Qt5串口类QSerialPort的实现

QT += serialport

#include <QCoreApplication>
#include <QDebug>
 
#include <QSerialPort>
#include <QSerialPortInfo>
 
int main(int arGC, char *argv[])
{
    QCoreApplication a(argc, argv);
    foreach (const QSerialPortInfo &info, QSerialPortInfo::availablePorts())
    {
        qDebug() << "Name : " << info.portName();
        qDebug() << "Description : " << info.description();
        qDebug() << "Manufacturer: " << info.manufacturer();
        qDebug() << "Serial Number: " << info.serialNumber();
        qDebug() << "System Location: " << info.systemLocation();
    }
    return a.exec();
}

#include <QCoreApplication>
#include <QDebug>
#include <QSerialPort>
#include <QSerialPortInfo>
 
int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    QSerialPortInfo com_info;
    foreach (const QSerialPortInfo &info, QSerialPortInfo::availablePorts())
    {
        if( info.serialNumber() == "A400G3UXA" )
        {
            com_info = info;
            break;
        }
    }
    qDebug() << "Name : " << com_info.portName();
    qDebug() << "Description : " << com_info.description();
    qDebug() << "serialNumber: " << com_info.serialNumber();
    return a.exec();
}

class MySerial : public QObject
{
    Q_OBJECT
public:
    MySerial(QString portName = "ttyUSB1", QObject *parent = nullptr);
    ~MySerial();
    bool WriteToSerial(QByteArray cmd);
    QByteArray ReadFromSerial();
    bool SerialIsOpen() { return m_SerialPort->isOpen(); }
    void closeSerial();
signals:
    void sig_SendTipInfo(bool result, QString info);
    void sig_SendReadData(QByteArray data);
 
private:
    QSerialPort *m_SerialPort = nullptr;
};

MySerial::MySerial(QString portName, QObject *parent) :
    QObject(parent)
{
    m_SerialPort = new QSerialPort();
    m_SerialPort->setPortName(portName);                //设置串行端口的名称
    m_SerialPort->setBaudRate(QSerialPort::Baud115200); //波特率：115200 bps
    m_SerialPort->setDataBits(QSerialPort::Data8);      //数据位：8 位
    m_SerialPort->setStopBits(QSerialPort::OneStop);    //停止位：1 位
    m_SerialPort->setParity(QSerialPort::NoParity);     //校验位：无
    m_SerialPort->setFlowControl(QSerialPort::NoFlowControl);
    qDebug() << "Port Name:" << portName;
    if(!m_SerialPort->open(QIODevice::ReadWrite))
    {
        emit sig_SendTipInfo(false, "opened failed");
        qDebug() << "open failed";
    }
    else qDebug() << "open successfully";
}
 
MySerial::~MySerial()
{
    m_SerialPort->clear();    //丢弃缓冲区中的所有字符， 同时终止挂起的读取或写入操作
    m_SerialPort->close();
    m_SerialPort->deleteLater();
}
 
bool MySerial::WriteToSerial(QByteArray cmd)
{
    if(cmd.isEmpty()) return false;
//    qDebug() << "[ == MySerial == ] Send Data:" << cmd.toHex();
    this->m_SerialPort->clear();
    this->m_SerialPort->write(cmd);
    this->m_SerialPort->flush();    //尽可能多地从内部写缓冲区写入底层串口而不阻塞
    this->m_SerialPort->waitForBytesWritten(10);
    return true;
}
 
QByteArray MySerial::ReadFromSerial()
{
    QByteArray readData;
    this->m_SerialPort->waitForReadyRead(5);
    readData.append(this->m_SerialPort->readAll());
    while (this->m_SerialPort->waitForReadyRead(5)) readData.append(this->m_SerialPort->readAll());
    if(readData.isEmpty()) return QByteArray();
//    qDebug() << "[ == MySerial == ] Read Data:" << readData.toHex();
    return readData;
}
 
void MySerial::closeSerial()
{
    if(!m_SerialPort->isOpen()) return;
    m_SerialPort->clear();
    m_SerialPort->close();
}