QT uses serialport to realize the reception of serial devices (the environment is qt5 under windows)

The implementation process of serialport serial port class is as follows:

First: we need to add a sentence QT += serialport to the project file pro file

          Then add #include <QtSerialPort/QSerialPort> in the header file 

                                              #include <QtSerialPort/QSerialPortInfo>

Second: Configure the serial port parameter function. What I wrote here is 8-bit data, no parity, one stop bit, 9600 baud rate, and these configurations can be changed according to your own needs.

intMainWindow::open(QStringcomPort)  

{

    this->com = comPort;

    // serial port parameter settings

    serial  = new QSerialPort ();  

    serial ->setPortName( com ); //Set the serial port name

    if(!serial->open(QIODevice::ReadWrite)) 

    {

       qDebug("openserialerror!");  

       return -1;

    }

    else

    {

        qDebug("openserialok");  

    }

    serial ->setBaudRate( QSerialPort :: Baud9600 ); //9600 baud rate

    serial ->setDataBits( QSerialPort :: Data8 ); //8 data bits

    serial ->setParity( QSerialPort :: EvenParity ); //check  

    serial ->setStopBits( QSerialPort :: OneStop  ); //1 stop bit

    serial->setFlowControl(QSerialPort::NoFlowControl);

    return0; 

}

Third: write data only one line can write data 

serial ->write( ) This write prototype is like this write( const char *data, qint64 len);    

Fourth: read data   

QByteArraybuf=serial->readAll();    

Fifth: close the serial port

serial->close();

The above serial I defined in the header file is QSerialport *serial.

The serialport class in QT is very easy to use. It is ok to configure the read, write and close of the serial port. Code address https://download.csdn.net/download/weixin_39770778/10326200