When I run a s-function block generated by legacy code tool, matlab system error dialog will be show up. Why?

Hello all,

I am new to creat S-functions from C code and also not good at c coding. I use the Legacy Code Tool to incorporate my code. It can be compiled successfully. Then i used "legacy_code('slblock_generate',def)" command to generate the block. However, when I tried to run it, the matlab system error dialog was show up.

Your help is much appreciated!

Liwa

-------------------------- putcmda.h ---------------------------------

 #ifndef PUTCMDA_H_
#define PUTCMDA_H_
//put command acknowledge for a specific command to the output buffer
void putcmda(char* const out, int cmd_no);
#endif

-------------------------- putcmda.c ---------------------------------

 #include <stdio.h>
#include <string.h>
#include "putcmda.h"
#define NUM_CMD 4    //number of commands (STR_CMDS)
#define MAX_CMD_LEN 6  //max length of commands (STR_CMDS)
#define STR_CMDS {"start","stop","info","get"}
const char cmd[NUM_CMD][MAX_CMD_LEN] = STR_CMDS;
#define STR_CMD         "cmd"
#define STR_CMD_ACK        "cmd_ack"
//*****************************************************************************
//
void putcmda(char* const out, int cmd_no)
{
  if(cmd_no > 0 && cmd_no <= NUM_CMD)
  {
    strcpy(out, "{\"");
    strcpy(out + strlen(out), STR_CMD_ACK);
    strcpy(out + strlen(out), "\":\"");
    strcpy(out + strlen(out), cmd[cmd_no -1]);
    strcpy(out + strlen(out), "\"}");
  }
  else *out = '\0';
}

-------------------------- LCT SCRIPT ---------------------------------

def = legacy_code('initialize');
% Populate the data struture
def.SourceFiles = {'putcmda.c'};
def.HeaderFiles = {'putcmda.h'};
def.SFunctionName = 'legacy_pcasfcn';
def.OutputFcnSpec = 'putcmda(uint8 u1, uint8 y1[30])';
def.SampleTime = [-1,0];
% Generate the S-function
legacy_code('sfcn_cmex_generate', def);
% Compile the MEX-file
legacy_code('compile', def);
% Generate a TLC-file
legacy_code('sfcn_tlc_generate', def);

-------------------------- System ERROR --------------------------------

Answer 1

[Liwa]

I found the error. In the LCT script, it should be def.OutputFcnSpec = 'putcmda(uint8 y1[30], uint8 u1)'. Thank you all.