Create MIT DLL from LabVIEW

[ThetaMa]

We have developed a LabVIEW system that runs a DLL compiled with the NI Veristand compiler in Simulink. The system also loads FMU's without any problem (!).

For another project I don't have the simulink available so I am not able to compile the required code. Does anyone know if it is possible to compile a DLL (FMU's probably not supported yet) from the LabVIEW environment and run it using the model interface? 

I have searched some, but I only see solutions with NI Veristand (that is if they are a solution to my problem) and Veristand is expensive. Is this the only solution?

[wiebe@CARYA]

You can make your own DLL with the application builder.

If the API is correct, it will work.

[santo_13]

I think the OP is talking about creating a model dll, used for HIL/VIL testing.

[wiebe@CARYA]

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@santo_13 wrote:

I think the OP is talking about creating a model dll, used for HIL/VIL testing.

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Yes, and if the API is correct, it will work.

[ThetaMa]

santo_13 is right, I wan't to build a dll in LabVIEW which I can use with the "Model Interface" Palette.

I would find it strange if it is only possible to run DLL's compiled from an external program, and not from within LabVIEW itself.

[wiebe@CARYA]

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@ThetaMa wrote:

santo_13 is right, I wan't to build a dll in LabVIEW which I can use with the "Model Interface" Palette.

I would find it strange if it is only possible to run DLL's compiled from an external program, and not from within LabVIEW itself.

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That's not weird, it's not true.

I've build lots of LabVIEW DLLs and used them in LabVIEW.

[ThetaMa]

A lot of us use labview compiled dll's within LabVIEW, but that is not what this topic is about.

Dll's in the model interface have a special setup, simulation time, names of input/output and parameters etc. It is not a "normal" dll (if that exist).

If you have a solution I would really like to know. An answer like "yes it is possible" is not helping.

[wiebe@CARYA]

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@ThetaMa wrote:

Dll's in the model interface have a special setup, simulation time, names of input/output and parameters etc. It is not a "normal" dll (if that exist).

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The setup (inputs\outputs\parameters etc) is called the API... All DLLs have a API. Seems exactly like any (normal) DLL to me.

Again, if the API is correct, it will work.

You know the API, what is stopping you from making a DLL with that API in LabVIEW?

Does these DLLs you want to 'copy' have header files? If so, you could try the Import Shared Library Wizard in Tools»Import»Shared Library Wizard.

[santo_13]

I have once tried a demo of model simulation features of the Model Interface Toolkit.

Maybe you can try installing https://www.ni.com/en-us/shop/software/products/labview-model-interface-toolkit.html

[wiebe@CARYA]

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wiebe@CARYA wrote:

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@ThetaMa wrote:

Dll's in the model interface have a special setup, simulation time, names of input/output and parameters etc. It is not a "normal" dll (if that exist).

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The setup (inputs\outputs\parameters etc) is called the API... All DLLs have a API. Seems exactly like any (normal) DLL to me.

Again, if the API is correct, it will work.

You know the API, what is stopping you from making a DLL with that API in LabVIEW?

Does these DLLs you want to 'copy' have header files? If so, you could try the Import Shared Library Wizard in Tools»Import»Shared Library Wizard.

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BTW if you have such a dll and VIs that call it, that would also be enough to create a DLL with the same API. Of course the functions would be like black boxes. Guessing what's inside each function might not be easy. I never said it would be easy...

EDIT: Not sure, but the API might be like described here: Package Generated Code as Shared Libraries - MATLAB & Simulink