LabVIEW equivalent of DAQmxRegisterEveryNSamplesEvent

[digital71]

Hello,

I am trying to translate a LabWindows/CVI program to LabView, but I've hit a snag in my development.  The way the CVI program works is it starts running a continuous waveform with regeneration disabled and registers a buffer generation and writing function to DAQmxRegisterEveryNSamplesEvent.  This makes the code responsive to the signal voltage controls on the front panel.  I've searched the LabView DAQmx functions but I can't find it anywhere.  Is there such a function in LabView, or am I looking at putting an event handler on a separate thread and calling the function manually?  Thank you for your time and please have a nice day.

Surge

[rpursley8]

Attached is a LV 2017 Example using an event structure to do what I think you are talking about.

[digital71]

Hello rpursley8,

I am running LabView 2015, could you save your VI in a way that will make it compatable with my version?  Thank you very much for your time.

Surge

[rpursley8 · Accepted solution]

Try this

[digital71]

Randall,

That's a pretty solid solution, thank you.  That's essentially what I ended up doing, except I generated the sine wave once and multiplied it by the amplitude because I figure FP multiplication is cheaper computationally than computing sine, and I put this entire loop on a separate thread so I could output a waveform and read simultaneously in another part of the program.  My experiments run for a long time (up to 24 hours) and this allowed me to keep the UI responsive while the experiment runs in the background.  Attached is what I did in case you're curious.  Thank you very  much for your time.

Surge

[JÞB]

Of course you could just drop the whole darn thing off the DAQmx Events palate.  

but Backsaving from 2017 is an option too

[rpursley8]

That is not very useful in that form for me.  I keep a snippet with the while loop and the DAQmx vis that I usually use included.