Forked from chaddotson/simple_gpio_with_javascript.js
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| /* | |
| Requires: | |
| - pi-gpio | |
| - gpio-admin | |
| This snippet is intended to be the hello world equivalent for working | |
| with the raspberry pi gpio with node.js. This simply flashes an LED | |
| connected to pin 7 based on the duration. | |
| */ | |
| var gpio = require("pi-gpio"); | |
| function flashLED(pin, duration) { | |
| return setInterval(function() { | |
| gpio.open(pin, "output", function(err) { | |
| gpio.write(pin, 1, function() { | |
| setTimeout(function() { | |
| gpio.write(pin, 0, function(err) { | |
| gpio.close(pin); | |
| }); | |
| }, duration/2); | |
| }); | |
| }); | |
| }, duration); | |
| } | |
| var intervalID = flashLED(7, 500); | |
| setTimeout(function() { | |
| clearInterval(intervalID); | |
| }, 60000); |
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| # Requires: RPi.GPIO | |
| import RPi.GPIO as GPIO | |
| from threading import Event, Thread, Timer | |
| class ImprovedThread(Thread): | |
| def __init__(self, *args, **kwargs): | |
| super(ImprovedThread, self).__init__(*args, **kwargs) | |
| self._stopEvent = Event() | |
| def stop(self): | |
| self._stopEvent.set() | |
| def is_stopped(self): | |
| return self._stopEvent.isSet() | |
| def wait(self, duration): | |
| self._stopEvent.wait(duration); | |
| class LEDFlasher(ImprovedThread): | |
| def __init__(self, pin, duration): | |
| super(LEDFlasher, self).__init__(target=self._flashLED) | |
| self.setDaemon(True) | |
| self._pin = pin | |
| self._duration = duration | |
| self._state = False | |
| GPIO.setmode(GPIO.BOARD) | |
| GPIO.setup(self._pin, GPIO.OUT) | |
| self.start() | |
| def _flashLED(self): | |
| while not self.is_stopped(): | |
| GPIO.output(self._pin, self._state) | |
| self._state = not self._state | |
| self.wait(self._duration/2) | |
| flasher = LEDFlasher(7, 0.5) | |
| Timer(60, flasher.stop).start() | |
| flasher.join() | |
| GPIO.cleanup() |
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