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I turned this touchscreen RP2040 into a touchpad. (lemmy.world)
submitted 3 years ago* (last edited 3 years ago) by to c/ergomechkeyboards@lemmy.world
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I took a WaveShare RP2040-Touch-LCD-1.28and made a program to use it as a touchscreen. This is still very much in the beta phase but the proof of concept works. Here’s my GitHub repo for it.

I’m planning on integrating it into my next split near the thumb cluster.

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[–] 2 points 3 years ago (1 child)

This is super cool! Is the firmware flexible enough to support a similar ESP32 based chip? Something like this. That'll then allow you to make the touchpad wireless over BLE and just stick it on any keyboard as long as you have a way to power it.

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  • [–] [S] 1 point 3 years ago (1 child)

    You could pull the trackpad logic out of this but it would need some rewrite. For the next version , I’m actually looking into implementing the drivers into QMK keyboard firmware as it has a whole trackpad management as well that does what I wrote and more and also is much more flexible.

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  • [–] 2 points 3 years ago (1 child)

    Oh neat! QMK seems to be the most appropriate for trackpads. I was thinking of something that could be wireless which afaik QMK doesn't support. And ZMK's support for pointer devices is not great just yet.

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  • [–] [S] 1 point 3 years ago (1 child)

    I hear you. The two issues are this model has no wireless as it’s rp2040. Also a touchscreen is pretty power hungry for a wireless device like a keyboard that is supposed to be charged infrequently.

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  • [–] 2 points 2 years ago

    Yeah, both valid points. I was asking about the firmware supporting an esp32 specifically for the wireless capabilities. And on terms of battery life, I went overboard and installed 3000mAh batteries in my keyboard that I can use to power the display 😂

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