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Michael Clemens 9 years ago
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  1. 130
      tobabp.py

130
tobabp.py

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#!/usr/bin/env python
# Copyright (C) 2012 Michael Clemens
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import RPi.GPIO as GPIO
import os
import pyudev
from mpd import (MPDClient, CommandError)
from socket import error as SocketError
from time import sleep
# Configure MPD connection settings
HOST = 'localhost'
PORT = '6600'
CON_ID = {'host':HOST, 'port':PORT}
# Configure IO ports
BUTTON = 17
LED = 24
GPIO.setmode(GPIO.BCM)
GPIO.setup(BUTTON, GPIO.IN)
GPIO.setup(LED, GPIO.OUT)
## Some functions
def mpdConnect(client, con_id):
"""
Simple wrapper to connect MPD.
"""
try:
client.connect(**con_id)
except SocketError:
return False
return True
def loadMusic(client, con_id, device):
os.system("mount "+device+" /music/usb")
os.system("/etc/init.d/mpd stop")
os.system("rm /music/mp3/*")
os.system("cp /music/usb/* /music/mp3/")
os.system("umount /music/usb")
os.system("rm /music/mpd/tag_cache")
os.system("/etc/init.d/mpd start")
os.system("mpc clear")
os.system("mpc ls | mpc add")
os.system("/etc/init.d/mpd restart")
def flashLED(speed, time):
for x in range(0, time):
GPIO.output(LED, GPIO.LOW)
sleep(speed)
GPIO.output(LED, GPIO.HIGH)
sleep(speed)
def updateLED(client):
# adjust LED to actual state
if client.status()["state"] == "play":
GPIO.output(LED, GPIO.LOW)
else:
GPIO.output(LED, GPIO.HIGH)
def checkForUSBDevice(name):
res = ""
context = pyudev.Context()
for device in context.list_devices(subsystem='block', DEVTYPE='partition'):
if device.get('ID_FS_LABEL') == name:
res = device.device_node
return res
def main():
## MPD object instance
client = MPDClient()
mpdConnect(client, CON_ID)
status = client.status()
print status
timebuttonisstillpressed = 0
flashLED(0.1, 5)
updateLED(client)
while True:
device = checkForUSBDevice("1GB") # 1GB is the name of my thumb drive
if device != "":
# USB thumb drive has been inserted, new music will be copied
flashLED(0.1, 5)
client.disconnect()
loadMusic(client, CON_ID, device)
mpdConnect(client, CON_ID)
print client.status()
flashLED(0.1, 5)
# wait until thumb drive is umplugged again
while checkForUSBDevice("1GB") == device:
sleep(1.0)
flashLED(0.1, 5)
if GPIO.input(BUTTON) == True:
if timebuttonisstillpressed == 0:
# button has been pressed, pause or unpause now
if client.status()["state"] == "stop":
client.play()
else:
client.pause()
updateLED(client)
elif timebuttonisstillpressed > 4:
# go back one track if button is pressed > 4 secs
client.previous()
flashLED(0.1, 5)
timebuttonisstillpressed = 0
timebuttonisstillpressed = timebuttonisstillpressed + 0.1
else:
timebuttonisstillpressed = 0
sleep(0.1)
# Script starts here
if __name__ == "__main__":
main()
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