I purchased the flexray communication protocol IP, and implemented it on FPGA, and communicated with a single-chip microcomputer through a parallel port. At present, the protocol stack is initialized with reference to the MPC5554 driver code. It always stays in the startup state. The status feedback is 0x2755, and it has been unable to communicate with other nodes. The other nodes are MC9S12XF512. It can be confirmed that the two MC9S12XF512 boards can communicate normally.
