buttons.py 文件源码

def __init__(self, button_pins, bounce_time):
        # Set bounce time
        self.bounce_time = bounce_time

        # Set buttons
        self.buttons = button_pins

        # Initialize display client
        self.display = False

        # We don't need warnings from GPIO
        GPIO.setwarnings(False)

        # Set button GPIO pins as inputs and enable interrupts
        for button in button_pins:
            if (button_pins[button] != False):
                GPIO.setup(button_pins[button], GPIO.IN, pull_up_down = GPIO.PUD_UP)
                GPIO.add_event_detect(button_pins[button], GPIO.FALLING, callback=self.button_pressed, bouncetime=self.bounce_time)

        # Initalize MPD
        self.mpd = False

    # Register MPD client to send it commands