HwTq4Meas_MDD

Module Design Document

For

HwTq4Meas

Oct 30, 2017

Prepared For:

Software Engineering

Nexteer Automotive,

Saginaw, MI, USA

Prepared By:

TATA ELXSI,

TRIVANDRUM, INDIA

Change History

Table of Contents

1 Introduction 6

1.1 Purpose 6

2 HwTq4Meas & High-Level Description 7

3 Design details of software module 8

3.1 Graphical representation of HwTq4Meas 8

3.2 Data Flow Diagram 8

3.2.1 Component level DFD 8

3.2.2 Function level DFD 8

4 Constant Data Dictionary 9

4.1 Program (fixed) Constants 9

4.1.1 Embedded Constants 9

5 Software Component Implementation 10

5.1.1 Init: HwTq4Meas_Init1 10

5.1.1.1 Design Rationale 10

5.1.1.2 Module Outputs 10

5.1.2 Per: HwTq4Meas_Per1 10

5.1.2.1 Design Rationale 10

5.1.3 Per: HwTq4Meas_Per2 10

5.1.3.1 Design Rationale 10

5.1.4 Per: HwTq4Meas_Per3 10

5.1.4.1 Design Rationale 10

5.1.5 Per: HwTq4Meas_Per4 10

5.1.5.1 Design Rationale 10

5.2 Server Runables 10

5.2.1 HwTq4AutTrim_Oper 10

5.2.1.1 Design Rationale 10

5.2.2 HwTq4ClrSnsrSca_Oper 10

5.2.2.1 Design Rationale 10

5.2.3 HwTq4ClrTrim_Oper 11

5.2.3.1 Design Rationale 11

5.2.4 HwTq4ReadSnsrSca_Oper 11

5.2.4.1 Design Rationale 11

5.2.5 HwTq4ReadTrim_Oper 11

5.2.5.1 Design Rationale 11

5.2.6 HwTq4TrimPrfmdSts_Oper 11

5.2.6.1 Design Rationale 11

5.2.7 HwTq4WrSnsrSca_Oper 11

5.2.7.1 Design Rationale 11

5.2.8 HwTq4WrTrim_Oper 11

5.2.8.1 Design Rationale 11

5.2.9 HwTq4SnsrScaPrfmdSts_Oper 11

5.2.9.1 Design Rationale 11

5.3 Module Internal (Local) Functions 11

5.3.1 Local Function #1 11

5.3.1.1 Design Rationale 12

5.3.1.2 Processing 12

6 Known Limitations with Design 13

7 UNIT TEST CONSIDERATION 14

Appendix A Abbreviations and Acronyms 15

Appendix B Glossary 16

Appendix C References 17

Introduction

Purpose

MDD for HwTq4Meas.

HwTq4Meas & High-Level Description

Design details of software module

Please refer to the FDD.

Graphical representation of HwTq4Meas

Data Flow Diagram

Component level DFD

Function level DFD

Constant Data Dictionary

Program (fixed) Constants

Embedded Constants

Local Constants

Software Component Implementation

Init: HwTq4Meas_Init1

Design Rationale

None

Module Outputs

None

Per: HwTq4Meas_Per1

Design Rationale

Rte_Pim_HwTq4RawFastAdcIdxCntr is used in this periodic as a counter that increments from 0 to 7 and is used to write to an output buffer MotCtrlHwTq4RawFastAdcBuf accessed by Motor Control Manager. Whereas the FDD describes this counter as 1 based indexing that increments from 1 till 8. Effective they are same in terms of functionality.

Per: HwTq4Meas_Per2

Design Rationale

None

Per: HwTq4Meas_Per3

Design Rationale

None

Per: HwTq4Meas_Per4

Design Rationale

None

Server Runables

HwTq4AutTrim_Oper

Design Rationale

None

HwTq4ClrSnsrSca_Oper

Design Rationale

None

HwTq4ClrTrim_Oper

Design Rationale

None

HwTq4ReadSnsrSca_Oper

Design Rationale

None

HwTq4ReadTrim_Oper

Design Rationale

None

HwTq4TrimPrfmdSts_Oper

Design Rationale

None

HwTq4WrSnsrSca_Oper

Design Rationale

None

HwTq4WrTrim_Oper

Design Rationale

None

HwTq4SnsrScaPrfmdSts_Oper

Design Rationale

None

Module Internal (Local) Functions

Local Function #1

Design Rationale

Processing

Please refer to the below path in the FDD model.

ES220A_HwTq4Meas/HwTq4Meas/HwTq4MeasPer2/HwTqQlfr

Known Limitations with Design

None.

UNIT TEST CONSIDERATION

Rte_Pim_HwTq4PrevRollgCntr is being used as a rolling counter. Hence the overflow is intentional.

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