I have the problem that the CAN message RAM which is allocated for the acceptance filters is not zeroed out on startup.The part of the CAN message RAM allocated for acceptance filter seems to just be random data which means that usually no CAN frames...

I came across code in NuttX that tries to set the FDCAN standard and extended ID filter configuration register to a list size of 128 each.According to the reference manual (page 2567, 56.5.22) the FDCAN_XIDFC LSE takes 8 bits with the biggest number ...