Finite sampling on each trigger

[anarkie]

Hello? I have some error problem regarding to DAQmxSetReadOffset(). 

Whenever I set this codes,

short* DataBuffer = new short[_countof(dbuffer)];
...
DAQmxErrChk (DAQmxCfgSampClkTiming(taskHandle,"",fRate,DAQmx_Val_Rising,DAQmx_Val_FiniteSamps,_countof(dbuffer) )); 
...

 I receive this error:

 

       
_countof(dbuffer) is a buffer size of data. I wish to acquire _countof(dbuffer) size sample.

I have tried this, but no use.

DAQmxErrChk (DAQmxGetReadAvailSampPerChan(taskHandle,&reading)); 

if(reading>_countof(dbuffer))
{
DAQmxErrChk(DAQmxSetReadRelativeTo(taskHandle,  DAQmx_Val_MostRecentSamp ));
DAQmxErrChk(DAQmxSetReadOffset(taskHandle, -(_countof(dbuffer)) ));
}

 

[anarkie · Accepted solution]

Ah,,,I have solved the problem. It was using while() condition, but it is causing that error.

The continuous sampling needs while() but in this case it doesn't need it.