Matrix is getting scanned and converted into boot-style HID interface.
Most keys are basically working.
However the enabled debug UART prevents use of the following keys:
DELETE PRINTSCREEN INSERT PAGEUP PAGEDOWN
as S15 is in fixed output mode and thus can't be sensed right now.
Tested:
- UART debug output works at 115200 baud (pad S15)
- Jumps to bootloader on watchdog timeout
- Jumps to bootloader when Return is held while plugging in USB
- Jumps to bootloader when UTX/URX lines are shorted
- Measured max GPIO toggling speed is 3MHz
Tobias Diedrich