import RPi.GPIO as GPIO import pygame import time

GPIO.setmode(GPIO.BCM) GPIO.setwarnings(False)

#set up pins inputs = [12,16,20,21] #for each pin set it as an input! for x in inputs: GPIO.setup(x,GPIO.IN,pull_up_down=GPIO.PUD_UP)

#song list songs = ['genghis_khan','shake_off','di de','wash_side','queen_janelle','yes'] song_loc = '/home/pi/mostec17/audio/' pygame.mixer.init()

current_song = 0 #used to count through songs! play_pause_state = False #True is playing, #False is not playing

#create list...initialize with whatever values: old_switch_states= [True,True,True,True]

#initialize switch state values! for x in range(len(inputs)): #print(inputs[x]) old_switch_states[x] = GPIO.input(inputs[x])

#preload a song, play it, immediately pause it! pygame.mixer.music.load(song_loc+songs[current_song]+'.mp3') pygame.mixer.music.play() pygame.mixer.music.pause()

def unpause(): global play_pause_state #global allows to change variable inside function play_pause_state = True print("Unpause") pygame.mixer.music.unpause()

def pause(): global play_pause_state play_pause_state = False print("Pause") pygame.mixer.music.pause() def next_song(): global current_song current_song = current_song + 1 print(current_song) print(len(songs)) if current_song == len(songs): print("Reached Maximum") current_song = 0

print("Next song")   
pygame.mixer.music.load(song_loc+songs[current_song]+'.mp3')
pygame.mixer.music.play()

def volume(inc_dec): print("changing volume") percent = 0.1 curVol = pygame.mixer.music.get_volume() print(curVol) if inc_dec and curVol != 1: #Increase pygame.mixer.music.set_volume(curVol+percent) elif curVol != 0: #Decrease curVol = curVol - percent pygame.mixer.music.set_volume(curVol-percent) pass

def readInputs(new_readings, old_readings): a = len(old_readings) if old_readings[a-1] == True and new_readings[a-1] == False: return "next_song" elif old_readings[a-2] == True and new_readings[a-2] == False: return "pause_unpause" elif old_readings[a-3] == True and new_readings[a-3] == False: return "volup" elif old_readings[a-4] == True and new_readings[a-4] == False: return "voldown"

try: while True: new_switch_states = [] for x in inputs: new_switch_states.append(GPIO.input(x)) output = readInputs(new_switch_states,old_switch_states) old_switch_states=new_switch_states if output != None: print(output) if output == 'pause_unpause' and not play_pause_state: unpause() elif output == 'pause_unpause' and play_pause_state: pause() elif output == 'next_song': next_song() elif output == 'volup': volume(True) elif output == 'voldown': volume(False) time.sleep(0.1) except KeyboardInterrupt: pygame.mixer.music.stop() GPIO.cleanup()