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May 23, 2017 10:42
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Simple push button controlled song player for Raspberry Pi
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| #!/usr/bin/env python | |
| import sys | |
| import RPi.GPIO as GPIO | |
| import signal | |
| import subprocess | |
| from time import sleep | |
| pinOutput = 12 | |
| pinInput = 16 | |
| soundFile = "/home/pi/player/music.mp3" | |
| discoRunning = False | |
| def log(message): | |
| sys.stdout.write(message + "\n") | |
| sys.stdout.flush() | |
| def handleButton(channel): | |
| global discoRunning | |
| if discoRunning: | |
| discoRunning = False | |
| else: | |
| discoRunning = True | |
| def executeDisco(): | |
| global discoRunning | |
| log("Executing disco") | |
| GPIO.output(pinOutput, GPIO.HIGH) | |
| p = subprocess.Popen(["mpg123", "-q", soundFile]) | |
| while p.poll() is None: | |
| sleep(0.1) | |
| if discoRunning == False: | |
| log("Terminating disco by button") | |
| p.terminate() | |
| sleep(0.1) | |
| GPIO.output(pinOutput, GPIO.LOW) | |
| log("Finishing disco") | |
| def shutdown(signum, frame): | |
| log("Quitting") | |
| GPIO.cleanup() | |
| sys.exit(0) | |
| signal.signal(signal.SIGINT, shutdown) | |
| signal.signal(signal.SIGTERM, shutdown) | |
| GPIO.setmode(GPIO.BOARD) | |
| GPIO.setup(pinOutput, GPIO.OUT, initial=GPIO.LOW) | |
| GPIO.setup(pinInput, GPIO.IN, pull_up_down=GPIO.PUD_UP) | |
| log("Ready and sleeping") | |
| sleep(3) | |
| GPIO.add_event_detect(pinInput, GPIO.RISING, callback=handleButton, bouncetime=500) | |
| log("Button prepared") | |
| while True: | |
| if discoRunning: | |
| executeDisco() | |
| discoRunning = False | |
| sleep(0.05) |
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| [Unit] | |
| Description=Push button player | |
| After=network.target sound.target | |
| [Service] | |
| ExecStart=/home/pi/player/player.py | |
| KillMode=process | |
| Restart=on-failure | |
| [Install] | |
| WantedBy=multi-user.target |
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