60 lines
1.5 KiB
Python
60 lines
1.5 KiB
Python
import RPi.GPIO as GPIO
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import time
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import thread
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import subprocess
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# pin-setup
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GPIO.setmode(GPIO.BOARD)
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led_pin = 12
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blk_pin = 16
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red_pin = 18
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# set volume
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cmd_amixer1 = 'amixer -c 0 set PCM 98%'
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cmd_amixer2 = 'amixer -c 0 set Speaker 98%'
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# the process we want to start and its argument
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cmd_player = 'mplayer'
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arg_player = 'http://192.168.1.33:8000/mpd.ogg'
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process = 0
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def playerThreadFunc():
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# we need in every thread, so it is a global
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global process
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# kill if running
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if process != 0:
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if process.poll() == None:
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process.terminate()
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subprocess.call(['killall', cmd_player], shell=True)
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time.sleep(1)
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# turn on led
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GPIO.output(led_pin, True)
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# start process and wait for termination
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process = subprocess.Popen([cmd_player, arg_player])
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process.wait()
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# turn off led
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GPIO.output(led_pin, False)
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# callback function
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def callBackFunc(channel=0):
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thread.start_new_thread(playerThreadFunc, ())
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# init
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GPIO.setup(led_pin, GPIO.OUT)
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GPIO.setup(blk_pin, GPIO.IN, pull_up_down=GPIO.PUD_UP)
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GPIO.setup(red_pin, GPIO.IN, pull_up_down=GPIO.PUD_UP)
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# add event
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GPIO.add_event_detect(blk_pin, GPIO.RISING, callback=callBackFunc, bouncetime=300)
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while True:
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subprocess.call(cmd_amixer1, shell=True)
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subprocess.call(cmd_amixer2, shell=True)
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thread.start_new_thread(playerThreadFunc, ())
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GPIO.wait_for_edge(red_pin, GPIO.FALLING)
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break
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# clean
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GPIO.cleanup()
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subprocess.call('shutdown -h now', shell=True)
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