C++与 Fluke5500A设备通过GPIB-USB-B通信的经验积累

1.需要安装NI-488.2.281，安装好了之后，GPIB-USB-B的驱动就自动安装好了

注意版本问题，之前安装了NI-488更高的版本，结果驱动安不上

2.在C:Program FilesIVI FoundationVISA目录下，搜索visa32.lib和visa.h、visatype.h

将库和头文件拷贝到程序目录就可以引用了

#include "visa.h"     

#pragma comment(lib, "visa32.lib")

3.常用的库函数：

/*- Resource Manager Functions and Operations -------------------------------*/

ViStatus _VI_FUNC  viOpenDefaultRM (ViPSession vi);
ViStatus _VI_FUNC  viFindRsrc      (ViSession sesn, ViConstString expr, ViPFindList vi,
                                    ViPUInt32 retCnt, ViChar _VI_FAR desc[]);
ViStatus _VI_FUNC  viFindNext      (ViFindList vi, ViChar _VI_FAR desc[]);
ViStatus _VI_FUNC  viParseRsrc     (ViSession rmSesn, ViConstRsrc rsrcName,
                                    ViPUInt16 intfType, ViPUInt16 intfNum);
ViStatus _VI_FUNC  viParseRsrcEx   (ViSession rmSesn, ViConstRsrc rsrcName, ViPUInt16 intfType,
                                    ViPUInt16 intfNum, ViChar _VI_FAR rsrcClass[],
                                    ViChar _VI_FAR expandedUnaliasedName[],
                                    ViChar _VI_FAR aliasIfExists[]);
ViStatus _VI_FUNC  viOpen          (ViSession sesn, ViConstRsrc name, ViAccessMode mode,
                                    ViUInt32 timeout, ViPSession vi);

/*- Resource Template Operations --------------------------------------------*/

ViStatus _VI_FUNC  viClose         (ViObject vi);
ViStatus _VI_FUNC  viSetAttribute  (ViObject vi, ViAttr attrName, ViAttrState attrValue);
ViStatus _VI_FUNC  viGetAttribute  (ViObject vi, ViAttr attrName, void _VI_PTR attrValue);
ViStatus _VI_FUNC  viStatusDesc    (ViObject vi, ViStatus status, ViChar _VI_FAR desc[]);
ViStatus _VI_FUNC  viTerminate     (ViObject vi, ViUInt16 degree, ViJobId jobId);

ViStatus _VI_FUNC  viLock          (ViSession vi, ViAccessMode lockType, ViUInt32 timeout,
                                    ViConstKeyId requestedKey, ViChar _VI_FAR accessKey[]);
ViStatus _VI_FUNC  viUnlock        (ViSession vi);
ViStatus _VI_FUNC  viEnableEvent   (ViSession vi, ViEventType eventType, ViUInt16 mechanism,
                                    ViEventFilter context);
ViStatus _VI_FUNC  viDisableEvent  (ViSession vi, ViEventType eventType, ViUInt16 mechanism);
ViStatus _VI_FUNC  viDiscardEvents (ViSession vi, ViEventType eventType, ViUInt16 mechanism);
ViStatus _VI_FUNC  viWaitOnEvent   (ViSession vi, ViEventType inEventType, ViUInt32 timeout,
                                    ViPEventType outEventType, ViPEvent outContext);
ViStatus _VI_FUNC  viInstallHandler(ViSession vi, ViEventType eventType, ViHndlr handler,
                                    ViAddr userHandle);
ViStatus _VI_FUNC  viUninstallHandler(ViSession vi, ViEventType eventType, ViHndlr handler,
                                      ViAddr userHandle);

/*- Basic I/O Operations ----------------------------------------------------*/

ViStatus _VI_FUNC  viRead          (ViSession vi, ViPBuf buf, ViUInt32 cnt, ViPUInt32 retCnt);
ViStatus _VI_FUNC  viReadAsync     (ViSession vi, ViPBuf buf, ViUInt32 cnt, ViPJobId  jobId);
ViStatus _VI_FUNC  viReadToFile    (ViSession vi, ViConstString filename, ViUInt32 cnt,
                                    ViPUInt32 retCnt);
ViStatus _VI_FUNC  viWrite         (ViSession vi, ViConstBuf  buf, ViUInt32 cnt, ViPUInt32 retCnt);
ViStatus _VI_FUNC  viWriteAsync    (ViSession vi, ViConstBuf  buf, ViUInt32 cnt, ViPJobId  jobId);
ViStatus _VI_FUNC  viWriteFromFile (ViSession vi, ViConstString filename, ViUInt32 cnt,
                                    ViPUInt32 retCnt);
ViStatus _VI_FUNC  viAssertTrigger (ViSession vi, ViUInt16 protocol);
ViStatus _VI_FUNC  viReadSTB       (ViSession vi, ViPUInt16 status);
ViStatus _VI_FUNC  viClear         (ViSession vi);

/*- Formatted and Buffered I/O Operations -----------------------------------*/

ViStatus _VI_FUNC  viSetBuf        (ViSession vi, ViUInt16 mask, ViUInt32 size);
ViStatus _VI_FUNC  viFlush         (ViSession vi, ViUInt16 mask);

ViStatus _VI_FUNC  viBufWrite      (ViSession vi, ViConstBuf  buf, ViUInt32 cnt, ViPUInt32 retCnt);
ViStatus _VI_FUNC  viBufRead       (ViSession vi, ViPBuf buf, ViUInt32 cnt, ViPUInt32 retCnt);

ViStatus _VI_FUNCC viPrintf        (ViSession vi, ViConstString writeFmt, ...);
ViStatus _VI_FUNC  viVPrintf       (ViSession vi, ViConstString writeFmt, ViVAList params);
ViStatus _VI_FUNCC viSPrintf       (ViSession vi, ViBuf buf, ViConstString writeFmt, ...);
ViStatus _VI_FUNC  viVSPrintf      (ViSession vi, ViBuf buf, ViConstString writeFmt,
                                    ViVAList parms);

ViStatus _VI_FUNCC viScanf         (ViSession vi, ViConstString readFmt, ...);
ViStatus _VI_FUNC  viVScanf        (ViSession vi, ViConstString readFmt, ViVAList params);
ViStatus _VI_FUNCC viSScanf        (ViSession vi, ViConstBuf buf, ViConstString readFmt, ...);
ViStatus _VI_FUNC  viVSScanf       (ViSession vi, ViConstBuf buf, ViConstString readFmt,
                                    ViVAList parms);

ViStatus _VI_FUNCC viQueryf        (ViSession vi, ViConstString writeFmt, ViConstString readFmt, ...);
ViStatus _VI_FUNC  viVQueryf       (ViSession vi, ViConstString writeFmt, ViConstString readFmt,

具体怎么调用百度可以搜到例程

安装NI-488以后也会安装例程

我的代码：

void c_gbip_demo_dlg::on_bn_clicked_conn()
{
    ViStatus error = viOpenDefaultRM(&m_vi_session_rm);
    if (error != VI_SUCCESS) 
    {
        return;
    }

    error == viOpen(m_vi_session_rm, "GPIB0::4::INSTR", VI_EXCLUSIVE_LOCK, VI_NULL, &m_vi_session);
    if (error== VI_SUCCESS)
    {
        char receiveBufferArrary[256] = { 0 };
        viPrintf(m_vi_session, "*RST
");                        //发送复位命令
        error = viPrintf(m_vi_session, "*IDN?
");               //发送读取设备信息命令
        viScanf(m_vi_session, "%t", &receiveBufferArrary);
        UpdateData(FALSE);
    }
    else
    {
        //MessageBox("连接设备失败！", "提示", MB_OK | MB_ICONWARNING);
    }
    return ;
}

注意，viOpen的第二个参数我写的GPIB0::4::INSTR。这个参数，可以打开VISA Interactive Control查看到：

viOpen调用成功后，就连接成功了，之后就是命令发送、接收的问题了

4.具体命令的写法，要依据具体设备的程序员手册来确定。