readAll() function of qextserialport caused segmentation fault

Beginner

Tuesday, April 3rd 2012, 9:40am

readAll() function of qextserialport caused segmentation fault

Hi,

I need some help.
I am using qexserialport. I got Segmentation fault when I received data. Why?
The segmentation fault is caused by readAll() function.

I used these
settings:

Source code

QextSerialPort*
port = new QextSerialPort("/dev/ttySAC0");

port->flush();port->setBaudRate(BAUD19200);

port->setFlowControl(FLOW_OFF);

port->setParity(PAR_NONE);

port->setStopBits(STOP_1);

port->setDataBits(DATA_8);

port->setTimeout(1000);

if (port->open(QIODevice::ReadWrite) ==
true){} else 
{ }
connect(port, SIGNAL(readyRead()), this,
SLOT(onDataAvailable()));

My function that handles signal is the next:

Source code

void myclasss:: onDataAvailable(){

QByteArray bytes=port->readAll(); //THIS CAUSES SEGMENTATION FAULT!!!!!!!!!%!!
char *data2 = bytes.data();
QString *var = new QString( data);
ui->lineEdit_2->setText(*var);

}

Thank you.
David

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fdavid777

Beginner

Posts: 9

Tuesday, April 3rd 2012, 11:10am

I used
QextSerialPort 1.2beta1 from this site
http://code.google.com/p/qextserialport/

There is a small example on their site, but the read function also causes segmentation fault.

So both of read and write cause segmentation fault. But the openning works fine.

What can be wrong? Any kind of idea would be great. :-)