Digilent WaveForms User Manual

Page 29

WaveForms™ SDK Reference Manual

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Page 29 of 85

FDwfAnalogInTriggerChannelGet(HDWF hdwf,

int

*pidxChannel)

Parameters:
-

hdwf – Interface handle.

pidxChannel – Variable to receive the current trigger channel index.

The function above is used to retrieve the current trigger channel index.

FDwfAnalogInTriggerFilterInfo(HDWF hdwf,

int *

pfsfilter)

Parameters:
-

hdwf – Interface handle.

pfsFilter – Variable to receive the supported trigger filters.

The function above returns the supported trigger filters. They are returned (by reference) as a bit field. This bit
field can be parsed using the IsBitSet Macro. Individual bits are defined using the FILTER constants in DWF.h.
Select trigger detector sample source, FILTER:



filterDecimate: Looks for trigger in each ADC conversion, can detect glitches.



filterAverage: Looks for trigger only in average of N samples, given by FDwfAnalogInFrequencySet.

FDwfAnalogInTriggerFilterSet(HDWF hdwf, FILTER filter)

Parameters:

hdwf – Interface handle.

filter – Trigger filter to set.

The function above is used to set the trigger filter.

FDwfAnalogInTriggerFilterGet(HDWF hdwf, FILTER *pfilter)

Parameters:
-

hdwf – Interface handle.

pfilter – Variable to receive the current trigger filter.

The function above is used to get the trigger filter.