USBreadboardIT board files and test firmware+software
The firmware is based on m-stack by signal11 and can be opened in MPLAB X and compiled with the XC8 compiler by Microchip. Please note that the enclosed project is pre-configured with ROM settings to be used with the 512-words DFU booloader by majbthrd, but can easily be adapted to be uploaded through ICSP (just remove the 'ROM ranges' and 'Codeoffset' options).
The software, written in python, requires PySide and cython-hidapi, both installable through pip either on Windows or Linux.
Work in progress, see the hackaday.io page for details