QT5.1 串口助手（简单版）

http://blog.sina.com.cn/s/blog_6dd8f2b70101hlo1.html

//对话框程序

#include "dialog.h"

#include "ui_dialog.h"

Dialog::Dialog(QWidget *parent) :

    QDialog(parent),

    ui(new Ui::Dialog)

{

    ui->setupUi(this);

    read_port = new mythread(this);

    connect(this->read_port, SIGNAL(read_port_data()), this, SLOT(display_data()));

}

Dialog::~Dialog()

{

    //delete this->my_serialport;

    delete ui;

}

void Dialog::on_pushButton_clicked()//open serial

{

    this->read_port->start();

}

void Dialog::display_data()

{

    ui->textBrowser->setText(this->read_port->requestData);

}

//对话框程序.h

#ifndef DIALOG_H

#define DIALOG_H

#include 

#include "mythread.h"

namespace Ui {

class Dialog;

}

class Dialog : public QDialog

{

    Q_OBJECT

public:

    explicit Dialog(QWidget *parent = 0);

    ~Dialog();

private slots:

    void on_pushButton_clicked();

    void display_data();

private:

    Ui::Dialog *ui;

    mythread *read_port;

};

#endif // DIALOG_H

//关键的串口设置程序，记得要在pro里边加入QT += serialport而且必须在第一和第二的参数位置上

#include "mythread.h"

#include 

mythread::mythread(QObject *parent) :

    QThread(parent)

{

    my_serialport = new QSerialPort(this);

}

void mythread::run()

{

    this->my_serialport->setPortName("com3");

    this->my_serialport->open(QIODevice::ReadWrite);

    this->my_serialport->setBaudRate(115200);

    this->my_serialport->setDataBits(QSerialPort::Data8);

    this->my_serialport->setParity(QSerialPort::NoParity);

    this->my_serialport->setStopBits(QSerialPort::OneStop);

    this->my_serialport->setFlowControl(QSerialPort::NoFlowControl);

    while(1)

    {

        requestData = "";

        while(this->my_serialport->waitForReadyRead(10))

        {

            requestData += this->my_serialport->readAll();

        }

        if(!requestData.isEmpty())

        {

            emit(this->read_port_data());

            qDebug() << "===============" <<requestData;

        }

    }

}