QT5 串口操作

Qt5 提供了两个类用于串口操作，分别是：QSerialPort和QSerialPortInfo。

最基本的操作示例代码如下：

#ifndef DIALOG_H
#define DIALOG_H

#include <QDialog>

#include <QDebug>
#include <QSerialPort>
#include <QSerialPortInfo>

namespace Ui {
class Dialog;
}

class Dialog : public QDialog
{
    Q_OBJECT

public:
    explicit Dialog(QWidget *parent = 0);
    ~Dialog();

    QSerialPort m_Serail;

private slots:
    void myRecvData();

private:
    Ui::Dialog *ui;
};

#endif // DIALOG_H

#include "dialog.h"
#include "ui_dialog.h"

Dialog::Dialog(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::Dialog)
{
    ui->setupUi(this);

    QSerialPortInfo serPortInfo;
    foreach(const QSerialPortInfo &serInfo,QSerialPortInfo::availablePorts())
    {
        qDebug() << "Name: " << serInfo.portName();
        qDebug() << "Description: " << serInfo.description();
        qDebug() << "Manufacturer: " << serInfo.manufacturer();
        qDebug() << "Serial Number: " << serInfo.serialNumber();
        qDebug() << "System Location: " << serInfo.systemLocation();
        serPortInfo = serInfo;
    }
    m_Serail.setPort(serPortInfo);
    if(m_Serail.open(QIODevice::ReadWrite))
    {
        qDebug() << "m_Serail.open(QIODevice::ReadWrite)";
        m_Serail.setBaudRate(QSerialPort::Baud115200);
        m_Serail.setParity(QSerialPort::NoParity);
        m_Serail.setDataBits(QSerialPort::Data8);
        m_Serail.setStopBits(QSerialPort::OneStop);
        m_Serail.setFlowControl(QSerialPort::NoFlowControl);

        m_Serail.clearError();
        m_Serail.clear();
        connect(&m_Serail, SIGNAL(readyRead()), this, SLOT(myRecvData()));
    }
}

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

void Dialog::myRecvData()
{
    QByteArray arr = m_Serail.readAll();
    if(NULL != arr)
    {
        ui->logEdit->append(tr(arr));
        arr.clear();
    }
}