How to call dll from GUI????

Hi,

          we created dll for simulink model., Now we are trying to call the dll from GUI but its not taking the command.,

if not(libisloaded('TOLI_win32'))

hfile = 'Tolidll.h';

libfile='TOLI_win32.dll';

loadlibrary(libfile,hfile);

 end

libfunctionsview TOLI_win32;

calllib('TOLI_win32','TOLI_initialize',1);

    we gave command like this., But its not taking., This method is corerct pls help us in ressolving this issue?

[Kaustubha Govind]

Please specify what error messages you see, or explain what you mean why "its not taking".

[vinothkannan K]

@ Kaustubha Govind : Actually we developed one sample model, If we are selecting check box means it should update edit box as 1, for same model we created dll., but now if am selecting check box means its not updating..

[Kaustubha Govind]

How does the model update the edit box? What exact commands do you use to do that?

[vinothkannan K]

This are the commands we are using, We are calling this (IFM_Select_fcn) function from tlc using FEVAL.

 function select =  IFM_Select_fcn

 persistent h;
if isempty(h)
  h = guidata(Tolisys);
end 
select = get(h.IFM_Select, 'Value');

 if (select)

           set(h.IFM_Mode, 'String', 2);
else
           set(h.IFM_Mode, 'String' ,0);
end

Answer 1

[Kaustubha Govind]

I presume that this is a follow-up question from your (colleague's previous question) here. As I mentioned in my comment on that question:

[T]hat would make your output be a constant value received from the GUI at the time of code-generation - is this what you want? In that case, simply put your code to invoke the GUI into a helper MATLAB function and call it using FEVAL.

The code-generated from the S-function essentially just returns a constant output which is equal to the value of the checkbox at the time of code-generation. It doesn't actually evaluate the function IFM_Select_fcn. Note that it is not possible to generate standalone C code from MATLAB code that involves GUI operations. Perhaps you should explain more about why you even want to have a DLL do this for you, when you can simply write MATLAB code to do what you need (since you're calling the DLL from MATLAB anyway).

[vinothkannan K]

Now just for testing purpose we are calling dll from Matlab.

[Kaustubha Govind]

What is the final intended application for the DLL?

[vinothkannan K]

We have to create .exe for our model, It should work with out matlab also..