Shall: indicates a mandatory requirement without exception in compliance.
Should: indicates a mandatory requirement; exceptions allowed only with documented justification.
May: indicates an optional action.

BmwDrvgDynStMac & High-Level Description

The component implements the functionality of Driving Dynamics State Machine. It is based on requirements for DD State Machine in LH10716411 starting from ID_6159. It outputs signals for CF083A and CF040A.

Design details of software module

Graphical representation of BmwDrvgDynStMac

Data Flow Diagram

Refer FDD

Component level DFD

None

Function level DFD

None

Constant Data Dictionary

Program (fixed) Constants

Embedded Constants

Local Constants

Constant Name	Resolution	Units	Value
*

*Refer FDD for local constants

Software Component Implementation

Sub-Module Functions

The sub-module functions are grouped based on similar functionality that needs to be executed in a given “State” of the system (refer States and Modes). For a given module, the MDD will identify the type and number of sub-modules required. The sub-module types are described below.

Init: BmwDrvgDynStMacInit1

Design Rationale

Refer FDD

Module Outputs

None

Per: BmwDrvgDynStMacPer1

Design Rationale

Refer FDD

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 DetermineErrorMode

Function Name	DetermineErrorMode	Type	Min	Max
Arguments Passed	SysStFltOutpReqDi_Cnt_T_logl	boolean	0	1
	DiagcStsNonRcvrlReqDiFltPrsnt_Cnt_T_logl	boolean	0	1
	DiagcStsCtrldShtDwnFltPrsnt_Cnt_T_logl	boolean	0	1
	StsSteerAssi_Cnt_T_enum	enum	0	1
	BmwVehCdn_Cnt_T_enum	enum	1	15
Return Value	ErrMod_Cnt_T_logl	boolean	FALSE	TRUE

Design Rationale

Implementation of "DetermineErrorMode" Simulink block

Processing

Refer FDD

Local Function Fac

Function Name	Fac	Type	Min	Max
Arguments Passed	EffortCmdSca_Uls_T_f32	float32	1	2
	DampgCmdSca_Uls_T_f32	float32	0	1
	RtnCmdSca_Uls_T_f32	float32	0	1
Return Value	Fac_Cnt_T_logl	boolean	FALSE	TRUE

Design Rationale

Implementation of "Fac" Simulink block

Processing

Refer FDD

Local Function AssiLvlCnd

Function Name	AssiLvlCnd	Type	Min	Max
Arguments Passed	MotTqCmdPwrLimd_MotNwtMtr_T_f32	float32	-8.8	8.8
Return Value	MotTqCmdPwrLimdActvtUppr_Cnt_T_logl	boolean	FALSE	TRUE
	MotTqCmdPwrLimdActvtLowr_Cnt_T_logl	boolean	FALSE	TRUE
	MotTqCmdPwrLimdDeactvtLowr_Cnt_T_logl	boolean	FALSE	TRUE

Design Rationale

Implementation of "AssiLvlCnd" Simulink block

Processing

Refer FDD

Local Function CheckActivityTime

Function Name	CheckActivityTime	Type	Min	Max
Arguments Passed	MotTqCmdPwrLimdCdnActvt_Cnt_T_logl	boolean	FALSE	TRUE
Return Value	MotTqCmdPwrLimdActvt_Cnt_T_logl	boolean	FALSE	TRUE

Design Rationale

Implementation of "CheckActivity Time" Simulink block

Processing

Refer FDD

Local Function CheckDeactivateTime

Function Name	CheckDeactivateTime	Type	Min	Max
Arguments Passed	MotTqCmdPwrLimdCdnDeactvt_Cnt_T_logl	boolean	FALSE	TRUE
Return Value	MotTqCmdPwrLimdDeactvt_Cnt_T_logl	boolean	FALSE	TRUE

Design Rationale

Implementation of "CheckDeactivate Time" Simulink block

Processing

Refer FDD

Local Function ErrorIfTi

Function Name	ErrorIfTi	Type	Min	Max
Arguments Passed	ErrIf_Cnt_T_logl	boolean	FALSE	TRUE
Return Value	ErrIfTi_Cnt_T_logl	boolean	FALSE	TRUE

Design Rationale

Implementation of "ErrorIfTi" Simulink block

Processing

Refer FDD

Local Function StateMachine

Function Name	StateMachine	Type	Min	Max
Arguments Passed	ErrMod_Cnt_T_logl	boolean	FALSE	TRUE
	AllwTran_Cnt_T_logl	boolean	FALSE	TRUE
	ErrIf_Cnt_T_logl	boolean	FALSE	TRUE
	BmwTarHwTqOvrlQlfr_Cnt_T_enum	enum	2	15
	BmwDrvgDynFacQlfr_Cnt_T_enum	enum	2	15
	BmwTarSteerTqDrvrActrQlfr_Cnt_T_enum	enum	2	15
	BmwTrfcJamAssiDampgStReq_Cnt_T_enum	enum	1	15
	Fac_Cnt_T_logl	boolean	FALSE	TRUE
	MotTqCmdOvrlEquZero_Cnt_T_logl	boolean	FALSE	TRUE
	MotTqCmdPwrLimd_MotNwtMtr_T_f32	float32	-8.8	8.8
Return Value	N/A

Design Rationale

Implementation of "StateMachine" Simulink state machine

Processing

Refer FDD

Local Function StateMachineInit

Function Name	StateMachineInit	Type	Min	Max
Arguments Passed	ErrMod_Cnt_T_logl	boolean	FALSE	TRUE
	AllwTran_Cnt_T_logl	boolean	FALSE	TRUE
	ErrIf_Cnt_T_logl	boolean	FALSE	TRUE
	BmwTarHwTqOvrlQlfr_Cnt_T_enum	enum	2	15
	BmwDrvgDynFacQlfr_Cnt_T_enum	enum	2	15
	BmwTarSteerTqDrvrActrQlfr_Cnt_T_enum	enum	2	15
	BmwTrfcJamAssiDampgStReq_Cnt_T_enum	enum	1	15
	MotTqCmdPwrLimdActvtUppr_Cnt_T_logl	boolean	FALSE	TRUE
	MotTqCmdPwrLimdActvtLowr_Cnt_T_logl	boolean	FALSE	TRUE
Return Value	N/A

Design Rationale

Implementation of INIT State

Processing

Refer FDD

Local Function StateMachineIfAvl

Function Name	StateMachineIfAvl	Type	Min	Max
Arguments Passed	ErrMod_Cnt_T_logl	boolean	FALSE	TRUE
	AllwTran_Cnt_T_logl	boolean	FALSE	TRUE
	ErrIf_Cnt_T_logl	boolean	FALSE	TRUE
	BmwTarHwTqOvrlQlfr_Cnt_T_enum	enum	2	15
	BmwDrvgDynFacQlfr_Cnt_T_enum	enum	2	15
	BmwTarSteerTqDrvrActrQlfr_Cnt_T_enum	enum	2	15
	BmwTrfcJamAssiDampgStReq_Cnt_T_enum	enum	1	15
	MotTqCmdPwrLimdDeactvtLowr_Cnt_T_logl	boolean	FALSE	TRUE
Return Value	N/A

Design Rationale

Implementation of IF_AVL State

Processing

Refer FDD

Local Function StateMachineIfActv

Function Name	StateMachineIfActv	Type	Min	Max
Arguments Passed	ErrMod_Cnt_T_logl	boolean	FALSE	TRUE
	AllwTran_Cnt_T_logl	boolean	FALSE	TRUE
	ErrIf_Cnt_T_logl	boolean	FALSE	TRUE
	BmwTarHwTqOvrlQlfr_Cnt_T_enum	enum	2	15
	BmwDrvgDynFacQlfr_Cnt_T_enum	enum	2	15
	BmwTarSteerTqDrvrActrQlfr_Cnt_T_enum	enum	2	15
	BmwTrfcJamAssiDampgStReq_Cnt_T_enum	enum	1	15
	ErrIfTi_Cnt_T_logl	boolean	FALSE	TRUE
Return Value	N/A

Design Rationale

Implementation of IF_ACTV State

Processing

Refer FDD

Local Function StateMachineStbEpsSts

Function Name	StateMachineStbEpsSts	Type	Min	Max
Arguments Passed	ErrMod_Cnt_T_logl	boolean	FALSE	TRUE
	AllwTran_Cnt_T_logl	boolean	FALSE	TRUE
	ErrIf_Cnt_T_logl	boolean	FALSE	TRUE
	BmwTarHwTqOvrlQlfr_Cnt_T_enum	enum	2	15
	BmwDrvgDynFacQlfr_Cnt_T_enum	enum	2	15
	BmwTarSteerTqDrvrActrQlfr_Cnt_T_enum	enum	2	15
	BmwTrfcJamAssiDampgStReq_Cnt_T_enum	enum	1	15
	Fac_Cnt_T_logl	boolean	FALSE	TRUE
	MotTqCmdOvrlEquZero_Cnt_T_logl	boolean	FALSE	TRUE
	MotTqCmdPwrLimdActvtUppr_Cnt_T_logl	boolean	FALSE	TRUE
Return Value	N/A

Design Rationale

Implementation of STB_EPS_STS State

Processing

Refer FDD

Local Function StateMachineEntry

Function Name	StateSrvNotAvlStbEpsSts	Type	Min	Max
Arguments Passed	N/A
Return Value	DrvgDynActv_Cnt_T_logl	boolean	FALSE	TRUE
	DrvgDynIfSt_Cnt_T_enum	enum	32	255
	OutpTqOvrlRampInEna_Cnt_T_logl	boolean	FALSE	TRUE

Design Rationale

Implementation of "StateMachine" Entry sections

Processing

Refer FDD

GLOBAL Function/Macro Definitions

None

Known Limitations with Design

None

UNIT TEST CONSIDERATION

None

Abbreviations and Acronyms

Abbreviation or Acronym	Description
FDD	Functional Design Document. (See references)

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)	v1.4.0 R4.0 Rev 3
2	MDD Guideline EA4	1.02
3	EA4 Software Naming Conventions	1.01
4	Software Design and Coding Standards	2.01
5	CF089A_BmwDrvgDynStMac_Design	See Synergy Sub Project Version

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