function  calls  to  the  Dem  by  the  Dcm.  The  interface
description is omitted intentionally for this reason.

1 Conditional: if configuration parameter DemGeneral/DemNvSynchronizeSupport == true
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6.6.1.1.14  ClearDTC
Port Defined Argument: uint8 ClientId
Operation
API Function
Arguments
SelectDTC
Dem_SelectDTC
IN uint32 DTC,IN
Dem_DTCFormatType DTCFormat,IN
Dem_DTCOriginType DTCOrigin
ERR{E_OK,
E_NOT_OK }
ClearDTC
Dem_
ERR{E_NOT_OK ,
ClearDTC
DEM_CLEAR_FAILED,
DEM_PENDING,
DEM_CLEAR_BUSY,
DEM_CLEAR_MEMORY_ERROR,
DEM_WRONG_DTC,
DEM_WRONG_DTCORIGIN}

6.6.1.2
Require Ports on Dem Side
At its Require Ports the Dem calls Operations. These Operations have to be provided by
the  SWCs  by  means  of  Runnable  Entities.  These  Runnable  Entities  implement  the
callback functions expected by the Dem.
The following sub-chapters present the Require Ports defined for the Dem, the Operations
that are called from the Dem and the related Callouts, which are described in chapter 6.5.

Note
If following interfaces are used as port interfaces without RTE, the function prefix
  Rte_Call will be replaced by the prefix Appl_Dem.

6.6.1.2.1
CBInitEvt_<EventName>
Operation
Callout
InitMonitorForEvent
Rte_Call_ CBInitEvt_<EventName>_InitMonitorForEvent
(EventName: DemEventParameter.shortname)
Table 6-112  CBInitEvt_<EventName>
6.6.1.2.2
CBInitFct_<DtcName>_
Operation
Callout
InitMonitorForFunction
Rte_Call_ CBInitFct_<DtcName>_<N> _InitMonitorForFunction
(DtcName: DemDTCClass.shortname,
N: counter per DemDTCClass)
Table 6-113  CBInitFct_<DtcName>_<N>
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.6.1.2.3
CBEventUdsStatusChanged
_<EventName>_<CallbackName>
Operation
Callout
CallbackEventUdsStatusChange Rte_Call_CBEventUdsStatusChanged_<EventName>_<CallbackName
d
> _CallbackEventUdsStatusChanged
(EventName: DemEventParameter.shortname,
CallbackName: DemCallbackEventStatusChanged.shortname)
Table 6-114  CBEventUdsStatusChanged_<EventName>_<CallbackName>
6.6.1.2.4
GeneralCBStatusEvt
Operation
Callout
GeneralCallbackEventUdsStatus Rte_Call_ GeneralCBStatusEvt
Changed
_GeneralCallbackEventUdsStatusChanged
Table 6-115  GeneralCBStatusEvt
6.6.1.2.5
CBStatusDTC_<CallbackName>
Operation
Callout
DTCStatusChanged
Rte_Call_ CBStatusDTC_<CallbackName>_DTCStatusChanged
(CallbackName: DemCallbackDTCStatusChanged.shortname)
Table 6-116  CBStatusDTC_<CallbackName>
6.6.1.2.6
CBDataEvt_<EventName>
Operation
Callout
EventDataChanged
Rte_Call_ CBDataEvt_<EventName>_EventDataChanged
(EventName: DemEventParameter.shortname)
Table 6-117  CBDataEvt_<EventName>
6.6.1.2.7
GeneralCBDataEvt
Operation
Callout
EventDataChanged
Rte_Call_ GeneralCBDataEvt _EventDataChanged
Table 6-118  GeneralCBDataEvt
6.6.1.2.8
CBClrEvt_<EventName>
Operation
Callout
ClearEventAllowed
Rte_Call_ CBClrEvt_<EventName>_ClearEventAllowed
(EventName: DemEventParameter.shortname)
Table 6-119  CBClrEvt_<EventName>
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
6.6.1.2.9
CBReadData_<SyncDataElement>
Operation
Callout
ReadData
Rte_Call_ CBReadData_<SyncDataElement> _ReadData
(SyncDataElement: DemDataClass.shortname)
Table 6-120  CBReadData_<SyncDataElement>
6.6.1.2.10  CBFaultDetectCtr_<EventName>
Operation
Callout
GetFaultDetectionCounter
Rte_Call_ CBFaultDetectCtr_<EventName>
_GetFaultDetectionCounter
(EventName: DemEventParameter.shortname)
Table 6-121  CBFaultDetectCtr_<EventName>
6.6.1.2.11  CBControlDTCSetting
Operation
Callout
ControlDTCSettingChanged
Rte_Call_CBControlDTCSetting_ControlDTCSettingChanged
Table 6-122  CBControlDTCSetting
6.6.1.2.12  DemSc
Operation
Callout
GetCurrentOdometer
Rte_Call_DemSc_ GetCurrentOdometer
GetExternalTesterStatus
Rte_Call_ DemSc_GetExternalTesterStatus
Table 6-123  DemSc
6.6.1.2.13  ClearDtcNotification
_<EventMemorySet>_<Notification>
Operation
Callout
ClearDtcNotification
Rte_Call_ClearDtcNotification_<EventMemorySet>_<Notification>_Cle
arDtcNotification
(EventMemorySet: DemEventMemorySet.shortname,
Notification: DemClearDTCNotification.shortname)
Table 6-124  ClearDtcNotification_<EventMemorySet>_<Notification>
6.7
Not Supported APIs
Operation
Dem_DcmGetOBDFreezeFrameData()
Dem_SetOperationCycleCntValue()
Dem_SetAgingCycleState()
Dem_SetAgingCycleCounterValue()
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Operation
Dem_DltGetMostRecentFreezeFrameRecordData()
Dem_DltGetAllExtendedDataRecords()
Dem_RepIUMPRFaultDetect()
Dem_RepIUMPRDenLock()
Dem_RepIUMPRDenRelease()
Dem_DcmGetInfoTypeValue08()
Dem_DcmGetInfoTypeValue0B()
Dem_DcmReadDataOfPID01()
Dem_DcmReadDataOfPID1C()
Dem_DcmReadDataOfPID21()
Dem_DcmReadDataOfPID30()
Dem_DcmReadDataOfPID31()
Dem_DcmReadDataOfPID41()
Dem_DcmReadDataOfPID4D()
Dem_DcmReadDataOfPID4E()
Dem_DcmReadDataOfOBDFreezeFrame()
Dem_DcmGetDTCOfOBDFreezeFrame()
Dem_SetPtoStatus()
Table 6-125 Not Supported APIs
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
7  Configuration
In the Dem the attributes can be configured with the following tools:
>  Configuration in GCE
>  Configuration in DaVinci Configurator
The configuration of post-build is described in [8] and [9].
7.1
Configuration Variants
The Dem supports the configuration variants
>  VARIANT-PRE-COMPILE
>  VARIANT-POST-BUILD-LOADABLE
>  VARIANT-POST-BUILD-SELECTABLE
The configuration classes of the Dem parameters depend on the supported configuration
variants. For their definitions please see the Dem_bswmd.arxml file.
7.2
Configurable Attributes
The description of each configurable option is described within the Dem_bswmd.arxml file.
You  can  use  the  online  help  of  DaVinci  Configurator  5  to  access  these  parameter
descriptions comfortably.
7.3
Configuration of Post-Build Loadable
This component uses a static RAM management which differs from the concept described
in the mentioned post-build documentation.
Since  all  RAM  buffers  scale  with  the  number  of  configured  events,  and  the  number  of
events  cannot  be  changed  during  post-build  time,  we  see  no  need  for  dynamic  RAM
management.
The  NVRAM  required is however also  not  covered by dynamic RAM management. NvM
cannot  change  its  memory  allocation,  so  this  is  a  restriction  by  necessity.  In  post-build
configurations,  the  Dem  can  reserve  some  NV  memory  for  snapshot  data  storage  using
parameter /DemGeneral/DemPostbuild/DemMaxSizeFreezeFrame.
It is mainly used to verify that configuration changes do not increase the required NVRAM
beyond the available amount. You can however increase its value if you need flexibility to
add DIDs to existing snapshot records.

Caution
The reserved NVRAM size cannot be reduced during post-build. Be aware of the
  additional wear on the Flash memory if FEE is used to back the Dem NV data.

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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
7.3.1
Supported Variance
Since much of the configuration of Dem can result in API changes, some restrictions apply
regarding which features and configuration elements can be modified after linking.
E.g.,  there  is  no  sensible  way  to  introduce  (and  implement)  additional  application
callbacks. All code has to be already present in the ECU; service ports must be connected
via  RTE. Also, it’s not generally possible to add arbitrary data to the NV data structures,
whose block sizes are static as well.
Generally,  Post-Build  Loadable  for  the  Dem  module  supports  modifying  an  existing
configuration, but not changing it structurally. The exhaustive list of parameters that can be
modified using Post-Build Loadable is documented in the Dem parameter description file
(BSWMD file). The list below is only intended as short outline.
>  DTC numbers
>  De-bouncing parameters
>  Step sizes and thresholds
>  Qualification time
>  DTC operation cycle
>  DID numbers
>  DIDs contained in snapshots
>  Restricted by the amount of reserved NV data

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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
8  AUTOSAR Standard Compliance
8.1
Deviations
Deviation
Comment
DemGetNextFilteredDTCAndFDC()  If monitor internal de-bouncing is used the Dem
requests the application for the fault detection counter.
To implement the necessary call sequence definition,
the Dem provides this interface as part of PortInterface
DcmIf.
Dem_J1939DcmGetNextSPNIn
The interface is not supported and therefore will
FreezeFrame()
always return.
DEM_FILTERED_NO_MATCHING_ELEMENT. The
intended functionality is implemented in the Vector
J1939Dcm.
Operation cycle handling
Only the Operation Cycle using the ‘Autostart’ option is
considered active before initialization. This is different
from the Autosar standard, which defines to set all
cycles to active, and undo the effects for cycles not
started at initialization time.
CBStatusEvt
and
CBtDataEvt  The signature of these callbacks is expected to match
Notification signature
Rte_Call (see chapter 6.5.1 Callouts). Notifications
with return type ‘void’ are not possible.
Dem_J1939DcmClearDTC()
This API can also be called for DTCOrigin
DEM_DTC_ORIGIN_SECONDARY_MEMORY.
Dem_J1939DcmSetDTCFilter()
This API can also be called for DTCOrigin
DEM_DTC_ORIGIN_SECONDARY_MEMORY.
Table 8-1   Deviations
8.2
Additions/ Extensions
Extension
Comment
Dem_InitMemory()
see 6.2.5.7
Dem_PostRunRequested()
see 6.2.6.23
Dem_GetEventEnableCondition()
see 6.2.6.20
Extension of
see 6.5.1.6
CBReadData_<SyncDataElement>()
Table 8-2   Extensions
8.3
Limitations
Limitation
Comment
Enable Conditions
Maximum number of Enable Conditions is limited to 254.
Operation Cycles
Maximum number of Operation Cycles is limited to 16 for efficiency
reasons.
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
Limitation
Comment
Aging Threshold
Maximum possible aging cycles are limited to 255 (from 256) for
efficiency reasons.
Non-Volatile storage
Configuration option DemStatusBitStorageTestFailed == false will
reset the Test Failed bit during initialization, but it will be stored in
NVRAM anyways.
DemGroupOfDTC
Configuration of DTC groups is limited to 4. These are intended to be
used to support the Powertrain, Body, Chassis and Network
groupings defined by ISO 15031-6.
Different definitions may not work as intended.
Snapshot Record/ Freeze  Interface Dem_GetEventFreezeFrameDataEx() will return the
Frame
most recent record only if the records are configured as “Calculated”.
Interface Dem_GetEventFreezeFrameDataEx() will return
E_NOT_OK if the records are configured as “Configured” and the
requested record is 0xFF.
Internal Data Elements
The internal data elements which can be mapped into an extended
data or snapshot record will always have their current internal values
at the time the data is read out.
This will not apply to the following elements as they are static
configuration elements: Significance, Priority, OBD DTC, root cause
Event Id
J1939 DTC
If the DTC class has configured a J1939 DTC then an UDS DTC
must be also available.
J1939NmNodes
Maximum number of different nodes is limited to 255 (from 256) for
efficiency reasons.
J1939 Indicators
An event is only allowed to support one J1939 related indicators
(RSL, AWL, PL). The MIL indicator is not supported.
J1939 Freeze Frame and  Only one global defined J1939 Freeze Frame and one global J1939
Expanded Freeze Frame  Expanded Freeze Frame is supported.
De-bounce counter
This feature is limited to counter based de-bounced events only.
storage in NVRAM
BSW events which are reported before initialization of DEM
(Dem_MasterInit()) must not use this feature.
DTC selection
DEM_DTC_FORMAT_OBD is not supported while selecting a single
DTC with function Dem_SelectDTC().
Table 8-3
Limitations
8.4
Not Supported Service Interfaces
The following table contains service interfaces which are not supported from Dem.
Port
Operation(s)
AgingCycle
SetAgingCycleState
ExternalAgingCycle
SetAgingCycleCounterValue
PowerTakeOff
SetPtoStatus
Table 8-4   Service Interfaces which are not supported
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)

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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
9  Glossary and Abbreviations
9.1
Glossary
Term
Description
DaVinci Configurator 5  Configuration and code generation tool for MICROSAR components
Combined Event
The combination of multiple events into a combined status.
Warning Indicator
The warning indicator managed by the Dem only provides the
information that the related indicator (e.g. lamp in the dashboard) shall
be requested, the de-/activation must be handled by the application or a
different ECU.
Each event that currently requests an indicator will have set the warning
indicator requested bit in the status byte.
Table 9-1   Glossary
9.2
Abbreviations
Abbreviation
Description
API
Application Programming Interface
AUTOSAR
Automotive Open System Architecture
AWL
Amber Warning Lamp
BSW
Basic Software
BSWMD
Basic Software Module Description
Cfg5
DaVinci Configurator 5
CPU
Central Processing Unit
Dcm
Diagnostic Communication Manager
DCY
Driving Cycle
Dem
Diagnostic Event Manager
Det
Development Error Tracer
Dlt
Diagnostic Log and Trace
DTC
Diagnostic Trouble Code
EAD
Embedded Architecture Designer
ECU
Electronic Control Unit
EcuM
Ecu Manager
EEPROM
Electrically Erasable Programmable Read-Only Memory
FDC
Fault Detection Counter
FEE
Flash EEPROM Emulation
GCE
Generic Content Editor
HIS
Hersteller Initiative Software
ID
Identification
ISR
Interrupt Service Routine
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Technical Reference MICROSAR Diagnostic Event Manager (Dem)
MICROSAR
Microcontroller Open System Architecture (the Vector AUTOSAR
solution)
MIL
Malfunction Indicator Lamp
NVRAM
Non-volatile Random Access Memory
NvM
NVRAM Manager
OBD
On Board Diagnostics
OCC
Occurrence Counter
OS
AUTOSAR compliant Operating System
PL
Protect Lamp
PPort
Provided Port
RAM
Random Access Memory
ROE
Response On Event
ROM
Read-Only Memory
RPort
Required Port
RSL
Red Stop Lamp
Rte
Runtime Environment
SAE
Society of Automotive Engineers
SchM
Schedule Manager
SRS
Software Requirement Specification
SWC
Software Component
SWS
Software Specification
UDS
Unified Diagnostic Services
WUC
Warmup Cycle
Table 9-2 Abbreviations
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Document Outline

Last modified October 12, 2025: Initial commit (af72ad2)