C code to S function multi input multi output block using legacy code

Question

Paul 2014-1-23

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/113452-c-code-to-s-function-multi-input-multi-output-block-using-legacy-code

回答： sri prakash muniyandi 2014-10-20

采纳的回答： Kaustubha Govind

Legacy_Script.m

Hi I'm trying to create a multi input to multi output, S function in simulink using the legacy code tool.

I am attempting to input three variables

double trgrqst,
double VehSp,
double systmst

Then do some maths on them and return the values (Been trying to use pointers)

*y1
*y2
*y3

basically something looking like this

I don't seem to be able to get my script to work and I have been trying to work of this Example

My C code I wrote is :

C CODE - named ( car.c) _____________________

#include<car.h>

void car(double trgrqst, double VehSp, double systmst, double *y1, double *y2, double *y3) {

*y1 = 1.4 * trgrqst;

*y2 = 1.5 * VehSp;

*y3 = 5 * systmst;

}

_________ END of C code

Header code- named car.h ___________________________

#ifndef car_H

#define car_H

#include "tmwtypes.h"

extern void car(double trgrqst, double VehSp, double systmst, double *y1, double *y2, double *y3);

#endif

______ End of header

I have also included the m script im using to create the s function

My error code is

_italic_Error using legacycode.util.lct_pParseFcnSpec (line 141) Token (or expression) "double trgrqst" not recognized (in "void car(double trgrqst, double VehSp, double systmst, double *y1, double *y2, double *y3);")

Error in legacycode.util.lct_pGetFullInfoStructure (line 38)

Error in legacycode.LCT/generatesfcn (line 22)

Error in legacycode.LCT.legacyCodeImpl (line 55)

Error in legacy_code (line 87) [varargout{1:nargout}] = legacycode.LCT.legacyCodeImpl(action, varargin{1:end});

Error in Legacy_Script (line 19) legacy_code('sfcn_cmex_generate', def)

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Answer 1

Kaustubha Govind 2014-3-27

1
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/113452-c-code-to-s-function-multi-input-multi-output-block-using-legacy-code#answer_130732

在 MATLAB Online 中打开

As described in the documentation, you cannot used tokens like trgrqst, VehSp, systmst, etc. Legacy Code Tool only knows how to interpret u1, u2, p1, p2, work1, work2, y1, y2 and so on. You may want to change your code to:

def.OutputFcnSpec = 'void car(double u1, double u2, double u3, double *y1, double *y2, double *y3);';

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Answer 2

sri prakash muniyandi 2014-10-20

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/113452-c-code-to-s-function-multi-input-multi-output-block-using-legacy-code#answer_155824

As per the documentation the code should be def.OutputFcnSpec = 'void car(double u1, double u2, double u3, double y1[1], double y2[1], double y3[1]);';. becouse pointers are not allowed in LCT code strctures.