keyboard.py

   1 import pygame
   2 import RPi.GPIO as gpio
   3
   4 gpio.setmode(gpio.BCM)
   5 if gpio.RPI_REVISION == 1:
   6     pins = [22, 21, 17, 4, 25, 24, 23, 18]
   7 else:
   8     pins = [22, 27, 17, 4, 25, 24, 23, 18]
   9
  10 notes = ['sounds/keyboard-g.wav',
  11          'sounds/keyboard-a.wav',
  12          'sounds/keyboard-b.wav',
  13          'sounds/keyboard-c.wav',
  14          'sounds/keyboard-d.wav',
  15          'sounds/keyboard-e.wav',
  16          'sounds/keyboard-f.wav',
  17          'sounds/keyboard-g-high.wav']
  18
  19 pygame.mixer.init()
  20
  21 sounds = {}
  22 for pin, wav in zip(pins, notes):
  23     sounds[pin] = pygame.mixer.Sound(wav)
  24
  25 def handle_sound(pin):
  26     if gpio.input(pin):
  27         sounds[pin].play()
  28     else:
  29         sounds[pin].stop()
  30
  31 for pin in pins:
  32     gpio.setup(pin, gpio.IN)
  33     gpio.add_event_detect(pin, gpio.BOTH, callback=handle_sound,
  34                           bouncetime=50)
  35
  36 while True:
  37     pass