Viewing DAQmx buffer data during acquisition

[Chinook80]

Hi,

I am new to DAQmx and I have a question: I am current using reference triggering to start my data acquisition and I know that this function uses a circular buffer scheme.  Is there any way to poll the samples in the buffer while it is being continuously updated before the trigger is detected?

I would appreciate any suggestions and offer my thanks in advance.

CK

[Jeff_T.]

Hi CK,

There is one thing that I can think of that would allow us to view the buffers before a reference trigger occurs.  We could perform a continuous analog acquisition with a reference trigger.  I have included a link from ni.com that gives several example programs that show how to implement this.

NI-DAQmx Continuous Analog Input with Both Start and Reference (Stop) Triggers

Give this a look and let us know if this is what you are looking for or if you have any further questions.

Best Regards,

Jeff Tipps
Applications Engineer
National Instruments

[maurino]

hi,

i have the same problem: i must interrupt the acquisition at some value of data. what i do??? Please, help me. is very urgent 

[lab_boy]

Hey,

Check out these two documents online, Doc1 and Doc2. You would still need to modify then to fit your application.

Good Luck

-lab