FordMsg3CABusHiSpd_MDD

Module Design Document

For

FordMsg3CABusHiSpd

04-May-2018

Prepared For:

Software Engineering

Nexteer Automotive,

Saginaw, MI, USA

Prepared By:

TATA ELXSI,

INDIA

Change History

Table of Contents

Table of Contents 3

1 Introduction 5

1.1 Purpose 5

1.2 Scope 5

2 FordMsg3CABusHiSpd & High-Level Description 6

3 Design details of software module 7

3.1 Graphical representation of FordMsg3CABusHiSpd 7

3.2 Data Flow Diagram 7

3.2.1 Component level DFD 7

3.2.2 Function level DFD 7

4 Constant Data Dictionary 8

4.1 Program (fixed) Constants 8

4.1.1 Embedded Constants 8

5 Software Component Implementation 9

5.1 Sub-Module Functions 9

5.1.1 Init: FordMsg3CABusHiSpdInit1 9

5.1.2 Per: FordMsg3CABusHiSpdPer1 9

5.2 Server Runables 9

5.3 Interrupt Functions 9

5.4 Module Internal (Local) Functions 9

5.4.1 Local Function #1 9

5.4.1.1 Design Rationale 10

5.4.1.2 Processing 10

5.4.2 Local Function #2 10

5.4.2.1 Design Rationale 10

5.4.2.2 Processing 10

5.4.3 Local Function #3 10

5.4.3.1 Design Rationale 10

5.4.3.2 Processing 11

5.4.4 Local Function #4 11

5.4.4.1 Design Rationale 11

5.4.4.2 Processing 11

5.4.5 Local Function #5 11

5.4.5.1 Design Rationale 11

5.4.5.2 Processing 11

5.4.6 Local Function #6 11

5.4.7 Design Rationale 12

5.4.7.1 Processing 12

5.4.7 Local Function #7 12

5.4.7.1 Design Rationale 13

5.4.7.2 Processing 13

5.4.8 Local Function #8 13

5.4.8.1 Design Rationale 13

5.4.8.2 Processing 13

5.4.9 Local Function #9 13

5.4.9.1 Design Rationale 14

5.4.9.2 Processing 14

5.5 GLOBAL Function/Macro Definitions 14

6 Known Limitations with Design 15

7 UNIT TEST CONSIDERATION 16

Appendix A Abbreviations and Acronyms 17

Appendix B Glossary 18

Appendix C References 19

Introduction

Purpose

Module Design Document for MM073A_FordMsg3CABusHiSpd_Impl.

Scope

The following definitions are used throughout this document:

• 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.

FordMsg3CABusHiSpd & High-Level Description

The purpose of the Ford Message 3CA Bus High Speed function is to provide the Electric Power Steering system with signal values for Lane Detection Warning and Lane Keep Assist functions form CAN. The Ford Message 3CA function will perform the missing message and signal invalid diagnostics as well as provide a validity signal for the signal values and received message.

Design details of software module

Graphical representation of FordMsg3CABusHiSpd

Data Flow Diagram

Refer FDD

Component level DFD

Refer FDD

Function level DFD

Refer FDD

Constant Data Dictionary

Program (fixed) Constants

Embedded Constants

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: FordMsg3CABusHiSpdInit1

Design Rationale

Refer FDD

Module Outputs

Refer FDD

Per: FordMsg3CABusHiSpdPer1

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 Runnables

ComIPduCallout_Lane_Assist_Data1_FD1

5.2.1.1 Design Rationale

None

5.2.1.2 Processing of function

None

ComTimeoutNotification_LaCurvature_No_Calc

5.2.2.1 Design Rationale

None

5.2.2.2 Processing of function

None

Interrupt Functions

None

Module Internal (Local) Functions

Local Function #1

Design Rationale

None

Processing

Please refer to the below path in the FDD model.

MM073A_FordMsg3CABusHiSpd/FordMsg3CABusHiSpd/FordMsg3CABusHiSpdPer1/DiagEna

Local Function #2

Design Rationale

None

Processing

Please refer to the below path in the FDD model.

MM073A_FordMsg3CABusHiSpd/FordMsg3CABusHiSpd/FordMsg3CABusHiSpdPer1/CalSeln

Local Function #3

Design Rationale

None

Processing

Please refer to the below path in the FDD model.

MM073A_FordMsg3CABusHiSpd/FordMsg3CABusHiSpd/FordMsg3CABusHiSpdPer1/MsgMiss/MissMsgNtcFail, MM073A_FordMsg3CABusHiSpd/FordMsg3CABusHiSpd/FordMsg3CABusHiSpdPer1/MsgMiss/MissNtcPassTmrRst

Local Function #5

Design Rationale

None

Processing

Please refer to the below path in the FDD model.

MM073A_FordMsg3CABusHiSpd/FordMsg3CABusHiSpd/FordMsg3CABusHiSpdPer1/MsgPrsnt/FordVehPrpnWhlTqSigInvldNtc

Local Function #6

Design Rationale

None

Processing

Please refer to the below path in the FDD model.

MM073A_FordMsg3CABusHiSpd/FordMsg3CABusHiSpd/FordMsg3CABusHiSpdPer1/MsgPrsnt/OutputProcg

Local Function #7

Design Rationale

None

Processing

Please refer to the below path in the FDD model.

MM073A_FordMsg3CABusHiSpd/FordMsg3CABusHiSpd/FordMsg3CABusHiSpdPer1/MsgPrsnt/OutputProcg/VldProcg

Local Function #8

Design Rationale

None

Processing

Please refer to the below path in the FDD model.

MM073A_FordMsg3CABusHiSpd/FordMsg3CABusHiSpd/FordMsg3CABusHiSpdPer1/MsgPrsnt/OutputProcg/VldElpdTi

Local Function #9

Design Rationale

None

Processing

Please refer to the below path in the FDD model.

MM073A_FordMsg3CABusHiSpd/FordMsg3CABusHiSpd/FordMsg3CABusHiSpdPer1/MsgPrsnt/OutputProcg/ChkElpdTi

GLOBAL Function/Macro Definitions

None

Known Limitations with Design

None

UNIT TEST CONSIDERATION

None

Abbreviations and Acronyms

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

References