QT simple serial port assistant

Function realization ：

1. Realize serial communication with MCU

2. Automatically find serial port number

The case shows ：

 .Pro file

QT       += core gui serialport

.UI file

1 individual TextEdit Control   1 individual LineEdit 5 individual Combobox Control 2 individual Qlabel Control 3 individual PushButton Control

 Dialog.h

#include <QList>
#include <QDebug>

QT_BEGIN_NAMESPACE
namespace Ui { class Dialog; }
QT_END_NAMESPACE

class Dialog : public QDialog
{
    Q_OBJECT

public:
    Dialog(QWidget *parent = nullptr);
    ~Dialog();
public:
    bool SetSerialPortConfig(void);
private slots:
    void on_pushButton_clicked();

    void on_pushButton_2_clicked();

    void on_LineEdit2_readyRead();
    void on_pushButton_3_clicked();

private:
    Ui::Dialog *ui;
    bool m_isopen;
    QSerialPort m_serialPort;
};
#endif // DIALOG_H

Dialog.cpp（ The code has comments ）

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

Dialog::Dialog(QWidget *parent)
    : QDialog(parent)
    , ui(new Ui::Dialog)
{
    ui->setupUi(this);
    m_isopen = false;
    ui->textEdit->setReadOnly(true);
    ui->pushButton_2->setEnabled(m_isopen);
    // Find port 
    QList<QSerialPortInfo> serialPortInfo = QSerialPortInfo::availablePorts();
    for(int i =0;i<serialPortInfo.count();i++)
    {
    ui->comboBox->addItem(serialPortInfo.at(i).portName());
    }
    // Receive SCM slot function 
    connect(&m_serialPort,SIGNAL(readyRead()),this,SLOT(on_LineEdit2_readyRead()));
}

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



// Set the serial port configuration 
bool Dialog::SetSerialPortConfig(void)
{
    m_serialPort.setPortName(ui->comboBox->currentText());// Set port 
    m_serialPort.setBaudRate(ui->comboBox_2->currentText().toInt());// set baud rate 

    // Set check bit 
    if(ui->comboBox_3->currentText() == "None"){
        m_serialPort.setParity(QSerialPort::NoParity);
    }
    else if(ui->comboBox_3->currentText() == "Odd"){
        m_serialPort.setParity(QSerialPort::OddParity);
    }
    else{
        m_serialPort.setParity(QSerialPort::EvenParity);
    }
    // set data bit 
    if(ui->comboBox_4->currentText() == "8"){
        m_serialPort.setDataBits(QSerialPort::Data8);
    }
    else if(ui->comboBox_4->currentText() == "7"){
        m_serialPort.setDataBits(QSerialPort::Data7);
    }
    else if(ui->comboBox_4->currentText() == "6"){
        m_serialPort.setDataBits(QSerialPort::Data6);
    }
    else{
        m_serialPort.setDataBits(QSerialPort::Data5);
    }
    // Set stop bit 
    if(ui->comboBox_5->currentText() =="1"){
        m_serialPort.setStopBits(QSerialPort::OneStop);
    }
    else if(ui->comboBox_5->currentText() =="1.5"){
        m_serialPort.setStopBits(QSerialPort::OneAndHalfStop);
    }
    else{
        m_serialPort.setStopBits(QSerialPort::TwoStop);
    }

    m_serialPort.setFlowControl(QSerialPort::NoFlowControl);
    return m_serialPort.open(QSerialPort::ReadWrite);
}


void Dialog::on_pushButton_clicked()
{
   if(m_isopen == true)
   {
       m_serialPort.close();
       ui->pushButton->setText(" Open the port ");
       m_isopen = false;
       ui->pushButton_2->setEnabled(false);

       ui->comboBox->setEnabled(true);
       ui->comboBox_2->setEnabled(true);
       ui->comboBox_3->setEnabled(true);
       ui->comboBox_4->setEnabled(true);
       ui->comboBox_5->setEnabled(true);
   }
   else
   {
       if(true == SetSerialPortConfig() )
       {
           ui->pushButton->setText(" Close the port ");
           m_isopen = true;
           ui->pushButton_2->setEnabled(true);

          // Check whether the information is correct 
           qDebug()<<" Successful reception "<<m_serialPort.portName()<<m_serialPort.baudRate()
            <<m_serialPort.parity()<<m_serialPort.dataBits()<<m_serialPort.stopBits();

           ui->comboBox->setEnabled(false);
           ui->comboBox_2->setEnabled(false);
           ui->comboBox_3->setEnabled(false);
           ui->comboBox_4->setEnabled(false);
           ui->comboBox_5->setEnabled(false);
       }
   }
}

// Send slot function 
void Dialog::on_pushButton_2_clicked()
{
    if(m_isopen == true){
        m_serialPort.write(ui->lineEdit_2->text().toStdString().c_str());
    }
}
// Receive slot function 
void Dialog::on_LineEdit2_readyRead()
{
    if(m_isopen == true){
      ui->textEdit->insertPlainText(QString(m_serialPort.readAll()));
    }
}
// Clear the receiving end information 
void Dialog::on_pushButton_3_clicked()
{
     ui->textEdit->clear();
}