Re: [Discuss-gnuradio] OOT Module using external function

I don't know what a .obj file from matlab coder is.... but completely ingoring that file it sounds like you need to tell cmake that the .cpp file from matlab needs to be built.

On Fri, May 5, 2017 at 9:38 AM, Ali <03dober@gmail.com> wrote:

Hi,

Under gr-TUTORIAL/lib there is myfunction_impl and myfunction_impl.cc files which gr_modtool itself created. 

MATLAB Coder gives .h, .cpp and .obj files. I put them under the same directory(gr-TUTORIAL/lib).

Then what I do is including all .h files that MATLAB generated inside two files that gr_modtool generated(I wrote #include ... in both .h and .cc file). 

In the following part of the .cc file I tried to use the function that MATLAB generated.

------------------------------

int myfunction_impl::general_work(...)

{

const float *input1 = ..

..

for (int i=; i<noutput_items; i++)

{

my_function(...)

}

consume_each(noutput_items);

return noutput_items;

}

--------------------------------

I don't know how to link .obj files to my module? Could you suggest a piece of code?

Or after the things that I told now, is there any major mistake that I am doing?

Thanks,

Ali

2017-05-04 17:12 GMT+03:00 West, Nathan <natw@ostatemail.okstate.edu>:

You have an external object that you need to link your module to. That cpp file from matlab gets compiled to an object file somehow-- you haven't specified how. Then you need to link your block to that object.

On Wed, May 3, 2017 at 2:39 AM, do ber <03dober@gmail.com> wrote:

Hi to all, 

I am trying to create my own GNURadio block(OOT). I will use an external function generated by MATLAB Coder. MATLAB Coder gives the necessary .cpp and .h files. In the main module .cc file, which gr_modtool automatically creates I am including all the header files created by MATLAB Coder. Then under the work function of module I am just using my main function generated from MATLAB.

Input/output declarations are ok, so there is no error during make, cmake, make install processes. When I open the GNURadio I see my block. Bu there are some problems:

When I comment my external function (i.e. when I did not use my external function) block works(do  nothing but works) and there is information in "Documentation tab" as all the normal blocks have. 

But when I uncomment my external function (i.e. when I used my external function under work function) I get the following error in GNURadio and there is no information on "Documentation page", there is only a blank page.

self.TUTORIAL_myblock_0 = TUTORIAL.myblock(6)

AttributeError:'module' object has no attribute 'myblock'

Here, 6 is the antenna number in my project. It is the only argument that I enter into my block.

So, I searched the literature but I could not find any project using functions from external file. For example, there is an example "My_QPSK_Demodulator" which is using get_minimum_distance function but it is a small function and is also defined inside the main module code. 

** In short, I have myblock.cc and myblock.h files. Also, I have function .cpp and .h files. I want to use that function inside myblock.cc 

What are your suggestions? Is there any example using this approach? That would be awesome.

Regards,

Ali

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