Use EV gas lookup tables

Co-Authored-By: Tim Wilson <7284371+twilsonco@users.noreply.github.com>
Co-Authored-By: Eric Brown <13560103+nworb-cire@users.noreply.github.com>

common/params.cc

@@ -268,6 +268,7 @@ std::unordered_map<std::string, uint32_t> keys = {
     {"DriveStats", PERSISTENT},
     {"DynamicPathWidth", PERSISTENT},
     {"EngageVolume", PERSISTENT},
+    {"EVTable", PERSISTENT},
     {"ExperimentalModeActivation", PERSISTENT},
     {"ExperimentalModeViaDistance", PERSISTENT},
     {"ExperimentalModeViaLKAS", PERSISTENT},

selfdrive/car/gm/carcontroller.py

@@ -6,7 +6,7 @@ from openpilot.common.realtime import DT_CTRL
 from opendbc.can.packer import CANPacker
 from openpilot.selfdrive.car import apply_driver_steer_torque_limits, create_gas_interceptor_command
 from openpilot.selfdrive.car.gm import gmcan
-from openpilot.selfdrive.car.gm.values import DBC, CanBus, CarControllerParams, CruiseButtons, GMFlags, CC_ONLY_CAR, SDGM_CAR
+from openpilot.selfdrive.car.gm.values import DBC, CanBus, CarControllerParams, CruiseButtons, GMFlags, CC_ONLY_CAR, EV_CAR, SDGM_CAR
 from openpilot.selfdrive.controls.lib.drive_helpers import apply_deadzone
 from openpilot.selfdrive.controls.lib.vehicle_model import ACCELERATION_DUE_TO_GRAVITY
 
@@ -138,6 +138,14 @@ class CarController:
         else:
           # Normal operation
           brake_accel = actuators.accel + self.accel_g * interp(CS.out.vEgo, BRAKE_PITCH_FACTOR_BP, BRAKE_PITCH_FACTOR_V)
+          if self.CP.carFingerprint in EV_CAR and frogpilot_variables.use_ev_tables:
+            self.params.update_ev_gas_brake_threshold(CS.out.vEgo)
+            if frogpilot_variables.sport_plus:
+              self.apply_gas = int(round(interp(accel if frogpilot_variables.long_pitch else actuators.accel, self.params.EV_GAS_LOOKUP_BP_PLUS, self.params.GAS_LOOKUP_V_PLUS)))
+            else:
+              self.apply_gas = int(round(interp(accel if frogpilot_variables.long_pitch else actuators.accel, self.params.EV_GAS_LOOKUP_BP, self.params.GAS_LOOKUP_V)))
+            self.apply_brake = int(round(interp(brake_accel if frogpilot_variables.long_pitch else actuators.accel, self.params.EV_BRAKE_LOOKUP_BP, self.params.BRAKE_LOOKUP_V)))
+          else:
             if frogpilot_variables.sport_plus:
               self.apply_gas = int(round(interp(accel if frogpilot_variables.long_pitch else actuators.accel, self.params.GAS_LOOKUP_BP_PLUS, self.params.GAS_LOOKUP_V_PLUS)))
             else:

selfdrive/car/gm/interface.py

@@ -102,6 +102,8 @@ class CarInterface(CarInterfaceBase):
       ret.enableGasInterceptor = True
       ret.safetyConfigs[0].safetyParam |= Panda.FLAG_GM_GAS_INTERCEPTOR
 
+    useEVTables = params.get_bool("EVTable")
+
     if candidate in EV_CAR:
       ret.transmissionType = TransmissionType.direct
     else:
@@ -154,7 +156,7 @@ class CarInterface(CarInterfaceBase):
       ret.pcmCruise = False  # stock non-adaptive cruise control is kept off
       # supports stop and go, but initial engage must (conservatively) be above 18mph
       ret.minEnableSpeed = 18 * CV.MPH_TO_MS
-      ret.minSteerSpeed = 7 * CV.MPH_TO_MS
+      ret.minSteerSpeed = (6.7 if useEVTables else 7) * CV.MPH_TO_MS
 
       # Tuning
       ret.longitudinalTuning.kpV = [2.4, 1.5]
@@ -189,6 +191,18 @@ class CarInterface(CarInterfaceBase):
       ret.lateralTuning.pid.kf = 1.  # get_steer_feedforward_volt()
       ret.steerActuatorDelay = 0.2
 
+      # softer long tune for ev table
+      if useEVTables:
+        ret.longitudinalTuning.kpBP = [5., 15., 35.]
+        ret.longitudinalTuning.kpV = [0.65, .9, 0.8]
+        ret.longitudinalTuning.kiBP = [5., 15.]
+        ret.longitudinalTuning.kiV = [0.04, 0.1]
+        ret.steerActuatorDelay = 0.18
+        ret.stoppingDecelRate = 0.02  # brake_travel/s while trying to stop
+        ret.stopAccel = -0.5
+        ret.startAccel = 0.8
+        ret.vEgoStopping = 0.1
+
     elif candidate == CAR.MALIBU:
       ret.mass = 1496.
       ret.wheelbase = 2.83

selfdrive/car/gm/values.py

@@ -4,6 +4,7 @@ from enum import Enum, IntFlag, StrEnum
 from typing import Dict, List, Union
 
 from cereal import car
+from openpilot.common.numpy_fast import interp
 from openpilot.common.params import Params
 from openpilot.selfdrive.car import dbc_dict
 from openpilot.selfdrive.car.docs_definitions import CarFootnote, CarHarness, CarInfo, CarParts, Column
@@ -81,6 +82,18 @@ class CarControllerParams:
     self.BRAKE_LOOKUP_BP = [self.ACCEL_MIN, max_regen_acceleration]
     self.BRAKE_LOOKUP_V = [self.MAX_BRAKE, 0.]
 
+  # determined by letting Volt regen to a stop in L gear from 89mph,
+  # and by letting off gas and allowing car to creep, for determining
+  # the positive threshold values at very low speed
+  EV_GAS_BRAKE_THRESHOLD_BP = [1.29, 1.52, 1.55, 1.6, 1.7, 1.8, 2.0, 2.2, 2.5, 5.52, 9.6, 20.5, 23.5, 35.0] # [m/s]
+  EV_GAS_BRAKE_THRESHOLD_V = [0.0, -0.14, -0.16, -0.18, -0.215, -0.255, -0.32, -0.41, -0.5, -0.72, -0.895, -1.125, -1.145, -1.16] # [m/s^s]
+
+  def update_ev_gas_brake_threshold(self, v_ego):
+    gas_brake_threshold = interp(v_ego, self.EV_GAS_BRAKE_THRESHOLD_BP, self.EV_GAS_BRAKE_THRESHOLD_V)
+    self.EV_GAS_LOOKUP_BP = [gas_brake_threshold, max(0., gas_brake_threshold), self.ACCEL_MAX]
+    self.EV_GAS_LOOKUP_BP_PLUS = [gas_brake_threshold, max(0., gas_brake_threshold), self.ACCEL_MAX_PLUS]
+    self.EV_BRAKE_LOOKUP_BP = [self.ACCEL_MIN, gas_brake_threshold]
+
 
 class CAR(StrEnum):
   HOLDEN_ASTRA = "HOLDEN ASTRA RS-V BK 2017"

selfdrive/controls/controlsd.py

@@ -1254,6 +1254,7 @@ class Controls:
     self.frogpilot_variables.set_speed_offset = self.params.get_int("SetSpeedOffset") * (1 if self.is_metric else CV.MPH_TO_KPH) if quality_of_life else 0
 
     self.random_events = self.params.get_bool("RandomEvents")
+    self.frogpilot_variables.use_ev_tables = self.params.get_bool("EVTable")
 
     self.speed_limit_controller = self.params.get_bool("SpeedLimitController")
     self.frogpilot_variables.force_mph_dashboard = self.speed_limit_controller and self.params.get_bool("ForceMPHDashboard")

selfdrive/frogpilot/ui/vehicle_settings.cc

@@ -110,6 +110,7 @@ FrogPilotVehiclesPanel::FrogPilotVehiclesPanel(SettingsWindow *parent) : FrogPil
   });
 
   std::vector<std::tuple<QString, QString, QString, QString>> vehicleToggles {
+    {"EVTable", "EV Lookup Tables", "Smoothen out the gas and brake controls for EV vehicles.", ""},
     {"GasRegenCmd", "GM Truck Gas Tune", "Increase acceleration and smoothen brake to stop. For use on Silverado/Sierra only.", ""},
     {"LongPitch", "Long Pitch Compensation", "Reduce speed and acceleration error for greater passenger comfort and improved vehicle efficiency.", ""},
     {"LowerVolt", "Lower Volt Enable Speed", "Lower the Volt's minimum enable speed to enable openpilot at any speed.", ""},

selfdrive/frogpilot/ui/vehicle_settings.h

@@ -28,7 +28,7 @@ private:
 
   std::map<std::string, ParamControl*> toggles;
 
-  std::set<QString> gmKeys = {"GasRegenCmd", "LongPitch", "LowerVolt"};
+  std::set<QString> gmKeys = {"EVTable", "GasRegenCmd", "LongPitch", "LowerVolt"};
   std::set<QString> subaruKeys = {"CrosstrekTorque"};
   std::set<QString> toyotaKeys = {"LockDoors", "LongitudinalTune", "SNGHack"};