Thesycon provides demo packages for a lot of microcontrollers.
The demo package includes:
A downloadable firmware image for each demo application.
The complete source code of each demo application.
The required device drivers for use with a Windows PC.
The manuals for the USB Function Library and device classes.
Note: The source code and the appropriate project files contained in the demo package are for documentation only. It is not possible to recompile the applications.