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 selfdrive.car.mazda import mazdacan
from selfdrive.car.mazda.values import SteerLimitParams, Buttons
from opendbc.can.packer import CANPacker
from selfdrive.car import apply_std_steer_torque_limits
class CarController():
def __init__(self, dbc_name, CP, VM):
self.apply_steer_last = 0
self.packer = CANPacker(dbc_name)
self.steer_rate_limited = False
def update(self, enabled, CS, frame, actuators):
""" Controls thread """
can_sends = []
### STEER ###
if enabled:
# calculate steer and also set limits due to driver torque
new_steer = int(round(actuators.steer * SteerLimitParams.STEER_MAX))
apply_steer = apply_std_steer_torque_limits(new_steer, self.apply_steer_last,
CS.out.steeringTorque, SteerLimitParams)
self.steer_rate_limited = new_steer != apply_steer
if CS.out.standstill and frame % 50 == 0:
# Mazda Stop and Go requires a RES button (or gas) press if the car stops more than 3 seconds
# Send Resume button at 2hz if we're engaged at standstill to support full stop and go!
# TODO: improve the resume trigger logic by looking at actual radar data
can_sends.append(mazdacan.create_button_cmd(self.packer, CS.CP.carFingerprint, Buttons.RESUME))
else:
apply_steer = 0
self.steer_rate_limited = False
if CS.out.cruiseState.enabled and frame % 10 == 0:
# Cancel Stock ACC if it's enabled while OP is disengaged
# Match stock message rate which is sent at 10hz
can_sends.append(mazdacan.create_button_cmd(self.packer, CS.CP.carFingerprint, Buttons.CANCEL))
self.apply_steer_last = apply_steer
can_sends.append(mazdacan.create_steering_control(self.packer, CS.CP.carFingerprint,
frame, apply_steer, CS.cam_lkas))
return can_sends