For mouse emulation,I refer to this:
“Luckfox Lyra on PicoCalc” Luckfox Lyra on PicoCalc - #210 by hisptoot
Right shift key is mouse mode toggle key in new kbd driver.
Arrow keys control mouse move and square bracket keys control mouse button.
Mouse mode should be useful in pico8 editor.
I installed hisptoot linux (buildroot)_20250419 version and confirmed it.
At that time, I was trying various things, so I don’t know exactly what process enabled mouse emulation.
If this is related to the keyboard firmware,
Keyboard_firmware in hisptoot’s Google Drive described in
may be what will do it.
Or it could be the official latest keyboard firmware
PicoCalc_BIOS_v1.2.bin (Keyboard firmware)
Can someone try this?