原创 Labwindows/cvi8.5学习日志(30)----虚拟信号发生器

//*********************************************************
// Labwindows/cvi8.5 虚拟信号发生器    
// szlihongtao
// 2010-06-28
// 参照 <基于Labwindows/CVI的虚拟仪器设计与应用> page108
// 综合有关源代码改写而成
//*********************************************************
/************************************************************************/
/*  This program introduces the callback function style of programming  */
/*  in LabWindows/CVI.  The program simply generates 4 kind of waves    */
/*  and plots them on a graph control.  The plotting is triggered by an */
/*  Acquire button on the front panel, and program execution is halted  */
/*  by the Quit button.                                                 */
/************************************************************************/
#include <analysis.h>
#include <ansi_c.h>
#include <cvirte.h>       
#include <userint.h>
#include "sample2.h"
//*********************************************************
#define pi  3.1415926
//*********************************************************
static int panelHandle;
static int n="200";
static double datapoints[256];
                 
void GenerateWave (int shape);
/************************************************************************/
/*  The main function is very simple when you use callbacks.  Notice    */
/*  that you only have to load and display the panels. The two callback */
/*  functions, AcquireData (executed when the Acquire button is clicked)*/
/*  and Shutdown (executed when the Quit button is clicked) are         */
/*  installed when you load the panels.  Calling RunUserInterface simply*/
/*  tells LabWindows/CVI to begin passing all event information from    */
/*  front panels to the appropriate callback functions.                 */
/*                                                                      */
/*  Open the callback.uir file to see how the callback functions are    */
/*  assigned.  If you edit the Acquire button in the UIR editor, you    */
/*  will see the AcquireData function name listed in the Callback       */
/*  Function control in the dialog box.                                 */
/************************************************************************/
int main (int argc, char *argv[])
{
 if (InitCVIRTE (0, argv, 0) == 0) /* Initialize CVI libraries */
  return -1;                     /* out of memory */
 if ((panelHandle = LoadPanel (0, "sample2.uir",PANEL)) < 0)
  return -1;
 DisplayPanel (panelHandle);
 RunUserInterface ();
 return 0;
}
/*************************************************************************/
/*  The AcquireData function is assigned to the Acquire button in the    */
/*  User Interface Editor.  The function is automatically prototyped in  */
/*  the header file callback.h generated by LabWindows/CVI. This function*/
/*  is called by LabWindows/CVI whenever you click on the Acquire button */
/*  during program execution.                                            */
/*                                                                       */
/*  Notice that you must decide which event to respond to in the func-   */
/*  tion.  In this case, the datapoints are generated only when a        */
/*  COMMIT event is sensed (up mouse click).  LabWindows/CVI can recog-  */
/*  and pass many different event types, such as LEFT_CLICK, RIGHT_CLICK,*/
/*  LEFT_DOUBLE_CLICK, and so on.                                        */
/*************************************************************************/
int CVICALLBACK AcquireData (int panel, int control, int event,
  void *callbackData, int eventData1, int eventData2)
{
    int trace_color, shape;
    double caiyang,frequency;
                       
    if (event ==EVENT_COMMIT)
 {
  GetCtrlVal (panelHandle, PANEL_WFM, &shape);   /* 采集波形 */  
  GenerateWave (shape);
 
  GetCtrlVal (panelHandle, PANEL_COLOR, &trace_color);    /* 采集颜色 */  

      DeleteGraphPlot (panelHandle, PANEL_GRAPH, -1, 1);
      PlotY (panelHandle, PANEL_GRAPH, datapoints, n, VAL_DOUBLE,
         VAL_THIN_LINE, VAL_EMPTY_SQUARE, VAL_SOLID, 1, trace_color); 
 }
 return 0;
}
//*********************************************************
/* 定义波形函数 */
//*********************************************************
void GenerateWave (int shape)
{
   // 定义参数类型
   double frequency,valtage,caiyang,phase;
   double delay,dt,dutyCycle;

   GetCtrlVal (panelHandle, PANEL_PHASE, &phase);    /* 采集偏移量（度）*/ 
   GetCtrlVal (panelHandle, PANEL_FRE, &frequency); /* 采集 频率(Hz) */  
   GetCtrlVal (panelHandle, PANEL_VAL, &valtage);    /* 采集 幅值(V) */
   GetCtrlVal (panelHandle, PANEL_CAIYANG, &caiyang); /* 采集采样频率 */

   if (valtage>5
  || valtage<-5)   /* 提示错误信息（幅值应在-5~5之间） */  
    MessagePopup ("故障提示", "哈哈，电压超出范围了!");
 else
  {
  switch (shape)
    {
   case 0:     /* 三角波 */
          TriangleWave (n,valtage,frequency/caiyang,&phase,datapoints);
          break;
      case 1:      /* 正弦波*/
          SineWave (n,valtage,frequency/caiyang,&phase,datapoints);
          break;
      case 2:      /*方波 */
      dutyCycle=33.0;  
          SquareWave (n,valtage,frequency/caiyang,&phase,dutyCycle,datapoints);
          break;
      case 3:      /*sincwave */
   {   
      /*定义部分变量参数值 */
      delay=1.57;   // 产生任意波形的时候要用到这个参数
      dt=(2*pi)/100.0;
    
          Sinc(n,valtage,delay,dt,datapoints);
          break;  
   }  
        default:
          break;
    }
  }
 }
//*********************************************************
int CVICALLBACK Shutdown (int panel, int control, int event,
  void *callbackData, int eventData1, int eventData2)
{
 if (event ==EVENT_COMMIT)
    QuitUserInterface(0);
 return 0;
}
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