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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import copy
import crcmod
from selfdrive.car.nissan.values import CAR
nissan_checksum = crcmod.mkCrcFun(0x11d, initCrc=0x00, rev=False, xorOut=0xff)
def create_steering_control(packer, car_fingerprint, apply_steer, frame, steer_on, lkas_max_torque):
if car_fingerprint == CAR.XTRAIL:
idx = (frame % 16)
values = {
"DESIRED_ANGLE": apply_steer,
"SET_0x80_2": 0x80,
"SET_0x80": 0x80,
"MAX_TORQUE": lkas_max_torque if steer_on else 0,
"COUNTER": idx,
"LKA_ACTIVE": steer_on,
}
dat = packer.make_can_msg("LKAS", 0, values)[2]
values["CRC"] = nissan_checksum(dat[:7])
return packer.make_can_msg("LKAS", 0, values)
def create_acc_cancel_cmd(packer, cruise_throttle_msg, frame):
values = copy.copy(cruise_throttle_msg)
values["CANCEL_BUTTON"] = 1
values["NO_BUTTON_PRESSED"] = 0
values["PROPILOT_BUTTON"] = 0
values["SET_BUTTON"] = 0
values["RES_BUTTON"] = 0
values["FOLLOW_DISTANCE_BUTTON"] = 0
values["COUNTER"] = (frame % 4)
return packer.make_can_msg("CruiseThrottle", 2, values)