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37 lines
1.6 KiB
37 lines
1.6 KiB
import math
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from cereal import log
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from openpilot.selfdrive.controls.lib.latcontrol import LatControl
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# TODO This is speed dependent
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STEER_ANGLE_SATURATION_THRESHOLD = 2.5 # Degrees
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class LatControlAngle(LatControl):
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def __init__(self, CP, CI, dt):
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super().__init__(CP, CI, dt)
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self.sat_check_min_speed = 5.
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self.use_steer_limited_by_safety = CP.brand == "tesla"
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def update(self, active, CS, VM, params, steer_limited_by_safety, desired_curvature, curvature_limited, lat_delay):
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angle_log = log.ControlsState.LateralAngleState.new_message()
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if not active:
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angle_log.active = False
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angle_steers_des = float(CS.steeringAngleDeg)
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else:
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angle_log.active = True
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angle_steers_des = math.degrees(VM.get_steer_from_curvature(-desired_curvature, CS.vEgo, params.roll))
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angle_steers_des += params.angleOffsetDeg
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if self.use_steer_limited_by_safety:
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# these cars' carcontrollers calculate max lateral accel and jerk, so we can rely on carOutput for saturation
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angle_control_saturated = steer_limited_by_safety
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else:
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# for cars which use a method of limiting torque such as a torque signal (Nissan and Toyota)
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# or relying on EPS (Ford Q3), carOutput does not capture maxing out torque # TODO: this can be improved
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angle_control_saturated = abs(angle_steers_des - CS.steeringAngleDeg) > STEER_ANGLE_SATURATION_THRESHOLD
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angle_log.saturated = bool(self._check_saturation(angle_control_saturated, CS, False, curvature_limited))
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angle_log.steeringAngleDeg = float(CS.steeringAngleDeg)
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angle_log.steeringAngleDesiredDeg = angle_steers_des
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return 0, float(angle_steers_des), angle_log
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