[How to do instruction] 128x64 OLED with Song Status and Spectrum Display on Raspberry Pi

[fdealexa]

Hi Francesco

I have updated the BCM 2835 library to the latest version 1.75, tested on a fresh install of Moode 9 on a Pi4 with an I2C and an SPI display, and pushed the changes to the mpd_oled reposiitory.

If you (or anyone else) builds the latest mpd_oled from source on a Pi5 then please let me know if it is working with an SPI display. Once I have confirmation then I will build a new mpd_oled binary package.

Regarding the mpd_oled binary package failure on Moode 9, it looks like the missing package libfftw3-3 is just a dummy package that causes other packages to be installed, and I can just list these individual packages instead, so should be a very minor change.


Adrian.

Hi Adrian,
Thanks for your time; unfortunatly with the new modification, it does not run: I am not sure if the following feelings can help:
1. the system stucks at 100% of load (of 1 cpu of course) - (please note that on I2C it doesn't happen and runs correctly).

Code:

top - 08:54:27 up 18 min,  1 user,  load average: 1.10, 1.08, 0.73
Tasks: 175 total,   2 running, 173 sleeping,   0 stopped,   0 zombie
%Cpu(s): 25.8 us,  1.7 sy,  0.0 ni, 72.2 id,  0.0 wa,  0.0 hi,  0.3 si,  0.0 st
MiB Mem :   8052.4 total,   6873.5 free,    357.0 used,    926.3 buff/cache
MiB Swap:      0.0 total,      0.0 free,      0.0 used.   7695.5 avail Mem

   PID USER      PR  NI    VIRT    RES    SHR S  %CPU  %MEM     TIME+ COMMAND
 13053 root      20   0   24160   2048   2048 R 100.0   0.0   7:56.24 mpd_oled
  9392 mpd       20   0  634176  42464  29696 S   5.0   0.5   0:51.76 mpd
    22 root      20   0       0      0      0 S   0.3   0.0   0:00.12 ksoftir+
   655 root      20   0   91552  20992  15360 S   0.3   0.3   0:00.85 winbindd
   666 root      20   0   92256  18480  12800 S   0.3   0.2   0:00.81 winbindd
  8551 root      20   0  100512  23040  16896 S   0.3   0.3   0:00.60 rpcd_ls+
     1 root      20   0  170272  12192   8192 S   0.0   0.1   0:04.57 systemd
     2 root      20   0       0      0      0 S   0.0   0.0   0:00.00 kthreadd

2. it seems that "/dev/gpiomem" does not longer exists:

Code:

pi@MoOde-FdA-Test5:~/mpd_oled $ ls -lia /dev/g*
88 crw-rw---- 1 root gpio 254, 0 Jun 23 16:06 /dev/gpiochip0
89 crw-rw---- 1 root gpio 254, 1 Jun 23 16:06 /dev/gpiochip1
90 crw-rw---- 1 root gpio 254, 2 Jun 23 16:06 /dev/gpiochip2
91 crw-rw---- 1 root gpio 254, 3 Jun 23 16:06 /dev/gpiochip3
131 crw-rw---- 1 root gpio 254, 4 Jun 23 16:06 /dev/gpiochip4
333 crw-rw---- 1 root gpio 235, 0 Jun 23 16:06 /dev/gpiomem0
329 crw-rw---- 1 root gpio 239, 0 Jun 23 16:06 /dev/gpiomem1
330 crw-rw---- 1 root gpio 238, 0 Jun 23 16:06 /dev/gpiomem2
331 crw-rw---- 1 root gpio 237, 0 Jun 23 16:06 /dev/gpiomem3
332 crw-rw---- 1 root gpio 236, 0 Jun 23 16:06 /dev/gpiomem4
pi@MoOde-FdA-Test5:~/mpd_oled $

Please do not hesitate to ask to test more modifications: I just received the pi5 and I tested immediatelly the mpd_oled because somebody else had this problem and I would help him ( "lepetitdiable" at this thread ).
Best regards and thank you very much,
Francesco