Provided by: libcomedi-dev_0.10.1-1ubuntu2_amd64 bug


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


       #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 inaccuracies 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 conversion.


       David Schleef <>

       Frank Mori Hess <>

       Herman Bruyninckx <>

       Bernd Porr <>

       Ian Abbott <>


       Copyright © 1998-2003 David Schleef
       Copyright © 2001-2003, 2005, 2008 Frank Mori Hess
       Copyright © 2002-2003 Herman Bruyninckx
       Copyright © 2012 Bernd Porr
       Copyright © 2012 Ian Abbott

       This document is part of Comedilib. In the context of this document, the term "source
       code" as defined by the license is interpreted as the XML source.

       This library is free software; you can redistribute it and/or modify it under the terms of
       the GNU Lesser General Public License as published by the Free Software Foundation,
       version 2.1 of the License.

       This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
       without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
       See the GNU Lesser General Public License for more details.

       You should have received a copy of the GNU Lesser General Public License along with this
       library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
       Boston, MA 02111-1307 USA.