Blackfin Multi-Threaded Applications with Events

[JoeC]

Has anyone else seen this discrepancy with the BF548?  I can write code that uses a single while loop and an event structure, and the code performs as expected.  When I add a second loop to the code (i.e. similar to the producer/consumer architecture), the event loop stops being event driven and just runs all the time.

I have attached the VI that is performing discrepantly  I have tried timed while loops, and normal while loops as well as shared variables and globals for stop communications between the two loops.

[Mathan]

He opened the same topic in LabVIEW Embedded Board

[Claire_Reid]

Hi JoeC,

I have tested this with another applications engineer, and we are not even able to run a VI on our BlacKFin when it has an event structure in it. We have escalated this to R&D. One question: what version of LabVIEW are you running?

Regards,

Claire

[JoeC]

LV 2009.  Also, I can email you my project with build spec.  I don't want to post the project file in the forum as it contains IP address information.

[Claire_Reid]

Hi JoeC,

Can you send me the code that you tested that showed the behavior you were expecting...with the one loop. We were not even able to get that to work the way you were hoping.

Regards,

Claire

[Claire_Reid]

Hi JoeC,

If you still wish to troubleshoot this issue please provide us with the VI that shows the behavior you are wanting.

Thanks

Claire

[JoeC]

I apologize for the delay.  Here is a code snipet along with the compiled code.

[Will_S.]

Hi Joe,

I was able to reproduce the issue you have described. We're currently investigating it further.

[Claire_Reid]

Hi Joe,

I am having some issues with our BlackFin. Once I am able to create a good and bad test for R&D I will escalate to them.

Thanks

Claire

[Claire_Reid]

Hey JoeC:

I have narrowed it down to the following:

1. Run on BF 548: With while loop: loop interation changes only when toggle
is pressed

2. Run on BF 548: With timed loop: loop interation continuously increases

I will escalate this to R&D

Regards

Claire