SPI – Learnt a new term today

I was asking a question about screen brightness today and it was stated ‘… make sure SPI is enabled’.

microminecraftphoto

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!

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