rotary_class_2.py 文件源码

def __init__(self,pinA,pinB,callback):
      self.pinA = pinA
      self.pinB = pinB
      #self.button = button
      self.callback = callback
      GPIO.setmode(GPIO.BCM)
      # The following lines enable the internal pull-up resistors
      # on version 2 (latest) boards
      GPIO.setwarnings(False)
      GPIO.setup(self.pinA, GPIO.IN, pull_up_down=GPIO.PUD_UP)
      GPIO.setup(self.pinB, GPIO.IN, pull_up_down=GPIO.PUD_UP)
      #GPIO.setup(self.button, GPIO.IN, pull_up_down=GPIO.PUD_UP)
      # For version 1 (old) boards comment out the above four lines
      # and un-comment the following 3 lines
      #GPIO.setup(self.pinA, GPIO.IN)
      #GPIO.setup(self.pinB, GPIO.IN)
      #GPIO.setup(self.button, GPIO.IN)
      # Add event detection to the GPIO inputs
      GPIO.add_event_detect(self.pinA, GPIO.FALLING, callback=self.switch_event)
      GPIO.add_event_detect(self.pinB, GPIO.FALLING, callback=self.switch_event)
      #GPIO.add_event_detect(self.button, GPIO.BOTH, callback=self.button_event, bouncetime=200)
      return


# Call back routine called by switch events