Is there a way to generate c code for system function which runs batch file?

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sai kamal sreeja veepuri 2018-1-9

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https://ww2.mathworks.cn/matlabcentral/answers/376199-is-there-a-way-to-generate-c-code-for-system-function-which-runs-batch-file

评论： sai kamal sreeja veepuri 2018-1-10

I am trying to run a batch file which eventually runs an exe file. I am trying to use system function to run this batch file.But system is not supported for code generation. Is there a way to generate c code for system function or is there a way with which I can run a batch file which will be supported by code generation?

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Answer 1

Walter Roberson 2018-1-9

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https://ww2.mathworks.cn/matlabcentral/answers/376199-is-there-a-way-to-generate-c-code-for-system-function-which-runs-batch-file#answer_299250

You can coder.ceval() to call CreateProcess() and see https://msdn.microsoft.com/en-us/library/windows/desktop/ms682015(v=vs.85).aspx or the ISO _execv() https://docs.microsoft.com/en-ca/cpp/c-runtime-library/reference/execv-wexecv

In Unix systems, execv() or execvp() would often be used.

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sai kamal sreeja veepuri 2018-1-10

在 MATLAB Online 中打开

#ifdef MATLAB_MEX_FILE
#include <tmwtypes.h>
#else
#include "rtwtypes.h"
#endif
int execute();

This is my header file.

#include <stdio.h>
#include <stdlib.h>
#include "foo.h"
int execute()
{
return system("C:\\Users\\Tester\\Desktop\\Release\\meter_app.bat");
}

This is matlab function which calls execute function.File name is callexecute.m

function y = callexecute  %#codegen
y = 0.0;
if coder.target('MATLAB')
    % Executing in MATLAB, call MATLAB equivalent of
  % C function foo
    y = 'C:\Users\Tester\Desktop\Release\meter_app.bat';
else
    % Executing in generated code, call C function foo
    y = coder.ceval('execute');
end
end

Now when I try to generate c code using below mentioned MATLAB command. it generates c code in codegen/lib/callexecute folder.

codegen -config:lib callexecute execute.c execute.h

Now I have added MATLAB function block and I have added the above mentioned callexecute.m file in MATLAB function block. I have included header file and source file in simulation target. Now when I try to build the simulink model, it complaints implicit declaration of function 'execute' [-Werror=implicit-function-declaration] y = execute(); how do I avoid this error?

Walter Roberson 2018-1-10

在 MATLAB Online 中打开

The non-deploy branch,

y = 'C:\Users\Tester\Desktop\Release\meter_app.bat';

should also

system(y)

You should pay attention to the data type of the return value: system() at the C level returns an int, but in the non-deploy branch you have it returning a character vector. Perhaps you should change the deploy branch to

y = system('C:\Users\Tester\Desktop\Release\meter_app.bat');

I recommend changing your declaration from

int execute();

to

int execute(void);

sai kamal sreeja veepuri 2018-1-10

What care do I have to take in terms of path? I mean the code which is generated by means of codegen -config:lib callexecute execute.c execute.h is in different path and the files that are generated for rest of the simulink model is in different path.Do I have to place both of them in the same place?

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