QT5 串口操作

Posted 2020-06-18 91program

Qt5 提供了两个类用于串口操作，分别是：QSerialPort和QSerialPortInfo。

最基本的操作示例代码如下：

 1 #ifndef DIALOG_H
 2 #define DIALOG_H
 3 
 4 #include <QDialog>
 5 
 6 #include <QDebug>
 7 #include <QSerialPort>
 8 #include <QSerialPortInfo>
 9 
10 namespace Ui {
11 class Dialog;
12 }
13 
14 class Dialog : public QDialog
15 {
16     Q_OBJECT
17 
18 public:
19     explicit Dialog(QWidget *parent = 0);
20     ~Dialog();
21 
22     QSerialPort m_Serail;
23 
24 private slots:
25     void myRecvData();
26 
27 private:
28     Ui::Dialog *ui;
29 };
30 
31 #endif // DIALOG_H

 

 1 #include "dialog.h"
 2 #include "ui_dialog.h"
 3 
 4 Dialog::Dialog(QWidget *parent) :
 5     QDialog(parent),
 6     ui(new Ui::Dialog)
 7 {
 8     ui->setupUi(this);
 9 
10     QSerialPortInfo serPortInfo;
11     foreach(const QSerialPortInfo &serInfo,QSerialPortInfo::availablePorts())
12     {
13         qDebug() << "Name: " << serInfo.portName();
14         qDebug() << "Description: " << serInfo.description();
15         qDebug() << "Manufacturer: " << serInfo.manufacturer();
16         qDebug() << "Serial Number: " << serInfo.serialNumber();
17         qDebug() << "System Location: " << serInfo.systemLocation();
18         serPortInfo = serInfo;
19     }
20     m_Serail.setPort(serPortInfo);
21     if(m_Serail.open(QIODevice::ReadWrite))
22     {
23         qDebug() << "m_Serail.open(QIODevice::ReadWrite)";
24         m_Serail.setBaudRate(QSerialPort::Baud115200);
25         m_Serail.setParity(QSerialPort::NoParity);
26         m_Serail.setDataBits(QSerialPort::Data8);
27         m_Serail.setStopBits(QSerialPort::OneStop);
28         m_Serail.setFlowControl(QSerialPort::NoFlowControl);
29 
30         m_Serail.clearError();
31         m_Serail.clear();
32         connect(&m_Serail, SIGNAL(readyRead()), this, SLOT(myRecvData()));
33     }
34 }
35 
36 Dialog::~Dialog()
37 {
38     delete ui;
39 }
40 
41 void Dialog::myRecvData()
42 {
43     QByteArray arr = m_Serail.readAll();
44     if(NULL != arr)
45     {
46         ui->logEdit->append(tr(arr));
47         arr.clear();
48     }
49 }