comedi_from_physical(3) convert physical units to sample using calibration data


#include <comedilib.h>

lsampl_t comedi_from_physical(double data, const comedi_polynomial_t * conversion_polynomial);


Converts data given in physical units into Comedi's integer sample values (lsampl_t, between 0 and maxdata --- see comedi_get_maxdata). The conversion_polynomial parameter is obtained from either comedi_get_hardcal_converter or comedi_get_softcal_converter. The allows non linear and board specific correction. The result will be rounded using the C library's current rounding direction. No range checking of the input data is performed. It is up to you to ensure your data is within the limits of the output range you are using.


Comedi sample value corresponding to input physical value.


David Schleef <[email protected]>


Frank Mori Hess <[email protected]>


Herman Bruyninckx <[email protected]>


Bernd Porr <[email protected]>


Ian Abbott <[email protected]>


Éric Piel <[email protected]>



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 Éric Piel

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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.

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