I am a LabVIEW programmer, so I could help you from a LabVIEW perspective. I believe you are looking for the Regeneration Mode property Node. Try to search for an example in C++ that explains non-regeneration. I have attached a LabVIEW block diagram from which you can replicate the API and try to run in your C++ application.
In the attached example, the application continuously outputs a waveform using an internal sample clock. The automatic regeneration of data has been disabled using the property node, so new data has to be provided throughout the duration of the continuous Analog Output operation. This allows the generation of any arbitrary frequency as this VI computes new data for each iteration of the loop, maintaining phase continuity of the signal.
Do Not Allow Regernation - Do not allow NI-DAQmx to regenerate samples the device previously generated.
When you choose this value, NI-DAQmx waits for you to write more samples to the
buffer or until the timeout expires.
Let us know if you have any questions.
