Rename canbus_send() to canhw_send() and rename canbus_set_filter() to canhw_set_filter(). This makes it more clear where the code should reside. Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Add support for CANbus on the rp2040 using the can2040 "software canbus" implementation. Signed-off-by: Kevin O'Connor <kevin@koconnor.net>