Well, I don't see how you could get at the information necessary to talk with this device from the link you provide. Doesn't National Semiconductors have a Software Reference driver with SDK you can purchase for this device? You definitely need Software driver specific informations, such as the manufacturer and product ID, but also some more informations about the endpoints and possible stream formats.
Yes it seems rather difficult to me. Not a single weekend project for sure. Rolf Kalbermatter
