Guaranteeing Message Latencies on Control Area Network (can)1
نویسندگان
چکیده
A generally perceived problem with CAN is that it is unable to guarantee the timing performance of lower priority messages. Recent work has developed analysis to bound message latencies under arbitrary error rate assumptions. Messages are permitted to be periodic or sporadic, with few restrictions on deadlines. The analysis can give optimal identifier orderings, and be used to ask “what if” questions. In this paper we derive the analysis and apply it to an SAE ‘benchmark’, assuming the Intel 82527 stand-alone CAN controller is used.
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Guaranteed Message Latencies for Distributed Safety-critical Hard Real-time Control Networks1
Analysis is presented that enables the worst case latencies for Controller Area Network (CAN) messages to be predicted. The analysis is illustrated in terms of the Intel 82527 controller and applied to a SAE benchmark. This benchmark contains some 53 message types; all of which are analysed for various transmission rates. Techniques are presented that enables the temporal behaviour of a CAN sys...
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