send binary file over serial port with QSerialDevice

[ilpaso]

thank you marcvanriet,
you have understood all my problems!
I do not understand why a class for serial communication is not ready to manage the xon/xoff flow control (or other flow control) in a easy way and so I think I'm not able to use it.
I'll try to send the file in smaller partitions. This is a good idea!

This is my code:
I set the Xon/Xoff:

if (!port->setFlowControl(AbstractSerial::FlowControlXonXoff)) {
        qDebug() << "Set flow " <<  AbstractSerial::FlowControlXonXoff << " error.";
        return;
    }

if (!port->setFlowControl(AbstractSerial::FlowControlXonXoff)) {
        qDebug() << "Set flow " <<  AbstractSerial::FlowControlXonXoff << " error.";
        return;
    }

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.....
inside the function "writeBinaryFile(QString fileName)" I send the datas

{ 
    QFile file(fileName);
    if (!file.open(QIODevice::ReadOnly)){
        qDebug() << "Open file fault";
        start(false);
        port->close();
        return;
    }
    QByteArray data = file.readAll();
    quint64 r = port->write(data);
    port->waitForBytesWritten(responseTimeout);
    port->waitForReadyRead(responseTimeout);
    cout<<r<<endl;
    if (r == quint64(data.size())) qDebug() << "Writed text file.";
    else qDebug() << "Bytes writed small: " << r;
}

{ 
    QFile file(fileName);
    if (!file.open(QIODevice::ReadOnly)){
        qDebug() << "Open file fault";
        start(false);
        port->close();
        return;
    }
    QByteArray data = file.readAll();
    quint64 r = port->write(data);
    port->waitForBytesWritten(responseTimeout);
    port->waitForReadyRead(responseTimeout);
    cout<<r<<endl;
    if (r == quint64(data.size())) qDebug() << "Writed text file.";
    else qDebug() << "Bytes writed small: " << r;
}

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when I send a small text file all is ok. When I send a bigger binary file (32KByte) printer returns only 7Kbyte read.

regards
ilpaso