Digilent WaveForms Manuel d'utilisateur télécharger pdf (Page 61)

WaveForms™ SDK Reference Manual

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9.2 Configuration

FDwfDigitalInInternalClockInfo(HDWF hdwf, double *phzFreq)

Parameters:

- hdwf – Interface handle.

- phzFreq – Pointer to return the internal clock frequency.

The function above is used to retrieve the internal clock frequency.

FDwfDigitalInClockSourceInfo(HDWF hdwf, int *pfsDwfDigitalInClockSource)

Parameters:

- hdwf – Open interface handle on a device.

- pfsDwfDigitalInClockSource – Pointer to variable to return the available clock source options.

The function above returns the supported clock sources for Digital In instrument. 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

DwfDigitalInClockSource constants in dwf.h:

 DwfDigitalInClockSourceInternal: Internal clock.

 DwfDigitalInClockSourceExternal: External clock source.

FDwfDigitalInClockSourceSet(HDWF hdwf, DwfDigitalInClockSource v)

Parameters:

- hdwf – Open interface handle on a device.

- v – Clock source.

The function above is used to set the clock source of instrument.

FDwfDigitalInClockSourceGet(HDWF hdwf, DwfDigitalInClockSource *pv)

Parameters:

- hdwf – Open interface handle on a device.

- pv – Pointer to variable to return the configured value.

The function above is used to get the clock source of instrument.

FDwfDigitalInDividerInfo(HDWF hdwf, unsigned int *pdivMax)

Parameters:

- hdwf –Interface handle.

- pdivMax – Pointer to variable to return the available maximum divider value.

The function above returns the maximum supported clock divider value. This specifies the sample rate.

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Digilent WaveForms Manuel d'utilisateur Page 61