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       comedi_data_read_hint  -  tell  driver which channel/range/aref you are
       going to read from next


       #include <comedilib.h>

       int comedi_data_read_hint (comedi_t * device, unsigned  int  subdevice,
       unsigned int channel, unsigned int range, unsigned int aref);


       Used   to   prepare   an   analog   input  for  a  subsequent  call  to
       comedi_data_read().  It is not necessary to use this function,  but  it
       can  be  useful  for  eliminating  inaccuaracies caused by insufficient
       settling times when switching the channel or gain on an  analog  input.
       This  function  sets  an  analog  input to the channel, range, and aref
       specified but does not perform an actual analog to digital  conversion.

       Alternatively,  one  can  simply  use comedi_data_read_delayed(), which
       sets  up  the  input,  pauses  to  allow  settling,  then  performs   a

                                28 October 2007