关于s函数与其他进程之间的通信问题
目前我在做一个课题，要将simulink仿真数据实时传到一个windows进程然后再进行后面的驱动，通过共享内存和事件机制进行二进程之间的同步交互。下面是s函数
#define S_FUNCTION_NAMEmyport
#define S_FUNCTION_LEVEL 2
#include "simstruc.h"
#include "windows.h"
extern HANDLE hGlobalWriteEvent;
extern HANDLE hGlobalReadEvent;
real_T * pshareblock;
HANDLE hMapFile;
DWORD dwWaitResult;
//HANDLE OpenEvent0;
//HANDLE OpenEvent1;
static void mdlInitializeSizes(SimStruct *S)
{
ssSetNumSFcnParams(S, 0);/* Number of expected parameters */
if (ssGetNumSFcnParams(S) != ssGetSFcnParamsCount(S)) {
/* Return if number of expected != number of actual parameters */
return;
}
ssSetNumContStates(S, 0);
ssSetNumDiscStates(S, 0);
if (!ssSetNumInputPorts(S, 1)) return;
ssSetInputPortWidth(S, 0, 6);
ssSetInputPortDirectFeedThrough(S, 0, 0);
if (!ssSetNumOutputPorts(S, 1)) return;
ssSetOutputPortWidth(S, 0, 6);
ssSetNumSampleTimes(S, 1);
ssSetNumRWork(S, 0);
ssSetNumIWork(S, 0);
ssSetNumPWork(S, 0);
ssSetNumModes(S, 0);
ssSetNumNonsampledZCs(S, 0);
ssSetOptions(S, 0);
}
static void mdlInitializeSampleTimes(SimStruct *S)
{
ssSetSampleTime(S, 0, CONTINUOUS_SAMPLE_TIME);
ssSetOffsetTime(S, 0, 0.0);
}
#define MDL_INITIALIZE_CONDITIONS /* Change to #undef to remove function */
#if defined(MDL_INITIALIZE_CONDITIONS)
static void mdlInitializeConditions(SimStruct *S)
{
hMapFile = OpenFileMapping(FILE_MAP_ALL_ACCESS, // Read/write permission.
FALSE, // Do not inherit the name
"MySharemem"); // of the mapping object.
if (hMapFile == NULL)
{
printf("Could not open file-mapping object.");
}
pshareblock=( double* )MapViewOfFile(hMapFile,
FILE_MAP_ALL_ACCESS,
0,
0,
6* sizeof(double));
if (pshareblock == NULL)
{
printf("Could not map view of file.");
}
OpenEvent(
EVENT_ALL_ACCESS,// access
FALSE, // inheritance option
"WriteEvent" // object name
);
OpenEvent(
EVENT_ALL_ACCESS,// access
FALSE, // inheritance option
" ReadEvent" // object name
);
}
#endif /* MDL_INITIALIZE_CONDITIONS */
#define MDL_START/* Change to #undef to remove function */
#if defined(MDL_START)
static void mdlStart(SimStruct *S)
{
}
#endif /*MDL_START */
static void mdlOutputs(SimStruct *S, int_T tid)
{
real_T *u =(real_T *)ssGetInputPortRealSignal(S,0);
real_T*y = (real_T *)ssGetOutputPortSignal(S,0);
y = u;
y = u;
y = u;
y = u;
y = u;
y = u;
}
#define MDL_UPDATE/* Change to #undef to remove function */
#if defined(MDL_UPDATE)
static void mdlUpdate(SimStruct *S, int_T tid)
{
dwWaitResult = WaitForSingleObject( hGlobalReadEvent,
INFINITE);
if (dwWaitResult=WAIT_OBJECT_0)
{
real_T *u = (real_T *) ssGetInputPortRealSignal(S,0);
pshareblock=u;
pshareblock=u;
pshareblock=u;
pshareblock=u;
pshareblock=u;
pshareblock=u;
if ((! ResetEvent(hGlobalReadEvent))||(! SetEvent(hGlobalWriteEvent)))
{
printf("Could not ResetReadEvent or SetWriteEvent.");
}
}
}
#endif /* MDL_UPDATE */
#define MDL_DERIVATIVES/* Change to #undef to remove function */
#if defined(MDL_DERIVATIVES)
static void mdlDerivatives(SimStruct *S)
{
}
#endif /* MDL_DERIVATIVES */
static void mdlTerminate(SimStruct *S)
{
UnmapViewOfFile(pshareblock);
CloseHandle(hMapFile);
}
#ifdefMATLAB_MEX_FILE /* Is this file being compiled as a MEX-file? */
#include "simulink.c" /* MEX-file interface mechanism */
#else
#include "cg_sfun.h" /* Code generation registration function */
#endif
在将c文件编译成mexw32文件时，出现一个错误：
>> mex myport.c
Microsoft (R) Incremental Linker Version 6.00.8168
Copyright (C) Microsoft Corp 1992-1998. All rights reserved.
C:\DOCUME~1\vlp\LOCALS~1\Temp\myport.obj
Creating library _lib6486.x and object _lib6486.exp
myport.obj : error LNK2001: unresolved external symbol _hMutex
myport.mexw32 : fatal error LNK1120: 1 unresolved externals
C:\PROGRAM FILES\MATLAB71\BIN\MEX.PL: Error: Link of 'myport.mexw32' failed.
??? Error using ==> mex
Unable to complete successfully
如果将函数static void mdlUpdate中的
dwWaitResult = WaitForSingleObject( hGlobalReadEvent,
INFINITE);
去掉，则可以通过编译，请高手帮忙，是不是s函数不认识WaitForSingleObject还是什么原因
:@( :@(
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