Mazda: Parse distance button from steering wheel (#31765)

* Mazda: Parse distance button from steering wheel

* Update selfdrive/car/mazda/interface.py

---------

Co-authored-by: Shane Smiskol <shane@smiskol.com>
old-commit-hash: ab5c0f90b5

selfdrive/car/mazda/carstate.py

@@ -18,9 +18,16 @@ class CarState(CarStateBase):
     self.lkas_allowed_speed = False
     self.lkas_disabled = False
 
+    self.prev_distance_button = 0
+    self.distance_button = 0
+
   def update(self, cp, cp_cam):
 
     ret = car.CarState.new_message()
+
+    self.prev_distance_button = self.distance_button
+    self.distance_button = cp.vl["CRZ_BTNS"]["DISTANCE_LESS"]
+
     ret.wheelSpeeds = self.get_wheel_speeds(
       cp.vl["WHEEL_SPEEDS"]["FL"],
       cp.vl["WHEEL_SPEEDS"]["FR"],

selfdrive/car/mazda/interface.py

@@ -2,7 +2,7 @@
 from cereal import car
 from openpilot.common.conversions import Conversions as CV
 from openpilot.selfdrive.car.mazda.values import CAR, LKAS_LIMITS
-from openpilot.selfdrive.car import get_safety_config
+from openpilot.selfdrive.car import create_button_events, get_safety_config
 from openpilot.selfdrive.car.interfaces import CarInterfaceBase
 
 ButtonType = car.CarState.ButtonEvent.Type
@@ -34,6 +34,9 @@ class CarInterface(CarInterfaceBase):
   def _update(self, c):
     ret = self.CS.update(self.cp, self.cp_cam)
 
+     # TODO: add button types for inc and dec
+    ret.buttonEvents = create_button_events(self.CS.distance_button, self.CS.prev_distance_button, {1: ButtonType.gapAdjustCruise})
+
     # events
     events = self.create_common_events(ret)