S-Function: Error in generating the interface to Simulink

Question

Luca 2025-4-14

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2176270-s-function-error-in-generating-the-interface-to-simulink

回答： Luca 2025-4-15

Hello everyone.

I want to learn how to generate the S-function, but when I try to generate it with Legacy code in a simple example, MATLAB gives me an error that I can't figure out.

#include "Op_Mult.h"

void Op_Mult(short u1, short u2, int *y1)

{

*y1 = (int32_T)(u1 * u2);

}

#ifndef _H_OP_MULT_

#define _H_OP_MULT_

#include "rtwtypes_mex.h"

void Op_Mult(short u1, short u2, int *y1);

#endif

clear;

clc;

% mex setup

% mex -setup

% Legacy Code: Integrate C/C++ code

% Initialize legacy code

def=legacy_code('initialize');

% Define the name of the S-Function

def.SFunctionName='fc_Op_Mult';

% Define S-Function interface

def.OutputFncSpec='void Op_Mult(short u1, short u2, int y1[1])';

% Define the name of the .c

def.SourceFiles={'Op_Mult.c'};

% Define the name of the .h

def.HeaderFiles={'Op_Mult.h'};

% Simulate the model in accelerated mode

% legacy_code('rtwmakecfg_generate', def);

% Generate the C code for the S-Function

legacy_code('sfcn_cmex_generate', def);

% Compile S-Function

legacy_code('compile', def);

% Generating Masked S-Function Blocks

legacy_code('slblock_generate', def);

Error in legacy_code (line 103)

[varargout{1:nargout}] = legacycode.LCT.legacyCodeImpl(action, varargin{1:end});

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Error in Op_Mult (line 27)

legacy_code('sfcn_cmex_generate', def);

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

If I comment on this line: def.OutputFncSpec='void Op_Mult(short u1, short u2, int y1[1])'; there are no errors, but the Simulink interface has no inputs and outputs.

Could you help me? I have no idea what to do.

Thanks in advance.

Kind regards.