遇到qt串口通信的问题？？？ [复制链接]

最近在做qt的通信程序，
发现当收到的字节串中的字节最高位为1的时候，
调用网上那个QextSerialPort类的readall函数独处的字节却将最高位丢弃了（实际上QextSerialPort也是调用的QIODevice的readall接口），
不知道怎么回事！！
（注：如果用串口调试助手接受，接受到的字节串适合发送一样的，）
望高手指点！?

贴代码呢

楼主 把代码分享下啊

明天贴一下代码！谢谢大家参与

在这里将接受的字节拼装起来
---------------------------------------------------
switch(modbus_comStat)
{
    case MODBUS_COMSTAT_IDLE://ready for senting new request
            {
                extSerialPort ->readAll();
                rcvFrame.clear();
                break;
            }            
        case MODBUS_COMSTAT_REQSENT://new request has been sent, waiting for answer.
            {//discard the first received frame（because usually it can not receive the valid frame head）
                if(RTUFrmEndTmOutCount == 0)//no ever timeout, frame bytes grow -- assemble the bytes
                {
                    QByteArray temp = extSerialPort->readAll();
                    if(temp.size() <= 0) return;
                    rcvFrame.append(temp);
                    RTUFrmEndTimer->start();//restart the timer !
                    //dataWin->addItem("newbytesadded!");
                    RTUFrmEndTmOutCount = 0;
                }

/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
这里将完整的帧加以分析！
----------------------------------------------
switch(modbus_comStat)
    {
        case MODBUS_COMSTAT_IDLE://ready for senting new request
            {
                extSerialPort ->readAll();
                rcvFrame.clear();
                break;
            }            
        case MODBUS_COMSTAT_REQSENT://new request has been sent, waiting for answer.
            {//discard the first received rcvFrame（because usually it can not receive the valid frame head）
                if(chkCRC16()) //get information from frame
                {
                    if(*(rcvFrame.data()) != procConfInfo.peerDevNo) return;//undefined slaver reply -- ignore
                    //for(int i = 0;i<rcvFrame.count();i++) qDebug("index:%d----val:%d",i,*(unsigned char *)(rcvFrame.data() + i));
                    if(getInfoAndSent2Agt())
                    {
                        lastStartPrjPntIndexSent = minPrjPntIndex_ana;
                        RTUFrmEndTmOutCount = 0;
                        modbus_comStat = MODBUS_COMSTAT_IDLE;
                    }

望大家多多指导啊！

顶！！！