How can I use C code generated by Matlab coder?

I'm trying to use a simple function generated from matlab coder on my PIC MCU. The matlab function is:

function [c] = myMult(a)
b = [1,2,4;
     7,1,2;
     8,4,9];
c = a.*b;

And the generated C code is:

 /*
 * myMult.c
 *
 * Code generation for function 'myMult'
 *
 * C source code generated on: Wed Jul 17 10:22:38 2013
 *
 */

 /* Include files */
#include "myMult.h"

 /* Function Definitions */
void myMult(real_T a, real_T c[9])
{
  int32_T i0;
  static const int8_T b[9] = { 1, 7, 8, 2, 1, 4, 4, 2, 9 };

/* Mult */
for (i0 = 0; i0 < 9; i0++) {
  c[i0] = a * (real_T)b[i0];
}
}

 /* End of code generation (myMult.c) */

+ some other header files

So, how can I work with function:

 void myMult(real_T a, real_T c[9])

Shouldn't be return value instead of void? Shouldn't be between () only one, input value? I generated C code same way like in webinar MATLAB to C Made Easy.

Thank's for replies

Viktor

Answer 1

[Kaustubha Govind]

The second input argument is actually a pointer, if you notice that it's passed in as real_T c[9], which is equivalent to real_T *c. Essentially, you need to allocate memory for a real_T vector of 9 elements and pass it in by reference. The output is assigned to that same variable.

[Viktor]

Thank's for answer. I must learn more about C language

Viktor