LabVIEW第5章 使用传统语言开发测控软件.ppt

5.3.2 NI Measurement Studio void CMoniDlg::OnTimer(UINT nIDEvent) { if(m_Switch.GetValue()) { m_SliderS.SetValue(rand()%100); } else { m_SliderH.SetValue((rand()%100)*1.8+32); } CDialog::OnTimer(nIDEvent); } 5.3.2 NI Measurement Studio void CMoniDlg::OnBtnStart() { // TODO: Add your control notification handler code here SetTimer(1,200,NULL); } void CMoniDlg::OnButtonStop() { // TODO: Add your control notification handler code here KillTimer(1); } 5.3.2 NI Measurement Studio 例：模拟波形输出 5.3.2 NI Measurement Studio 例：模拟波形输出 5.3.2 NI Measurement Studio 例：模拟波形输出 5.3.3 窗口中调用VISA 例：操作函数发生器Agilent 33250A波形输出 5.3.3 窗口中调用VISA void CVCTestDlg::OnBtnoutput() { // TODO: Add your control notification handler code here UpdateData(true); CString strParam=;//APPL:SQU 1000,3.0,0\n; ViStatus viSta; char buf [256] = {0}; switch(m_Type.GetCurSel()) { case 0:strcpy(buf,APPL:SIN 1000,3.0,0\n);break; case 1:strcpy(buf,APPL:SQU 2000,3.0,0\n);break; case 2:strcpy(buf,APPL:RAMP 3000,3.0,0\n);break; default:strcpy(buf,APPL:SIN 1000,3.0,0\n); } 5.3.3 窗口中调用VISA ViSession defaultRM, vi; // buf[i]APPL:RAMP 1000,3.0,0\n; /* Open session to GPIB device at address 22 */ viOpenDefaultRM(defaultRM); viSta=viOpen(defaultRM, USB0::2391::1031::M:0::INSTR,VI_NULL,VI_NULL, vi); if(viSta!=VI_SUCCESS) { AfxMessageBox(viOpen 出错！); return; } viSta=viLock(vi,VI_EXCLUSIVE_LOCK,1000,VI_NULL,VI_NULL); 5.3.3 窗口中调用VISA if(viSta!=VI_SUCCESS) { AfxMessageBox(viLock 出错！); return; } viSta=viPrintf(vi, buf); if(viSta!=VI_SUCCESS) { AfxMessageBox(viPrintf 出错！); return; } viSta=viUnlock(vi); viClose(vi); viClose(defaultRM); } * * 步骤4 注意：有的路径可能是C:\VXIPNP\WinNT\agvisa\lib\msc 步骤4 步骤4 运行程序 步骤5 添加头文件#include “visa.h” 步骤6 编写程序： #include visa.h #include stdio.h #include conio.h void main () { ViSession defaultRM, vi; char buf [256] = {0}; /* Open session to GPIB device at address 22 */ viOpenDefaultRM(defaultRM); viOpen(defaultRM, GPIB0::