How to interface LabVIEW to Matlab?

Hallo everyone,
I have a function written in Matlab that does some calculations, the final result which is a number should be sent to LabVIEW to do something else. I want to know what is the best method to do this, ActiveX, TCP/IP or something else. why do I need this? because both programms were developed apart from each other, but know should be connected and it would take more time to rewrite either one in another software.
Thanks in advance!

Ive tried but it doesnt help. My matlab code is extremely complicated its all about fuzzy logic stuff and the labview program communicates with a microcontroller to control a pump.
to make it simple, Ive 2 programms one in Labview and the other in Matlab, i want to give the inputs of the "matlab code" in LabVIEW, then matlab code works, then the result is delivered to Labview to do sth else. does anybody have any idea how to do this or is it even possible?
Attachments:
pic.jpg ‏34 KB

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Interface LabVIEW and matlab

Hello, I want to interface LabVIEW with MATLAB using TCP/IP for data transfer. Can anyone, please give me a step-by-step instruction to how to do this? Or else can you point out where I can get them? Thanks.
Solved!
Go to Solution.

Hi Sanchu,
As TCP/IP is such a generic protocol then you should be able to fairly easily build TCP/IP interfaces for both your LabVIEW and Matlab code and transfer data using ASCII, or variants etc depending on what sort of data you are trying to transfer. I'm not too familiar with Matlab, but on the LabVIEW end there are some very good TCP/IP server and client examples that ship with LabVIEW.
Another option that you may want to consider, and the reason I'm answering this is that I've recently done a project whereby we took some legacy Matlab code which we wanted to transpose into LabVIEW so that we could then fully automate a test system we have using TestStand. Much of it we were able to derive LabVIEW equivalent functions, but for some functions where LabVIEW didn't appear to have a suitable equivalent, or where it was simply more efficient, we simply copy and pasted the Matlab code into either in the first instance MathScript nodes (not dependant on Matlab) or Matlab script nodes (which will hopefully return to at a future date to fully transpose over to LabVIEW so that we are no longer dependant on a Matlab licence).
In both instances the relative ease of doing this was very impressive, and we were able to wrap huge amounts of Matlab code within LabVIEW with very few issues. As an idea, have you considered wrapping your Matlab functionality in this way and then keeping all the TCP/IP client and server comms within LabVIEW?
N.B. if you haven't found it search the palette for 'Matlab Script'
Best of luck,
David
David Clark
CLA | CTA
CLA Design Ltd
Hampshire, England

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can anyone tell me how to interface labview 8.5 with spectrum analyzer.............i am beginner ...i don't know much about labview
Solved!
Go to Solution.

Why don't you tell us what you do know so we can better help you out? Do you know how to hook up the spectrum analyzer? Make/model of the spectrum analyzer? Do you know how to use it manually? Do you know what a spectrum analyzer is for?
I know some of these questions might sound almost insulting, but we have to establish a baseline so we know how much help you need, and how much detail to include.
Bill
(Mid-Level minion.)
My support system ensures that I don't look totally incompetent.
Proud to say that I've progressed beyond knowing just enough to be dangerous. I now know enough to know that I have no clue about anything at all.

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Sir
We were able to solve that problem...but now could you advice as to which DC power supply we should use (preferably avalable in India) so that it can be controlled by Labview (through a gpib/rs232/any other port) to give a square wave of desired frequency/other parameters.
Regards
Shivam

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Hi,
I use Matlab-Code in Labview and it's don't need create a dll. The LV was a tool, matlab script, you can write your code Matlab here. see the examples of LV.I think the lV 6.1 have.
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I recommend having a wrapper created around the matlab dll that converts the datatypes for you. There is a lot of fooling around with pointers involved which is very difficult in LabVIEW. btw, this got much more complicated after Matlab 7. Essentially, you need to convert your inputs into mxArrays, and then add those mxArrays to an mxArray list that you pass by pointer into the matlab dll. You also need to create a mxArray list for the outputs from the dll which you will need to extract your data out of before converting it back into a LabVIEW supported datatype. It's a big hassle. We do this pretty often, but we have created a c library that handles all the conversions, so it is feasible for us. Unfortunately, I can't share the library, but hopefully this information will help you get where you want to be.
Like I said, it would be easier if you can just get a c developer to write a wrapper for you to keep it simple in LabVIEW. Alternatively, you might try getting your m-code to work in Mathscript.
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I'm a novice with LV
I made a simple ADC via centronics (ADC08831+LM35) and
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Hallo, Delta_Force,
Du meintest am 15.11.00 zum Thema Re: LabVIEW St. 3.1Win: how to interface to Centronics:
>> Reading from the LP port is tricky. How is the port configured (in
>> the CMOS setup): SPP, EPP or ECP?
> SPP: it's an old 486
>> Do you know how to switch "base+0" from output to input?
> No I don't
From Vernon Buergs Interrupt list (port list):
--------P-P03BC03BF--------------------------
PORT 03BC-03BF - PARALLEL PRINTER PORT (MDA's LPT1)
Range: PORT 0278h, PORT 0378h, or PORT 03BCh
SeeAlso: MEM 0040h:0008h
03BC -W data port
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03BE RW control port (see #P0659)
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Bit(s) Description (Table P0658)
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6 NOT acknowledge (approx. 5us low pulse)
5 out of paper
4 printer is selected
3 *no* error
2 IRQ has *not* occurred
(PS/2) printer returned -ACK
1-0 reserved
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reading the status register
SeeAlso: #P0659
Bitfields for parallel interface control port:
Bit(s) Description (Table P0659)
7-6 reserved
7 (see PORT 037Bh bit 7)
5 (PS/2) enable bidirectional port
(also requires enabling via PORT 0102h)
4 enable IRQ (via -ACK)
3 select printer (SLCT IN line)
2 =0 initialize printer (-RESET line)
1 automatic line feed
0 strobe (must be set for minimum of 5 microseconds)
SeeAlso: #P0658
--------V-P03BF------------------------------
PORT 03BF - Hercules configuration switch register
Note: can also be found on EGA and VGA clones in Hercules emulation
03BF -W configuration switch register (see #P0660)
03BF -W (ET4000) Hercules compatibility register (see #P0661)
03BF RW (Genoa SuperEGA) miscellaneous register
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compatible with Hercules configuration register, but may contain
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7-2 reserved
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0 =0 prevents graphics mode
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He describes Port 03bch, Port 0378h ("LPT1") and 0278h ("LPT2") act in
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On a SPP port you cannot read from (base+0), you can only use some of
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Viele Gruesse!
Helmut

How to use labview with the handyboard

Hi,
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Thx...

I'm assuming you're talking about this, since you didn't provide a link for those of us who don't know what you're talking about.
As the other poster said, you didn't say how you want to use LabVIEW with it. If you want to write LabVIEW programs than run on the microprocessor, then you're out of luck. If you want LabVIEW to interact with it, then you've got a couple of options, SPI probably being the best, but it also has DI and AI that you could use to communicate with it - the DI's could be used as a parallel interface.
Message Edited by Matthew Kelton on 12-17-2007 02:21 PM

How to use labview with gpib to connect with Agilent PNA E8362B ?

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Interface labview program with real appliances

How do i interface labview program with real life appliances. For example: interface with light bulb

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(Mid-Level minion.)
My support system ensures that I don't look totally incompetent.
Proud to say that I've progressed beyond knowing just enough to be dangerous. I now know enough to know that I have no clue about anything at all.

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Hi,
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Well Chris,
         I was about to post the solution, but as I said, I'm in a middle of experts
It took me 3 hours to figure it out. I should've checked your answer . I resolved to the same suggesstion of yours. I only added some functionality to get the newbies like me being acquainting with how easy to work with LABVIEW mathscript based on MATLAB knowledge.
Waleed El-Badry MSc.,MCPD, ISTQB Certified Tester
Assistant Lecturer
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Attachments:
Play with Mathscript.vi ‏35 KB

Labview controlling Matlab

I'm trying to get Labview 8.6 to programatically launch and run MATLAB 7.5.0. We have routines currently written in MATLAB that interface with a third party's software to download data from some proprietary equipment. Is there an ActiveX example or a better way to get Labview and MATLAB to talk nicely? I've written a bare bones vi that will allow me to launch MATLAB but I keep getting an "Unexpected MATLAB operator" error when I try to use the Execute method on the MLAPP.DIMLApp Invoke Node. I'm not even sure if this is the right approach for what I'm trying to do.
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Ultimately, it would be nice if I could remotely launch MATLAB and run selected .m files. I would also need to pass small amounts of data back and forth from the Labview GUI to the MATLAB back end. Any help would be greatly appreciated!
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Check out LabVIEW 2009 and the New X-series DAQ!

Interface labview with the test board to identify opamp pins automatically

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pratheek wrote:
Thanks alot. pin numbers are variable. I need to test the functional and test parameters for 8, 10, 14, 16 pin opamps.
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Is there a way to interface Labview Web GUI with Fusion Charts?

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Trasferire dati da Labview a Matlab e viceversa

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How to interface LabVIEW to Matlab?

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