串口案例

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#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QSerialPort>

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

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

private slots:
    void on_pushButton_clicked();
    void spReadyRead();

private:
    Ui::MainWindow *ui;
    QSerialPort sp;
};

#endif // MAINWINDOW_H
#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
   // sp=new QSerialPort();
    sp.setPortName("COM3");
    sp.setBaudRate(QSerialPort::Baud9600);
    sp.setDataBits(QSerialPort::Data8);
    sp.setParity(QSerialPort::NoParity);
    sp.setStopBits(QSerialPort::OneStop);

    connect(&sp,QSerialPort::readyRead,this,MainWindow::spReadyRead);

}

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

void MainWindow::on_pushButton_clicked()
{
    QString str=ui->lineEdit->text();
    if(!sp.isOpen())
    {
        sp.open(QSerialPort::ReadWrite);
    }
    sp.write(str.toLatin1());
}

void MainWindow::spReadyRead()
{
    ui->lineEdit_2->setText(sp.readAll());

}

 

posted @ 2023-11-13 23:05  blackstrom  阅读(7)  评论(0编辑  收藏  举报