KC3LEDs.py

#!/usr/bin/env python2.7
# script by Sparks N Smoke based on Alex Eames at http://RasPi.tv

import RPi.GPIO as GPIO
from time import sleep
GPIO.setmode(GPIO.BCM)

GPIO.setup(20, GPIO.IN, pull_up_down = GPIO.PUD_UP)      # Button 0
GPIO.setup(21, GPIO.IN, pull_up_down = GPIO.PUD_UP)      # Button 1
GPIO.setup(22, GPIO.IN, pull_up_down = GPIO.PUD_UP)      # Button 2
GPIO.setup(23, GPIO.IN, pull_up_down = GPIO.PUD_UP)      # Button 3

GPIO.setup(24, GPIO.OUT)                                 # LED Red
GPIO.setup(25, GPIO.OUT)                                 # LED Green
GPIO.setup(26, GPIO.OUT)                                 # LED Blue

def my_callback1(GPIO24):
    GPIO.output(24, 1)                                   # Red ON
    sleep(0.5)
    GPIO.output(24, 0)                                   # Red OFF
    print "BUTTON 1 PRESSED - main thread interrupted by another thread"

def my_callback2(GPIO25):
    GPIO.output(25, 1)                                   # Green ON
    sleep(0.5)
    GPIO.output(25, 0)                                   # Green OFF
    print "BUTTON 2 PRESSED - main thread interrupted by another thread"

def my_callback3(GPIO26):
    GPIO.output(26, 1)                                   # Blue ON
    sleep(0.5)
    GPIO.output(26, 0)                                   # Blue OFF
    print "BUTTON 3 PRESSED - main thread interrupted by another thread"

GPIO.add_event_detect(21, GPIO.FALLING, callback = my_callback1, bouncetime = 300)
GPIO.add_event_detect(22, GPIO.FALLING, callback = my_callback2, bouncetime = 300)
GPIO.add_event_detect(23, GPIO.FALLING, callback = my_callback3, bouncetime = 300)

try:
    print "Main thread waiting for falling edge on port 20 - ie BUTTON 0"
    GPIO.wait_for_edge (20, GPIO.FALLING)
    print "Falling edge on port 20 detected.  BUTTON 0 PRESSED"
    
except KeyboardInterrupt:
    GPIO.cleanup()                                       # Reset ports on CTRL-C

finally:
    GPIO.cleanup()                                       # Reset on normal exit