The CREATE USB Interface (or CUI board) is made and produced by Dan Overholt (AAU, DK). It is IMO a good alternative to the more famous and more industrial Arduino, and I had the opportunity to play a bit with it.
Anyway, the point is the following:
CUI boards are provided as HID usb devices, so, reading data from them means reading a HID device.
The little source provided here just does that for Linux! :
Warning; this is not a specific driver for the CUI board, this is not a ready made application, and this is provided without guarantee of any kind :). But if you are a decent C programmer, this should just help get you started!