sunnypilot/selfdrive/car/README.md

Car port structure

interface.py

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

fingerprints.py

Fingerprints for matching to a specific car

carcontroller.py

Builds CAN messages to send to car

carstate.py

Reads CAN from car and builds openpilot CarState message

values.py

Limits for actuation, general constants for cars, and supported car documentation

radar_interface.py

Interface for parsing radar points from the car