NAME

       comedi_get_hardcal_converter - get converter for hardware-calibrated subdevice

SYNOPSIS

       #include <comedilib.h>

       int comedi_get_hardcal_converter(comedi_t * device, unsigned subdevice, unsigned channel, unsigned range,
                                        enum comedi_conversion_direction direction,
                                        comedi_polynomial_t * converter);

STATUS

       alpha

DESCRIPTION

       The function comedi_get_hardcal_converter initializes the comedi_polynomial_t pointed to by converter so
       it can be passed to either comedi_to_physical, or comedi_from_physical. The result can be used to convert
       data from the specified subdevice, channel, and range. The direction parameter specifies whether
       converter will be passed to comedi_to_physical or comedi_from_physical.

       This function initializes the comedi_polynomial_t pointed to by converter as a simple linear function
       with no calibration information, appropriate for boards which do their gain/offset/nonlinearity
       corrections in hardware. If your board needs calibration to be performed in software by the host
       computer, use comedi_get_softcal_converter instead. A subdevice will advertise the fact that it depends
       on a software calibration with the SDF_SOFT_CALIBRATED subdevice flag.

       The result of this function will only depend on the channel parameter if either
       comedi_range_is_chan_specific or comedi_maxdata_is_chan_specific returns true for the specified
       subdevice.

RETURN VALUE

       Returns 0 on success, -1 on failure.

AUTHORS

       David Schleef <ds@schleef.org>
           Author.

       Frank Mori Hess <fmhess@users.sourceforge.net>
           Author.

       Herman Bruyninckx <Herman.Bruyninckx@mech.kuleuven.ac.be>
           Author.

       Bernd Porr <tech@linux-usb-daq.co.uk>
           Author.

       Ian Abbott <abbotti@mev.co.uk>
           Author.

       Éric Piel <piel@delmic.com>
           Author.

COPYRIGHT

       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
       Copyright © 2012, 2015 Éric Piel

       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.

Comedi                                             03/17/2022                            COMEDI_GET_HARDCAL_C(3)