DAQmxErrChk and Regeneration

[masterron1]

Hello,

I wished to inquire about the DAQmxErrChk function. What is it used for and how can it be used to control regeneration? I have observed the following syntax:

DAQmxErrChk (DAQmxSetWriteAttribute (genTaskHandle, DAQmx_Write_RegenMode, DAQmx_Val_DoNotAllowRegen));

Provided I rename genTaskHandle to my own task name (nitWFM), whould there be anything I would need to do to set DoNotAllowRegeneration? Does it matter how I define the task? Where I observed this code there was the following for task definition:

DAQmxErrChk (DAQmxCreateTask("",&genTaskHandle));

DAQmxErrChk (DAQmxCreateAOVoltageChan (genTaskHandle, channels, "", -10.0, 10.0, DAQmx_Val_Volts, NULL));
DAQmxErrChk (DAQmxCfgSampClkTiming (genTaskHandle, "", rate, DAQmx_Val_Rising, DAQmx_Val_ContSamps,
                                        SAMPLESNB));

In my code the task is defined as such:

std::auto_ptr<CNiDAQmxTask> nitWFM;
nitWFM = std::auto_ptr<CNiDAQmxTask>(new CNiDAQmxTask());

Would defining my task like this enable me to still change the Regenation via the above line?

[charris · Accepted solution]

masterron1:

The DAQmxErrChk function is used to check the status code when calling DAQmx functions (see example here).

If you'd like to change the regeneration settings, there is a regeneration mode property you can set, called "DAQmxSetWriteRegenMode."

For more info on the regeneration properties, see the NI-DAQmx C Reference Help. You can get to it from your Start Menu in "Programs --> National Instruments --> NI-DAQ --> Text-Based Code Support."

Go to the search tab and enter "Regeneration" to get the full list of topics. The first result should have what you need.

Hope that helps!