47 lines
1.0 KiB
Python
47 lines
1.0 KiB
Python
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#!/usr/bin/python
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from time import sleep
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import RPi.GPIO as GPIO
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yellowLed = 15
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redLed = 17
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greenLed = 18
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buttonPin = 27
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sleepTime = 0.25
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def buttonHandler(channel):
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print 'button pushed'
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try:
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GPIO.setmode(GPIO.BCM)
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GPIO.setup(yellowLed, GPIO.OUT)
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GPIO.setup(redLed, GPIO.OUT)
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GPIO.setup(greenLed, GPIO.OUT)
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GPIO.setup(buttonPin, GPIO.IN, pull_up_down=GPIO.PUD_UP)
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GPIO.add_event_detect(buttonPin, GPIO.FALLING, callback=buttonHandler, bouncetime=1000)
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while True:
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GPIO.output(yellowLed, 1)
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GPIO.output(redLed, 0)
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GPIO.output(greenLed, 0)
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sleep(sleepTime)
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GPIO.output(yellowLed, 0)
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GPIO.output(redLed, 1)
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GPIO.output(greenLed, 0)
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sleep(sleepTime)
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GPIO.output(yellowLed, 0)
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GPIO.output(redLed, 0)
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GPIO.output(greenLed, 1)
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sleep(sleepTime)
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except KeyboardInterrupt:
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GPIO.output(yellowLed, 0)
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GPIO.output(redLed, 0)
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GPIO.output(greenLed, 0)
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finally:
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GPIO.cleanup()
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