[开发测试]qt ModeBusTcp 测试工具

一个小工具，上次没有存又重装了系统，又得重写了一份。

.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include<QTcpServer>
#include<QTcpSocket>
QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACE

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = nullptr);
    ~MainWindow();

    QTcpServer * myserver;
    QTcpSocket * m_tcpSocket;
    QByteArray QString2Hex(QString str);
    char ConvertHexChar(char ch);
private slots:
    void newConnect();
    void readMessage();
    void on_pushButton_clicked();

private:
    Ui::MainWindow *ui;
};
#endif // MAINWINDOW_H

.cpp
#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    myserver=new QTcpServer(this);
    myserver->listen(QHostAddress::Any,9952); //监听任何连上19999端口的ip

    connect(myserver,SIGNAL(newConnection()),this,SLOT(newConnect())); //新连接信号触发，调用newConnect()槽函数，这个跟信号函数一样，其实你可以随便取。
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::newConnect()
{

    m_tcpSocket = myserver->nextPendingConnection(); //得到每个连进来的socket
    connect(m_tcpSocket,SIGNAL(readyRead()),this,SLOT(readMessage())); //有可读的信息，触发读函数槽
}


void MainWindow::readMessage() //读取信息
{
//    ui->textEdit_rec->te
    QByteArray qba= m_tcpSocket->readAll(); //读取
    while (m_tcpSocket->waitForReadyRead(10)) {
        qba+=m_tcpSocket->readAll();
    }
    qDebug()<<qba;
    QString ss=QVariant(qba).toString();
    ui->textEdit->append(qba.toHex());
}
void MainWindow::on_pushButton_clicked()
{
    QString strMesg= ui->lineEdit->text();
    ui->textEdit->append(strMesg);
    qDebug()<<strMesg;
    QByteArray tmp=QString2Hex(strMesg);
    //19 B2 00 00 00 06 01 03 00 01 00 08
    m_tcpSocket->write(tmp); //发送
}
QByteArray MainWindow::QString2Hex(QString str)
{
    QByteArray senddata;
    int hexdata,lowhexdata;
    int hexdatalen = 0;
    int len = str.length();
    senddata.resize(len/2);
    char lstr,hstr;
    for(int i=0; i<len; )
    {
        hstr=str[i].toLatin1();
        if(hstr == ' ')
        {
            i++;
            continue;
        }
        i++;
        if(i >= len)
            break;
        lstr = str[i].toLatin1();
        hexdata = ConvertHexChar(hstr);
        lowhexdata = ConvertHexChar(lstr);
        if((hexdata == 16) || (lowhexdata == 16))
            break;
        else
            hexdata = hexdata*16+lowhexdata;
        i++;
        senddata[hexdatalen] = (char)hexdata;
        hexdatalen++;
    }
    senddata.resize(hexdatalen);
    return senddata;
}

char MainWindow::ConvertHexChar(char ch)
{
    if((ch >= '0') && (ch <= '9'))
        return ch-0x30;
    else if((ch >= 'A') && (ch <= 'F'))
        return ch-'A'+10;
    else if((ch >= 'a') && (ch <= 'f'))
        return ch-'a'+10;
    else return (-1);
}