deskthority

that's not transparent, he's just got no mask on it, the picture is in the tinning of the board. mirrorish.

Ordinary FR4 pcb does let a lot of light through when there's no copper on either side though.

Cool. That is probably what I am looking for.

Well, I don't think I need an RTOS or anything like that, and I'm actuallly interested in writing the keyboard parts of the code myself. I've done a fair bit of microcontroller programming, but mostly in assembler, and I've never touched USB. (so digging through the many layers of code to find what ...

Does anyone have any advice, tutorials, or example code for getting the STM32f072 running as a keyboard?
I've been messing around for weeks trying to get the code generated by stm32cubemx converted from its mouse-centric starting point into a keyboard. I followed an example on ST's youtube channel ...