FordMsg217BusHiSpd_MDD

Module Design Document

For

FordMsg217BusHiSpd

June 19, 20157

Prepared For:

Software Engineering

Nexteer Automotive,

Saginaw, MI, USA

Prepared By:

Tata Elxsi,

Trivandrum, INDIA

Change History

Table of Contents

1 Introduction 5

1.1 Purpose 5

2 FordMsg217BusHiSpd & High-Level Description 6

3 Design details of software module 7

3.1 Graphical representation of FordMsg217BusHiSpd 7

3.2 Data Flow Diagram 7

Component level DFD 7

Function level DFD 7

4 Constant Data Dictionary 8

4.1 Program (fixed) Constants 8

Embedded Constants 8

5 Software Component Implementation 9

5.1 Sub-Module Functions 9

5.1.1 Init: FordMsg217BusHiSpdInit1 9

5.1.1.1 Design Rationale 9

5.1.1.2 Module Outputs 9

5.1.2 Per: FordMsg217BusHiSpdPer1 9

5.1.2.1 Design Rationale 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

5.2 Server Runnables 9

5.2.1 ComIPduCallout_BrakeSysFeatures_3_HS2_Oper 9

5.2.1.1 Design Rationale 9

5.2.1.2 Processing of function 9

5.2.2 ComTimeoutNotification_SelDrvMdeChassis2_D_Rq_Oper 9

5.2.2.1 Design Rationale 9

5.2.2.2 Processing of function 9

5.3 Interrupt Functions 10

5.4 Module Internal (Local) Functions 10

5.4.1 Local Function #1 10

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 11

5.4.2.2 Processing 11

5.4.3 Local Function #3 11

5.4.3.1 Design Rationale 11

5.4.3.2 Processing 11

5.4.4 Local Function #4 11

5.4.4.1 Design Rationale 12

5.4.4.2 Processing 12

5.4.5 Local Function #5 12

5.4.5.1 Design Rationale 13

5.4.5.2 Processing 13

5.4.6 Local Function #6 13

5.4.6.1 Design Rationale 13

5.4.6.2 Processing 13

5.4.7 Local Function #7 14

5.4.7.1 Design Rationale 14

5.4.7.2 Processing 14

5.4.8 Local Function #8 14

5.4.8.1 Design Rationale 14

5.4.8.2 Processing 14

5.5 GLOBAL Function/Macro Definitions 15

6 Known Limitations with Design 16

7 UNIT TEST CONSIDERATION 17

Appendix A Abbreviations and Acronyms 18

Appendix B Glossary 19

Appendix C References 20

Introduction

Purpose

MDD for FordMsg217BusHiSpd

FordMsg217BusHiSpd & High-Level Description

Please refer FDD.

Design details of software module

Graphical representation of FordMsg217BusHiSpd

Data Flow Diagram

Component level DFD

Please refer FDD.

Function level DFD

Please refer FDD.

Constant Data Dictionary

Program (fixed) Constants

Embedded Constants

Local Constants

Software Component Implementation

Sub-Module Functions

5.1.1 Init: FordMsg217BusHiSpdInit1

5.1.1.1 Design Rationale

None

5.1.1.2 Module Outputs

None

5.1.2 Per: FordMsg217BusHiSpdPer1

5.1.2.1 Design Rationale

None

5.1.2.2 Store Module Inputs to Local copies

None

5.1.2.3 Processing of function

None

5.1.2.4 Store Local copy of outputs into Module Outputs

None

Server Runnables

5.2.1 ComIPduCallout_BrakeSysFeatures_3_HS2_Oper

5.2.1.1 Design Rationale

None

5.2.1.2 Processing of function

None

5.2.2 ComTimeoutNotification_SelDrvMdeChassis2_D_Rq_Oper

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.

MM065A_FordMsg217BusHiSpd/FordMsg217BusHiSpd/FordMsg217BusHiSpdPer1/DiagEna

Local Function #2

Design Rationale

None

Processing

Please refer to the below path in the FDD model.

MM065A_FordMsg217BusHiSpd/FordMsg217BusHiSpd/FordMsg217BusHiSpdPer1/CalSeln

Local Function #3

Design Rationale

None

Processing

Please refer to the below path in the FDD model.

MM065A_FordMsg217BusHiSpd/FordMsg217BusHiSpd/FordMsg217BusHiSpdPer1/FordMsg217MsgMiss/VldFalse

Local Function #4

Design Rationale

None

Processing

Please refer to the below path in the FDD model.

MM065A_FordMsg217BusHiSpd/FordMsg217BusHiSpd/FordMsg217BusHiSpdPer1/FordMsg217MsgPrsnt/SignalProcessing

Local Function #5

Design Rationale

None

Processing

Please refer to the below path in the FDD model.

MM065A_FordMsg217BusHiSpd/FordMsg217BusHiSpd/FordMsg217BusHiSpdPer1/FordMsg217MsgPrsnt/SignalProcessing/VldChk

Local Function #6

Design Rationale

None

Processing

Please refer to the below path in the FDD model.

MM065A_FordMsg217BusHiSpd/FordMsg217BusHiSpd/FordMsg217BusHiSpdPer1/FordMsg217MsgPrsnt/FordVehFrntWhlSpdInvldSts

MM065A_FordMsg217BusHiSpd/FordMsg217BusHiSpd/FordMsg217BusHiSpdPer1/FordMsg217MsgPrsnt/FordVehFrntWhlSpdInvldNtcReset

Local Function #7

Design Rationale

None

Processing

Please refer to the below path in the FDD model.

MM065A_FordMsg217BusHiSpd/FordMsg217BusHiSpd/FordMsg217BusHiSpdPer1/FordMsg217MsgPrsnt/FordVehReWhlSpdInvldSts

MM065A_FordMsg217BusHiSpd/FordMsg217BusHiSpd/FordMsg217BusHiSpdPer1/FordMsg217MsgPrsnt/FordVehReWhlSpdInvldNtcReset

Local Function #8

Design Rationale

None

Processing

Please refer to the below path in the FDD model.

MM065A_FordMsg217BusHiSpd/FordMsg217BusHiSpd/FordMsg217BusHiSpdPer1/FordMsg217MsgPrsnt/FordMsg217MissMsgPass

MM065A_FordMsg217BusHiSpd/FordMsg217BusHiSpd/FordMsg217BusHiSpdPer1/FordMsg217MsgPrsnt/Reset

GLOBAL Function/Macro Definitions

None

Known Limitations with Design

1. In the following path,

MM065A_FordMsg217BusHiSpd/FordMsg217BusHiSpd/FordMsg217BusHiSpdPer1/FordMsg217MsgPrsnt

Ford Vehicle Front Left Wheel Speed Valid (FordVehFrntLeWhlSpdVld) and Ford Vehicle Front Right Wheel Speed (FordVehFrntRiWhlSpdVld) signals are cross coupled.

2. In the path,

MM065A_FordMsg217BusHiSpd/FordMsg217BusHiSpd/FordMsg217BusHiSpdPer1/FordMsg217MsgPrsnt/FordVehReWhlSpdInvldSts/ReRiWhlSpdInvldFail

There is a mismatch between the logic inside ReRiWhlSpdInvldFail subsystem and its input port name.

3. In the following path,

MM065A_FordMsg217BusHiSpd/FordMsg217BusHiSpd/FordMsg217BusHiSpdPer1/FordMsg217MsgMiss/VldFalse/ReLeWhlSpdVld Previous

MM065A_FordMsg217BusHiSpd/FordMsg217BusHiSpd/FordMsg217BusHiSpdPer1/FordMsg217MsgMiss/VldFalse/ReRiWhlSpdVld Previous

The port name used within the ReLeWhlSpdVld Previous and ReRiWhlSpdVld Previous subsystems do not match with the merge block output names.

4. In the following path,

MM065A_FordMsg217BusHiSpd/FordMsg217BusHiSpd/FordMsg217BusHiSpdPer1/CalSeln/FixdTi

uint32 constant value(BUSHISPDFIXDTITHD_MILLISEC_U32) is assigned to uint16 signals.

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