linux.py 文件源码

def init_gpio(self) -> None:
        """Initializes the GPIO interface."""
        # Set SoC as reference.
        GPIO.setmode(GPIO.BCM)
        # Set pin as input and activate pull-down resistor.
        GPIO.setup(self._pin,
                   GPIO.IN,
                   pull_up_down=GPIO.PUD_DOWN)
        # Add interrupt event.
        GPIO.add_event_detect(self._pin,
                              GPIO.RISING,
                              callback=self._interrupt,
                              bouncetime=self._bounce_time)