[SOLVED] How to work with the Serial Port in Qt

8Observer8

I delete the m_sender object here:
[CODE]
MainWindow::~MainWindow()
{
delete ui;
delete m_sender;
}
[/CODE]

8Observer8

The main problem: my application crash when I call .isOpen() Method. Why? Who can say the reason?

[CODE]
void Sender::send( const QByteArray &data ) throw( PortError )
{
if ( !m_port.isOpen() ) {
throw PortError( m_port.errorString().toStdString() );
}

// Write data to the port
if ( m_port.write( data ) == -1 ) {
    throw PortError( m_port.errorString().toStdString() );
}

}[/CODE]

P.S. You see that it is very simple application

SGaist

Hi,

Please run your application using a debugger, it will tell you exactly where the code is crashing

8Observer8

I've written. Here: "if ( !m_port.isOpen() )" in my last post. And I see this message:
http://i6.pixs.ru/storage/4/6/9/288png_9391611_13540469.png

SGaist

Indeed, but running with the debugger, it will show you the stack trace and that would be more useful to help finding where the problem is.

8Observer8

I was helped here: [url]http://www.prog.org.ru/index.php?topic=27520[/url]

The error on this line "m_port( portName ),"
[CODE]
Sender::Sender( const QString &portName,
QSerialPort::BaudRate baudRate,
QSerialPort::DataBits dataBits,
QSerialPort::Parity parity,
QSerialPort::StopBits stopBits,
QSerialPort::FlowControl flowControl ) :
m_port( portName ),
m_baudRate( baudRate ),
m_dataBits( dataBits ),
m_parity( parity ),
m_stopBits( stopBits ),
m_flowControl( flowControl )
{
// Set the port name
m_port.setPortName( m_portName );[/CODE]

I should have written m_portName instead m_port.

I replaced "QSerialPort m_port;" on "QSerialPort m_serialPort;" And I delete the m_portName because I can to write m_serialPort( portName ) in the "Sender" constructor.

It is my project: [url]https://github.com/8Observer8/ComPort[/url]

SGaist

Since you are using exceptions, please take a look at the corresponding chapter in Qt's documentation.

8Observer8

Please, show me what do you mean? Cannot I use exceptions?

SGaist

Yes, you can, but there are some rules. Read "this":http://qt-project.org/doc/qt-5/exceptionsafety.html

8Observer8

Thank you very much! :)