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

2014 1 23
2 个回答
回答已采纳
更新时间：2014 10 20
4 次查看（30 天）

0 个投票

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)
  1. *y1
  2. *y2
  3. *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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 采纳的回答

Kaustubha Govind
Kaustubha Govind 2014-3-27

1 个投票

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);';

更多回答（1 个）

1 个投票

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.

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