Grundlagen FlexRay - Institut für Automatisierungs- und ...

Grundlagen FlexRay BasicsV 1.1 2
Dokument Versionsverwaltung
Version Autor QS Datum Status Änderungen
0.1 Bäurle Pe 05.06.2011 in Bearb. Erstellung
1.0 Bäurle Pe 09.06.2011 vorgelegt
1.0 Bäurle Pe 21.06.2011 akzeptiert
1.1 Koch Ya 12.10.2012 akzeptiert Überarbeitung
Table of contents
TABLE OF CONTENTS ......................................................................................................... 2
ABBREVIATIONS .................................................................................................................. 3
NAME CONVENTIONS ......................................................................................................... 6
GLOSSARY .............................................................................................................................. 7
1 FLEXRAY ....................................................................................................................... 10
1.1 MOTIVATION ......................................................................................................................................... 10
1.2 REQUIREMENTS AND PROPERTIES .......................................................................................................... 10
2 TECHNICAL BASICS .................................................................................................. 12
2.1 OSI-MODEL .......................................................................................................................................... 12
2.2 STRUCTURE OF A COMMUNICATION NODE ............................................................................................. 12
2.3 TERMINATION OF NODES ....................................................................................................................... 15
2.4 PHYSICAL TOPOLOGY ............................................................................................................................ 17
2.5 SIGNAL TRANSMISSION .......................................................................................................................... 20
2.6 WAKEUP ................................................................................................................................................ 22
2.7 STARTUP ............................................................................................................................................... 23
2.8 SYNCHRONIZATION ............................................................................................................................... 25
2.9 RE-SYNCHRONIZATION (BIT-SYNCHRONIZATION) ................................................................................ 27
2.10 TIMING .................................................................................................................................................. 30
2.11 COMMUNICATION STRUCTURE .............................................................................................................. 32
2.11.1 FlexRay Cycle .................................................................................................... 32
2.11.2 Bus access .......................................................................................................... 32
2.11.3 Static segment .................................................................................................... 33
2.11.4 Dynamic segment ............................................................................................... 33
2.11.5 Symbol Window ................................................................................................. 34
2.11.6 Network Idle Time ............................................................................................. 35
2.12 FRAME FORMAT..................................................................................................................................... 35
2.12.1 Header ................................................................................................................ 35
2.12.2 Payload ............................................................................................................... 36
2.12.3 Trailer ................................................................................................................. 36
2.12.4 Null frame .......................................................................................................... 36
2.13 PROTOCOL DATA UNIT .......................................................................................................................... 37
2.14 SCHEDULING AND CYCLE MULTIPLEXING ............................................................................................. 38
LITERATURE ....................................................................................................................... 39
Bäurle 12.10.2012