I am in a project and I have to comply with ISO26262 so I need to verify my CAN frame. I am going to check my frame using the CRC calculation. My question is: Should I do this calculation in my program or does the CAN protocol already do it automatically?

CodePudding user response：

CAN contains a 15 bit CRC on the data-link layer. It is handled by the CAN controller and you don't need to do a thing in software, other than checking for errors reported by the controller.

Application layer CRC could be use in some special cases like when you are transferring large amounts of data such as bootloaders. But it isn't necessary for ordinary communication.