Continuous digital train output with DAQmx

[Raymond Tsang]

Hi LAVAs,

I encountered some problems when I'm trying to generate digital pulse trains to drive an LED via a PCI-6250 card.

I want to implement it as two separate VIs: one starts pulsing the LED, the other stops it. (I tried to set "Continuous Samples" in DAQmx Timing.vi, but pulsing stops when the VI quits.)

What now I can do is to generate one pulse train per run of the VI. (Screenshot attached)

Any thoughts or suggestions?

Ray

[JamesP]

Suggestions:

-"DAQmx clear task" will stop the task from continuing when the VI is finished.

-Look in to the functionality of "DAQmx Create Task", specifically the "auto cleanup" input.

[Raymond Tsang]

QUOTE (JamesP @ Feb 19 2009, 07:05 AM)

Suggestions:

-"DAQmx clear task" will stop the task from continuing when the VI is finished.

-Look in to the functionality of "DAQmx Create Task", specifically the "auto cleanup" input.

Thanks for your suggestion, James!

I tried to remove "clear task" and added "create task" with "auto cleanup" disabled. However, after the VI ended, the LED pulsing stopped, and when I started it again, LabVIEW complained about "resource being reserved" or sth like that. I'll keep trying...

Ray