qmk_firmware VS qmk-firmware-ploopyco-dev

I agree that reduced finger movement is a crucial step in achieving typing efficiency. This is nicely solved by mod tap modifiers in QMK/ZMK[1] where key acts as a char when tapped and as a layer while pressed.

[1]: https://github.com/qmk/qmk_firmware/blob/master/docs/mod_tap...

Separate wireless controller, see the glue code at [0]

[0]: https://github.com/qmk/qmk_firmware/compare/master...nuphy-s...

If you have a keyboard that runs QMK firmware[0] with the VIA[1] feature enabled[2], then there is a convenient testing app available from the same place you customize your keys [3].

[0] https://qmk.fm/

I made a layout that I'm happy with. Spanish is my native language, so it has characters like the accents and 'ñ', but it's meant to be used for programming as well. Visual Studio uses a lot of Ctrl and Ctrl + Shift shortcuts, so I left them in the same place as the default Corne layout so I can press them both with my pinkie finger. Perhaps some of the ideas are useful to you.

Also, it would be possible to do this for the RP2040. However, it needs some work to get working. but for example: https://github.com/qmk/qmk_firmware/pull/20999

Ok, it's an ST7735, not too different from the ST7789. You should be able to get running by looking at their files in the QMK repo and going from there. You should also check their resources page.

UPDATE: after fluffing around a little bit, I have manged to fix this code: https://github.com/qmk/qmk_firmware/blob/master/keyboards/lily58/keymaps/bongocat_wpm_responsive/keymap.c and flash it successfully - it seems not to be working correctly as the cat is only hanging there and does not respond to the wmp count. If anybody spots anything wrong in the code please let me know!(C is not my language but I am a programmer, I am gonna get at it again over the weekend if I have time left)

The links you have are for the Classic trackball. You should use https://github.com/ploopyco/qmk-firmware-ploopyco-dev/blob/ploopyco/thumb/keyboards/ploopyco/trackball_thumb/

You can alternatively download https://github.com/ploopyco/qmk-firmware-ploopyco-dev/archive/refs/heads/master.zip

git remote add ploopyco https://github.com/ploopyco/qmk-firmware-ploopyco-dev.git git fetch ploopyco git checkout --track ploopyco/ploopyco/thumb

If there's interest, I can see about getting the changes merged into either the ploopy fork of qmk or upstream qmk (or both).

https://github.com/ploopyco/nano-qmk-firmware/tree/pinkyball/keyboards/ploopyco/trackball_nano#customzing-your-ploopy-nano-trackball

I've got the ADNS working in QMK. Check it out if you want.