nopenpilot/selfdrive/car/README.MD

Port structure

interace.py

Generic interface to send and receive messages from CAN (controlsd uses this to communicate with car)

carcontroller.py

Builds CAN messages to send to car

carstate.py

Reads CAN from car and builds openpilot CarState message

values.py

Fingerprints and absolute limits

radar_interface.py

Radar interface