**CIGAL Reference Manual, Chapter 7 (Hardware): NIADC**

=====NIADC - National Instruments Analog to digital convertor inputs =====

 **usage: init niadc boardnum param nadc_chans revpol **

CIGAL supports National Instrument's NIDAQ-MX library interface capable of controlling a variety of NI data acquisition devices.  There are separate INIT commands for configuring analog (NIADC) and digital ([[jvs:cigal:manual:chapter7:nidig|NIDIG]]) communication settings.

The INIT NIADC call expects the following arguments (default values in []):
  * boardnum [-1] - the device number (this is required)
  * param [-1] - (this is the 3rd arg to NIDAQ's AI_READ() function)
  * nadc_chans [8] - number of analog channels
  * revpol [0] - bitmask to reverse polarity of selected analog channels

You can also access some NIDAQ library routines directly in CIGAL using the PRIMITIVE command.  A description of the NIDAQ primitive functions can be found in [[jvs:cigal:manual:chapter7:niprims|NIPRIMS]].

**See Also:**\\
[[jvs:cigal:manual:chapter7:nidig|NIDIG]],
[[jvs:cigal:manual:chapter7:niprims|NIPRIMS]],[[jvs:cigal:manual:chapter2:initialize|Initialize]],
[[jvs:cigal:manual:chapter1:configure|Configure]]

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