I am working on a CAN portation for the M5213EVB board. I am using properly running code for the 5485EVB as my baseline. I have adjusted the timing, output ports, interrupts etc for the 5213. However, the CAN signals that are output from the M5213EVB look a little strange. I am concerned that the board needs to be configured for correct transceiver operation. Has anyone had to utilize RCAN1, RCAN2 or the RS pad for standard CAN operation at 125kb?
My current output has the CAN_H and CAN_L at 2.5v but CAN_L drops to 1v and CAN_H only hits 2.75v with an occasional step to 3.5 and then 4v. I can operate two nodes on the network with the M5213EVB plugged in as long as it is not actively participating in the communications.
Any ideas, suggestions or small test code would be greatly appreciated.