• Maybe you could try just setting up the display without images and trying out some colours to make sure it's working right. Looking at what you said above:

    0000FF = yellow
    00ff00 = blue
    ff0000 = black (no color)
    ffffff = white

    My guess is the screen's colour format is 16 bit BGR565 (BBBBBGGGGGGRRRRR). However it could be that the byte order is wrong, which would explain a lot. In that case it'd be something like GGGBBBBBRRRRRGGG which would be super confusing.


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