Digilent WaveForms Manuel d'utilisateur télécharger pdf (Page 17)

WaveForms™ SDK Reference Manual

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Page 17 of 85

FDwfAnalogInStatusRecord(

HDWF hdwf, int *pcdDataAvailable, int *pcdDataLost, int *pcdDataCorrupt)

Parameters:

- hdwf – Interface handle.

- pcdDataAvailable – Pointer to variable to receive the available number of samples.

- pcdDataLost – Pointer to variable to receive the lost samples after the last check.

- pcdDataCorrupt – Pointer to variable to receive the number of samples that could be corrupt.

The function above is used to retrieve information about the recording process. The data loss occurs when the

device acquisition is faster than the read process to PC. In this case, the device recording buffer is filled and data

samples are overwritten. Corrupt samples indicate that the samples have been overwritten by the acquisition

process during the previous read. In this case, try optimizing the loop process for faster execution or reduce the

acquisition frequency or record length to be less than or equal to the device buffer size (record length <= buffer

size/frequency).

FDwfAnalogInRecordLengthSet(HDWF hdwf, double sLegth)

Parameters:

- hdwf – Interface handle.

- sLegth – Record length to set expressed in seconds.

The function above is used to set the Record length in seconds.

FDwfAnalogInRecordLengthGet(HDWF hdwf, double *psLegth)

Parameters:

- hdwf – Interface handle.

- sLegth – Pointer to variable to receive the record length.

The function above is used to get the current Record length in seconds.

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Digilent WaveForms Manuel d'utilisateur Page 17