Creating a USB device firmware

[e_l_tang]

I have a project which I would like to convert to use ChibiOS. It a) runs on an AVR, b) implements a CDC device, and c) implements a HID device. I have found a demo project which does the first two, but not the last. Does anyone have any idea about how I might go about doing this? I made a separate post asking about a HID driver here.