Volumio2で音楽5 [Volumio]
有機ELディスプレイに曲名や歌手名を出すためにプログラムを書きます。
以下のプログラムを書きます。
次に、起動時にデーモンとして動くように登録します。
以下の入力します。
コマンドを入力して有効にします。
再起動すれば、アルバム名、曲名、歌手名、サンプルレートが表示されます。
root@volumio:~# /var/tmp/mkinitramfs_8pJogT/bin/vi SSD1306.py
以下のプログラムを書きます。
#!/usr/bin/python
# -*- coding: utf-8 -*-
import os
import sys
import smbus
import time
import signal
from PIL import Image
from PIL import ImageDraw
from PIL import ImageFont
from socketIO_client import SocketIO
PIDFILE='/var/run/SSD1306.pid'
class SSD1306(object):
DISPLAYOFF = 0xAE
DISPLAYON = 0xAF
DISPLAYALLON = 0xA5
DISPLAYALLON_RESUME = 0xA4
NORMALDISPLAY = 0xA6
INVERTDISPLAY = 0xA7
SETREMAP = 0xA0
SETMULTIPLEX = 0xA8
SETCONTRAST = 0x81
CHARGEPUMP = 0x8D
COLUMNADDR = 0x21
COMSCANDEC = 0xC8
COMSCANINC = 0xC0
EXTERNALVCC = 0x1
MEMORYMODE = 0x20
PAGEADDR = 0x22
SETCOMPINS = 0xDA
SETDISPLAYCLOCKDIV = 0xD5
SETDISPLAYOFFSET = 0xD3
SETHIGHCOLUMN = 0x10
SETLOWCOLUMN = 0x00
SETPRECHARGE = 0xD9
SETSEGMENTREMAP = 0xA1
SETSTARTLINE = 0x40
SETVCOMDETECT = 0xDB
SWITCHCAPVCC = 0x2
OLED_WIDTH = 128
OLED_HEIGHT = 64
OLED_PAGE_COUNT = 8
OLED_SIZE = ( OLED_WIDTH , OLED_HEIGHT )
OLED_TARGET = 0x3C
OLED_CMDMODE = 0x00
OLED_DATAMODE = 0x40
def command(self, *cmd):
self.__bus.write_i2c_block_data(self.OLED_TARGET,self.OLED_CMDMODE,list(cmd))
def cleanup(self):
self._hide()
self.clear()
self.__bus.close()
def clear(self):
self.display(Image.new("1",self.OLED_SIZE))
def show(self):
self.command(self.DISPLAYON)
def hide(self):
self.command(self.DISPLAYOFF)
def contrast(self,level):
self.command(self.SETCONTRAST,level)
def __init__(self):
self.buffer = [0] * self.OLED_PAGE_COUNT * self.OLED_WIDTH;
self.__bus = smbus.SMBus(1)
def init(self):
self.command(
self.DISPLAYOFF,
self.SETDISPLAYCLOCKDIV, 0x80,
self.SETMULTIPLEX, 0x3F,
self.SETDISPLAYOFFSET, 0x00,
self.SETSTARTLINE,
self.CHARGEPUMP, 0x14,
self.MEMORYMODE, 0x00,
self.SETSEGMENTREMAP,
self.COMSCANDEC,
self.SETCOMPINS, 0x12,
self.SETPRECHARGE, 0xF1,
self.SETVCOMDETECT, 0x40,
self.DISPLAYALLON_RESUME,
self.NORMALDISPLAY)
self.contrast(0xCF)
self.clear()
self.show()
def display(self,image):
pix = image.load()
index = 0
for page in range(8):
for x in range(128):
bits = 0
for bit in [0, 1, 2, 3, 4, 5, 6, 7]:
bits = bits << 1
bits |= 0 if pix[(x, page*8+7-bit)] == 0 else 1
self.buffer[index] = bits
index += 1
self.command(self.COLUMNADDR, 0x00, 128-1, self.PAGEADDR, 0x00, 8-1)
for i in range(0, len(self.buffer), 16):
self.__bus.write_i2c_block_data(self.OLED_TARGET,self.OLED_DATAMODE,self.buffer[i:i+16])
class socketio(object):
def __init__(self):
self.album = ''
self.title = ''
self.artist= ''
self.samplerate = ''
self.bitdepth = ''
def init(self):
self.socketIO = SocketIO('localhost', 3000)
self.socketIO.on('pushState', self.on_pushState)
self.ssd = SSD1306()
self.ssd.init()
def max_length(self,font,text):
length = len(text)
for i in range(0,length-1,1):
w = font.getsize(text[0:i])[0]
if w > 128:
return i + 1
return length
def on_pushState(self,args):
s = ''
b = ''
if 'samplerate' in args :
s = args['samplerate']
else:
s = ''
if 'bitdepth' in args:
b = args['bitdepth']
else:
b = ''
if self.album == args['album'] and self.title == args['title'] and self.artist == args['artist'] and self.samplerate == s and self.bitdepth == b :
return
self.album = args['album']
self.title = args['title']
self.artist= args['artist']
self.samplerate = s
self.bitdepth = b
image = Image.new('1', (self.ssd.OLED_WIDTH, self.ssd.OLED_HEIGHT),0)
draw = ImageDraw.Draw(image)
draw.rectangle((0,0,self.ssd.OLED_WIDTH-1, self.ssd.OLED_HEIGHT-1), outline=0, fill=0)
jpfont = ImageFont.truetype('/usr/share/fonts/truetype/takao-gothic/TakaoPGothic.ttf',12, encoding="unic")
draw.text((0,0 ), self.album , font=jpfont, fill=1)
e = 0
length = len(self.title)
e = self.max_length(jpfont,self.title)
if e < length:
draw.text((0,12), self.title[0:e-2] , font=jpfont, fill=1)
draw.text((0,24), self.title[e-2:length] , font=jpfont, fill=1)
else:
draw.text((0,12), self.title , font=jpfont, fill=1)
draw.text((0,36), self.artist, font=jpfont, fill=1)
if 'samplerate' in args and 'bitdepth' in args:
f = '%s | %s' % (self.samplerate, self.bitdepth)
#draw.text((0,50), str(self.samplerate) + '|' + str(self.bitdepth), font=jp
draw.text((0,50), f, font=jpfont, fill=1)
else:
draw.text((0,50), '', font=jpfont, fill=1)
self.ssd.display(image)
print('-----')
print(self.album.encode('utf-8'))
print(self.title.encode('utf-8'))
print(self.artist.encode('utf-8'))
if 'samplerate' in args and 'bitdepth' in args:
#print(str(self.samplerate) + "|" + str(self.bitdepth))
print(f)
else:
print('-NaN-')
print('-----')
def setRandom(self):
self.socketIO.emit('setRandom',{'value' : 'true'})
self.socketIO.emit('getState')
while True:
self.socketIO.wait(seconds=1)
def main_loop():
volumio = socketio()
volumio.init()
volumio.setRandom()
os.remove(PIDFILE)
sys.exit()
def signal_handler(signal,handler):
os.remove(PIDFILE)
sys.exit()
def daemonize():
pid=os.fork()
if pid > 0:
pidf = open(PIDFILE,'w')
pidf.write(str(pid)+'\n')
pidf.close()
sys.exit()
if pid == 0:
signal.signal(signal.SIGINT, signal_handler)
signal.signal(signal.SIGTERM, signal_handler)
main_loop()
if __name__ == '__main__':
daemonize()
次に、起動時にデーモンとして動くように登録します。
root@volumio:~# /var/tmp/mkinitramfs_8pJogT/bin/vi /etc/systemd/system/ssd1306.service
以下の入力します。
[Unit] Description=Volumio2 SSD1306 display [Service] ExecStart=/root/SSD1306.py Restart=always Type=forking PIDFile=/var/run/SSD1306.pid [Install] WantedBy=multi-user.target
コマンドを入力して有効にします。
root@volumio:~# chmod +x SSD1306.py root@volumio:~# systemctl enable ssd1306.service
再起動すれば、アルバム名、曲名、歌手名、サンプルレートが表示されます。
