Multi-threading with multiple while loops... trouble?

[parthabe]

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@Nickerbocker wrote:
Awesome.  Thanks for the tip.  I will look into those as I am a CPU% nazi 😛 and whatever I can do to lower that the better.

Just an aside: I love LabVIEW.  My company purchased for me the NI Developer Suite a little over a year ago and I've learned so much from using it.  Everytime I build something in LabVIEW it becomes increasingly simplified as I am exposed to more and more of the internal libraries and capabilites of LabVIEW.  I have a pretty extensive programming background: Visual Studio .NET, PHP/SQL for web pages, and C/Assembly for microcontrollers.  The other day in LabVIEW I wrote a program that consisted of a PID controller that controlled a heater band, a state machine to control a bunch of solenoids with complicated timing, and a data recorder that was taking in a plethora of transducer data and making state machine/PID controller decisions based on that data.  I was able to accomplish all of this with rather modest NI hardware and LabVIEW enabled me to get the program up and running from scratch in about 4 hours time.  I was telling my boss that with traditional programming languages on that particular setup we would have been in "beta testing" after about a week and a half of development.  Instead we were in production mode by the afternoon.  Worth every penny.

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Hi Nickerbocker,

Please go thro' the below link to know more of the Event Structures.

http://zone.ni.com/reference/en-XX/help/371361B-01/lvhowto/caveatsrecmndtnsevnts/

BTW, U had said that U could finish Ur entire programming stuff in <4 hrs for a PID control.

Can U pl post the code in LV 7.1 for me to go thro' it & learn ? I ve never got a chance to prog a PID controller...

[hecmar.arreola]

I used the PID VI's that come with the Fuzzy Logic Toolkit :/.  I can't take any real credit for developing the PID controller.... and who really has time for that anyway?  I've only done PID controllers using Op-Amps in labs back in school days and have never really done a software one though.

The ones in the Fuzzy Logic Toolkit work very well.  There is also a "Simple PID.vi" available on NI's website somewhere that will do the job.  I was wiring the output of the PID controller to some pulse width modulation code that I modified from an article on the NI website.

I'd post my code if you really want me to...however, it is a bit of a mess, and I'm not sure how much it would really help you 🙂

-nickerbocker

[Jeffrey_P]

Nickerbocker,

I was perusing the forums, and came across your post. 

Just an aside: I love LabVIEW.  My company purchased for me the NI Developer Suite a little over a year ago and I've learned so much from using it.  Everytime I build something in LabVIEW it becomes increasingly simplified as I am exposed to more and more of the internal libraries and capabilites of LabVIEW.  I have a pretty extensive programming background: Visual Studio .NET, PHP/SQL for web pages, and C/Assembly for microcontrollers.  The other day in LabVIEW I wrote a program that consisted of a PID controller that controlled a heater band, a state machine to control a bunch of solenoids with complicated timing, and a data recorder that was taking in a plethora of transducer data and making state machine/PID controller decisions based on that data.  I was able to accomplish all of this with rather modest NI hardware and LabVIEW enabled me to get the program up and running from scratch in about 4 hours time.  I was telling my boss that with traditional programming languages on that particular setup we would have been in "beta testing" after about a week and a half of development.  Instead we were in production mode by the afternoon.  Worth every penny.

I love reading about LabVIEW success stories and hearing from users how LabVIEW was able to simplify their job.  I would be very interested in setting up a follow-up with you regarding this information so that I could ask you a few follow-up questions.  I can get your contact info from the forums manager, so you don't have to post it, but I need to get your permission first. 

Would you be willing to talk with me regarding your experiences with LabVIEW?

Thanks,

Message Edited by Jeffrey P on 03-27-2007 09:38 AM