QSerialPort crashing on QT 5.9.9

ven1ceBeach

Hello,

I am trying to write a simple application with serial connection. Somehow it crashes everytime.

I added

QT       += serialport

Header:

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QSerialPort>

QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACE

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = nullptr);
    ~MainWindow();
private slots:
    //void serialReceived();

private:
    Ui::MainWindow *ui;

    QSerialPort *serial;

};
#endif // MAINWINDOW_H

CPP:

#include "mainwindow.h"
#include "ui_mainwindow.h"

#include <QDebug>


MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);


    serial->setPortName("COM1");
    //serial->open(QSerialPort::ReadWrite);
    //serial->setBaudRate(QSerialPort::Baud115200);
    //serial->setDataBits(QSerialPort::Data8);
    //serial->setParity(QSerialPort::NoParity);
    //serial->setStopBits(QSerialPort::OneStop);
    //serial->setFlowControl(QSerialPort::NoFlowControl);
}

MainWindow::~MainWindow()
{
    delete ui;
}

As you can see I commented out a lot of code, just to show you that absolutely the simplest tries don't work.

The only error I am getting is:

23:31:58: The program has unexpectedly finished.
23:31:58: The process was ended forcefully.

Does somebody has a clue why it crashes?

INFO: The code above is shortened. There is also a TCP Server and Client running in this application but I do not think it interferes with the SerialPort. Without the SerialPort stuff the programm is running fine.

Further, uncommenting the stuff does not solve the error.

Best Wishes,
Andi

nagesh

@ven1ceBeach said in QSerialPort crashing on QT 5.9.9:

serial->setPortName("COM1");

You are using the object serial without it's creation.
create object of serial using new.

Ketan__Patel__0011

@ven1ceBeach said in QSerialPort crashing on QT 5.9.9:

serial

Please Assign Memory For You QSerialPort Object

  serial = new QSerialPort();
  serial->setPortName("COM1");
  //// Your Code ////