Qt5自带串口调试 --使用signal接收数据，自动侦测端口列表

Qt5自带串口初步用一下感觉还不错。

调试记录

.pro文件增加

QT       += serialport

.h文件增加

#include <QtSerialPort/QSerialPort>

#include <QtSerialPort/QSerialPortInfo>

private slots:
    void my_readuart();//串口接收数据槽函数

private:

    QSerialPort *my_serialport;

.cpp文件

构造函数内

    foreach (const QSerialPortInfo &info, QSerialPortInfo::availablePorts())
    {
        QSerialPort serial;
        serial.setPort(info);
        if (serial.open(QIODevice::ReadWrite))
        {
            ui->comboBox->addItem(info.portName());
            ui->textEdit->append(tr("检测到端口列表:"));
            ui->textEdit->append(info.portName());
            ui->textEdit->append(info.description());
            ui->textEdit->append(info.manufacturer());
            serial.close();
        }
    }
    my_serialport= new QSerialPort();
    ui->pushButton_3->setEnabled(false);
    ui->comboBox_2->setCurrentIndex(1);//默认9600

void MainWindow::on_pushButton_clicked()
{
//    my_serialport= new QSerialPort();
    my_serialport->setPortName(ui->comboBox->currentText());
    my_serialport->open(QIODevice::ReadWrite);
    my_serialport->setBaudRate(ui->comboBox_2->currentText().toInt());
    my_serialport->setDataBits(QSerialPort::Data8);
    my_serialport->setParity(QSerialPort::NoParity);
    my_serialport->setStopBits(QSerialPort::OneStop);
    my_serialport->setFlowControl(QSerialPort::NoFlowControl);
    connect(my_serialport,SIGNAL(readyRead()),this,SLOT(my_readuart()));
    ui->pushButton->setEnabled(false);//禁止打开串口按钮
    ui->pushButton_3->setEnabled(true);//允许关闭串口按钮
}

void MainWindow::my_readuart()
{
    QByteArray requestData;
    requestData = my_serialport->readAll();
    if(requestData!= NULL)
    {
        ui->textEdit->append(tr(requestData));
    }
    requestData.clear();
}

void MainWindow::on_pushButton_2_clicked()
{
    my_serialport->write(ui->lineEdit->text().toLatin1());
}

void MainWindow::on_pushButton_3_clicked()
{
    my_serialport->clear();
    ui->pushButton->setEnabled(true);
    ui->pushButton_3->setEnabled(false);
    //  my_serialport->deleteLater();
}

原文：http://blog.csdn.net/yh_1988/article/details/41803135