updi4avr
There are 3 repositories under updi4avr topic.
askn37/askn37.github.io
Product of Open-Source-Software and Open-Source-Hardware Development for modernAVR
askn37/multix-zinnia-updi4avr-firmware-builder
UPDI High-Voltage Programmer
askn37/UPDI4AVR-Software
UPDI (Unified Program and Debug Interface) host firmware over serial