Add buttonEnable carState field (#1698)

* first draft, works!

* common func with override

* this is common

* Revert "this is common"

This reverts commit 93ec5f9.

* forgot vw

* no

* Update opendbc/car/gm/carstate.py

opendbc/car/car.capnp

@@ -214,6 +214,7 @@ struct CarState {
 
   # button presses
   buttonEvents @11 :List(ButtonEvent);
+  buttonEnable @57 :Bool;  # user is requesting enable, usually one frame. set if pcmCruise=False
   leftBlinker @20 :Bool;
   rightBlinker @21 :Bool;
   genericToggle @23 :Bool;

opendbc/car/gm/carstate.py

@@ -33,6 +33,15 @@ def __init__(self, CP):
 
     self.distance_button = 0
 
+  def update_button_enable(self, buttonEvents: list[structs.CarState.ButtonEvent]):
+    if not self.CP.pcmCruise:
+      for b in buttonEvents:
+        # The ECM allows enabling on falling edge of set, but only rising edge of resume
+        if (b.type == ButtonType.accelCruise and b.pressed) or \
+          (b.type == ButtonType.decelCruise and not b.pressed):
+          return True
+    return False
+
   def update(self, can_parsers) -> structs.CarState:
     pt_cp = can_parsers[Bus.pt]
     cam_cp = can_parsers[Bus.cam]

opendbc/car/interfaces.py

@@ -19,6 +19,7 @@
 from opendbc.can.parser import CANParser
 
 GearShifter = structs.CarState.GearShifter
+ButtonType = structs.CarState.ButtonEvent.Type
 
 V_CRUISE_MAX = 145
 MAX_CTRL_SPEED = (V_CRUISE_MAX + 4) * CV.KPH_TO_MS
@@ -243,6 +244,8 @@ def update(self, can_packets: list[tuple[int, list[CanData]]]) -> structs.CarSta
     if ret.cruiseState.speedCluster == 0:
       ret.cruiseState.speedCluster = ret.cruiseState.speed
 
+    ret.buttonEnable = self.CS.update_button_enable(ret.buttonEvents)
+
     # save for next iteration
     self.CS.out = ret
 
@@ -345,6 +348,14 @@ def update_blinker_from_stalk(self, blinker_time: int, left_blinker_stalk: bool,
 
     return bool(left_blinker_stalk or self.left_blinker_cnt > 0), bool(right_blinker_stalk or self.right_blinker_cnt > 0)
 
+  def update_button_enable(self, buttonEvents: list[structs.CarState.ButtonEvent]):
+    if not self.CP.pcmCruise:
+      for b in buttonEvents:
+        # Enable OP long on falling edge of enable buttons
+        if b.type in (ButtonType.accelCruise, ButtonType.decelCruise) and not b.pressed:
+          return True
+    return False
+
   @staticmethod
   def parse_gear_shifter(gear: str | None) -> structs.CarState.GearShifter:
     if gear is None:

opendbc/car/volkswagen/carstate.py

@@ -6,6 +6,8 @@
 from opendbc.car.volkswagen.values import DBC, CANBUS, NetworkLocation, TransmissionType, GearShifter, \
                                                       CarControllerParams, VolkswagenFlags
 
+ButtonType = structs.CarState.ButtonEvent.Type
+
 
 class CarState(CarStateBase):
   def __init__(self, CP):
@@ -18,6 +20,14 @@ def __init__(self, CP):
     self.upscale_lead_car_signal = False
     self.eps_stock_values = False
 
+  def update_button_enable(self, buttonEvents: list[structs.CarState.ButtonEvent]):
+    if not self.CP.pcmCruise:
+      for b in buttonEvents:
+        # Enable OP long on falling edge of enable buttons
+        if b.type in (ButtonType.setCruise, ButtonType.resumeCruise) and not b.pressed:
+          return True
+    return False
+
   def create_button_events(self, pt_cp, buttons):
     button_events = []