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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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openpilot_comma/selfdrive/car/honda/interface.py

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#!/usr/bin/env python
import os
import numpy as np
from cereal import car
from common.numpy_fast import clip, interp
from common.realtime import sec_since_boot
from selfdrive.config import Conversions as CV
from selfdrive.controls.lib.drive_helpers import create_event, EventTypes as ET, get_events
from selfdrive.controls.lib.vehicle_model import VehicleModel
from selfdrive.car.honda.carstate import CarState, get_can_parser
from selfdrive.car.honda.values import CruiseButtons, CM, BP, AH
from selfdrive.controls.lib.planner import A_ACC_MAX
from common.fingerprints import HONDA as CAR
try:
from .carcontroller import CarController
except ImportError:
CarController = None
# msgs sent for steering controller by camera module on can 0.
# those messages are mutually exclusive on CRV and non-CRV cars
CAMERA_MSGS = [0xe4, 0x194]
def compute_gb_honda(accel, speed):
creep_brake = 0.0
creep_speed = 2.3
creep_brake_value = 0.15
if speed < creep_speed:
creep_brake = (creep_speed - speed) / creep_speed * creep_brake_value
return float(accel) / 4.8 - creep_brake
def get_compute_gb_acura():
# generate a function that takes in [desired_accel, current_speed] -> [-1.0, 1.0]
# where -1.0 is max brake and 1.0 is max gas
# see debug/dump_accel_from_fiber.py to see how those parameters were generated
w0 = np.array([[ 1.22056961, -0.39625418, 0.67952657],
[ 1.03691769, 0.78210306, -0.41343188]])
b0 = np.array([ 0.01536703, -0.14335321, -0.26932889])
w2 = np.array([[-0.59124422, 0.42899439, 0.38660881],
[ 0.79973811, 0.13178682, 0.08550351],
[-0.15651935, -0.44360259, 0.76910877]])
b2 = np.array([ 0.15624429, 0.02294923, -0.0341086 ])
w4 = np.array([[-0.31521443],
[-0.38626176],
[ 0.52667892]])
b4 = np.array([-0.02922216])
def compute_output(dat, w0, b0, w2, b2, w4, b4):
m0 = np.dot(dat, w0) + b0
m0 = leakyrelu(m0, 0.1)
m2 = np.dot(m0, w2) + b2
m2 = leakyrelu(m2, 0.1)
m4 = np.dot(m2, w4) + b4
return m4
def leakyrelu(x, alpha):
return np.maximum(x, alpha * x)
def _compute_gb_acura(accel, speed):
# linearly extrap below v1 using v1 and v2 data
v1 = 5.
v2 = 10.
dat = np.array([accel, speed])
if speed > 5.:
m4 = compute_output(dat, w0, b0, w2, b2, w4, b4)
else:
dat[1] = v1
m4v1 = compute_output(dat, w0, b0, w2, b2, w4, b4)
dat[1] = v2
m4v2 = compute_output(dat, w0, b0, w2, b2, w4, b4)
m4 = (speed - v1) * (m4v2 - m4v1) / (v2 - v1) + m4v1
return float(m4)
return _compute_gb_acura
class CarInterface(object):
def __init__(self, CP, sendcan=None):
self.CP = CP
self.frame = 0
self.last_enable_pressed = 0
self.last_enable_sent = 0
self.gas_pressed_prev = False
self.brake_pressed_prev = False
self.can_invalid_count = 0
self.cp = get_can_parser(CP)
# *** init the major players ***
self.CS = CarState(CP)
self.VM = VehicleModel(CP)
# sending if read only is False
if sendcan is not None:
self.sendcan = sendcan
self.CC = CarController(self.cp.dbc_name, CP.enableCamera)
if self.CS.CP.carFingerprint == CAR.ACURA_ILX:
self.compute_gb = get_compute_gb_acura()
else:
self.compute_gb = compute_gb_honda
@staticmethod
def calc_accel_override(a_ego, a_target, v_ego, v_target):
# limit the pcm accel cmd if:
# - v_ego exceeds v_target, or
# - a_ego exceeds a_target and v_ego is close to v_target
eA = a_ego - a_target
valuesA = [1.0, 0.1]
bpA = [0.3, 1.1]
eV = v_ego - v_target
valuesV = [1.0, 0.1]
bpV = [0.0, 0.5]
valuesRangeV = [1., 0.]
bpRangeV = [-1., 0.]
# only limit if v_ego is close to v_target
speedLimiter = interp(eV, bpV, valuesV)
accelLimiter = max(interp(eA, bpA, valuesA), interp(eV, bpRangeV, valuesRangeV))
# accelOverride is more or less the max throttle allowed to pcm: usually set to a constant
# unless aTargetMax is very high and then we scale with it; this help in quicker restart
return float(max(0.714, a_target / A_ACC_MAX)) * min(speedLimiter, accelLimiter)
@staticmethod
def get_params(candidate, fingerprint):
# kg of standard extra cargo to count for drive, gas, etc...
std_cargo = 136
ret = car.CarParams.new_message()
ret.carName = "honda"
ret.carFingerprint = candidate
ret.safetyModel = car.CarParams.SafetyModels.honda
ret.enableSteer = True
ret.enableBrake = True
ret.enableCamera = not any(x for x in CAMERA_MSGS if x in fingerprint)
ret.enableGas = 0x201 in fingerprint
print "ECU Camera Simulated: ", ret.enableCamera
print "ECU Gas Interceptor: ", ret.enableGas
ret.enableCruise = not ret.enableGas
# FIXME: hardcoding honda civic 2016 touring params so they can be used to
# scale unknown params for other cars
mass_civic = 2923./2.205 + std_cargo
wheelbase_civic = 2.70
centerToFront_civic = wheelbase_civic * 0.4
centerToRear_civic = wheelbase_civic - centerToFront_civic
rotationalInertia_civic = 2500
tireStiffnessFront_civic = 85400
tireStiffnessRear_civic = 90000
ret.steerKiBP, ret.steerKpBP = [[0.], [0.]]
if candidate == CAR.CIVIC:
stop_and_go = True
ret.mass = mass_civic
ret.wheelbase = wheelbase_civic
ret.centerToFront = centerToFront_civic
ret.steerRatio = 13.0
# Civic at comma has modified steering FW, so different tuning for the Neo in that car
is_fw_modified = os.getenv("DONGLE_ID") in ['99c94dc769b5d96e']
ret.steerKpV, ret.steerKiV = [[0.4], [0.12]] if is_fw_modified else [[0.8], [0.24]]
ret.longitudinalKpBP = [0., 5., 35.]
ret.longitudinalKpV = [3.6, 2.4, 1.5]
ret.longitudinalKiBP = [0., 35.]
ret.longitudinalKiV = [0.54, 0.36]
elif candidate == CAR.ACURA_ILX:
stop_and_go = False
ret.mass = 3095./2.205 + std_cargo
ret.wheelbase = 2.67
ret.centerToFront = ret.wheelbase * 0.37
ret.steerRatio = 15.3
# Acura at comma has modified steering FW, so different tuning for the Neo in that car
is_fw_modified = os.getenv("DONGLE_ID") in ['85a6c74d4ad9c310']
ret.steerKpV, ret.steerKiV = [[0.1], [0.03]] if is_fw_modified else [[0.8], [0.24]]
ret.longitudinalKpBP = [0., 5., 35.]
ret.longitudinalKpV = [1.2, 0.8, 0.5]
ret.longitudinalKiBP = [0., 35.]
ret.longitudinalKiV = [0.18, 0.12]
elif candidate == CAR.CRV:
stop_and_go = False
ret.mass = 3572./2.205 + std_cargo
ret.wheelbase = 2.62
ret.centerToFront = ret.wheelbase * 0.41
ret.steerRatio = 15.3
ret.steerKpV, ret.steerKiV = [[0.8], [0.24]]
ret.longitudinalKpBP = [0., 5., 35.]
ret.longitudinalKpV = [1.2, 0.8, 0.5]
ret.longitudinalKiBP = [0., 35.]
ret.longitudinalKiV = [0.18, 0.12]
elif candidate == CAR.ACURA_RDX:
stop_and_go = False
ret.mass = 3935./2.205 + std_cargo
ret.wheelbase = 2.68
ret.centerToFront = ret.wheelbase * 0.38
ret.steerRatio = 15.0
ret.steerKpV, ret.steerKiV = [[0.8], [0.24]]
ret.longitudinalKpBP = [0., 5., 35.]
ret.longitudinalKpV = [1.2, 0.8, 0.5]
ret.longitudinalKiBP = [0., 35.]
ret.longitudinalKiV = [0.18, 0.12]
elif candidate == CAR.ODYSSEY:
stop_and_go = False
ret.mass = 4354./2.205 + std_cargo
ret.wheelbase = 3.00
ret.centerToFront = ret.wheelbase * 0.41
ret.steerRatio = 14.35
ret.steerKpV, ret.steerKiV = [[0.6], [0.18]]
ret.longitudinalKpBP = [0., 5., 35.]
ret.longitudinalKpV = [1.2, 0.8, 0.5]
ret.longitudinalKiBP = [0., 35.]
ret.longitudinalKiV = [0.18, 0.12]
elif candidate == CAR.PILOT:
stop_and_go = False
ret.mass = 4303./2.205 + std_cargo
ret.wheelbase = 2.81
ret.centerToFront = ret.wheelbase * 0.41
ret.steerRatio = 16.0
ret.steerKpV, ret.steerKiV = [[0.38], [0.11]]
ret.longitudinalKpBP = [0., 5., 35.]
ret.longitudinalKpV = [1.2, 0.8, 0.5]
ret.longitudinalKiBP = [0., 35.]
ret.longitudinalKiV = [0.18, 0.12]
else:
raise ValueError("unsupported car %s" % candidate)
ret.steerKf = 0. # TODO: investigate FF steer control for Honda
# min speed to enable ACC. if car can do stop and go, then set enabling speed
# to a negative value, so it won't matter. Otherwise, add 0.5 mph margin to not
# conflict with PCM acc
ret.minEnableSpeed = -1. if (stop_and_go or ret.enableGas) else 25.5 * CV.MPH_TO_MS
centerToRear = ret.wheelbase - ret.centerToFront
# TODO: get actual value, for now starting with reasonable value for
# civic and scaling by mass and wheelbase
ret.rotationalInertia = rotationalInertia_civic * \
ret.mass * ret.wheelbase**2 / (mass_civic * wheelbase_civic**2)
# TODO: start from empirically derived lateral slip stiffness for the civic and scale by
# mass and CG position, so all cars will have approximately similar dyn behaviors
ret.tireStiffnessFront = tireStiffnessFront_civic * \
ret.mass / mass_civic * \
(centerToRear / ret.wheelbase) / (centerToRear_civic / wheelbase_civic)
ret.tireStiffnessRear = tireStiffnessRear_civic * \
ret.mass / mass_civic * \
(ret.centerToFront / ret.wheelbase) / (centerToFront_civic / wheelbase_civic)
# no rear steering, at least on the listed cars above
ret.steerRatioRear = 0.
# no max steer limit VS speed
ret.steerMaxBP = [0.] # m/s
ret.steerMaxV = [1.] # max steer allowed
ret.gasMaxBP = [0.] # m/s
ret.gasMaxV = [0.6] if ret.enableGas else [0.] # max gas allowed
ret.brakeMaxBP = [5., 20.] # m/s
ret.brakeMaxV = [1., 0.8] # max brake allowed
ret.longPidDeadzoneBP = [0.]
ret.longPidDeadzoneV = [0.]
ret.stoppingControl = True
ret.steerLimitAlert = True
ret.startAccel = 0.5
ret.steerRateCost = 0.5
return ret
# returns a car.CarState
def update(self, c):
# ******************* do can recv *******************
canMonoTimes = []
self.cp.update(int(sec_since_boot() * 1e9), False)
self.CS.update(self.cp)
# create message
ret = car.CarState.new_message()
# speeds
ret.vEgo = self.CS.v_ego
ret.aEgo = self.CS.a_ego
ret.vEgoRaw = self.CS.v_ego_raw
ret.yawRate = self.VM.yaw_rate(self.CS.angle_steers * CV.DEG_TO_RAD, self.CS.v_ego)
ret.standstill = self.CS.standstill
ret.wheelSpeeds.fl = self.CS.v_wheel_fl
ret.wheelSpeeds.fr = self.CS.v_wheel_fr
ret.wheelSpeeds.rl = self.CS.v_wheel_rl
ret.wheelSpeeds.rr = self.CS.v_wheel_rr
# gas pedal
ret.gas = self.CS.car_gas / 256.0
if not self.CP.enableGas:
ret.gasPressed = self.CS.pedal_gas > 0
else:
ret.gasPressed = self.CS.user_gas_pressed
# brake pedal
ret.brake = self.CS.user_brake
ret.brakePressed = self.CS.brake_pressed != 0
# FIXME: read sendcan for brakelights
brakelights_threshold = 0.02 if self.CS.CP.carFingerprint == CAR.CIVIC else 0.1
ret.brakeLights = bool(self.CS.brake_switch or
c.actuators.brake > brakelights_threshold)
# steering wheel
ret.steeringAngle = self.CS.angle_steers
ret.steeringRate = self.CS.angle_steers_rate
# gear shifter lever
ret.gearShifter = self.CS.gear_shifter
ret.steeringTorque = self.CS.steer_torque_driver
ret.steeringPressed = self.CS.steer_override
# cruise state
ret.cruiseState.enabled = self.CS.pcm_acc_status != 0
ret.cruiseState.speed = self.CS.v_cruise_pcm * CV.KPH_TO_MS
ret.cruiseState.available = bool(self.CS.main_on)
ret.cruiseState.speedOffset = self.CS.cruise_speed_offset
ret.cruiseState.standstill = False
# TODO: button presses
buttonEvents = []
ret.leftBlinker = bool(self.CS.left_blinker_on)
ret.rightBlinker = bool(self.CS.right_blinker_on)
ret.doorOpen = not self.CS.door_all_closed
ret.seatbeltUnlatched = not self.CS.seatbelt
if self.CS.left_blinker_on != self.CS.prev_left_blinker_on:
be = car.CarState.ButtonEvent.new_message()
be.type = 'leftBlinker'
be.pressed = self.CS.left_blinker_on != 0
buttonEvents.append(be)
if self.CS.right_blinker_on != self.CS.prev_right_blinker_on:
be = car.CarState.ButtonEvent.new_message()
be.type = 'rightBlinker'
be.pressed = self.CS.right_blinker_on != 0
buttonEvents.append(be)
if self.CS.cruise_buttons != self.CS.prev_cruise_buttons:
be = car.CarState.ButtonEvent.new_message()
be.type = 'unknown'
if self.CS.cruise_buttons != 0:
be.pressed = True
but = self.CS.cruise_buttons
else:
be.pressed = False
but = self.CS.prev_cruise_buttons
if but == CruiseButtons.RES_ACCEL:
be.type = 'accelCruise'
elif but == CruiseButtons.DECEL_SET:
be.type = 'decelCruise'
elif but == CruiseButtons.CANCEL:
be.type = 'cancel'
elif but == CruiseButtons.MAIN:
be.type = 'altButton3'
buttonEvents.append(be)
if self.CS.cruise_setting != self.CS.prev_cruise_setting:
be = car.CarState.ButtonEvent.new_message()
be.type = 'unknown'
if self.CS.cruise_setting != 0:
be.pressed = True
but = self.CS.cruise_setting
else:
be.pressed = False
but = self.CS.prev_cruise_setting
if but == 1:
be.type = 'altButton1'
# TODO: more buttons?
buttonEvents.append(be)
ret.buttonEvents = buttonEvents
# events
# TODO: I don't like the way capnp does enums
# These strings aren't checked at compile time
events = []
if not self.CS.can_valid:
self.can_invalid_count += 1
if self.can_invalid_count >= 5:
events.append(create_event('commIssue', [ET.NO_ENTRY, ET.IMMEDIATE_DISABLE]))
else:
self.can_invalid_count = 0
if self.CS.steer_error:
events.append(create_event('steerUnavailable', [ET.NO_ENTRY, ET.IMMEDIATE_DISABLE, ET.PERMANENT]))
elif self.CS.steer_not_allowed:
events.append(create_event('steerTempUnavailable', [ET.NO_ENTRY, ET.WARNING]))
if self.CS.brake_error:
events.append(create_event('brakeUnavailable', [ET.NO_ENTRY, ET.IMMEDIATE_DISABLE, ET.PERMANENT]))
if not ret.gearShifter == 'drive':
events.append(create_event('wrongGear', [ET.NO_ENTRY, ET.SOFT_DISABLE]))
if ret.doorOpen:
events.append(create_event('doorOpen', [ET.NO_ENTRY, ET.SOFT_DISABLE]))
if ret.seatbeltUnlatched:
events.append(create_event('seatbeltNotLatched', [ET.NO_ENTRY, ET.SOFT_DISABLE]))
if self.CS.esp_disabled:
events.append(create_event('espDisabled', [ET.NO_ENTRY, ET.SOFT_DISABLE]))
if not self.CS.main_on:
events.append(create_event('wrongCarMode', [ET.NO_ENTRY, ET.USER_DISABLE]))
if ret.gearShifter == 'reverse':
events.append(create_event('reverseGear', [ET.NO_ENTRY, ET.IMMEDIATE_DISABLE]))
if self.CS.brake_hold:
events.append(create_event('brakeHold', [ET.NO_ENTRY, ET.USER_DISABLE]))
if self.CS.park_brake:
events.append(create_event('parkBrake', [ET.NO_ENTRY, ET.USER_DISABLE]))
if self.CP.enableCruise and ret.vEgo < self.CP.minEnableSpeed:
events.append(create_event('speedTooLow', [ET.NO_ENTRY]))
# disable on pedals rising edge or when brake is pressed and speed isn't zero
if (ret.gasPressed and not self.gas_pressed_prev) or \
(ret.brakePressed and (not self.brake_pressed_prev or ret.vEgo > 0.001)):
events.append(create_event('pedalPressed', [ET.NO_ENTRY, ET.USER_DISABLE]))
if ret.gasPressed:
events.append(create_event('pedalPressed', [ET.PRE_ENABLE]))
# 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 self.CP.enableCruise and not ret.cruiseState.enabled and c.actuators.brake <= 0.:
# non loud alert if cruise disbales below 25mph as expected (+ a little margin)
if ret.vEgo < self.CP.minEnableSpeed + 2.:
events.append(create_event('speedTooLow', [ET.IMMEDIATE_DISABLE]))
else:
events.append(create_event("cruiseDisabled", [ET.IMMEDIATE_DISABLE]))
if self.CS.CP.carFingerprint != CAR.CIVIC and ret.vEgo < 0.001:
events.append(create_event('manualRestart', [ET.WARNING]))
cur_time = sec_since_boot()
enable_pressed = False
# handle button presses
for b in ret.buttonEvents:
# do enable on both accel and decel buttons
if b.type in ["accelCruise", "decelCruise"] and not b.pressed:
print "enabled pressed at", cur_time
self.last_enable_pressed = cur_time
enable_pressed = True
# do disable on button down
if b.type == "cancel" and b.pressed:
events.append(create_event('buttonCancel', [ET.USER_DISABLE]))
if self.CP.enableCruise:
# KEEP THIS EVENT LAST! send enable event if button is pressed and there are
# NO_ENTRY events, so controlsd will display alerts. Also not send enable events
# too close in time, so a no_entry will not be followed by another one.
# TODO: button press should be the only thing that triggers enble
if ((cur_time - self.last_enable_pressed) < 0.2 and
(cur_time - self.last_enable_sent) > 0.2 and
ret.cruiseState.enabled) or \
(enable_pressed and get_events(events, [ET.NO_ENTRY])):
events.append(create_event('buttonEnable', [ET.ENABLE]))
self.last_enable_sent = cur_time
elif enable_pressed:
events.append(create_event('buttonEnable', [ET.ENABLE]))
ret.events = events
ret.canMonoTimes = canMonoTimes
# update previous brake/gas pressed
self.gas_pressed_prev = ret.gasPressed
self.brake_pressed_prev = ret.brakePressed
# cast to reader so it can't be modified
return ret.as_reader()
# pass in a car.CarControl
# to be called @ 100hz
def apply(self, c):
if c.hudControl.speedVisible:
hud_v_cruise = c.hudControl.setSpeed * CV.MS_TO_KPH
else:
hud_v_cruise = 255
hud_alert = {
"none": AH.NONE,
"fcw": AH.FCW,
"steerRequired": AH.STEER,
"brakePressed": AH.BRAKE_PRESSED,
"wrongGear": AH.GEAR_NOT_D,
"seatbeltUnbuckled": AH.SEATBELT,
"speedTooHigh": AH.SPEED_TOO_HIGH}[str(c.hudControl.visualAlert)]
snd_beep, snd_chime = {
"none": (BP.MUTE, CM.MUTE),
"beepSingle": (BP.SINGLE, CM.MUTE),
"beepTriple": (BP.TRIPLE, CM.MUTE),
"beepRepeated": (BP.REPEATED, CM.MUTE),
"chimeSingle": (BP.MUTE, CM.SINGLE),
"chimeDouble": (BP.MUTE, CM.DOUBLE),
"chimeRepeated": (BP.MUTE, CM.REPEATED),
"chimeContinuous": (BP.MUTE, CM.CONTINUOUS)}[str(c.hudControl.audibleAlert)]
pcm_accel = int(clip(c.cruiseControl.accelOverride,0,1)*0xc6)
self.CC.update(self.sendcan, c.enabled, self.CS, self.frame, \
c.actuators, \
c.cruiseControl.speedOverride, \
c.cruiseControl.override, \
c.cruiseControl.cancel, \
pcm_accel, \
hud_v_cruise, c.hudControl.lanesVisible, \
hud_show_car = c.hudControl.leadVisible, \
hud_alert = hud_alert, \
snd_beep = snd_beep, \
snd_chime = snd_chime)
self.frame += 1