COMEDI_GET_HARDCAL_CONVERTER(3)
NAME
comedi_get_hardcal_converter - get converter for hardware-calibrated
subdevice
SYNOPSIS
#include <comedilib.h> int comedi_get_hardcal_converter (comedi_t *dev, unsigned subdevice, unsigned channel, unsigned range, enum comedi_conversion_direction direction, comedi_polynomial_t *converter);
STATUS
alpha
DESCRIPTION
comedi_get_hardcal_converter() initializes converter so it can be
passed to either comedi_to_physical() or comedi_from_physical(). The
result can be used to convert data from the specified subdevice, channel, and range. The direction parameter specifies whether converter
will be passed to comedi_to_physical() or comedi_from_physical().
This function initializes converter as a simple linear function with no
calibration information, appropriate for boards which do their
gain/offset/nonlinearity corrections in hardware. If your board needs
calibration to be performed in software by the host computer, use
comedi_get_softcal_converter() instead. A subdevice will advertise the
fact that it depends on a software calibration with the SDF_SOFT_CALIBRATED subdevice flag.
The result of this function will only depend on the channel parameter if either comedi_range_is_chan_specific() or comedi_maxdata_is_chan_specific() is true for the specified subdevice.
RETURN VALUE
- Zero on success or -1 on failure.