RaspDAC Mini with moOde 5.x install about mpd_oled

[antiprism]

Hi Rikardo

I recently updated mpd_oled to make it compatible with moOde 5.0.

Regarding the display, SPI isn't well supported and involves modifying the mpd_oled source to include the configuration, specifically the init_display function in display.cpp. Also, I cannot confirm that other changes won't be needed as I have had no feedback from anyone that has used mpd_oled with SPI. If the display can also work with i2c then that would be a better option.

The controller chip also needs to be supported by mpd_oled, and should be SSD1306 or SH1106, so it might be an idea to check that first.

Adrian.

[rikardo1979]

Thanks for your reply here. I do have the display working on moOde like this http://tinyw.in/rCv2

I will take it a part and find more details about it

[antiprism]

Looking at the configuration file from the OLED package referenced in your link, you have

from luma.oled.device import ssd1306
import RPi.GPIO as GPIO
serial = spi(port=0, device=0, gpio_DC=27, gpio_RST=24)
device = ssd1306(serial, rotate=2)

In which case...

In main.cpp, add a line near the beginning of the main function to override whatever OLED you set with -o, which should then ensure SPI initialisation for your display

OledOpts opts;
opts.process_command_line(argc, argv);
opts.oled = OLED_ADAFRUIT_SPI_128x64;  // ADD THIS LINE

In display.cpp, add the SPI configuration

bool init_display(ArduiPi_OLED &display, int oled, unsigned char i2c_addr,
    int reset_gpio, bool rotate180)
{
 
// SPI
  if (display.oled_is_spi_proto(oled)) {
    // SPI change parameters to fit to your LCD
    if ( !display.init(27, 24, OLED_SPI_CS, oled) )     // INCLUDE THESE SETTINGS
      return false;
  }

I am not sure if OLED_SPI_CS will need changing.

I haven't built these changes, so they may include syntax errors. Also, even with the correct initialisation there may be other changes required to get this display working.

Adrian.

[antiprism]

Maybe your OLED isn't connected like the original configuration in the OLED package, as is the case in this message: http://moodeaudio.org/forum/showthread.php?tid=664&pid=9235#pid9235

In which case, edit the display.init() function cal according to your configuration (the first argument is the DC GPIO number, and the second is the RESET GPIO number).

[antiprism]

Closing. Reopen if the issue remains.