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Comedi

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5.4.1.29 comedi_set_global_oor_behavior

comedi_set_global_oor_behavior — out-of-range behavior

Synopsis

#include <comedilib.h>

enum comedi_oor_behavior comedi_set_global_oor_behavior(enum comedi_oor_behavior behavior);

Description

This function changes the Comedilib out-of-range behavior. This currently affects the behavior of comedi_to_phys() when

converting endpoint sample values, that is, sample values equal to 0 or maxdata. If the out-of-range behavior is set to COMEDI-

_OOR_NAN, endpoint values are converted to NAN. If the out-of-range behavior is set to COMEDI_OOR_NUMBER, the endpoint

values are converted similarly to other values.

Return value

The previous out-of-range behavior is returned.

5.4.1.30 comedi_to_phys

comedi_to_phys — convert sample to physical units

Synopsis

#include <comedilib.h>

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

Description

Converts parameter data given in sample values (lsampl_t, between 0 and maxdata) into physical units (double). 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 was read. The mapping between physical units is linear and assumes ideal converter characteristics.

Conversion of endpoint sample values, that is, sample values equal to 0 or maxdata, is affected by the Comedilib out-of-range

behavior (see function comedi_set_global_oor_behavior>()). If the out-of-range behavior is set to COMEDI_OOR_-

NAN, endpoint values are converted to NAN. If the out-of-range behavior is set to COMEDI_OOR_NUMBER, the endpoint values

are converted similarly to other values.

If there is an error, NAN is returned.

5.4.1.31 comedi_to_physical

comedi_to_physical — convert sample to physical units using polynomials

Synopsis

#include <comedilib.h>

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

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