added button handler

Moped/moped.py

@@ -0,0 +1,46 @@
+#!/usr/bin/python
+
+from time import sleep
+
+import RPi.GPIO as GPIO
+
+yellowLed = 15
+redLed = 17
+greenLed = 18
+
+buttonPin = 27
+
+sleepTime = 0.25
+
+def buttonHandler(channel):
+    print 'button pushed'
+
+try:
+    GPIO.setmode(GPIO.BCM)
+    GPIO.setup(yellowLed, GPIO.OUT)
+    GPIO.setup(redLed, GPIO.OUT)
+    GPIO.setup(greenLed, GPIO.OUT)
+
+    GPIO.setup(buttonPin, GPIO.IN, pull_up_down=GPIO.PUD_UP)
+    
+    GPIO.add_event_detect(buttonPin, GPIO.FALLING, callback=buttonHandler, bouncetime=1000)    
+
+    while True:
+        GPIO.output(yellowLed, 1)
+        GPIO.output(redLed, 0)
+        GPIO.output(greenLed, 0)
+        sleep(sleepTime)
+        GPIO.output(yellowLed, 0)
+        GPIO.output(redLed, 1)
+        GPIO.output(greenLed, 0)
+        sleep(sleepTime)
+        GPIO.output(yellowLed, 0)
+        GPIO.output(redLed, 0)
+        GPIO.output(greenLed, 1)
+        sleep(sleepTime)
+except KeyboardInterrupt:
+    GPIO.output(yellowLed, 0)
+    GPIO.output(redLed, 0)
+    GPIO.output(greenLed, 0)
+finally:
+    GPIO.cleanup()