threading - ni6515

[wigomogi]

Is it possible to call DAQmxWriteDigitalLines  in different threads for different lines? or will every call have to be thread locked?

DAQmxCreateTask ("", &DOCARD); 

DAQmxCreateDOChan (DOCARD, text, "",DAQmx_Val_ChanPerLine);

DAQmxStartTask(DOCARD);

DAQmxWriteDigitalLines (DOCARD, 1, 1, 10,
                                          DAQmx_Val_GroupByScanNumber,
                                          &DOArray[0],

 DAQmxStopTask(DOCARD)  ;
 DAQmxClearTask(DOCARD)  

[ebalci]

Hi,

I believe DAQmx library is already multi-thread safe.

But the code snippet you provided does not look optimal. Do not create/clear tasks too often.
I usually create once at the beginning of my application and clear when exiting. That works for most of the projects.

Even Start/stop is not required too often.

So, create your tasks during initalization. Start when test/process starts and then read/write when required in whichever thread.

does not that scenario work for you?