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, log
import cereal.messaging as messaging
from opendbc.car import DT_CTRL, structs
from opendbc.car.interfaces import MAX_CTRL_SPEED
from openpilot.selfdrive.selfdrived.events import Events
ButtonType = structs.CarState.ButtonEvent.Type
GearShifter = structs.CarState.GearShifter
EventName = log.OnroadEvent.EventName
NetworkLocation = structs.CarParams.NetworkLocation
# TODO: the goal is to abstract this file into the CarState struct and make events generic
class MockCarState:
def __init__(self):
self.sm = messaging.SubMaster(['gpsLocation', 'gpsLocationExternal'])
def update(self, CS: car.CarState):
self.sm.update(0)
gps_sock = 'gpsLocationExternal' if self.sm.recv_frame['gpsLocationExternal'] > 1 else 'gpsLocation'
CS.vEgo = self.sm[gps_sock].speed
CS.vEgoRaw = self.sm[gps_sock].speed
return CS
class CarSpecificEvents:
def __init__(self, CP: structs.CarParams):
self.CP = CP
self.steering_unpressed = 0
self.low_speed_alert = False
self.no_steer_warning = False
self.silent_steer_warning = True
def update(self, CS: car.CarState, CS_prev: car.CarState, CC: car.CarControl):
if self.CP.brand in ('body', 'mock'):
events = Events()
elif self.CP.brand == 'ford':
events = self.create_common_events(CS, CS_prev, extra_gears=[GearShifter.low, GearShifter.manumatic])
elif self.CP.brand == 'nissan':
events = self.create_common_events(CS, CS_prev, extra_gears=[GearShifter.brake])
elif self.CP.brand == 'chrysler':
events = self.create_common_events(CS, CS_prev, extra_gears=[GearShifter.low])
# Low speed steer alert hysteresis logic
if self.CP.minSteerSpeed > 0. and CS.vEgo < (self.CP.minSteerSpeed + 0.5):
self.low_speed_alert = True
elif CS.vEgo > (self.CP.minSteerSpeed + 1.):
self.low_speed_alert = False
if self.low_speed_alert:
events.add(EventName.belowSteerSpeed)
elif self.CP.brand == 'honda':
events = self.create_common_events(CS, CS_prev, pcm_enable=False)
if self.CP.pcmCruise and CS.vEgo < self.CP.minEnableSpeed:
events.add(EventName.belowEngageSpeed)
if self.CP.pcmCruise:
# we engage when pcm is active (rising edge)
if CS.cruiseState.enabled and not CS_prev.cruiseState.enabled:
events.add(EventName.pcmEnable)
elif not CS.cruiseState.enabled and (CC.actuators.accel >= 0. or not self.CP.openpilotLongitudinalControl):
# it can happen that car cruise disables while comma system is enabled: need to
# keep braking if needed or if the speed is very low
if CS.vEgo < self.CP.minEnableSpeed + 2.:
# non loud alert if cruise disables below 25mph as expected (+ a little margin)
events.add(EventName.speedTooLow)
else:
events.add(EventName.cruiseDisabled)
if self.CP.minEnableSpeed > 0 and CS.vEgo < 0.001:
events.add(EventName.manualRestart)
elif self.CP.brand == 'toyota':
events = self.create_common_events(CS, CS_prev)
if self.CP.openpilotLongitudinalControl:
if CS.cruiseState.standstill and not CS.brakePressed:
events.add(EventName.resumeRequired)
if CS.vEgo < self.CP.minEnableSpeed:
events.add(EventName.belowEngageSpeed)
if CC.actuators.accel > 0.3:
# some margin on the actuator to not false trigger cancellation while stopping
events.add(EventName.speedTooLow)
if CS.vEgo < 0.001:
# while in standstill, send a user alert
events.add(EventName.manualRestart)
elif self.CP.brand == 'gm':
events = self.create_common_events(CS, CS_prev, extra_gears=[GearShifter.sport, GearShifter.low,
GearShifter.eco, GearShifter.manumatic],
pcm_enable=self.CP.pcmCruise)
# Enabling at a standstill with brake is allowed
# TODO: verify 17 Volt can enable for the first time at a stop and allow for all GMs
if CS.vEgo < self.CP.minEnableSpeed and not (CS.standstill and CS.brake >= 20 and
self.CP.networkLocation == NetworkLocation.fwdCamera):
events.add(EventName.belowEngageSpeed)
if CS.cruiseState.standstill:
events.add(EventName.resumeRequired)
elif self.CP.brand == 'volkswagen':
events = self.create_common_events(CS, CS_prev, extra_gears=[GearShifter.eco, GearShifter.sport, GearShifter.manumatic],
pcm_enable=self.CP.pcmCruise)
if self.CP.openpilotLongitudinalControl:
if CS.vEgo < self.CP.minEnableSpeed + 0.5:
events.add(EventName.belowEngageSpeed)
if CC.enabled and CS.vEgo < self.CP.minEnableSpeed:
events.add(EventName.speedTooLow)
# TODO: this needs to be implemented generically in carState struct
# if CC.eps_timer_soft_disable_alert: # type: ignore[attr-defined]
# events.add(EventName.steerTimeLimit)
elif self.CP.brand == 'hyundai':
events = self.create_common_events(CS, CS_prev, extra_gears=(GearShifter.sport, GearShifter.manumatic),
pcm_enable=self.CP.pcmCruise, allow_button_cancel=False)
else:
events = self.create_common_events(CS, CS_prev)
return events
def create_common_events(self, CS: structs.CarState, CS_prev: car.CarState, extra_gears=None, pcm_enable=True,
allow_button_cancel=True):
events = Events()
if CS.doorOpen:
events.add(EventName.doorOpen)
if CS.seatbeltUnlatched:
events.add(EventName.seatbeltNotLatched)
if CS.gearShifter != GearShifter.drive and (extra_gears is None or
CS.gearShifter not in extra_gears):
events.add(EventName.wrongGear)
if CS.gearShifter == GearShifter.reverse:
events.add(EventName.reverseGear)
if not CS.cruiseState.available:
events.add(EventName.wrongCarMode)
if CS.espDisabled:
events.add(EventName.espDisabled)
if CS.espActive:
events.add(EventName.espActive)
if CS.stockFcw:
events.add(EventName.stockFcw)
if CS.stockAeb:
events.add(EventName.stockAeb)
if CS.vEgo > MAX_CTRL_SPEED:
events.add(EventName.speedTooHigh)
if CS.cruiseState.nonAdaptive:
events.add(EventName.wrongCruiseMode)
if CS.brakeHoldActive and self.CP.openpilotLongitudinalControl:
events.add(EventName.brakeHold)
if CS.parkingBrake:
events.add(EventName.parkBrake)
if CS.accFaulted:
events.add(EventName.accFaulted)
if CS.steeringPressed:
events.add(EventName.steerOverride)
if CS.steeringDisengage and not CS_prev.steeringDisengage:
events.add(EventName.steerDisengage)
if CS.brakePressed and CS.standstill:
events.add(EventName.preEnableStandstill)
if CS.gasPressed:
events.add(EventName.gasPressedOverride)
if CS.vehicleSensorsInvalid:
events.add(EventName.vehicleSensorsInvalid)
if CS.invalidLkasSetting:
events.add(EventName.invalidLkasSetting)
if CS.lowSpeedAlert:
events.add(EventName.belowSteerSpeed)
if CS.buttonEnable:
events.add(EventName.buttonEnable)
# Handle cancel button presses
for b in CS.buttonEvents:
# Disable on rising and falling edge of cancel for both stock and OP long
# TODO: only check the cancel button with openpilot longitudinal on all brands to match panda safety
if b.type == ButtonType.cancel and (allow_button_cancel or not self.CP.pcmCruise):
events.add(EventName.buttonCancel)
# Handle permanent and temporary steering faults
self.steering_unpressed = 0 if CS.steeringPressed else self.steering_unpressed + 1
if CS.steerFaultTemporary:
if CS.steeringPressed and (not CS_prev.steerFaultTemporary or self.no_steer_warning):
self.no_steer_warning = True
else:
self.no_steer_warning = False
# if the user overrode recently, show a less harsh alert
if self.silent_steer_warning or CS.standstill or self.steering_unpressed < int(1.5 / DT_CTRL):
self.silent_steer_warning = True
events.add(EventName.steerTempUnavailableSilent)
else:
events.add(EventName.steerTempUnavailable)
else:
self.no_steer_warning = False
self.silent_steer_warning = False
if CS.steerFaultPermanent:
events.add(EventName.steerUnavailable)
# we engage when pcm is active (rising edge)
# enabling can optionally be blocked by the car interface
if pcm_enable:
if CS.cruiseState.enabled and not CS_prev.cruiseState.enabled and not CS.blockPcmEnable:
events.add(EventName.pcmEnable)
elif not CS.cruiseState.enabled:
events.add(EventName.pcmDisable)
return events