how do i load dll files with loadlibrary function?

hi guys (and girls :) )... I am working with DSP board from Texas Instruments. I wrote a code on Matlab so I can use this board in my specific way.

I am having an error at the beginning of my code. I need to load the dll files with "loadlibrary" function. the beginning of the code is:

if ~libisloaded('wvdll')
    clear all 
    disp('clear all') 
    % hfile = fullfile('C:\Users\mojob1\Desktop\dsp\ADC_Project','wvdll.dll'); 
    % loadlibrary('wvdll',hfile) 
    [notfound, warnings] = loadlibrary('wvdll','wvdll.dll','wvdll.h','mfilename');  
    %[notfound, warnings] = loadlibrary('wvdll','wvdll.h'); 
    libfunctions('wvdll'); 
end

and that's the error that I got: Error using loadlibrary (line 153) Option wvdll.h is not a valid loadlibrary option.

      Error in Main (line 15) [notfound, warnings] = loadlibrary    ('wvdll','wvdll.dll','wvdll.h','mfilename');

if some-one can help with that I will be more the grateful.

matan.

[matan]

this link is where I got my dll files..

http://e2e.ti.com/support/data_converters/high_speed_data_converters/w/design_notes/1783.aspx?keyMatch=adc12d1800rfrb dll files&tisearch=Search-EN

the zip file is: 1261.Programmers' Guide to WV5_DLL API r0p9.zip

thanks matan

Answer 1

[Geoff Hayes]

Check out the documentation for loadlibrary at http://www.mathworks.com/help/matlab/ref/loadlibrary.html. Your line of code

 loadlibrary('wvdll','wvdll.dll','wvdll.h','mfilename');

raises the error Option wvdll.h is not a valid loadlibrary option because this line is using the header file as the third input which is reserved for the name-value (as fourth input) pair arguments. Since the name of the header file is the same as the dll, try using just

 loadlibrary('wvdll');

making sure the path to the dll has been added to the search path. See http://www.mathworks.com/help/matlab/ref/loadlibrary.html#btgwwzn for an example.

[matan]

first of all thanks for responding. I tried many lines... and I keep getting the same errors. I tried:

[notfound,warnings]=loadlibrary('wvdll.dll','wvdll.h','mfilename','mHeaderc');

I also tried:

[notfound,warnings]=loadlibrary ('wvdll')

and the error I got is:

Error using loadlibrary (line 419)

There was an error loading the library "C:\Users\mojob1\Desktop\rf

photonic\mpi\dsp\ADC_Project\wvdll\wvdll.dll"

Error in Main (line 13)

[notfound, warnings] = loadlibrary('wvdll.dll','wvdll.h','mfilename',

'mHeaderc')

Caused by:

    Error using loaddefinedlibrary

and the other error for the second line was:

Error using loadlibrary (line 419)

There was an error loading the library "C:\Users\mojob1\Desktop\rf

photonic\mpi\dsp\ADC_Project\wvdll\wvdll.dll"

about the tip that u gave me just to try loadlibrary (wvdll); the matlab gave me an error to add [notfound, worning].

so what sould I do next?

if it will possible and someone have some "free-time" that's my Skype name and I get share screen with someone... Skype name: matanantebi thanks

[Geoff Hayes]

What happens when you run the command

 [notfound,warnings] = loadlibrray('wvdll');

[matan]

when I'm trying it the error I get is:

Error using loadlibrary (line 253) A 'Selected' compiler was not found. You may need to run mex -setup.

Error in Main (line 15) [notfound, warnings] = loadlibrary('wvdll');

when I'm trying to do mex - setup I get another error.

No supported SDK or compiler was found on this computer. For a list of supported compilers, see http://www.mathworks.com/support/compilers/R2013b/win64.html

Undefined function or variable 'setup'.

and when I am trying to download some new version of SDK some problem comes up...

:/

[Geoff Hayes]

What does mex.getCompilerConfigurations('C','Selected') return? Have you checked http://e2e.ti.com/support for similar queries of using MATLAB and this dll?

[matan]

when I tried your line mex.getCompilerConfigurations I keep getting the same error a compiler was not found...

and the link http://e2e.ti.com/support isn't opening...

[Geoff Hayes]

Try this link instead http://e2e.ti.com/support/w/forums/261.ti-e2e-community-forums-site-map.aspx.

As for setting up mex, there is no space between the dash and setup like you have above. It is just

 mex -setup

So you can try that again.

[matan]

first of all thanks for everything! now I have the Microsoft SDK 7.1, and I also have the .NET framework 4.0 and 4.5. and I have compilers on my computer.

now I have another problem. my Matlab is 64 bit (I check it with the line mexext. the dll files which I have are 32 bit. so I get an error which say that it doesn't know how to work with dll 32 bit files when my Matlab 2013b is 64 bit.

this is my new error:

Error using loadlibrary (line 421)

There was an error loading the library

"C:\matan\moran\ADC_Project\wvdll.dll" ??C:\matan\moran\ADC_Project\wvdll.dll ???? ???? ?????? Win32?.

Error in Main (line 16)

    [notfound, warnings] = loadlibrary('wvdll');

Caused by:

    Error using loaddefinedlibrary
    ??C:\matan\moran\ADC_Project\wvdll.dll ???? ???? ??????
    Win32?.

so my questions are: 1) do I understand correctly that the problem is because I have Matlab 64bit and the dll files are 32 bit? 2) do I need to download a Matlab of 32 bit? or the installation at the end will ask me if I want 64 bit or 32 bit?

Matan.

[Geoff Hayes]

The 64 bit MATLAB vs 32 bit dll could be the problem. You should look at the link http://e2e.ti.com/support/data_converters/high_speed_data_converters/f/68/t/224003.aspx which outlines a similar issue. As for your second question, I have no background to suggest what you should do there.