openpilot is an open source driver assistance system. openpilot performs the functions of Automated Lane Centering and Adaptive Cruise Control for over 200 supported car makes and models.
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from cereal import car
from opendbc.can.parser import CANParser
from common.numpy_fast import mean
from selfdrive.config import Conversions as CV
from selfdrive.car.interfaces import CarStateBase
from selfdrive.car.ford.values import DBC
WHEEL_RADIUS = 0.33
class CarState(CarStateBase):
def update(self, cp):
ret = car.CarState.new_message()
ret.wheelSpeeds = self.get_wheel_speeds(
cp.vl["WheelSpeed_CG1"]["WhlFl_W_Meas"],
cp.vl["WheelSpeed_CG1"]["WhlFr_W_Meas"],
cp.vl["WheelSpeed_CG1"]["WhlRl_W_Meas"],
cp.vl["WheelSpeed_CG1"]["WhlRr_W_Meas"],
unit=WHEEL_RADIUS,
)
ret.vEgoRaw = mean([ret.wheelSpeeds.rr, ret.wheelSpeeds.rl, ret.wheelSpeeds.fr, ret.wheelSpeeds.fl])
ret.vEgo, ret.aEgo = self.update_speed_kf(ret.vEgoRaw)
ret.standstill = not ret.vEgoRaw > 0.001
ret.steeringAngleDeg = cp.vl["Steering_Wheel_Data_CG1"]["SteWhlRelInit_An_Sns"]
ret.steeringPressed = not cp.vl["Lane_Keep_Assist_Status"]["LaHandsOff_B_Actl"]
ret.steerError = cp.vl["Lane_Keep_Assist_Status"]["LaActDeny_B_Actl"] == 1
ret.cruiseState.speed = cp.vl["Cruise_Status"]["Set_Speed"] * CV.MPH_TO_MS
ret.cruiseState.enabled = not (cp.vl["Cruise_Status"]["Cruise_State"] in (0, 3))
ret.cruiseState.available = cp.vl["Cruise_Status"]["Cruise_State"] != 0
ret.gas = cp.vl["EngineData_14"]["ApedPosScal_Pc_Actl"] / 100.
ret.gasPressed = ret.gas > 1e-6
ret.brakePressed = bool(cp.vl["Cruise_Status"]["Brake_Drv_Appl"])
ret.genericToggle = bool(cp.vl["Steering_Buttons"]["Dist_Incr"])
# TODO: we also need raw driver torque, needed for Assisted Lane Change
self.lkas_state = cp.vl["Lane_Keep_Assist_Status"]["LaActAvail_D_Actl"]
return ret
@staticmethod
def get_can_parser(CP):
signals = [
# sig_name, sig_address
("WhlRr_W_Meas", "WheelSpeed_CG1"),
("WhlRl_W_Meas", "WheelSpeed_CG1"),
("WhlFr_W_Meas", "WheelSpeed_CG1"),
("WhlFl_W_Meas", "WheelSpeed_CG1"),
("SteWhlRelInit_An_Sns", "Steering_Wheel_Data_CG1"),
("Cruise_State", "Cruise_Status"),
("Set_Speed", "Cruise_Status"),
("LaActAvail_D_Actl", "Lane_Keep_Assist_Status"),
("LaHandsOff_B_Actl", "Lane_Keep_Assist_Status"),
("LaActDeny_B_Actl", "Lane_Keep_Assist_Status"),
("ApedPosScal_Pc_Actl", "EngineData_14"),
("Dist_Incr", "Steering_Buttons"),
("Brake_Drv_Appl", "Cruise_Status"),
]
checks = []
return CANParser(DBC[CP.carFingerprint]["pt"], signals, checks, 0, enforce_checks=False)