Mapping SAE J1850 Messages into CAN Version 2.0 930437

A recent extension of the Controller Area Network (CAN) protocol allows an efficient mapping of the SAE J1850 data link messages defined by SAE J2178 into the CAN message format. Compatibility between J1850 and CAN at the message header level allows designers to use the same messages and overall communications strategy for both today's medium speed SAE Class B links and tomorrow's high speed Class C bus applications. This paper presents a proposed mapping of SAE J2178 messages into extended format CAN messages and explains the benefits of this approach for vehicle systems developers.


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