I was asking a question about screen brightness today and it was stated ‘… make sure SPI is enabled’.
I didn’t know what SPI was. It appears to stand for Serial Peripheral Interface. It looks as if it needs to be enabled to send data in both directions, e.g., from the R Pi to the screen and from the screen to the R Pi. I would have thought this was a vital job of an OS so I am not sure why it wouldn’t be enabled already.
Anyone any more light on the subject!