QT网络和串口

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从网络接收数据，发送到串口，然后串口返回数据发送到网络。
基本布局如下，串口名写在lineedit中，Send请自行忽略。

具体代码如下：
#include "mainwindow.h"#include "ui_mainwindow.h"MainWindow::MainWindow(QWidget *parent) :    QMainWindow(parent),    ui(new Ui::MainWindow){    ui->setupUi(this);    m_status = false;    this->setFixedSize(652,337);    this->setWindowTitle(tr("Three"));    m_port = 8878;    m_pServerIP = new QHostAddress();    m_pserialPort = new QSerialPort();    m_pTcpServer = new QTcpServer(this);    if(!m_pTcpServer->listen(QHostAddress::Any,m_port))    {        QMessageBox::information(this,tr("error"),tr("listenerror!"));        return;    }    else    {        connect(m_pTcpServer, SIGNAL(newConnection()), this, SLOT(sendMessages()));    }    connect(m_pserialPort,SIGNAL(readyRead()),this,SLOT(updateData()));    ui->pushButtonSend->setEnabled(false);    return;}MainWindow::~MainWindow(){    delete ui;}void MainWindow::on_pushButtonOpenPort_clicked(){    if(ui->pushButtonOpenPort->text()=="OpenPort")    {        m_pserialPort->setPortName(ui->lineEdit->text());        m_pserialPort->setBaudRate(QSerialPort::Baud115200,QSerialPort::AllDirections);        m_pserialPort->setDataBits(QSerialPort::Data8);     //数据位为8位        m_pserialPort->setFlowControl(QSerialPort::NoFlowControl);//无流控制        m_pserialPort->setParity(QSerialPort::NoParity);    //无校验位        m_pserialPort->setStopBits(QSerialPort::OneStop);   //一位停止位        m_pserialPort->close();                 //先关串口，再打开，可以保证串口不被其它函数占用。        if(m_pserialPort->open(QIODevice::ReadWrite))       //以可读写的方式打开串口        {            connect(m_pserialPort,SIGNAL(readyRead()),this,SLOT(read_Com()));            ui->pushButtonOpenPort->setText("ClosePort");        }        else        {            QMessageBox::information(this,tr("error"),tr("com name error!"));            return;        }    }    else    {        ui->pushButtonOpenPort->setText("OpenPort");        m_pserialPort->close();    }    return;}void MainWindow::sendMessages(){    m_pTcpSocket = m_pTcpServer->nextPendingConnection();    connect(m_pTcpSocket,SIGNAL(readyRead()),this,SLOT(dealMessage()));}void MainWindow::dealMessage(){//receive from network and send to serialport    QString str="";    QByteArray datagram;    char *data="";    while(m_pTcpSocket->bytesAvailable()>0)    {        datagram.resize(m_pTcpSocket->bytesAvailable());        m_pTcpSocket->read(datagram.data(),datagram.size());        data=datagram.data();        str = QString::fromUtf8(data);        ui->recvTextBrowser->append(str);    }    m_pserialPort->write(data);    return;}void MainWindow::updateData(){//receieve from serialport and send to network    QByteArray requestData = m_pserialPort->readAll();    QString str = "";    if(requestData.size()>0)    {        str = requestData.data();        ui->sendTextBrowser->append(str);    }    m_pTcpSocket->write(str.toLatin1());    //sentToNetwork    return;}void MainWindow::on_pushButton_clicked(){    ui->recvTextBrowser->clear();}void MainWindow::on_pushButton_2_clicked(){    ui->sendTextBrowser->clear();}
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