周立功USB接口VCI_opendivice返回值为0

sunlianghong

用QT调用.DLL文件，调试ZLG USB CAN卡是VCI_OpenDevice 时返回值一直为0，调用段代码

devtype=21;
    devind=0;
    res=0;
    if(pOpenDevice(devtype,devind,res)==STATUS_ERR )
    {
        qDebug()<<"3";
        qDebug()<<"status_err"<<STATUS_ERR;

        if(pReadErrInfoCAN(devtype,devind,canind,&vei)!=STATUS_ERR)
        {
           qDebug()<<"Open failed"<<QString::number(vei.ErrCode,16);

        }else
            qDebug()<<"error";
        return;
    }else
        qDebug()<<"open successed";

加载库段代码如下：

devtype=21;//设备类型USBCAN 2EU
    devind=0;//设备索引号
    res=0;//系统保留位，一般为0
    canind=0;//CAN通道0
    reftype=0;//参数类型
    bool ok;

    VCI_ERR_INFO vei;
    VCI_CAN_OBJ preceive[100];
    VCI_CAN_OBJ psend;
    int baud=0x10000000;
    
    QLibrary lib("usbcan.dll");
    if(true==lib.load())
    {

        pOpenDevice = (VCI_OpenDevice *)lib.resolve("VCI_OpenDevice");//是不能直接使用VCI_InitCAN函数的，必须导出
        pCloseDevice = (VCI_CloseDevice *)lib.resolve("VCI_CloseDevice");
        pInitCAN = (VCI_InitCAN *)lib.resolve("VCI_InitCAN");
        pStartCAN = (VCI_StartCAN *)lib.resolve("VCI_StartCAN");
        pTransmitCAN = (VCI_Transmit *)lib.resolve("VCI_Transmit");
        pReceive = (VCI_Receive *)lib.resolve("VCI_Receive");
        pGetReceiveNum = (VCI_GetReceiveNum *)lib.resolve("VCI_GetReceiveNum");
        pClearBuffer = (VCI_ClearBuffer *)lib.resolve("VCI_ClearBuffer");
        pReadErrInfoCAN = (VCI_ReadErrInfo*)lib.resolve("VCI_ReadErrInfo");
        pResetCAN=(VCI_ResetCAN *)lib.resolve("VCI_ResetCAN");
        pSetReference=(VCI_SetReference *)lib.resolve("VCI_SetReference");
        pReadBoardInfo=(VCI_ReadBoardInfo *)lib.resolve("VCI_ReadBoardInfo");
        pReadCANStatus=(VCI_ReadCANStatus *)lib.resolve("VCI_ReadCANStatus");
        qDebug()<<"usbcan.dll load ok";
    }

    else
        qDebug()<<"usbcan.dll load failed";