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@fvdbosch /radio.py Secret
Last active Apr 17, 2016

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Internet Radio Player with Raspberry Pi, PiFace CAD and MPD/MPC
import pifacecad
import os
import sys
import subprocess
from time import sleep
backlight = 0
status = "stopped"
channel_pos = 0
channelLink = ["mms://streaming.q-music.be/QBE_HI", "http://mp3.streampower.be/stubru-high.mp3"]
channelName = ["Q-Music BE", "Studio Brussel"]
# Update display and perform action depending on button pressed
def update_pin_text(event):
global channel_pos
global status
if(event.pin_num == 0):
status = "playing"
os.system('mpc play')
event.chip.lcd.set_cursor(0, 1)
event.chip.lcd.write_custom_bitmap(1)
event.chip.lcd.write(" ")
display_channel()
display_playlist()
elif(event.pin_num == 1):
status = "stopped"
os.system('mpc stop')
event.chip.lcd.set_cursor(0, 1)
event.chip.lcd.write_custom_bitmap(2)
event.chip.lcd.write(" ")
clear_channel()
elif(event.pin_num == 2 and status == "playing" and channel_pos > 1):
os.system('mpc prev')
clear_channel()
display_channel()
display_playlist()
elif(event.pin_num == 3 and status == "playing" and channel_pos < len(channelLink)):
os.system('mpc next')
clear_channel()
display_channel()
display_playlist()
elif(event.pin_num == 4):
global backlight
if(backlight == 1):
event.chip.lcd.backlight_off()
backlight = 0
else:
event.chip.lcd.backlight_on()
backlight = 1
elif(event.pin_num == 5):
sleep(1)
elif(event.pin_num == 6):
os.system('mpc volume -5')
display_volume()
elif(event.pin_num == 7):
os.system('mpc volume \+5')
display_volume()
else:
sleep(1)
# Create the playlist with configurable internet radio channels
def create_playlist():
subprocess.check_output("mpc clear", shell=True, stderr=subprocess.STDOUT, universal_newlines=True)
for channel in channelLink:
subprocess.check_output("mpc add " + channel, shell=True, stderr=subprocess.STDOUT, universal_newlines=True)
# Define and store custom bitmaps to be displayed
def custom_bitmaps():
speaker = pifacecad.LCDBitmap([1,3,15,15,15,3,1,0])
play = pifacecad.LCDBitmap([0,8,12,14,12,8,0,0])
stop = pifacecad.LCDBitmap([0,31,31,31,31,31,0,0])
playlist = pifacecad.LCDBitmap([2,3,2,2,14,30,12,0])
cad.lcd.store_custom_bitmap(0, speaker)
cad.lcd.store_custom_bitmap(1, play)
cad.lcd.store_custom_bitmap(2, stop)
cad.lcd.store_custom_bitmap(3, playlist)
# Init display by showing idle state
def init_display():
cad.lcd.blink_off()
cad.lcd.cursor_off()
cad.lcd.clear()
cad.lcd.set_cursor(11, 1)
cad.lcd.write_custom_bitmap(0)
display_volume()
# Retrieve and display channel name based on playlist position
def display_channel():
global channel_pos
channel = subprocess.check_output("mpc status | grep playing", shell=True, stderr=subprocess.STDOUT, universal_newlines=True)
channel = channel[channel.find("#")+1:channel.find("/")]
channel_pos = int(channel)
channel = channelName[int(channel)-1]
cad.lcd.set_cursor(0, 0)
cad.lcd.write(channel)
# Write an empty row
def clear_channel():
cad.lcd.set_cursor(0, 0)
cad.lcd.write(" ")
# Retrieve plylist position and size from mpc and display
def display_playlist():
playlist = subprocess.check_output("mpc status | grep playing", shell=True, stderr=subprocess.STDOUT, universal_newlines=True)
playlist = playlist[playlist.find("#")+1:playlist.find("/")+2]
cad.lcd.set_cursor(4, 1)
cad.lcd.write_custom_bitmap(3)
cad.lcd.write(playlist)
# Retrieve volume level from mpc and display
def display_volume():
volume = subprocess.check_output("mpc status | grep volume", shell=True, stderr=subprocess.STDOUT, universal_newlines=True)
volume = volume[7:volume.find("%")+1]
cad.lcd.set_cursor(12, 1)
cad.lcd.write(volume)
cad = pifacecad.PiFaceCAD()
custom_bitmaps()
create_playlist()
init_display()
listener = pifacecad.SwitchEventListener(chip=cad)
for i in range(8):
listener.register(i, pifacecad.IODIR_FALLING_EDGE, update_pin_text)
listener.activate()
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