Cannot detect SPI

#1

Hi all!

I am trying to make SPI devices work with my Radxa Zero using Ubuntu Focal. I have changed /boot/uEnv.txt like this:

overlays=meson-g12a-uart-ao-a-on-gpioao-0-gpioao-1 meson-g12a-spi-spidev 
param_spidev_spi_bus=0 
param_spidev_max_freq=10000000

But after reboot I cannot detect any SPI device both when using WaveShare E-Ink Display or just shorten pins 12 and 18. MRAA example from here returns Failed to initialize SPI and also I don’t see any spidev in /dev.

#2

I’ve tried different SPI (spi_bus=1) and a number of displays to connect. But still nothing works. Could it be a problem with Ubuntu? Should I try to install something like Armbian?

#3

I think you really need to have a custom overlay for it. If you search the forum there are some posts talking about getting SPI display to work, and you should not use mraa for controlling SPI display.

#4

Did you get it working ?