1 QT       += core gui
 2 QT       += serialport
 3 
 4 greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
 5 
 6 CONFIG += c++11
 7 
 8 # The following define makes your compiler emit warnings if you use
 9 # any Qt feature that has been marked deprecated (the exact warnings
10 # depend on your compiler). Please consult the documentation of the
11 # deprecated API in order to know how to port your code away from it.
12 DEFINES += QT_DEPRECATED_WARNINGS
13 
14 # You can also make your code fail to compile if it uses deprecated APIs.
15 # In order to do so, uncomment the following line.
16 # You can also select to disable deprecated APIs only up to a certain version of Qt.
17 #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
18 
19 SOURCES += \
20     main.cpp \
21     mainwindow.cpp
22 
23 HEADERS += \
24     mainwindow.h
25 
26 FORMS += \
27     mainwindow.ui
28 
29 # Default rules for deployment.
30 qnx: target.path = /tmp/$${TARGET}/bin
31 else: unix:!android: target.path = /opt/$${TARGET}/bin
32 !isEmpty(target.path): INSTALLS += target

 1 #include "mainwindow.h"
 2 
 3 #include <QApplication>
 4 
 5 int main(int argc, char *argv[])
 6 {
 7     QApplication a(argc, argv);
 8     MainWindow w;
 9     w.show();
10     return a.exec();
11 }

 1 #ifndef MAINWINDOW_H
 2 #define MAINWINDOW_H
 3 
 4 #include <QMainWindow>
 5 #include <QMessageBox>
 6 
 7 #include <QSerialPort>        //提供访问串口的功能
 8 #include <QSerialPortInfo>    //提供系统中存在的串口的信息
 9 
10 QT_BEGIN_NAMESPACE
11 namespace Ui { class MainWindow; }
12 QT_END_NAMESPACE
13 
14 class MainWindow : public QMainWindow
15 {
16     Q_OBJECT
17 
18 public:
19     MainWindow(QWidget *parent = nullptr);
20     ~MainWindow();
21 
22 private slots:
23     void on_pushButton_2_clicked();
24 
25     void on_pushButton_clicked();
26     void on_serialPortRead();// 串口读取
27     void on_pushButton_3_clicked();
28 
29     void on_pushButton_4_clicked();
30 
31     void on_pushButton_5_clicked();
32 
33 private:
34     Ui::MainWindow *ui;
35     // 串口
36     QSerialPort *m_pSerial;
37 };
38 #endif // MAINWINDOW_H

 1 #include "mainwindow.h"
 2 #include "ui_mainwindow.h"
 3 
 4 MainWindow::MainWindow(QWidget *parent)
 5     : QMainWindow(parent)
 6     , ui(new Ui::MainWindow)
 7 {
 8     ui->setupUi(this);
 9     //串口对象
10     m_pSerial = new QSerialPort(this);
11 }
12 
13 MainWindow::~MainWindow()
14 {
15     delete ui;
16 }
17 
18 void MainWindow::on_pushButton_2_clicked()
19 {
20     ui->textEdit->clear();
21     //通过QSerialPortInfo查找可用串口
22     foreach(const QSerialPortInfo &info, QSerialPortInfo::availablePorts())
23     {
24         ui->textEdit->append(info.portName());
25     }
26 }
27 
28 void MainWindow::on_pushButton_clicked()
29 {
30     QString sCOMName = "COM%1";
31     sCOMName = sCOMName.arg(ui->lineEdit->text());
32 //    //串口对象
33 //    m_pSerial = new QSerialPort(this);
34     //设置串口名
35     m_pSerial->setPortName(sCOMName);
36     //设置波特率
37     m_pSerial->setBaudRate(115200);
38     //设置数据位数
39     m_pSerial->setDataBits(QSerialPort::Data8);
40     //设置奇偶校验
41     m_pSerial->setParity(QSerialPort::NoParity);
42     //设置停止位
43     m_pSerial->setStopBits(QSerialPort::OneStop);
44     //设置流控制
45     m_pSerial->setFlowControl(QSerialPort::NoFlowControl);
46     //打开串口
47     if(!m_pSerial->open(QIODevice::ReadWrite))
48     {
49         QMessageBox::about(NULL, "提示", "无法打开串口！");
50         return;
51     }
52     connect(m_pSerial, &QSerialPort::readyRead, this, &MainWindow::on_serialPortRead);
53 }
54 
55 void MainWindow::on_serialPortRead()
56 {
57     // 从接收缓冲区中读取数据
58     QByteArray buffer = m_pSerial->readAll();
59     // 重新显示
60     ui->textEdit_3->append(QString(buffer));
61 }
62 
63 void MainWindow::on_pushButton_3_clicked()
64 {
65     //获取界面上的数据并转换成utf8格式的字节流
66     QByteArray data = ui->textEdit_2->toPlainText().toUtf8();
67     m_pSerial->write(data);
68 }
69 
70 void MainWindow::on_pushButton_4_clicked()
71 {
72     if (m_pSerial->isOpen())
73     {
74         m_pSerial->close();
75     }
76 //    delete m_pSerial;
77 }
78 
79 void MainWindow::on_pushButton_5_clicked()
80 {
81     ui->textEdit->append(QString::number(m_pSerial->isOpen()));
82 }

  1 <?xml version="1.0" encoding="UTF-8"?>
  2 <ui version="4.0">
  3  <class>MainWindow</class>
  4  <widget class="QMainWindow" name="MainWindow">
  5   <property name="geometry">
  6    <rect>
  7     <x>0</x>
  8     <y>0</y>
  9     <width>449</width>
 10     <height>314</height>
 11    </rect>
 12   </property>
 13   <property name="windowTitle">
 14    <string>MainWindow</string>
 15   </property>
 16   <widget class="QWidget" name="centralwidget">
 17    <widget class="QPushButton" name="pushButton">
 18     <property name="geometry">
 19      <rect>
 20       <x>130</x>
 21       <y>140</y>
 22       <width>75</width>
 23       <height>23</height>
 24      </rect>
 25     </property>
 26     <property name="text">
 27      <string>打开串口</string>
 28     </property>
 29    </widget>
 30    <widget class="QPushButton" name="pushButton_2">
 31     <property name="geometry">
 32      <rect>
 33       <x>130</x>
 34       <y>20</y>
 35       <width>91</width>
 36       <height>23</height>
 37      </rect>
 38     </property>
 39     <property name="text">
 40      <string>显示所有串口</string>
 41     </property>
 42    </widget>
 43    <widget class="QPushButton" name="pushButton_3">
 44     <property name="geometry">
 45      <rect>
 46       <x>350</x>
 47       <y>190</y>
 48       <width>75</width>
 49       <height>23</height>
 50      </rect>
 51     </property>
 52     <property name="text">
 53      <string>写</string>
 54     </property>
 55    </widget>
 56    <widget class="QTextEdit" name="textEdit">
 57     <property name="geometry">
 58      <rect>
 59       <x>10</x>
 60       <y>20</y>
 61       <width>111</width>
 62       <height>111</height>
 63      </rect>
 64     </property>
 65    </widget>
 66    <widget class="QLineEdit" name="lineEdit">
 67     <property name="geometry">
 68      <rect>
 69       <x>10</x>
 70       <y>140</y>
 71       <width>111</width>
 72       <height>20</height>
 73      </rect>
 74     </property>
 75    </widget>
 76    <widget class="QTextEdit" name="textEdit_2">
 77     <property name="geometry">
 78      <rect>
 79       <x>250</x>
 80       <y>140</y>
 81       <width>181</width>
 82       <height>41</height>
 83      </rect>
 84     </property>
 85    </widget>
 86    <widget class="QTextEdit" name="textEdit_3">
 87     <property name="geometry">
 88      <rect>
 89       <x>250</x>
 90       <y>20</y>
 91       <width>181</width>
 92       <height>111</height>
 93      </rect>
 94     </property>
 95    </widget>
 96    <widget class="QLabel" name="label">
 97     <property name="geometry">
 98      <rect>
 99       <x>250</x>
100       <y>0</y>
101       <width>54</width>
102       <height>12</height>
103      </rect>
104     </property>
105     <property name="text">
106      <string>读取数据：</string>
107     </property>
108    </widget>
109    <widget class="QPushButton" name="pushButton_4">
110     <property name="geometry">
111      <rect>
112       <x>130</x>
113       <y>170</y>
114       <width>75</width>
115       <height>23</height>
116      </rect>
117     </property>
118     <property name="text">
119      <string>关闭串口中</string>
120     </property>
121    </widget>
122    <widget class="QPushButton" name="pushButton_5">
123     <property name="geometry">
124      <rect>
125       <x>130</x>
126       <y>200</y>
127       <width>75</width>
128       <height>23</height>
129      </rect>
130     </property>
131     <property name="text">
132      <string>是否打开</string>
133     </property>
134    </widget>
135   </widget>
136   <widget class="QMenuBar" name="menubar">
137    <property name="geometry">
138     <rect>
139      <x>0</x>
140      <y>0</y>
141      <width>449</width>
142      <height>23</height>
143     </rect>
144    </property>
145   </widget>
146   <widget class="QStatusBar" name="statusbar"/>
147  </widget>
148  <resources/>
149  <connections/>
150 </ui>