Qt5使用自带的类实现自动识别串口代码。

.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include 
#include 
#include 
namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = nullptr);
    ~MainWindow();
    void Read_Serial_Connect_Success();
    void Timer0_Init();
    QTimer *myTime;
    void Serial_Connect_Success_Label_Text();
    void Serial_Connect_NG_Label_Text();

private slots:
    void Timer0_Task();


private:
    Ui::MainWindow *ui;
};

#endif // MAINWINDOW_H

 

.c
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include 
#include 
#include 
#include 

using namespace std;

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    Timer0_Init();
    //设置标题栏
    MainWindow::setWindowTitle(tr("自动识别串口连接Demo"));
    //设置窗口为白色
    QPalette palette(this->palette());
    palette.setColor(QPalette::Background, Qt::white);
    this->setPalette(palette);
}

MainWindow::~MainWindow()
{
    delete ui;
}
void MainWindow::Timer0_Init()
{
    myTime = new QTimer();
    myTime->stop();
    myTime->setInterval(500);//1ms定时器，类似于单片机的中断函数
    connect(myTime,SIGNAL(timeout()),this,SLOT(Timer0_Task()));
    myTime->start();
}
//串口自动识别部分
static int Read_Serial_Port_Info()
{
    const QString Read_Serial_Port_Info_Buff = "USB-SERIAL CH340";
    foreach (const QSerialPortInfo &info, QSerialPortInfo::availablePorts())
    {
        qDebug() << "Name : " << info.portName();
        qDebug() << "Description :"<label->setText("串口已经连接");
        QPalette pe;
        pe.setColor(QPalette::WindowText,Qt::red);
        ui->label->setPalette(pe);
}

void MainWindow::Serial_Connect_NG_Label_Text()
{
        ui->label->setText("串口等待连接");
        QPalette pe;
        pe.setColor(QPalette::WindowText,Qt::black);
        ui->label->setPalette(pe);
}

如果有问题欢迎询问。