1COMEDI_TO_PHYS(3)              Comedi reference              COMEDI_TO_PHYS(3)
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NAME

6       comedi_to_phys - convert sample to physical units
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SYNOPSIS

9       #include <comedilib.h>
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11       double comedi_to_phys(lsampl_t data, comedi_range * range,
12                             lsampl_t maxdata);
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DESCRIPTION

15       Converts parameter data given in sample values (lsampl_t, between 0 and
16       maxdata) into physical units (double). The parameter range represents
17       the conversion information to use, and the parameter maxdata represents
18       the maximum possible data value for the channel that the data was read.
19       The mapping between physical units is linear and assumes ideal
20       converter characteristics.
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22       Conversion of endpoint sample values, that is, sample values equal to 0
23       or maxdata, is affected by the Comedilib out-of-range behavior (see
24       function comedi_set_global_oor_behavior). If the out-of-range behavior
25       is set to COMEDI_OOR_NAN, endpoint values are converted to NAN. If the
26       out-of-range behavior is set to COMEDI_OOR_NUMBER, the endpoint values
27       are converted similarly to other values.
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29       If there is an error, NAN is returned.
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AUTHORS

32       David Schleef <ds@schleef.org>
33           Author.
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35       Frank Mori Hess <fmhess@users.sourceforge.net>
36           Author.
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38       Herman Bruyninckx <Herman.Bruyninckx@mech.kuleuven.ac.be>
39           Author.
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41       Bernd Porr <tech@linux-usb-daq.co.uk>
42           Author.
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44       Ian Abbott <abbotti@mev.co.uk>
45           Author.
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47       Éric Piel <piel@delmic.com>
48           Author.
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51       Copyright © 1998-2003 David Schleef
52       Copyright © 2001-2003, 2005, 2008 Frank Mori Hess
53       Copyright © 2002-2003 Herman Bruyninckx
54       Copyright © 2012 Bernd Porr
55       Copyright © 2012 Ian Abbott
56       Copyright © 2012, 2015 Éric Piel
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58       This document is part of Comedilib. In the context of this document,
59       the term "source code" as defined by the license is interpreted as the
60       XML source.
61
62       This library is free software; you can redistribute it and/or modify it
63       under the terms of the GNU Lesser General Public License as published
64       by the Free Software Foundation, version 2.1 of the License.
65
66       This library is distributed in the hope that it will be useful, but
67       WITHOUT ANY WARRANTY; without even the implied warranty of
68       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
69       General Public License for more details.
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71       You should have received a copy of the GNU Lesser General Public
72       License along with this library; if not, write to the Free Software
73       Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
74       USA.
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79Comedi                            05/11/2017                 COMEDI_TO_PHYS(3)
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