Open-source boards designed in KiCad by RigoLigoRLC on GitHub, from 3 repositories. A board’s address here is its repository’s there.
RigoLigoRLC/pico-loongson-ejtag
Loongson is not making cheap EJTAG debug probes, so we make these for them to help them expand their ecosystem. Based on reverse engineer and reimplemented with RP2040.
RigoLigoRLC/LS1C203Core
Loongson LS1C203 Microcontroller Core Board in Bluepill form factor
RigoLigoRLC/AXP313-EVB
An attempt at controlling AXP313 with a MCU for arbitrary voltage output