PwrLimr_MDD

Module Design Document

For

PwrLimr

20-APR-2018

Prepared For:

Software Engineering

Nexteer Automotive,

Saginaw, MI, USA

Prepared By:

Shawn Penning,

Nexteer Automotive,

Saginaw, MI, USA
Change History

Table of Contents

1 PwrLimr High-Level Description 5

2 Design details of software module 6

2.1 Graphical representation of PwrLimr 6

2.2 Data Flow Diagram 6

2.2.1 Component level DFD 6

2.2.2 Function level DFD 6

3 Constant Data Dictionary 7

3.1 Program (fixed) Constants 7

3.1.1 Embedded Constants 7

4 Software Component Implementation 8

4.1 Sub-Module Functions 8

4.1.1 Init: PwrLimrInit1 8

4.1.1.1 Design Rationale 8

4.1.1.2 Module Outputs 8

4.1.2 Per: PwrLimrPer1 8

4.1.2.1 Design Rationale 8

4.1.2.2 Store Module Inputs to Local copies 8

4.1.2.3 (Processing of function)……… 8

4.1.2.4 Store Local copy of outputs into Module Outputs 8

4.1.3 Per: PwrLimrPer2 8

4.1.3.1 Design Rationale 8

4.1.3.2 Store Module Inputs to Local copies 8

4.1.3.3 (Processing of function)……… 8

4.1.3.4 Store Local copy of outputs into Module Outputs 8

4.2 Server Runnables 9

4.3 Interrupt Functions 9

4.4 Module Internal (Local) Functions 9

4.4.1 AssiLimCdn 9

5 Known Limitations with Design 10

6 UNIT TEST CONSIDERATION 11

Appendix A Abbreviations and Acronyms 12

Appendix B Glossary 13

Appendix C References 14

PwrLimr High-Level Description

Refer FDD

Design details of software module

Graphical representation of PwrLimr

Data Flow Diagram

Component level DFD

Function level DFD

Constant Data Dictionary

Program (fixed) Constants

Embedded Constants

Local Constants

Software Component Implementation

Sub-Module Functions

Init: PwrLimrInit1

Design Rationale

Refer FDD

Module Outputs

Refer FDD

Per: PwrLimrPer1

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

Per: PwrLimrPer2

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

None

Interrupt Functions

None

Module Internal (Local) Functions

AssiLimCdn

Design Rationale

See “Asst_Lmt_Condition_Determination” block in the Simulink model of the design.

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