GmStrtStop_MDD
Module Design Document
For
GmStrtStop
June 27, 2016
Prepared For:
Software Engineering
Nexteer Automotive,
Saginaw, MI, USA
Prepared By:
Nick Saxton
Nexteer Automotive,
Saginaw, MI, USA
Change History
| Description | Author | Version | Date |
| Initial Version | Sankardu Varadapureddi | 1 | 1-Oct-2015 |
| Added local function GetTmrElpsdThd | Nick Saxton | 2 | 4-Feb-2016 |
| Updated for FDD v1.3.0 | Nick Saxton | 3 | 27-Jun-2016 |
Table of Contents
2 GmStrtStop High-Level Description 6
3 Design details of software module 7
3.1 Graphical representation of GmStrtStop 7
4.1 Program (fixed) Constants 8
5 Software Component Implementation 9
5.1.2.2 Store Module Inputs to Local copies 9
5.1.2.3 (Processing of function)……… 9
5.1.2.4 Store Local copy of outputs into Module Outputs 9
5.4 Module Internal (Local) Functions 9
5.5 GLOBAL Function/Macro Definitions 11
6 Known Limitations with Design 13
Appendix A Abbreviations and Acronyms 15
Introduction
Purpose
Scope
GmStrtStop High-Level Description
Refer to FDD
Design details of software module
Graphical representation of GmStrtStop
Data Flow Diagram
Refer FDD
Component level DFD
Function level DFD
Constant Data Dictionary
Program (fixed) Constants
Embedded Constants
Refer .m file
Software Component Implementation
Sub-Module Functions
Init: None
Per: GmStrtStopPer1
Design Rationale
Refer FDD for the overall functionality.
Store Module Inputs to Local copies
Refer FDD
(Processing of function)………
Refer FDD
Store Local copy of outputs into Module Outputs
Refer FDD
Server Runables
None
Interrupt Functions
None
Module Internal (Local) Functions
Local Function #1
| Function Name | DtrmnRateLim | Type | Min | Max | |
| Arguments Passed | ActSt_Cnt_T_u08 | uint8 | 0 | 5 | |
| VehStrtStopSt_Cnt_T_u08 | uint8 | 0 | 5 | ||
| Return Value | VehStrtStopRampRate_UlsPerSec_T_f32 | float32 | 0 | 5 | |
Description
Determination of 'VehStrtStopRampRate_UlsPerSec_T_f32' for different mode transitions.
Local Function #2
| Function Name | NormModExitCdnsChk | Type | Min | Max | |
| Arguments Passed | EngSpd_Rpm_T_f32 | float32 | 0 | 5110 | |
| VehSpd_Kph_T_f32 | float32 | 0 | 511 | ||
| *VehStrtStopSt_Cnt_T_u08 | uint8 | 0 | 5 | ||
| *VehStrtStopMotTqCmdSca_Uls_T_f32 | float32 | 0 | 1 | ||
| Return Value | None | ||||
Description
This function validates conditions for all state transitions from 'Normal mode'. ‘*VehStrtStopSt_Cnt_T_u08’ and ‘*VehStrtStopMotTqCmdSca_Uls_T_f32’ are outputs of this function.
Local Function #3
| Function Name | Inter1ModExitCdnsChk | Type | Min | Max | |
| Arguments Passed | EngSpd_Rpm_T_f32 | float32 | 0 | 5110 | |
| VehSpd_Kph_T_f32 | float32 | 0 | 511 | ||
| HwVel_HwRadPerSec_T_f32 | float32 | -42 | 42 | ||
| HwTq_HwNwtMtr_T_f32 | float32 | -10 | 10 | ||
| ToStopModFlg_T_logl | boolean | FALSE | TRUE | ||
| *VehStrtStopSt_Cnt_T_u08 | uint8 | 0 | 5 | ||
| *VehStrtStopMotTqCmdSca_Uls_T_f32 | float32 | 0 | 1 | ||
| Return Value | None | ||||
Description
This function validates conditions for all state transitions from ‘Intermediate 1 mode’.
‘*VehStrtStopSt_Cnt_T_u08’ and ‘*VehStrtStopMotTqCmdSca_Uls_T_f32’ are outputs of this function.
Local Function #4
| Function Name | StopModExitCdnsChk | Type | Min | Max | |
| Arguments Passed | EngSpd_Rpm_T_f32 | float32 | 0 | 5110 | |
| VehSpd_Kph_T_f32 | float32 | 0 | 511 | ||
| *VehStrtStopSt_Cnt_T_u08 | uint8 | 0 | 5 | ||
| *VehStrtStopMotTqCmdSca_Uls_T_f32 | float32 | 0 | 1 | ||
| Return Value | None | ||||
Description
This function validates conditions for all state transitions from ‘Stop mode’. ‘*VehStrtStopSt_Cnt_T_u08’ and ‘*VehStrtStopMotTqCmdSca_Uls_T_f32’ are outputs of this function.
Local Function #5
| Function Name | Inter2ModExitCdnsChk | Type | Min | Max | |
| Arguments Passed | EngSpd_Rpm_T_f32 | float32 | 0 | 5110 | |
| VehSpd_Kph_T_f32 | float32 | 0 | 511 | ||
| HwVel_HwRadPerSec_T_f32 | float32 | -42 | 42 | ||
| HwTq_HwNwtMtr_T_f32 | float32 | -10 | 10 | ||
| ToStopModFlg_T_logl | boolean | FALSE | TRUE | ||
| *VehStrtStopSt_Cnt_T_u08 | uint8 | 0 | 5 | ||
| *VehStrtStopMotTqCmdSca_Uls_T_f32 | float32 | 0 | 1 | ||
| Return Value | None | ||||
Description
This function validates conditions for all state transitions from 'Intermediate 2 mode'.
‘*VehStrtStopSt_Cnt_T_u08’ and ‘*VehStrtStopMotTqCmdSca_Uls_T_f32’ are outputs of this function.
Local Function #6
| Function Name | GetTmrElpsdThd | Type | Min | Max | |
| Arguments Passed | StrtStopStChk_Cnt_T_u08 | uint8 | 0 | 5 | |
| *RefTmr_Cnt_T_u32 | uint32 | 0 | 4294967295 | ||
| ModTmrThd_MilliSec_T_f32 | float32 | 0 | 5000 | ||
| Return Value | TmrElpsdThd_Cnt_T_logl | boolean | FALSE | TRUE | |
Description
This function determines whether exit conditions for states Mod1 and Mod2 have been valid for a long enough period of time.
Design Rationale
This function was created to avoid duplicate code and lower static path count and cyclomatic complexity.
GLOBAL Function/Macro Definitions
None
Known Limitations with Design
UNIT TEST CONSIDERATION
None
Abbreviations and Acronyms
| Abbreviation or Acronym | Description |
|---|---|
Glossary
Note: Terms and definitions from the source “Nexteer Automotive” take precedence over all other definitions of the same term. Terms and definitions from the source “Nexteer Automotive” are formulated from multiple sources, including the following:
ISO 9000
ISO/IEC 12207
ISO/IEC 15504
Automotive SPICE® Process Reference Model (PRM)
Automotive SPICE® Process Assessment Model (PAM)
ISO/IEC 15288
ISO 26262
IEEE Standards
SWEBOK
PMBOK
Existing Nexteer Automotive documentation
| Term | Definition | Source |
|---|---|---|
| MDD | Module Design Document | |
| DFD | Data Flow Diagram |
References
| Ref. # | Title | Version |
|---|---|---|
| 1 | AUTOSAR Specification of Memory Mapping (Link:AUTOSAR_SWS_MemoryMapping.pdf) | v1.3.0 R4.0 Rev 2 |
| 2 | MDD Guideline | EA4 01.00.01 |
| 3 | Software Naming Conventions.doc | EA4 01.00.00 |
| 4 | Software Design and Coding Standards.doc | 2.1 |
| 5 | FDD : CF012A_ GmStrtStop_Design | See Synergy sub project version |