currently I try to get the USB of my UC3B working. What I want to do is to create a device, that sends data from different sensors to the PC. So first I need to get USB running. I took a look at the HID example from the ASF and it left me a bit confused. My second try was to initialize USB by following the manual. I got the endpoint0 configured but then I got stuck with the enumerating. So is there a complete guide for the initialization, or at least a book describing the hardware of USB? I searched on the internet, but that brought code snippets up only.