__init__.py 文件源码

def _configure_gpio(self):
        if not self._hasGPIO:
            self._logger.error("RPi.GPIO is required.")
            return

        self._logger.info("Running RPi.GPIO version %s" % GPIO.VERSION)
        if GPIO.VERSION < "0.6":
            self._logger.error("RPi.GPIO version 0.6.0 or greater required.")

        GPIO.setwarnings(False)

        for pin in self._configuredGPIOPins:
            self._logger.debug("Cleaning up pin %s" % pin)
            try:
                GPIO.cleanup(self._gpio_get_pin(pin))
            except (RuntimeError, ValueError) as e:
                self._logger.error(e)
        self._configuredGPIOPins = []

        if GPIO.getmode() is None:
            if self.GPIOMode == 'BOARD':
                GPIO.setmode(GPIO.BOARD)
            elif self.GPIOMode == 'BCM':
                GPIO.setmode(GPIO.BCM)
            else:
                return

        if self.sensingMethod == 'GPIO':
            self._logger.info("Using GPIO sensing to determine PSU on/off state.")
            self._logger.info("Configuring GPIO for pin %s" % self.senseGPIOPin)

            if self.senseGPIOPinPUD == 'PULL_UP':
                pudsenseGPIOPin = GPIO.PUD_UP
            elif self.senseGPIOPinPUD == 'PULL_DOWN':
                pudsenseGPIOPin = GPIO.PUD_DOWN
            else:
                pudsenseGPIOPin = GPIO.PUD_OFF

            try:
                GPIO.setup(self._gpio_get_pin(self.senseGPIOPin), GPIO.IN, pull_up_down=pudsenseGPIOPin)
                self._configuredGPIOPins.append(self.senseGPIOPin)
            except (RuntimeError, ValueError) as e:
                self._logger.error(e)

        if self.switchingMethod == 'GPIO':
            self._logger.info("Using GPIO for On/Off")
            self._logger.info("Configuring GPIO for pin %s" % self.onoffGPIOPin)
            try:
                if not self.invertonoffGPIOPin:
                    initial_pin_output=GPIO.LOW
                else:
                    initial_pin_output=GPIO.HIGH
                GPIO.setup(self._gpio_get_pin(self.onoffGPIOPin), GPIO.OUT, initial=initial_pin_output)
                self._configuredGPIOPins.append(self.onoffGPIOPin)
            except (RuntimeError, ValueError) as e:
                self._logger.error(e)