Windows Qt 调用 visa.64.dll visa32.dll 动态调用，GPIB连接

#include "visamanager.h" #include <QDebug> VisaManager::VisaManager(const QString &add, QObject *parent) : m_add(add) , QObject(parent) { } VisaManager::~VisaManager() { close(); delete m_lib; m_lib = nullptr; } void VisaManager::setAddr(const QString &add) { m_add = add; } bool VisaManager::openDevice() { // QString libPath = "C:\\Windows\\System32\\visa32.dll"; QString libPath = "C:\\Program Files (x86)\\IVI Foundation\\VISA\\WinNT\\Bin\\visa64.dll"; m_lib = new QLibrary(this); m_lib->setFileName(libPath); if (!m_lib->load()) { qDebug() << Q_FUNC_INFO << "lib load failed! path:" << libPath; return false; } qDebug() << Q_FUNC_INFO << "lib load success!"; initFunc(); m_viStatus = f_viOpenRm(&m_viSessionRm); if (m_viStatus != VI_SUCCESS) { getVisaError(); return false; } ViRsrc addr = new char[m_add.length() + 1]; strcpy(addr, m_add.toStdString().c_str()); m_viStatus = f_viOpen(m_viSessionRm, addr, VI_NULL, VI_NULL, &m_viHandle); if (m_viStatus != VI_SUCCESS) { getVisaError(); return false; } m_viStatus = f_viSetAtt(m_viHandle, VI_ATTR_TMO_VALUE, 2000); //超时时间 if (m_viStatus != VI_SUCCESS) { getVisaError(); return false; } m_viStatus = f_viSetAtt(m_viHandle, VI_ATTR_SUPPRESS_END_EN, VI_FALSE); //不接收/n if (m_viStatus != VI_SUCCESS) { getVisaError(); return false; } m_viStatus = f_viSetAtt(m_viHandle, VI_ATTR_SEND_END_EN, VI_FALSE); //不发送/n if (m_viStatus != VI_SUCCESS) { getVisaError(); return false; } qDebug() << Q_FUNC_INFO << "Open Ddevice Success Add:" << m_add; return true; } void VisaManager::initFunc() { f_viOpenRm = (FviOpenDefaultRM)m_lib->resolve("viOpenDefaultRM"); f_viOpen = (FviOpen)m_lib->resolve("viOpen"); f_viSetAtt = (FviSetAttribute)m_lib->resolve("viSetAttribute"); f_viWrite = (FviWrite)m_lib->resolve("viWrite"); f_viRead = (FviRead)m_lib->resolve("viRead"); f_viClose = (Fviclose)m_lib->resolve("viClose"); } bool VisaManager::write(const QString &data) { ViByte wr_buff[MAX_SEND_LEN]; char send_buff[MAX_SEND_LEN]; memset(wr_buff, 0, sizeof(wr_buff)); memset(send_buff, 0, sizeof(send_buff)); strcpy(send_buff, data.toStdString().c_str()); m_viStatus = f_viWrite(m_viHandle, (ViConstBuf)send_buff, (ViUInt32)strlen(send_buff), VI_NULL); if (m_viStatus != VI_SUCCESS) { getVisaError(); return false; } qDebug() << Q_FUNC_INFO << "send success data:" << send_buff; return true; } bool VisaManager::read(QString &data) { ViPUInt32 re_count; ViByte rd_buff[MAX_SEND_LEN]; memset(rd_buff, 0, sizeof(rd_buff)); m_viStatus = f_viRead(m_viHandle, (ViBuf)rd_buff, MAX_SEND_LEN, re_count); if (m_viStatus != VI_SUCCESS) { getVisaError(); return false; } data = QString::fromLocal8Bit((char *)rd_buff); qDebug() << Q_FUNC_INFO << "read:" << data; return true; } void VisaManager::close() { f_viClose(m_viHandle); f_viClose(m_viSessionRm); } QString VisaManager::getVisaError() { QString err; switch (m_viStatus) { case VI_ERROR_ALLOC: err = "系统资源不足。"; break; case VI_ERROR_INV_SETUP: err = "配置文件无效或者不存在。"; break; case VI_ERROR_SYSTEM_ERROR: err = "VISA系统初始化失败。"; break; case VI_SUCCESS_DEV_NPRESENT: err = "连接成功。但是指定的地址无响应。"; break; case VI_WARN_CONFIG_NLOADED: err = "指定的地址不存在或者地址格式不正确。"; break; case VI_ERROR_INTF_NUM_NCONFIG: err = "指定的地址是有效的，但无法使用。"; break; case VI_ERROR_INV_ACC_MODE: err = "非法的存取模式。"; break; case VI_ERROR_INV_RSRC_NAME: err = "地址名称语法错误。"; break; case VI_ERROR_INV_SESSION: err = " "; break; // case VI_ERROR_INV_OBJECT: // err = "无效的vi。"; // break; case VI_ERROR_LIBRARY_NFOUND: err = "VISA库加载不完全。"; break; case VI_ERROR_NSUP_OPER: err = "资源管理器sesn不支持此函数。"; break; case VI_ERROR_RSRC_BUSY: err = "sesn是有效的，但当前无法访问。"; break; case VI_ERROR_RSRC_LOCKED: err = "sesn被独占。"; break; case VI_ERROR_RSRC_NFOUND: err = "信息不足或者资源不存在。"; break; case VI_ERROR_TMO: err = "操作超时."; break; case VI_WARN_NSUP_ATTR_STATE: err = "设置的属性是有效的，但不支持此属性启用。(这请求将停止，但可能会有性能改变。)"; break; case VI_ERROR_ATTR_READONLY: err = "只读属性。"; break; // case VI_ERROR_INV_SESSION: // err = ""; break; case VI_ERROR_NSUP_ATTR: err = "该资源中没有指定的属性。"; break; case VI_ERROR_NSUP_ATTR_STATE: err = "传的值不是有效值，或者该属性不支持该定义的值。(该操作将被阻止并返回错误。) "; break; // case VI_ERROR_RSRC_LOCKED: // err = "vi被上锁。"; default: break; } qDebug() << Q_FUNC_INFO << "status:" << m_viStatus << err.toStdWString().data(); return err; }