QT5 with serial debugging--use signal to receive data, automatically detect port list

Qt5 comes with a serial port initial use of the feeling is good.

Debug logging

. Pro File Added

QT       += SerialPort

. h file Added

#include<QtSerialPort/QSerialPort>

#include<QtSerialPort/QSerialPortInfo>

Private slots:    void My_readuart ();//serial port receive data slot function

Private:

    Qserialport*my_serialport;

. cpp Files

Within the constructor

    foreach (const qserialportinfo &info, Qserialportinfo::availableports ())     {    & nbsp   Qserialport serial;        Serial.setport (info);        if (Serial.open (QI Odevice::readwrite)         {            Ui->combobox->additem ( Info.portname ());            Ui->textedit->append (tr ("Port list detected:");    & nbsp       Ui->textedit->append (Info.portname ());            ui-> Textedit->append (Info.description ());            Ui->textedit->append ( Info.manufacturer ());            serial.close ();       }   }     my_serialport= New Qserialport ();    ui->pushbutton_3->setenabled (false);    Ui->combobox_2->setcurrentindex (1);//Default 9600 

Open the Serial button slot function

void mainwindow::on_pushbutton_clicked () {//    my_serialport= new Qserialport ();    My_serialport->setportname (Ui->combobox->currenttext ());    My_serialport->open (qiodevice::readwrite);    My_serialport->setbaudrate (Ui->combobox_2->currenttext (). ToInt ());    My_serialport->setdatabits (qserialport::D ata8);    My_serialport->setparity (qserialport::noparity);    My_serialport->setstopbits (qserialport::onestop);    My_serialport->setflowcontrol (Qserialport::noflowcontrol);    Connect (my_serialport,signal (Readyread ()), This,slot (My_readuart ()));    Ui->pushbutton->setenabled (false);//Disable opening the serial port button    ui->pushbutton_3->setenabled (TRUE);//Allow the serial port button to be closed}

Read the serial port slot function

void Mainwindow::my_readuart () {    Qbytearray requestData;    RequestData = My_serialport->readall ();    if (requestdata!= NULL)    {        ui->textedit->append (tr (requestData));    }    Requestdata.clear ();}

Send data slot function

void mainwindow::on_pushbutton_2_clicked () {    my_serialport->write (Ui->lineedit->text (). ToLatin1 ());}

Turn off the serial port slot function

void mainwindow::on_pushbutton_3_clicked () {    my_serialport->clear ();    Ui->pushbutton->setenabled (true);    Ui->pushbutton_3->setenabled (false);  my_serialport->deletelater ();}

When testing with 9600 baud rate, data reception is very fast and does not require the QT4 to detect whether the receive buffer has any remaining data.

QT5 with serial debugging--use signal to receive data, automatically detect port list