Resolved! STM32G431 USB dfu , CAN bus , PB8 and nSWBOOT0
The problem is that the transceiver will set the RX pin high at boot , this will put the G431 in boot mode and never start . The question is how to set and reset the nSWBOOT0 bit in the program . I mean , if I am right ::2) at setup (yes , Arduino) ,...