Help understanding example for Inlining Matlab S-function

In https://au.mathworks.com/help/rtw/tlc/introduction-inline-s-functions.html#f34125, I am trying to follow the example under the heading "Inline MATLAB File S-Functions"

Step 5 is unclear:

"Step 5 :On the Signal Attributes tab of the Inport Block Parameters dialog box, set the Port dimensions parameter to 5."

What do I need to click on to find this? Where do I find the "Inport Block Parameters dialog box"?

Thanks,

Answer 1

[galaxy]

You double click to Inport block, choose the Signal Attributes tab

[Nshine]

The example instructs you to build this model, in which there in no Inport block. Are these instructions incorrect?

[galaxy]

I think step 5 for example about code generation from S-Function block.

So when you change contant block to inport block, generated code will same below.

/* S-Function (timestwo): '<Root>/MATLAB S-Function' */
  /* Multiply input by two */
  {
    int_T i1;
    const real_T *u0 = &times2_B.Gain[0];
    real_T *y0 = &times2_Y.Out1[0];
    for (i1=0; i1 < 5; i1++) {
      y0[i1] = u0[i1] * 2.0;
    }
  }

5 dimenssion of inport is maximum of for loop

[Nshine]

Thanks galaxy. That makes sense.

I'll note as well that there is no instruction in this example to compile the code by cliking on the Build icon (shortcut: Ctrl+B).

Once I build it, I can see a folder created named"

<simulink model name>_grt__rtw

In this folder is the file:

<simulink model name>.c

which has the lines in the previous comment within the "Model step function"

/* Model step function */
void times2_B_step(void)
{
  /* S-Function (timestwo): '<Root>/S-Function' incorporates:
   *  Constant: '<Root>/Constant'
   *  Outport: '<Root>/Out1'
   */
  /* Multiply input by two */
  {
    int_T i1;
    const real_T *u0 = &times2_B_P.Constant_Value[0];
    real_T *y0 = &times2_B_Y.Out1[0];
    for (i1=0; i1 < 10; i1++) {
      y0[i1] = u0[i1] * 2.0;
    }
  }
  etc...

However, during there is an error during compilation:

Error(s) encountered while building "times2_B": ### Failed to generate all binary outputs.

If anyone else encounters this error, I found the same problem discussed here: https://au.mathworks.com/matlabcentral/answers/156208-how-do-i-fix-failed-to-generate-all-binary-outputs-error.

Having a path where the simulink model, .m and .tld files are stored without white spaces fixed the problem.