Touch Screen with Omega2+ and Arduino Dock 2



  • I have an Onion Omega 2+, Arduino Dock 2 and a 2.8 TFT Touch Shield for Arduino Uno.

    I tested the touch screen with my Arduino Uno and it works perfectly, using the example code from the Adafruit libraries to test the touch screen.

    My problem is when I then upload the same example to my Omega (while it’s in the Arduino Dock) I can’t get the touch screen to work. At first the display works fine however the touch screen functionality doesn’t work at all.

    After a bit of research I found if I set via terminal:
    fast-gpio set-input 15
    fast-gpio set-input 16
    fast-gpio set-input 17

    I could get the touch screen working partially. That is, if I touch the screen the button changes state (as expected) except suddenly after that it’s as if the screen it repeatedly being tapped, without myself physically touching it again the 3 different buttons across the screen changes state as if theyre being touched when they are not. So if I can work out why the screen thinks it’s being touched when its not after the first press it’d solve my problem!

    Can anyone enlighten me on what would cause this, and if possible point me in the right direction!

    Thanks


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