As I mentioned in Part 1 of this two-part mini-series, odd ideas are popping in and out of my head all the time, and every now and then I share my ponderings with the readers of Programmable Logic ...

[David] is building a project with an OLED, a keyboard, and an RP2040. He’s perfected a scanning routine in C to work with the keyboard, but he still had some places he wanted to use even lower-level ...