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BACstac/32 v6.5

Porting Guide for Embedded

Platforms

Document Version: 1.0

Cimetrics, Inc.

141 Tremont Street, Floor 11

BOSTON, MASSACHUSETTS 02111

USA

TELEPHONE: +1 (617) 350-7550

FAX: +1 (617) 350-7552

E-MAIL: products@cimetrics.com (sales), support@cimetrics.com (tech. support)

WEB: http://www.cimetrics.com

BACstac/32 v6.5Porting Guide for Embedded Platforms

by Cimetrics, Inc.

Document Version: 1.0 Edition

BACstac and BACstac/32 are trademarks of Cimetrics Inc. BACnet is a registered trademark of the American Society of Heating, Refrigeration

and Air-Conditioning Engineers, Inc. (ASHRAE). LonTalk is a trademark of Echelon Corp. All other trademarks are owned by their respective

companies.

Table of Contents

1. Introduction...............................................................................................................................................................1

2. Source Code...............................................................................................................................................................2

Overview ...............................................................................................................................................................2

arch ..............................................................................................................................................................2

apil ...............................................................................................................................................................2

examples ......................................................................................................................................................2

include..........................................................................................................................................................3

test................................................................................................................................................................3

tsml ..............................................................................................................................................................3

dl ..................................................................................................................................................................3

nl ..................................................................................................................................................................3

osa ................................................................................................................................................................3

oslib..............................................................................................................................................................3

utils ..............................................................................................................................................................4

unit_test........................................................................................................................................................4

Build variables for makeﬁles.................................................................................................................................4

Steps to Build BACstac/32 on your Platform........................................................................................................8

3. How to Write the OSA............................................................................................................................................10

Terminology ........................................................................................................................................................10

OSA Initialization and Deinitialization...............................................................................................................11

OSAInit() ...................................................................................................................................................12

OSAClose()................................................................................................................................................12

Threads ................................................................................................................................................................13

General description....................................................................................................................................13

OSACreateThread() ...................................................................................................................................13

OSATerminateThread()..............................................................................................................................14

OSAWaitForThread().................................................................................................................................14

Semaphores .........................................................................................................................................................15

General description....................................................................................................................................15

OSAInitSemaphore() .................................................................................................................................15

OSAWaitForSemaphore() ..........................................................................................................................15

OSAReleaseSemaphore() ..........................................................................................................................16

OSADestroySemaphore() ..........................................................................................................................16

Recursive mutexes...............................................................................................................................................16

OSAInitRecursiveMutex().........................................................................................................................16

OSALockRecursiveMutex() ......................................................................................................................17

OSAUnlockRecursiveMutex()...................................................................................................................17

OSADestroyRecursiveMutex()..................................................................................................................17

Fast mutexes ........................................................................................................................................................18

OSAInitFastMutex() ..................................................................................................................................18

OSALockFastMutex() ...............................................................................................................................18

OSAUnlockFastMutex() ............................................................................................................................19

OSADestroyFastMutex() ...........................................................................................................................19

Atomic variables..................................................................................................................................................19

General description....................................................................................................................................19

OSAAtomicGet().......................................................................................................................................20

OSAAtomicSet()........................................................................................................................................20

iii

OSAAtomicInc()........................................................................................................................................20

OSAAtomicIncTest().................................................................................................................................20

OSAAtomicDec() ......................................................................................................................................20

OSAAtomicDecTest()................................................................................................................................21

OSAAtomicAdd()......................................................................................................................................21

OSAAtomicSub() ......................................................................................................................................21

Dynamic memory................................................................................................................................................21

General description....................................................................................................................................22

OSAAlloc()................................................................................................................................................22

OSAFree()..................................................................................................................................................22

Time.....................................................................................................................................................................22

General description....................................................................................................................................23

OSAGetTickCount() ..................................................................................................................................23

OSASleep()................................................................................................................................................23

System logging utilities.......................................................................................................................................23

General description....................................................................................................................................24

OSALogMessage() ....................................................................................................................................24

Byte ordering and ﬂoating point format utilities.................................................................................................25

General description....................................................................................................................................25

Cardinal byte order ....................................................................................................................................25

IEEE-754 compliance................................................................................................................................26

OSAFPClassify() .......................................................................................................................................26

OSAGenerateSpecFPValue() .....................................................................................................................27

Debugging support utilities .................................................................................................................................27

General description....................................................................................................................................27

OSAPanic()................................................................................................................................................27

4. How to Write the Conﬁguration Module..............................................................................................................29

Using Conﬁguration Structures...........................................................................................................................29

OSA Conﬁguration..............................................................................................................................................29

Tuning Parameters...............................................................................................................................................30

5. How to Add a Data Link Layer .............................................................................................................................31

Abbreviations ......................................................................................................................................................31

What is a sub-DL?...............................................................................................................................................32

How Does the Sub-DL Operate?.........................................................................................................................34

System resources .......................................................................................................................................35

Interface with hardware .............................................................................................................................35

Sub-DL ⇔ DL-common interface.............................................................................................................36

Data Message ...................................................................................................................................36

Data Message Interface....................................................................................................................36

List of sub-DLs ................................................................................................................................42

Sub-DL operations ...........................................................................................................................42

Operation Init..........................................................................................................................43

Operation Close ......................................................................................................................43

Operation Accept....................................................................................................................44

Operation Bind .......................................................................................................................44

Operation Unbind ...................................................................................................................46

Operation SendTo...................................................................................................................46

Operations Connect and Disconnect ......................................................................................47

Operation Ioctl........................................................................................................................47

Support functions .............................................................................................................................48

Null sub-DL example.......................................................................................................................49

Porting Ethernet Sub-DL.....................................................................................................................................52

Porting B/IP (Addendum A) Sub-DL..................................................................................................................60

Porting PTP Sub-DL ...........................................................................................................................................64

Porting ARCNET sub-DL...................................................................................................................................68

Porting MS/TP Sub-DL.......................................................................................................................................81

6. Building Unit Tests & Examples............................................................................................................................85

Building the Test Programs .................................................................................................................................85

OSA Tests............................................................................................................................................................85

Data Link Layer Tests .........................................................................................................................................86

Network Layer Test.............................................................................................................................................86

Example Server Application - FEEDBACK .......................................................................................................86

Example Client Application - DUMPALL..........................................................................................................87