Please post Comedi related questions to the Comedi group at:
http://stm.lbl.gov/comedi/mailinglist.html
FYI, NI does have register level programming source code available for a wide range of boards that can be used to program the hardware in Linux and other operating systems. Contact you local sales person to determine if code for your specific hardware is available.
authored byChristian L, CLA
Systems Engineering Manager - Automotive and Transportation
NI - Austin, TX