Advanced LabVIEW tutorials

Hello,
I just have a fairly simple question. I'm looking for some more advanced LabVIEW tutorials. All the tutorials I can find talk about basic structures, indexed addressing, math functions, and all of the general basics of LabVIEW, but I know that stuff and want to learn more about using some of the more advanced features. For instance, property and invoke nodes, variables, working with graphics and things like that. If anyone can recommend some good sources for advanced tutorials I'd greatly appreciate it.
BretD

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Advanced LabVIEW Instrument Driver Development Techniques

Hi, reading AN006-Developing a LabVIEW™
Instrument Driver and in page 2 I find:
"refer to the Advanced LabVIEW Instrument Driver Development Techniques application note."
I can not find this AN. Is the name correct ?
Bye
Luca

Hi Luca,
the link you're looking for should be this:
http://zone.ni.com/devzone/conceptd.nsf/2d17d611efb58b22862567a9006ffe76/e7a1635c2166e0728625680a005b0b9a?OpenDocument
Happy new year,
Alberto

Any advanced video tutorials for garageband?

I'm suprised I didn't find this topic in this forum but does anyone know where we can find some garageband tutorials that explain beyond the apple sites basics? Like proper mixing, recording, editing techniques. How to install stuff to use on garageband, perhaps even a video on setting up your mixer properly to get it to work properly with garageband.
Anything along those lines would be so helpful.
Thanks.

I think the problem here is the people that may have used Video tutorials don't need to be here asking questions. And then there are some of us here just to help answer questions. And then people that are looking for a quick answer.
I think your best bet is Google. But if you have any specific questions don't hesitate to ask. Good answers almost no waiting.

Exit labview (executables) after using large text files

Hello,
I am using LabView 6.0 and his aplication builder / runtime engine. I wrote some VI`s to convert large Tab delimited textfiles (up to 50 mb). When I am finished with the file it is staying in the memory somehow and is staggered with other (text)files in such a way the computer is slowing down.
When I want to exit the VI (program) it will take a very long time to get lost of the program (resetting LabView) and get my speed back.
How kan I solve this problem for these large files?
Martin.

OK, this may be a bit of a problem to track down, but let's start.
First, while your front panel looks great, your code is very hard to read. Overlapping elements, multiple nested structures and a liberal use of locals make this a problem. My first suggestion would be to with a massive cleanup operation. Make more room, make wires straight, make sure things are going left-to-right, make subVIs, place some documentation and so on. You won't believe the difference this makes.
After you did that, we can turn to find the problems. Some likely suspects are the local variables and the array functions. You use many local variables and perform resizing operations which are certain to generate copies. If you do this on arrays with dozens of MBs of data, this looks like the most likely source of the problem. Some suggestions to deal with this - if you have repeating code, make subVIs or move the code outside of the structures, so that it only has to be run once. Also, you seem to have some redundant code. For instance, you open the file only to see if you get an error. You should be able to do this with the VIs in the advanced palette without opening it (and you won't need to close it, either). Another example - you check the exit conditions in many places in your code. If your loop runs fast enough, there is no need for it. Some more suggestions - use shift registers instead of locals and avoid setting the same properties over and over again in the loop.
After you do these, it will probably be much easier to find the problem.
To learn more about LabVIEW, I suggest you try searching this site and google for LabVIEW tutorials. Here and here are a couple you can start with. You can also contact your local NI office and join one of their courses.
In addition, I suggest you read the LabVIEW style guide and the LabVIEW user manual (Help>>Search the LabVIEW Bookshelf).
And one last thing - having the VI run automatically and then use the Quit VI at the end is not very nice. Since you are building it, it will run automatically on its own and you can use the Application>>Kind property to quit only if it's an executable.
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Is there a way to dynamically allocate memory in labview?

In the C programming language, there are malloc() and free() functions which, combined with pointers, allow the user application to dynamically allocate memory.

LabVIEW does all of its memory management completely automatically, which is almost always an extermely good thing, and you don't have any real way of controlling it. Normally, memory is reused throughout the application and deallocated when the top level VI is closed. You can use the deallocate VI (in the Advanced pallete) to force a deallocation, but this will only help if you finished with the subVI.
The new version 8.0 also includes an option to decide when a subVI will be loaded into memory, which can also help. Normally, real memory problems in LV only occur when you have very large structures because LV needs a contiguous block of memory to hold its data. For most cases, there are various solutions available.
Do you have any specific problems?
To learn more about LabVIEW, I suggest you try searching this site and google for LabVIEW tutorials. Here and here are a couple you can start with. You can also contact your local NI office and join one of their courses.
In addition, I suggest you read the LabVIEW style guide and the LabVIEW user manual (Help>>Search the LabVIEW Bookshelf).
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Advanced File Functions

Hello all,
I have a subVI that deletes 5 files which should always be present on my desktop due to a run before. However, I have to put in a fail-safe that skips the delete process if the files are for some reason missing.
Attached is the simple file path constant and Delete file directory process that I currently use.
Is there any way I can utilize any of the other Advanced File Functions with a Case Structure and other Boolean Functions that can detect whether or not the files are there and then delete them if they are, or just skip the delete process if the files are not there.
Thanks
Attachments:
Delete Files.vi ‏16 KB

The Delete VI will skip the process on its own. The simplest thing to do is to call it and ignore the error (for example by using the Clear Errors VI). Just make sure not to wire an error into it if you do this, because you will then clear that error.
As for some other tips regarding this VIs -
Using constant paths is often a bad thing, especially if your are going to build the code into an executable and\or move it to another computer. Getting the path to the desktop is done in Windows through a special function which you can call by using the Call Library Function node, or you can hold the base path in a global.
I suggest that unless absolutely necessary, you should not save your files to the desktop, but to another folder.
You should create error in and out terminals, so that you can control when the VI runs.
Giving it a less generic name is also a good idea, because LV can not hold 2 VIs with the same name in memory.
To learn more about LabVIEW, I suggest you try searching this site and google for LabVIEW tutorials. Here, here, here, here and here are a few you can start with and here are some tutorial videos. You can also contact your local NI office and join one of their courses.
In addition, I suggest you read the LabVIEW style guide and the LabVIEW user manual (Help>>Search the LabVIEW Bookshelf).
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Insérer du code C dans un VI LabView

Bonjour à tous,
Je voulais savoir comment faire pour intégrer un bout de code en C dans un VI Labview, comme une sorte de bloc auquels on définit ses entrées et ses sorties qui sont relié à du code Labview ?
Je sais qu'il y a la possibilité d'appeller une DLL qui contiendrai le code, mais je voulais savoir si il existe un autre moyen ?
Cordialement
Nathan
Résolu !
Accéder à la solution.

I don't know French, so I'll be using English.
Beginning with LV 2010 CINs are stated as unsupported and all related tools are removed from LabVIEW installations. But if you strongly need you still may integrate CINs in LV and they will work. All you need is CIN menu palette icon (or VI with CIN on block diagram), CIN toolchain for *.lsb resource translation and adequate C/C++ compiler such as MS Visual Studio.
First and second thing can be obtained from older LV versions or from these boards. Third thing you should install on your own. Some specific adjustments must be made to the compiler to get output *.lsb file, which later should be loaded in Code Interface Node. Please, look at these manuals: 1, 2, 3, 4. Also read carefully Code Interface Reference Manual and Using External Code In LabVIEW tutorials. These have many subjects on DLL/CIN usage and it's well explained. Here's one more document: LabVIEW Advanced Course, which has some additional examples.
Keep in mind, that CINs are platform dependent and need to be recompiled when migrating to another platforms. Also last cintools do not support 64-bit platforms so you cannot create *.lsb file to run it on LabVIEW x64 (but there is one workaround for it though).
Pièces jointes :
CIN.zip ‏3 KB

Opinions on Labview books....

I'm a newbie at Labview and I'm looking at purchasing a couple of books:
Learning with LabVIEW 6i, 2nd Edition, Robert H. Bishop
OR
LabVIEW Advanced Programming Techniques by Rick Bitter
Does anyone have any comments on either of these?
I am looking for a good beginners reference and also a more advanced book
which covers initial design techniques and how to structure larger
applications.
Nick

On Wed, 16 May 2001 12:55:35 +1000, "Nick Ford"
wrote:
>I'm a newbie at Labview and I'm looking at purchasing a couple of books:
>Learning with LabVIEW 6i, 2nd Edition, Robert H. Bishop
I used the 1st edition to learn LabVIEW. If you can get the version with the
Student Edition of LabVIEW you can teach yourself LabVIEW very easily. Highly
recommended particularly for learning.
I also like "Advanced LabVIEW labs" by John Esseck. This covers an awful lot
of the minutiae that is left undiscussed in Bishop's book.
>OR
>LabVIEW Advanced Programming Techniques by Rick Bitter
This isn't so much a how to book, but a how would it be done. I probably
would advise against it. You certainly aren't going to learn to program in
LabVIEW from this book.
>
>Does anyone have any comments on either of these?
>I am looking for a good beginners reference and also a more advanced book
>which covers initial design techniques and how to structure larger
>applications.
As Joe suggests, Gary Johnson's books are generally good. I like "LabVIEW
Graphical Programming, Practical Applications in Instrumentation and Control"
is good, but I like Power Programming even better. Lot's of HIGH POWER
applications and examples. Mr. Johnson's books are definitely not tutorials
however. Once you have your basic skill set down his books are very good at
taking you to the next step.
Don't overlook NI's LabVIEW manuals available at
ftp.ni.com/support/labview/manuals
You will probably wear out your printer, but the users manual (P/N 320999C-01)
and the measurements manual (P/N 322661A-01) are really good places to start.
>
>Nick
>
>
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Christopher Dubea Phone: (985) 847-2280
Vice President of Engineering Fax: (985) 847-2282
Moving Parts L.L.C. email: [email protected]
P. O. Box 6117 URL: http://www.movingpart.com
Slidell, LA 70469-6117

I keep getting an error trying to open labview 7.1, and I am really confused. screen shot and log included

Hello,
For some reason, recently I have been getting problems trying to run labview. It all started when I upgraded from labview 6 to labview 7.1. I even went as far as to re-image a brand new machine with XP and start over again. I'm still getting issues. What do you think? Can a virus cause problems like this?
Thanks for your help, I really appreciate it
Attachments:
error_labview_7_1.JPG ‏13 KB
4f9d_appcompat.txt ‏27 KB

Hello!
Sorry to hear you are experiencing problems with
LabVIEW. This error dialogue is a result
of some error causing Windows to shut LabVIEW down. This is a little different than an internal
LabVIEW error which usually results in an error message with a .cpp file/line
number. I don’t really know how to
decode the MS error log file, but what I see it looks like you are doing quite
a bit of complicated programming. I see references
to quite a lot of the more advanced LabVIEW programming items (such as dlls, mathscript,
images, and storage). I highly suspect
that the crashes are occurring somewhere in external code, but without more
info on your program it could be hard for me to diagnose. Could you provide us with a little more
information about your application? Also,
it would be great for troubleshooting if you could reduce the crashing VI as
much as possible so that we can see exactly _where_ the crash is occurring. This could shed a lot of light on the
problem.
Also, if you are doing some mathscript stuff, don’t forget
to check out: http://digital.ni.com/public.nsf/websearch/4475BC3CEB062C9586256D750058F14B?OpenDocument
in case any of this pertains to your system.
Thanks for posting to the NI Discussion Forums! Please let me know how it all goes-
Travis M
LabVIEW R&D
National Instruments

Multiplatform sound IO with LabVIEW

We develop a commercial piece of software in LabVIEW which needs to do extensive sound output and input (professional internal and external soundcards, up to 16 channels, numerous bit depths and sampling rates with low latencies). This software is around 16 years old and when the project began there was not much in the way of standard libraries for sound I/O so we wrote a custom dll for doing windows API calls that we call from LabVIEW.
However, we are now interested in porting our software to Mac, Windows-64, and also supporting a pro-audio driver format (ASIO) in addition to the standard Windows WDM/MME drivers (in fact, we have already implemented a somewhat buggy interface for ASIO).
We would like to find a single technology that we could drop into our LabVIEW application to access soundcards on Win-32, Win-64, and Mac, additionally, if it supports ASIO on Windows that would be great.
The obvious and easiest place to look is the the built in LabVIEW VI's for doing Sound I/O, but, in talking with another company doing similar work, it appears that those VI's don't work nearly well enough (at least on Mac) for our needs.
A LabVIEW Mac user wrote to us:
"There are two sets of VI's for sound management in labview for Mac
- an old one, pretty limited but working, we are limited to 2 channels in and 2 out
- A new one which is supposed to give access to more parameters (choice of the sound input /output), better resolution ...) but unfortunately ... it doesn't work since few years ! External sound cards are not recognized and informations about the input and output are wrong
-I had some mail discussion last year for this bugs in LV 2010 with somebody of NI, and they are aware of the problem."
So, we are interested in finding a crossplatform sound I/O framework that could be called directly from LabVIEW, allowing us to create a cross platform, multichannel, multisoundcard, multisampling rate, LabVIEW sound interface.
Does anyone know of such a framework? In doing a little research I came accross a few, but I have no experience with them and whether they would fullfill our needs and could be utilized directly from LabVIEW without having to create wrappers for each target. Anyone have more perspective?
PortAudio appears to be an audio library designed for software that needs to be ported http://www.portaudio.com/
Fmod appears to be a commercial cross-platform API for sound: http://www.fmod.org/index.php/products
OpenAL is basically the sound version of OpenGL http://connect.creativelabs.com/openal/default.aspx

Anthony F wrote:
Thomas,
I would suggest the Sound and Vibration toolkit for advanced LabVIEW sound generation and analysis. You can find more information about this toolkit here:
http://sine.ni.com/nips/cds/view/p/lang/en/nid/12152
You may additionally need data acquisition hardware as I don't beleive this toolkit would readily interface with the external sound cards you are using.
And how would that solve any problem. The OP want to use a soundcard. So besides purchasing an expensive toolkit really NOT needed. The original poster will also be forced to purchase NI hardware what works very well. But are in high end then it comes to price range. You have not so many posting. So I guess you are quite new in the NI system. And I also know that in NI training. They are very focused on selling products. And for that I can not blame NI. They need to sell in order to develop So my advice to you. Spend some more time understanding what your customers REALLY need. Before recommending expensive hardware/software. A too eager sale strategy. Will backfire badly (rather) sooner or later.
Besides which, my opinion is that Express VIs Carthage must be destroyed deleted
(Sorry no Labview "brag list" so far)

Free LabVIEW Basics and Introduction Courses Removed, Moved or Missing?

There use to be some very nice FREE Labview tutorials under: http://sine.ni.com/nips/cds/view/p/lang/en/nid/10647
Use to be a area called, NI Training / Tutorials
Free training materials:
Online LabVIEW Basics
LabVIEW Introduction Course - Three Hours
LabVIEW Introduction Course - Six Hours
Does anyone know where these went?
-SS
Solved!
Go to Solution.

So the corrected links are:
Online LabVIEW Basics
LabVIEW Introduction Course - Three Hours
LabVIEW Introduction Course - Six Hours
-SS

Can FLASH program be pasted on Labview

Hi everyone,
Newbie here, I would like to know whether a Flash program can be pasted on a Labview program, just like the Flash program can be pasted on the Dreamweaver.
Thank you all.
Regards,
Tay

Probably not as easily since (if I remember correctly) both Dreamweaver and Flash are from Macromedia and since Dreamweaver is designed to do this kind of thing and LV isn't.
What you can do is integrate ActiveX controls into your front panel and interact with these controls using invoke nodes and property nodes. Place an ActiveX container (in the containers palette) and right click it to insert a flash object (on my system I see 2 objects called "Shockwave ...."). You will then need to wire the reference into the nodes on the diagram to get the various properties and methods. If you can find the documentation for the ActiveX interface somewhere then you should probably be all right, but just consider the following:
LV is multiplatform and ActiveX is windows only. LV doesn't always work too well with AX.
You have to have the ActiveX object installed on every computer where this will run (and it needs to be the same version).
Getting the data from the object could be tricky.
If all this doesn't work, you could try using an Internet Explorer ActiveX object and just load the flash file into an HTML page.
To learn more about LabVIEW, I suggest you try searching this site and google for LabVIEW tutorials. Here and here are a couple you can start with. You can also contact your local NI office and join one of their courses.
In addition, I suggest you read the LabVIEW style guide and the LabVIEW user manual (Help>>Search the LabVIEW Bookshelf).
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Multi-Threading in Labview (not teststand)

I have heard that it is possible to write a Labview application using
more than one execution thread, but I don't understand what the help
files are saying.
Do I have to have a HyperThreading CPU to do this?
This was easy in CVI.
Can more than one thread make changes to the front panel controls or even display it's own panel?
Maybe someone has some pointers or simple examples of how to create a second thread.
(Please - no TestStand examples. Just 100% Labview)

You don't need hyperthreading. Parallelism is built into LV in several levels. First of all, you can simply have parallel code by having 2 pieces of unconnected code which will run "in parallel" (the scheduler will make sure they both get executed).
You can assign priorities and threads to VIs by going to File>>VI Properties>>Execution, but there is usually no need to deal with this because is LV will be fast enough without this (plus, you have to know what you're doing).
Like I said earlier, if you just want different pieces of code to execute in parallel, just make sure they are not connected. You can open as many VIs as you like like this and let them execute in parallel. You can have seperate loops updating controls on the same front panel. Basically, whatever you like. It's really very simple. If you want an example, simply create 2 while loops which do something, and you can see they do it the same time.
To learn more about LabVIEW, I suggest you try searching this site and google for LabVIEW tutorials. Here and here are a couple you can start with. You can also contact your local NI office and join one of their courses.
In addition, I suggest you read the LabVIEW style guide and the LabVIEW user manual (Help>>Search the LabVIEW Bookshelf).
Try to take over the world!

LabVIEW positions at Pune

Jambhekar Automation Solutions is looking for 1-2Yr experienced LabVIEW engineers as well as freshers Trainee LabVIEW engineers
LabVIEW Engineer
Should have 1-2 Yrs of LabVIEW experience
Should have hands on experience on DAQ, serial, tcp, modbus etc.
Should be well versed with programming architecures and advanced LabVIEW concepts
Vision development experience will be an added advantage
CLAD/CLD certification will be an added advantage
If you are applying for this position please set subject of email as "Application for the post of LabVIEW Engineer"
Trainee LabVIEW Engineer
Should have BE/M.Sc. in electronics/instrumentetion streams
Should be aware of basics of LabVIEW programming
If you are applying for this position please set subject of email as
"Application for the post of Trainee LabVIEW Engineer"
Please send your resumes to [email protected]
Tushar Jambhekar
[email protected]
Jambhekar Automation Solutions
LabVIEW Consultancy, LabVIEW Training
Rent a LabVIEW Developer, My Blog

Hello sir
I Priyanka Kore have completed BE(Electronics and telecommunication) in 2013 and I am working as a Project fellow in CSIR - National Chemical Laboratory(NCL). I have 8 months experience of working on LABVIEW software.
I have attached my resume.
Regards
Priyanka Kore.
Attachments:
Resume- Priyanka Kore.docx ‏20 KB

How to use Labview 7.0 to make program interface?

Hellow!
Will Labview 7.0 be able to make the program interface? just like some application software made by VC++,VB?
The program interface should have the menu,button,...
Thanks!

You can use LV to create a fully working program with an interface of your design, just like you would in any other compiler. LV actually serves as a compiler for a graphical language called G, which is based on dataflow instead of text based execution (the data "flows" through wires from one function to the next, controlling execution order and filling the role of variables).
Since LV is multiplatform (and not MS), its default controls are not identical to those in VC and VB, but those can be accessed to. Actually, in many ways, it's much easier to build an interface in LV, because building the interface actually defines your "variables" and your interaction with the code.
An interface would be no good without a program, so you will have to know how to use LV. It's much faster to learn than other languages, but you will still need some experience to write good programs.
To learn more, I suggest you start by reading the LabVIEW user manual. Also, try searching this site and google for LabVIEW tutorials. Here and here are a couple you can start with. You can also contact your local NI office and join one of their courses.
In addition, I suggest you read the LabVIEW style guide.
If your question was only about MS buttons, like in VB and VC, you can find them in the Dialog Controls palette, or you can use ActiveX to embed them into your program.
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Advanced LabVIEW tutorials

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