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adacosta / gist:177342
Created August 29, 2009 00:27
require 'rubygems'
require 'ffi'
module USB
extend FFI::Library
ffi_lib '/usr/local/lib/libusb.dylib'
USB_CLASS_PER_INTERFACE = 0
USB_CLASS_AUDIO = 1
USB_CLASS_COMM = 2
USB_CLASS_HID = 3