Digilent WaveForms Instrukcja Użytkownika Pobierz pdf (Strona 44)

WaveForms™ SDK Reference Manual

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Page 44 of 85

FDwfAnalogOutNodePhaseGet(HDWF hdwf, int idxChannel, AnalogOutNode node,

double *pdegreePhase)

Parameters:

- hdwf – Open interface handle on a device.

- idxChannel – Channel index.

- node – Node index.

- pdegreePhase – Pointer to variable to receive Phase value (in degrees).

The function above is used to get the current phase for the specified channel-node on the instrument.

FDwfAnalogOutNodeDataInfo(HDWF hdwf, int idxChannel, AnalogOutNode node,

int *pnSamplesMin, double *pnSamplesMax)

Parameters:

- hdwf – Open interface handle on a device.

- idxChannel – Channel index.

- node – Node index.

- pnSamplesMin - Minimum number of samples available for custom data.

- pnSamplesMax – Maximum number of samples available for custom data.

The function above is used to retrieve the minimum and maximum number of samples allowed for custom data

generation.

FDwfAnalogOutNodeDataSet(

HDWF hdwf, int idxChannel, AnalogOutNode node, double *rgdData, int cdData)

Parameters:

- hdwf – Open interface handle on a device.

- idxChannel – Channel index.

- node – Node index.

- rgbData – Buffer of samples to set.

- cData – Number of samples to set in rgbData.

The function above is used to set the custom data or to prefill the buffer with play samples. The samples are

double precision floating point values (rgdData) normalized to ±1.

With the custom function option, the data samples (cdData) will be interpolated to the device buffer size. The

output value will be Offset + Sample*Amplitude, for instance:

- 0 value sample will output: Offset.

- +1 value sample will output: Offset + Amplitude.

- -1 value sample will output: Offset – Amplitude.

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Digilent WaveForms Instrukcja Użytkownika Strona 44