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Hello, I have to send a CAN message with CRC, I know that the protection is according to Autosar_SWS_E2ELibrary Profile 1C. Where can I find a rule on how the CRC is calculated?

Looks like it's an xor of the bytes. See page 19

https://www.autosar.org/fileadmin/user_ ... otocol.pdf

Dilbert wrote: ↑Sat Dec 05, 2020 8:17 pm Looks like it's an xor of the bytes. See page 19

https://www.autosar.org/fileadmin/user_ ... otocol.pdf

I think you are right. I've found a very good site. There you can calculate CRCs online to check your own routine. There is also a link for explanation with C ++ examples.

http://www.sunshine2k.de/coding/javascr ... rc_js.html

Yes i've done it for J1939 before and from memory, it was an XOR of the bytes so not really a true CRC.