import RPi.GPIO as GPIO
import time
from threading import Thread

# Buttons on PINs 9, 10 and 11
PIN_PREV = 10
PIN_PLAY = 9
PIN_NEXT = 11

GPIO.setmode(GPIO.BCM)
GPIO.setup(PIN_PREV, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(PIN_PLAY, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(PIN_NEXT, GPIO.IN, pull_up_down=GPIO.PUD_UP)



def prev_callback(channel):
    print('Button 1 (PREV)')
     
def play_callback(channel):
    print('Button 2 (PLAY/PAUSE)')

def next_callback(channel):
    print('Button 3 (NEXT)')


GPIO.add_event_detect(PIN_PREV, GPIO.RISING, callback=prev_callback, bouncetime=200)
GPIO.add_event_detect(PIN_PLAY, GPIO.RISING, callback=play_callback, bouncetime=200)
GPIO.add_event_detect(PIN_NEXT, GPIO.RISING, callback=next_callback, bouncetime=200)

try:

    while True:
        time.sleep(0.01)

        
# Exit when Ctrl-C is pressed
except KeyboardInterrupt:
    print('Shutdown')
finally:
    GPIO.cleanup()