Ok, I understand. The library has “arm” in the name, but it may not have anything arm-specific in it. I can’t say for sure because I have only used it with I2C on the Pi. The screenshot of mpd_oled running on the desktop was running on x86 and used this library. Anyway, if it turns out that the library doesn’t work with I2C on a PC then it needs to be modified so it does work!
So cool. Well done!
Thanks to you’re support.
So it does work, the clock is updating.
So now I am going to recover my main player (yes which I should not have been using for testing purpose) and do the same on a Dell Wyse 3040.
Ooh very nice! What’s the frame rate like? 
IMG_4242.zip (6.1 MB)
No clue, need to get CAVA running before I will reinstall this device.
At this moment 've started it with
mpd_oled -o SSD1306,128X64,I2C - f 50
Scrolling looks acceptable. Please rename zip to MOV (it’s not a zip archive)
So steps taken for this module to run MPD_OLED on a x86
Install all dependencies:
sudo apt-get update
sudo apt-get install build-essential autoconf make libtool libfftw3-dev libiniparser-dev libmpdclient-dev libi2c-dev lm-sensors libasound2-dev autoconf-archive i2c-tools dkms
Get headers to perform make (will break ATO):
wget https://github.com/volumio/x86-kernel-headers/blob/master/linux-headers-5.10.139-volumio_5.10.139-volumio-1_amd64.deb
sudo dpkg -i linux-headers-5.10.139-volumio_5.10.139-volumio-1_amd64.deb
sudo ln -s /usr/src/linux-headers-5.10.139-volumio /lib/modules/5.10.139-volumio/build
reboot
Get driver:
git clone https://github.com/gschorcht/i2c-ch341-usb.git
cd i2c-ch341-usb
make
sudo make install
Check if loaded:
dmesg | grep i2c-ch341-usb
Add volumio to group:
sudo addgroup volumio i2c
newgrp - i2c
Build and install cava:
git clone https://github.com/karlstav/cava
cd cava
./autogen.sh
./configure --disable-input-portaudio --disable-input-sndio --disable-output-ncurses --disable-input-pulse --program-prefix=mpd_oled_
make
sudo make install-strip
cd .. # leave cava directory
Build and install mpd_oled:
git clone https://github.com/antiprism/libu8g2arm.git
cd libu8g2arm
./bootstrap
mkdir build
cd build
CPPFLAGS="-W -Wall -Wno-psabi" ../configure --prefix=/usr/local
make
cd ../.. # leave libu8g2arm/build directory
git clone https://github.com/antiprism/mpd_oled_dev
cd mpd_oled_dev
./bootstrap
LIBU8G2_DIR=../libu8g2arm CPPFLAGS="-W -Wall -Wno-psabi" ./configure --prefix=/usr/local
make
sudo make install-strip
Configure MPD to copy its audio output to a named pipe
(Ignore the errors)
wget -N http://pitastic.com/mpd_oled/packages/mpd_oled_volumio_install_latest.sh
sudo bash mpd_oled_volumio_install_latest.sh
sudo mpd_oled_volumio_mpd_conf_install
Run MPD_OLED:
Check for the correct bus:
volumio@volumiox86:~$ dmesg | grep i2c-ch341-usb
[ 4125.761992] i2c-ch341-usb 1-1:1.0: ch341_i2c_probe: created i2c device /dev/i2c-14
Use correct bus number:
mpd_oled -o SSD1306,128X64,I2C,bus_number=14 -f 50
or:
/usr/local/bin/mpd_oled -o SSD1306,128X64,I2C,bus_number=$(dmesg | grep -iE "ch341_i2c_probe: created i2c device" | sed 's/^.*[/]//' | sed 's/.*-//') -f 50
1 Like
Shall I move these last posts to a new topic, to avoid confusion with MPD_OLED for the rPi and development efforts on the x86?
Yes please 
tried the same on a Dell Wyse 3040, less lucky:
dmesg | grep i2c-ch341-usb
[ 370.009593] i2c-ch341-usb 1-2:1.0: ch341_cfg_probe: output gpio0 gpio=0 irq=0
[ 370.009599] i2c-ch341-usb 1-2:1.0: ch341_cfg_probe: output gpio1 gpio=1 irq=1
[ 370.009602] i2c-ch341-usb 1-2:1.0: ch341_cfg_probe: output gpio2 gpio=2 irq=2
[ 370.009605] i2c-ch341-usb 1-2:1.0: ch341_cfg_probe: output gpio3 gpio=3 irq=3
[ 370.009609] i2c-ch341-usb 1-2:1.0: ch341_cfg_probe: input gpio4 gpio=4 irq=4 (hwirq)
[ 370.009612] i2c-ch341-usb 1-2:1.0: ch341_cfg_probe: input gpio5 gpio=5 irq=5
[ 370.009615] i2c-ch341-usb 1-2:1.0: ch341_cfg_probe: input gpio6 gpio=6 irq=6
[ 370.009618] i2c-ch341-usb 1-2:1.0: ch341_cfg_probe: input gpio7 gpio=7 irq=7
[ 370.010041] i2c-ch341-usb 1-2:1.0: ch341_i2c_probe: created i2c device /dev/i2c-14
[ 370.010045] i2c-ch341-usb 1-2:1.0: ch341_i2c_set_speed: Change i2c bus speed to 100 kbps
But keep getting errors:
mpd_oled -o SSD1306,128X64,I2C
Failed to write to the i2c bus.
volumio@volumiox86:~/i2c-ch341-usb$ lsmod | grep i2c
i2c_ch341_usb 24576 0
i2c_algo_bit 16384 1 i915
volumio@volumiox86:~/i2c-ch341-usb$ sudo i2cdetect -y 14
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f
10: 10 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f
20: 20 21 22 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f
30: 30 31 32 33 34 35 36 37 38 39 3a 3b 3c 3d 3e 3f
40: 40 41 42 43 44 45 46 47 48 49 4a 4b 4c 4d 4e 4f
50: 50 51 52 53 54 55 56 57 58 59 5a 5b 5c 5d 5e 5f
60: 60 61 62 63 64 65 66 67 68 69 6a 6b 6c 6d 6e 6f
70: 70 71 72 73 74 75 76 77
An after a reboot of the working one, it gives the same error. So we are not there yet.
After every reboot the probing return different results:
ch341_i2c_probe: created i2c device /dev/i2c-10
ch341_i2c_probe: created i2c device /dev/i2c-0
ch341_i2c_probe: created i2c device /dev/i2c-14
The default I2C bus for md_oled is 1 (/dev/i2c-1). The bus numbers you are getting seem kind of random, but, for example, if the screen is connected on bus 0 then use the command
mpd_oled -o SSD1306,128X64,I2C,bus_number=0
pfff
I did try a lot of options, but combined bus_number with HW_I2C and SW_I2c, which didn’t work.
runing below command, did the trick.
mpd_oled -o SSD1306,128X64,I2C,bus_number=14
MPD_OLED also detect play and stop. Only thing left is cava. Never got the hang of all the pipe stuff.
The frame rate is more than appropriate.
Result!
here is some interesting technical data, that might be use full.
Well done! 
I think I’m gonna pick up one of these to USB adapters 
Just follow the instruction and it should work.
- CAVA needs to be sorted out.
- A way to get the bus address fixed, as currently after every reboot it changes.
1 Like
Thanks! Now I have to pick up a little x86 machine too 
Well 45 euro, for a Dell Wyse 3040, great little piece of hardware. Still a few left.
I had noticed you were using a Del Wyse! I’ve never used one myself but that’s an excellent price for what you get. Also, the super slim Dell USFF Optiplexs are also pretty good, I’m thinking about getting one for plex and now and another for Volumio 
Also got CAVA running, a bit dirty but it works.
(just ran sudo bash mpd_oled_volumio_install_latest.sh, which took care of the CAVA part.)
The bars run smooth, so no issues with frame rates.
Seems we have a winner, a working POC
3 Likes
Did helpt me om er toch dicht bij te blijven.
Super job!
Soms denk ik, “69, and why the hell still doing this”…