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>comedi_get_hardcal_converter</H1
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><H2
>Name</H2
>comedi_get_hardcal_converter -- get converter for hardware-calibrated subdevice</DIV
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>Synopsis</H2
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><PRE
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>#include <comedilib.h></PRE
><P
><CODE
><CODE
CLASS="FUNCDEF"
>int comedi_get_hardcal_converter</CODE
>(comedi_t *dev, unsigned subdevice, unsigned channel, unsigned range, enum comedi_conversion_direction direction, comedi_polynomial_t *converter);</CODE
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> Status
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> alpha
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><H2
> Description
</H2
><P
>comedi_get_hardcal_converter() initializes <CODE
CLASS="PARAMETER"
>converter</CODE
> 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 <CODE
CLASS="PARAMETER"
>subdevice</CODE
>,
<CODE
CLASS="PARAMETER"
>channel</CODE
>, and <CODE
CLASS="PARAMETER"
>range</CODE
>. The <CODE
CLASS="PARAMETER"
>direction</CODE
>
parameter specifies whether <CODE
CLASS="PARAMETER"
>converter</CODE
> will be passed to comedi_to_physical()
or comedi_from_physical().</P
><P
>This function initializes <CODE
CLASS="PARAMETER"
>converter</CODE
> 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.</P
><P
>The result of this function will only depend on the <CODE
CLASS="PARAMETER"
>channel</CODE
>
parameter if either comedi_range_is_chan_specific() or comedi_maxdata_is_chan_specific()
is true for the specified <CODE
CLASS="PARAMETER"
>subdevice</CODE
>.
</P
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><A
NAME="AEN6627"
></A
><H2
> Return value
</H2
><P
>Zero on success or -1 on failure.</P
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> </P
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