The Arduino Due code uses a poor-man's interrupts, scheduling them between loop iterations. Proper USB interrupts can now be enabled via new member functions and interrupt-driven code can handle most, ...

This is a C++ library for the Arduino IDE that makes it easy to temporarily pause USB interrupts and restore them later. When you program an ATmega32U4 board such as the Arduino Leonardo from the ...

I used V-USB for a couple of projects with my own code from scratch (i.e. No Arduino etc) and they work fine. I am using Win7 X64+libusb and use Vendor Specific commands only.