4 replies to this topic

[Chris Cartwright]

Hi folks,

Does anyone know of any example TestStand and Labview code that does something similar to the following...?

I'd like to start a vi in its own parallel thread from TestStand (which is working), and then at various places through my TestStand sequence, get data back from it via a queue. I've done this between 2 labview vi's on numerous occasions, but I can't seem to work out how TestStand and labview share the queue.

Any clues anyone?


Cheers,
ChrisC.

[Bob Y.]

Hi folks,

Does anyone know of any example TestStand and Labview code that does something similar to the following...?

I'd like to start a vi in its own parallel thread from TestStand (which is working), and then at various places through my TestStand sequence, get data back from it via a queue. I've done this between 2 labview vi's on numerous occasions, but I can't seem to work out how TestStand and labview share the queue.

Any clues anyone?
Cheers,
ChrisC.

Here is one way to do it (I think). You dynamically launch a VI; this VI will be your queue generator. You can then launch any VI via the sequence and the queue should be accessable. You will have to keep a reference to the dynamically launched VI in TestStand and be sure to kill it at the end of the sequence.

Be sure to let us know if it works .
Bob Young

[Chris Cartwright]

Thanks Bob,

Sure does, I've used this method to interchange data between vi's called from TestStand before, and it's really neat. It's a good way of implementing a "communications manager" (e.g. for serial comms to your device under test), where multiple vi's can talk to it.

What I was hoping to achieve was to pass data into TestStand directly from LabView without needing another vi by them using the same queue instance. Having done a bit more research, it can be done, although it seems a little more complex than first impressions suggest. Here's a link to something similar to what I was trying: http://forums.ni.com...y.id=7658#M5275

Thanks for the info, have sorted my problem through an alternative and simpler method....


Cheers,
ChrisC.

[ddeclue2]

QUOTE(Chris Cartwright @ Jun 8 2006, 07:28 AM)

Hi folks,

Does anyone know of any example TestStand and Labview code that does something similar to the following...?

I'd like to start a vi in its own parallel thread from TestStand (which is working), and then at various places through my TestStand sequence, get data back from it via a queue. I've done this between 2 labview vi's on numerous occasions, but I can't seem to work out how TestStand and labview share the queue.

Any clues anyone?


Cheers,
ChrisC.

You might possibly be having problems using a local queue between your TestView launched VI and the other VI. You should look at using remote queueing as described at openG.org.

It shouldn't be a problem to do what you are describing as I am doing something very similar now in my own project.

[Lars915]

My testing passes a lot of info between LV background processes and TestStand (Implementing custom communications protocols.) Using a communications manager works great, especially when the background processes run on remote machines.