RpiUtils.py 文件源码

def init_gpio(self, rpi_settings):
        """
        Initialize GPIO pin to a default value. Leds are off by default
        Mute button is set as an input
        :param rpi_settings: RpiSettings object
        """
        # All led are off by default
        if self.rpi_settings.pin_led_muted:
            GPIO.setup(rpi_settings.pin_led_muted, GPIO.OUT, initial=GPIO.LOW)
        if self.rpi_settings.pin_led_started:
            GPIO.setup(rpi_settings.pin_led_started, GPIO.OUT, initial=GPIO.LOW)
        if self.rpi_settings.pin_led_listening:
            GPIO.setup(rpi_settings.pin_led_listening, GPIO.OUT, initial=GPIO.LOW)
        if self.rpi_settings.pin_led_talking:
            GPIO.setup(rpi_settings.pin_led_talking, GPIO.OUT, initial=GPIO.LOW)

        # MUTE button
        if self.rpi_settings.pin_mute_button:
            GPIO.setup(rpi_settings.pin_mute_button, GPIO.IN, pull_up_down=GPIO.PUD_UP)
            GPIO.add_event_detect(rpi_settings.pin_mute_button, GPIO.FALLING,
                                  callback=self.switch_kalliope_mute_led,
                                  bouncetime=500)