comedi_to_physical man page

comedi_to_physical — convert sample to physical units


#include <comedilib.h>

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


Converts data given in Comedi's integer sample values (lsampl_t, between 0 and maxdata) into physical units (double).  The conversion_polynomial parameter is obtained from either comedi_get_hardcal_converter() or comedi_get_softcal_converter().  No range checking of the input data is performed.  It is up to you to check for data values of 0 or maxdata if you want to detect possibly out-of-range readings.

This function is intended to supplant comedi_to_phys(), and was introduced in order to support software calibrations.

Return Value

Physical value corresponding to the input sample value.


28 October 2007