This code is for use with the Scarab project created by Boldport.
The target is Microchip's ATtiny1614. The project is set up to be opened using MPLAB-X v5.30 or greater, together with the XC8 compiler.
The ATtiny1614 programing interface is UPDI, so you'd need a UPDI programmer and connect [power, ground, UPDI] wires to the PCB to get the hex onto the chip.
This software is distributed under GPL 3; see LICENSE.
Many thanks to LuckResistor for helping with the architecture of the code and suggesting better ways to implement the functionality in a clean and modular way.