Collection of various development boards for microcontrollers (e.g., CH55x, CH32, PY32, STC8, STM32) and accompanying example software.

Some ultra low cost, unique layouts mechanical macropad using CH552G

F.A. Keyboard Firmware

An open sourced python tool for flashing WCH CH55x series USB microcontroller with bootloader v2.30, v2.31 & v2.40.

Rotary Encoder with NeoPixels and USB Interface

A BLE & 2.4G Keyboard Firmware using nrf52810/52811/52832

Simple ISP Flash Tools for various Microcontrollers

An Open-Source CMSIS-DAP Debug Probe based on DAPLink and USB bus convert and it can realize USB convert to serial interface based in CH552, low-cost of $5 dollars

Templates for bare-metal firmware development for some entry-level microcontrollers

Programmable MacroPad with Rotary Encoder and NeoPixels

USB controlled I²C OLED

A full 32 key mechanical keyboard that can be made for only $5

USB controlled nRF24L01+ 2.4GHz Transceiver

Simple Board that can be used as a Mouse Jiggler, a Rubber Ducky, or a Caps Blocker

小巧的使用CH552实现的DAPLink

CMSIS-DAP compliant debugging probe with SWD, JTAG, and VCP support

Programmable Macropad with NeoPixels

CMSIS-DAP compliant SWD Programmer

CH55X assembly instruction description

USB-Blaster firmware that runs on cheap with CH552G chip