基于labwindows的虚拟示波器

姓名：学号：专业：综合实验：示波器实验目的（1）了解并掌握虚拟仪器的设计方法，具备初步的独立设计能力。（2）初步掌握对图形化编程语言LabWindows的编程、调试等基本技能。（3）提高综合运用所学的知识独立分析和解决问题的能力。二、实验内容编写一个如下图所示的虚拟示波器。图1三、实验仪器计算机一台，装有LabWindows四、实验原理根据labwindows实验指导书，完成对示波器的设计。五、实验步骤完成用户界面的设计，即仪表板。.首先在界面上加上若干Decoration的矩形来划分面板。选择Graph中的StripChart，设置如图1。图2StripChart设置在下面加一个text文件作为横坐标显示，设置为图2。图3text控件设置接着在左上角放置时钟控件，设置为图3。图4时钟控件设置然后放置电源开关控件和LED指示灯，如图4。图5电源开关及指示灯再放置接收信号频率增益和幅度增益控件，设置为图5和图6。图5接收信号频率增益图6接收信号幅度增益用代码生成器生成程序框架。选择Code>>Generate>>AllCode，在如图2面中选择QuitCallk项后确定。图7生成程序框架插入库函数。将鼠标放在需要插入库函数的地方，点击library菜单来插入。在Library>>AdvancedAnalysis有各种函数，选中任意函数会弹出设置面板，需要设置具体的参数。设置完成后选择Code>>InsertFunctionCall即完成函数插入。完成了程序框架的填写后对每个函数具体按照示波器的各个按钮的功能来写代码。此时要特别注意回调函数的用法，可以在函数上点击右键，选择BrowseIdentifier，如图3，来查看函数的定义与用法举例，还可以在右边的库中查找到其他有类似用法的函数，如图4，方便你的调用。图8查看函数定义图9库函数另外，还可以直接右键，选择FindUIObject来直接查看该函数对应的用户面板上的控件。再完成了程序的编写后就需要进行程序的调试了。点击菜单RunDebug**.exe或点击快捷栏内绿色三角图标就可以运行程序。未开启示波器时显示如图5.电源开关未按下时电源指示灯为绿色，开启电源开关后电源指示灯为红色。图10示波器面板此时，点击电源开关，在选择好输入信号形式，输入信号幅度和频率以及输入信号通道，接受信号通道，曲线滚动模式及频率增益和幅度增益后，就可以显示需要的波形了。六、关键代码及注释#include<analysis.h>//头文件#include<ansi_c.h>#include<cvirte.h> /*做扩展编译时需要*/#include<userint.h>#include"综合示波器.h"#definePI3.1416//宏命令定义#defineTRUE1#defineFALSE0#defineMAX_POINTS51200structCHANNELDATA{ intwaveform; doublefrequency; doublescope; intpointnum; doubledata[MAX_POINTS];//定义通道数据结构体 }Channel1,Channel2;staticinthandle;//定义参数intchannel=0,channel_signal=0;doublechannel_scope_gain=1.0,channel_frequency_gain=1;intchartmode=1;//继续intpower=0;//关闭//静态整形波形staticdoubledata[MAX_POINTS*2];voidGenerateData(void);intmain(intargc,char*argv[])//主函数{ if(InitCVIRTE(0,argv,0)==0) /*做扩展编译时需要*/ return-1; /*读出内存*/ if((handle=LoadPanel(0,"综合示波器.uir",PANEL))<0) return-1; DisplayPanel(handle); Channel1.frequency=1;//通道1初始频率 Channel1.scope=1.0;//通道1初始幅度 Channel1.pointnum=512;//通道1初始采样点数 Channel1.waveform=1;//正弦函数 Channel2.frequency=1; Channel2.scope=1.0; Channel2.pointnum=512; Channel2.waveform=1; RunUserInterface(); return0;}//函数参数设置函数intCVICALLBACKDataFunc(intpanel,intcontrol,intevent, void*callbackData,inteventData1,inteventData2){ doublesignal_scope,signal_frequency; intwaveform;switch(control){casePANEL_SCOPEGAIN:if(event==EVENT_VAL_CHANGED)GetCtrlVal(handle,PANEL_SCOPEGAIN,&channel_scope_gain);break;casePANEL_FREQGAIN:if(event==EVENT_VAL_CHANGED)GetCtrlVal(handle,PANEL_FREQGAIN,&channel_frequency_gain);break;casePANEL_SCOPE: if(event==EVENT_COMMIT) { GetCtrlVal(handle,PANEL_SCOPE,&signal_scope); if(channel_signal==0) Channel1.scope=signal_scope; else Channel2.scope=signal_scope; } break;casePANEL_FREQUENCY: if(event==EVENT_COMMIT) { GetCtrlVal(handle,PANEL_FREQUENCY,&signal_frequency); if(channel_signal==0) Channel1.frequency=signal_frequency; else Channel2.frequency=signal_frequency; } break;casePANEL_WAVEFORM:if(event==EVENT_COMMIT){ GetCtrlVal(handle,PANEL_WAVEFORM,&waveform); if(channel_signal==0) Channel1.waveform=waveform; else Channel2.waveform=waveform;}break;}return(0);}//曲线滚动模式选择intCVICALLBACKChartMode(intpanel,intcontrol,intevent, void*callbackData,inteventData1,inteventData2){ intMode; switch(event) { caseEVENT_COMMIT: GetCtrlVal(handle,PANEL_CHART_MODE,&chartmode); switch(chartmode) { case0:Mode=VAL_SWEEP; break; case1:Mode=VAL_CONTINUOUS; break; case2:Mode=VAL_BLOCK; break; } SetCtrlAttribute(handle,PANEL_CHART,ATTR_SCROLL_MODE,Mode); break; } return0;}//退出示波器intCVICALLBACKQuit(intpanel,intcontrol,intevent, void*callbackData,inteventData1,inteventData2){ switch(event) { caseEVENT_COMMIT: QuitUserInterface(0); break; } return0;}//通道选择intCVICALLBACKSelectChannel(intpanel,intcontrol,intevent, void*callbackData,inteventData1,inteventData2){ switch(event) { caseEVENT_COMMIT: GetCtrlVal(handle,PANEL_CHANNEL,&channel); break; } return0;}//定时函数intCVICALLBACKTimer(intpanel,intcontrol,intevent, void*callbackData,inteventData1,inteventData2){ inti; switch(event) { caseEVENT_TIMER_TICK: GenerateData(); if(channel==0) PlotStripChart(handle,PANEL_CHART,Channel1.data,Channel1.pointnum,0,0,VAL_DOUBLE); if(channel==1) PlotStripChart(handle,PANEL_CHART,Channel2.data,Channel2.pointnum,0,0,VAL_DOUBLE); if(channel==2) PlotStripChart(handle,PANEL_CHART,data,Channel1.pointnum*2,0,0,VAL_DOUBLE); break; } return0;}//电源开关intCVICALLBACKPower(intpanel,intcontrol,intevent, void*callbackData,inteventData1,inteventData2){ switch(event) { caseEVENT_COMMIT: GetCtrlVal(handle,PANEL_POWER,&power); SetCtrlVal(handle,PANEL_LED,power); SetCtrlAttribute(handle,PANEL_TIMER,ATTR_ENABLED,power); if(power==0) ClearStripChart(handle,PANEL_CHART); break; } return0;}//输入信号通道选择intCVICALLBACKChannelSignal(intpanel,intcontrol,intevent, void*callbackData,inteventData1,inteventData2){ switch(event) { caseEVENT_COMMIT: GetCtrlVal(handle,PANEL_CHANNELSIGNAL,&channel_signal); if(channel_signal==0) { SetCtrlVal(handle,PANEL_FREQUENCY,Channel1.frequency); SetCtrlVal(handle,PANEL_SCOPE,Channel1.scope); SetCtrlVal(handle,PANEL_WAVEFORM,Channel1.waveform); } else { SetCtrlVal(handle,PANEL_FREQUENCY,Channel2.frequency); SetCtrlVal(handle,PANEL_SCOPE,Channel2.scope); SetCtrlVal(handle,PANEL_WAVEFORM,Channel2.waveform); } break; } return0;}//显示波形通道选择intCVICALLBACKChannel(intpanel,intcontrol,intevent, void*callbackData,inteventData1,inteventData2){ switch(event) { caseEVENT_COMMIT: GetCtrlVal(handle,PANEL_CHANNEL,&channel); if(channel==0) { SetCtrlAttribute(handle,PANEL_CHART,ATTR_NUM_TRACES,1); SetTraceAttribute(handle,PANEL_CHART,1,ATTR_TRACE_COLOR,VAL_GREEN); } if(channel==1) { SetCtrlAttribute(handle,PANEL_CHART,ATTR_NUM_TRACES,1); SetTraceAttribute(handle,PANEL_CHART,1,ATTR_TRACE_COLOR,VAL_RED); } if(channel==2) { SetCtrlAttribute(handle,PANEL_CHART,ATTR_NUM_TRACES,2); SetTraceAttribute(handle,PANEL_CHART,1,ATTR_TRACE_COLOR,VAL_GREEN); SetTraceAttribute(handle,PANEL_CHART,2,ATTR_TRACE_COLOR,VAL_RED); } break; } return0;}//记数点函数voidCalculatePointNum(){ if(channel==0) Channel1.pointnum=1024/Channel1.frequency/channel_frequency_gain; elseif(channel==1) Channel2.pointnum=1024/Channel2.frequency/channel_frequency_gain; else {//设置同样的点 Channel1.pointnum=1024/Channel1.frequency/channel_frequency_gain; Channel2.pointnum=1024/Channel1.frequency/channel_frequency_gain; }}//参数设置函数voidGenerateData(){ inti; CalculatePointNum(); switch(Channel1.waveform){case0: for(i=0;i<Channel1.pointnum/2;i++) Channel1.data[i]=Channel1.scope/channel_scope_gain; for(i=Channel1.pointnum/2;i<Channel1.pointnum;i++) Channel1.data[i]=-Channel1.scope/channel_scope_gain;break;case1: for(i=0;i<Channel1.pointnum;i++) Channel1.data[i]=sin(i*2.0*PI/Channel1.pointnum)*Channel1.scope/channel_scope_gain;break;case2:for(i=0;i<Channel1.pointnum;i++)Channel1.data[i]=((rand()/23767.0)-0.5)*Channel1.scope/channel_scope_gain;break;} switch(Channel2.waveform){case0: for(i=0;i<Channel2.pointnum/2;i++) Channel2.data[i]=Channel2.scope/channel_scope_gain; for(i=Channel2.pointnum/2;i<Channel2.pointnum;i++) Channel2.data[i]=-Channel2.scope/channel_scope_gain;break;case1:for(i=0;i<Channel2.pointnum;i++)Channel2.data[i]=sin(i*2.0*PI/Channel2.pointnum)*Channel2.scope/channel_scope_gain;break;case2:for(i=0;i<Channel2.pointnum;i++)Channel2.data[i]=((rand()/23767.0)-0.5)*Channel2.scope/channel_scope_gain;break;