usbdk
There are 2 repositories under usbdk topic.
daynix/UsbDk
Usb Drivers Development Kit for Windows
eltortugo/audioxtreamer
ASIO driver, Usb Driver, FX2LP Firmware, VHDL Fpga, Schematics & PCB Layout for the AudioXtreamer, a USB 2.0 32ch Audio/Midi interface for retrofitting into digital mixers/interfaces.