Time triggered network technologies are now making their way into automotive electronic designs. At the same time the number of ECUs integrated within a vehicle is growing. The next generation of vehicles will have LIN, CAN and FlexRay network technologies used for the variety of control applications. In addition to these, MOST will be used for infotainment. A signal representing a real world physical quantity such as engine speed may traverse across several of these network technologies. The signals oriented design process has been presented which can support the needs of both time-triggered and non-time time triggered protocols. The approach can be used in AUTOSAR and non-AUTOSAR based designs of the future. The System Description File format has been proposed and currently has provision for LIN, CAN, TTCAN, FlexRay, MOST protocols and also supports internal I/O representation. The System Description File is scalable since it is XML based and can support more or less expression as required. For example, a diagnostic tool might need less expression but implementation within embedded code might need more expression. E.g. ports and messages are very much implementation specific items of how a signal is transported. The design methods proposed are currently being implemented in tools of Warwick Control and partners and move towards the automation of much of this process. The CAN protocol does not fit into easily into the Time Triggered design process but proposals have been made that is better to visualise as a communication matrix and therefore aid the signal/message mapping process. Visualising and designing CAN in this way means that it matters less whether a network is designed as CAN or TTCAN. TTCAN fits into the time triggered design process better and may eventually see some adoption in the future.
An approach to in-vehicle network design
Ein Verfahren zur Entwicklung von fahrzeugeigenen Netzwerken
2006
10 Seiten, 6 Bilder, 6 Quellen
Conference paper
English
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