Use a single-key CH554G-powered macro pad as a dedicated BIOS/UEFI setup/boot key.
Use a single-key macro pad from Amazon
as a wired function key (F3 by default, see KBD_KEY_BIOS in src/config.h)
to enter BIOS/UEFI setup/boot without any other wired keyboard present (if a
Bluetooth keyboard is used primarily, for example).
Requires installation of sdcc and wchisp.
Short P3.6 (pin 12) to VCC (pin 15) while connecting the board to power.
This enters bootloader mode. See Mingjie Li's CH552/CH554 Development
Guide for
pinout.
$ wchisp erase$ make$ make flashThis software is based on the work of Stefan Wagner (wagiminator).
Original project: https://github.com/wagiminator/CH552-MouseWiggler
This software is also licensed under CC BY-SA 3.0.