Work in progress
RP2354A-specific design is based on https://datasheets.raspberrypi.com/rp2350/Minimal-KiCAD.zip
The USB HID implementation is based on various sources:
- https://github.com/hathach/tinyusb
- https://github.com/raspberrypi/pico-examples
- https://github.com/bluekeyes/pico-12vrgb-hid-controller