COMEDI_FROM_PHYS(3)						 Comedi reference					       COMEDI_FROM_PHYS(3)

NAME

       comedi_from_phys - convert physical units to sample

SYNOPSIS

       #include <comedilib.h>

       lsampl_t comedi_from_phys(double data, comedi_range * range, lsampl_t maxdata);

DESCRIPTION

       Converts parameter data given in physical units (double) into sample values (lsampl_t, between 0 and maxdata). The parameter range
       represents the conversion information to use, and the parameter maxdata represents the maximum possible data value for the channel that the
       data will be written to. The mapping between physical units and raw data is linear and assumes that the converter has ideal
       characteristics.

       Conversion is not affected by out-of-range behavior. Out-of-range data parameters are silently truncated to the range 0 to maxdata.

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.

COPYRIGHT

       Copyright (C) 1998-2003 David Schleef
       Copyright (C) 2001-2003, 2005, 2008 Frank Mori Hess
       Copyright (C) 2002-2003 Herman Bruyninckx
       Copyright (C) 2012 Bernd Porr
       Copyright (C) 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.

Comedi								    07/06/2012						       COMEDI_FROM_PHYS(3)