这可能是一个简单的问题。但我找不到解决这个问题的方法。我正在使用 s 功能块将波形信号输入到我的算法中。正在从大约 2000 点的文件中读取波形信号
首先，我从等于 50 的模拟时间开始。然后它只读取 50 分。我检查了“tout”变量。它是 0,1,2,....50
然后我将模拟时间增加到 100。仍然结果相同。只读取 50 点。但是 tout 是 0,2,4,6..50
我尝试了多达 10000 个。无论我做什么，它只读取 50 个值，时间步长为 0,200,400,600 等。这是我的 s-function 或 simulink 设置的问题吗？这是c s-function文件
/* Give S-function a name */
#define S_FUNCTION_NAME Readip
#define S_FUNCTION_LEVEL 2
/* Include SimStruct definition and file I/O functions */
#include "simstruc.h"
#include <stdio.h>
#include <stdlib.h>
static FILE* file2;
/* Called at the beginning of the simulation */
static void mdlInitializeSizes(SimStruct *S)
{
ssSetNumSFcnParams(S, 0);
if (ssGetNumSFcnParams(S) != ssGetSFcnParamsCount(S)) {
return;
}
if (!ssSetNumOutputPorts(S, 3)) return;
ssSetNumContStates(S, 0);
ssSetNumDiscStates(S, 0);
ssSetOutputPortWidth(S, 0, 1);
ssSetOutputPortDataType(S,0,DYNAMICALLY_SIZED);
ssSetOutputPortOptimOpts(S, 0, SS_REUSABLE_AND_LOCAL);
ssSetOutputPortWidth(S, 1, 1);
ssSetOutputPortDataType(S,1,DYNAMICALLY_SIZED);
ssSetOutputPortOptimOpts(S, 1, SS_REUSABLE_AND_LOCAL);
ssSetOutputPortWidth(S, 2, 1);
ssSetOutputPortDataType(S,2,DYNAMICALLY_SIZED);
ssSetOutputPortOptimOpts(S, 2, SS_REUSABLE_AND_LOCAL);
ssSetNumPWork(S,1);
ssSetNumSampleTimes(S, 1);
}
/* Set sample times for the block */
static void mdlInitializeSampleTimes(SimStruct *S)
{
ssSetSampleTime(S, 0, CONTINUOUS_SAMPLE_TIME);
ssSetOffsetTime(S, 0, 0.0);
}
#define MDL_START /* Change to #undef to remove function */
#if defined(MDL_START)
/* Function: mdlStart ========
===============================================
* Abstract:
* This function is called once at start of model execution. If you
* have states that shou
ld be initialized once, this is the place
* to do it.
*/
static void mdlStart(SimStruct *S)
{
/*at start of model execution, open the file and store the pointer
*in the pwork vector */
void** pwork = ssGetPWork(S);
FILE *datafile;
datafile = fopen("table.data","r");
pwork[0] = datafile;
}
#endif /* MDL_START */
/* Function: mdlOutputs =======================================================
* Abstract:
* In this function, you compute the outputs of your S-function
* block. Generally outputs are placed in the output vector, ssGetY(S).
*/
static void mdlOutputs(SimStruct *S, int_T tid)
{
//get pointer to the block's output signal
real_T *y1 = ssGetOutputPortSignal(S,0);
real_T *y2 = ssGetOutputPortSignal(S,1);
real_T *y3 = ssGetOutputPortSignal(S,2);
char a[10];
char b[10];
char c[10];
/*get pointer to array of pointers, where the first element is the address
*of the open file */
void** pwork = ssGetPWork(S);
/*read a floating point number and then the comma delimiter
*store the result in y*/
fscanf(pwork[0],"%s %s %s",&a,&b,&c);
*y1=atof(a);
*y2=atof(b);
*y3=atof(c);
}
/* Function: mdlTerminate =====================================================
* Abstract:
* In this function, you should perform any actions that are necessary
* at the termination of a simulation. For example, if memory was
* allocated in mdlStart, this is the place to free it.
*/
static void mdlTerminate(SimStruct *S)
{
//close the file
void** pwork = ssGetPWork(S);
FILE *datafile;
datafile = pwork[0];
fclose(datafile);
}
/*=============================*
* Required S-function trailer *
*=============================*/
#ifdef MATLAB_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