OSEK/VDX
OSEK Communication
Specification 3.0.3
OSEK/VDX COM 3.0.3 by OSEK - 2 -
Table of Contents
1 INTRODUCTION ................................................................................................................................. 5
1.1 REQUIREMENTS ...................................................................................................................... 5
1.2 COMMUNICATION CONCEPT .................................................................................................... 6
1.3 STRUCTURE OF THIS DOCUMENT.............................................................................................. 7
2 INTERACTION LAYER ...................................................................................................................... 8
2.1 OVERVIEW .............................................................................................................................8
2.1.1 Introduction...........................................................................................................................8
2.1.2 Communication concept.........................................................................................................9
2.1.3 Configuration ...................................................................................................................... 11
2.2 MESSAGE RECEPTION............................................................................................................ 12
2.2.1 Message reception overview................................................................................................. 12
2.2.2 Reception filtering................................................................................................................ 12
2.2.3 Copying message data into message objects data area.......................................................... 14
2.2.4 Copying data to application messages.................................................................................. 14
2.2.5 Unqueued and queued messages........................................................................................... 14
2.3 MESSAGE TRANSMISSION ...................................................................................................... 16
2.3.1 Message transmission overview............................................................................................ 16
2.3.2 Transfer of internal messages............................................................................................... 17
2.3.3 Transfer properties for external communication ................................................................... 17
2.3.4 Transmission modes............................................................................................................. 17
2.3.5 Activation / Deactivation of periodic transmission mechanism.............................................. 23
2.3.6 Message filtering algorithm.................................................................................................. 23
2.4 BYTE ORDER CONVERSION AND MESSAGE INTERPRETATION ................................................... 24
2.4.1 Bit and byte numbering in I-PDUs and messages.................................................................. 24
2.4.2 Little-endian byte order........................................................................................................ 24
2.4.3 Big-endian byte order .......................................................................................................... 25
2.5 DEADLINE MONITORING........................................................................................................ 26
2.5.1 Reception Deadline Monitoring............................................................................................ 26
2.5.2 Transmission Deadline Monitoring ...................................................................................... 27
2.6 NOTIFICATION ...................................................................................................................... 31
2.6.1 Notification classes .............................................................................................................. 31
2.6.2 Notification mechanisms ...................................................................................................... 32
2.6.3 Interface for callback routines.............................................................................................. 32
2.7 COMMUNICATION SYSTEM MANAGEMENT.............................................................................. 33
2.7.1 Initialisation / Shutdown ...................................................................................................... 33
2.7.2 Error handling..................................................................................................................... 35
2.8 FUNCTIONAL MODEL OF THE INTERACTION LAYER................................................................. 37
2.9 INTERFACES ......................................................................................................................... 40
2.9.1 Interface to OSEK Indirect NM ............................................................................................ 41
2.9.2 Application Program Interface (API).................................................................................... 42
2.9.3 Routines provided by the application.................................................................................... 56
3 MINIMUM REQUIREMENTS OF LOWER COMMUNICATION LAYERS................................. 58
4 CONFORMANCE CLASSES ............................................................................................................. 59
APPENDIX A USE OF OSEK COM WITH OPERATING SYSTEMS OTHER THAN OSEK OS.......61
APPENDIX B APPLICATION NOTES.................................................................................................... 62
APPENDIX C CALLOUTS....................................................................................................................... 70
APPENDIX D HISTORY .......................................................................................................................... 72
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