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89 lines
3.4 KiB
89 lines
3.4 KiB
5 years ago
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from opendbc.can.parser import CANParser
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from common.numpy_fast import mean
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from selfdrive.config import Conversions as CV
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from selfdrive.car.ford.values import DBC
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from common.kalman.simple_kalman import KF1D
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WHEEL_RADIUS = 0.33
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def get_can_parser(CP):
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signals = [
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# sig_name, sig_address, default
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("WhlRr_W_Meas", "WheelSpeed_CG1", 0.),
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("WhlRl_W_Meas", "WheelSpeed_CG1", 0.),
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("WhlFr_W_Meas", "WheelSpeed_CG1", 0.),
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("WhlFl_W_Meas", "WheelSpeed_CG1", 0.),
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("SteWhlRelInit_An_Sns", "Steering_Wheel_Data_CG1", 0.),
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("Cruise_State", "Cruise_Status", 0.),
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("Set_Speed", "Cruise_Status", 0.),
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("LaActAvail_D_Actl", "Lane_Keep_Assist_Status", 0),
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("LaHandsOff_B_Actl", "Lane_Keep_Assist_Status", 0),
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("LaActDeny_B_Actl", "Lane_Keep_Assist_Status", 0),
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("ApedPosScal_Pc_Actl", "EngineData_14", 0.),
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("Dist_Incr", "Steering_Buttons", 0.),
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("Brake_Drv_Appl", "Cruise_Status", 0.),
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("Brake_Lights", "BCM_to_HS_Body", 0.),
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]
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checks = [
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]
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return CANParser(DBC[CP.carFingerprint]['pt'], signals, checks, 0)
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class CarState():
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def __init__(self, CP):
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self.CP = CP
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self.left_blinker_on = 0
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self.right_blinker_on = 0
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# initialize can parser
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self.car_fingerprint = CP.carFingerprint
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# vEgo kalman filter
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dt = 0.01
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# Q = np.matrix([[10.0, 0.0], [0.0, 100.0]])
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# R = 1e3
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self.v_ego_kf = KF1D(x0=[[0.0], [0.0]],
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A=[[1.0, dt], [0.0, 1.0]],
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C=[1.0, 0.0],
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K=[[0.12287673], [0.29666309]])
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self.v_ego = 0.0
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def update(self, cp):
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# update prevs, update must run once per loop
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self.prev_left_blinker_on = self.left_blinker_on
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self.prev_right_blinker_on = self.right_blinker_on
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# calc best v_ego estimate, by averaging two opposite corners
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self.v_wheel_fl = cp.vl["WheelSpeed_CG1"]['WhlRr_W_Meas'] * WHEEL_RADIUS
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self.v_wheel_fr = cp.vl["WheelSpeed_CG1"]['WhlRl_W_Meas'] * WHEEL_RADIUS
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self.v_wheel_rl = cp.vl["WheelSpeed_CG1"]['WhlFr_W_Meas'] * WHEEL_RADIUS
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self.v_wheel_rr = cp.vl["WheelSpeed_CG1"]['WhlFl_W_Meas'] * WHEEL_RADIUS
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v_wheel = mean([self.v_wheel_fl, self.v_wheel_fr, self.v_wheel_rl, self.v_wheel_rr])
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# Kalman filter
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if abs(v_wheel - self.v_ego) > 2.0: # Prevent large accelerations when car starts at non zero speed
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self.v_ego_kf.x = [[v_wheel], [0.0]]
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self.v_ego_raw = v_wheel
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v_ego_x = self.v_ego_kf.update(v_wheel)
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self.v_ego = float(v_ego_x[0])
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self.a_ego = float(v_ego_x[1])
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self.standstill = not v_wheel > 0.001
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self.angle_steers = cp.vl["Steering_Wheel_Data_CG1"]['SteWhlRelInit_An_Sns']
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self.v_cruise_pcm = cp.vl["Cruise_Status"]['Set_Speed'] * CV.MPH_TO_MS
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self.pcm_acc_status = cp.vl["Cruise_Status"]['Cruise_State']
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self.main_on = cp.vl["Cruise_Status"]['Cruise_State'] != 0
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self.lkas_state = cp.vl["Lane_Keep_Assist_Status"]['LaActAvail_D_Actl']
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# TODO: we also need raw driver torque, needed for Assisted Lane Change
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self.steer_override = not cp.vl["Lane_Keep_Assist_Status"]['LaHandsOff_B_Actl']
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self.steer_error = cp.vl["Lane_Keep_Assist_Status"]['LaActDeny_B_Actl']
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self.user_gas = cp.vl["EngineData_14"]['ApedPosScal_Pc_Actl']
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self.brake_pressed = bool(cp.vl["Cruise_Status"]["Brake_Drv_Appl"])
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self.brake_lights = bool(cp.vl["BCM_to_HS_Body"]["Brake_Lights"])
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self.generic_toggle = bool(cp.vl["Steering_Buttons"]["Dist_Incr"])
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