git clone 'https://github.com/soemraws/cl-libusb.git'
cl-libusb provides an easy interface to libusb-0.1. There are two systems/packages: libusb-ffi, which provides a (somewhat lispified) ffi to libusb-0.1, and cl-libusb, which provides an easier interface.
Buffers are dealt with using unsigned byte arrays from grid and foreign-array.
libusb-ffi (and thus cl-libusb) is not complete, but should be usable.
Tested and found to work on: linux amd64 (sbcl) Windows XP Professional 32-bit (clisp, mingw)
To do: Antik is larger than what cl-libusb requires; use static-vectors instead.