This repo contains a set of "cores" which adds support for some members of the Atmel AVR ATMega16/32U4 family of microcontroller to the Arduino IDE.
The following micro controllers are supported:
- ATmega16U4
- ATmega32U4
In the Arduino IDE, click File | Preferences.
Under Additional Boards Manager URLs, add https://raw.githubusercontent.com/magoldsm/ATMega16-32U4-Bare-Metal/main/package_magoldsm_atmegaXXu4_index.json. Use comma to separate multple entries.
Finally, use Tools | Boards | Boards Manager to add the atmegaxxu4 package.