Qextserial on debian linux and readyRead slot

[zamek42]

Some advance:

Is it true I need to use connect before I open the port? In terminal example does this.
I tried to this, and in open I get an error: "No such file or direcory". I tried /dev/ttyUSB0 and ttyUSB0 too.

PacketDriver::PacketDriver(const QString& cfgPrefix)
    : mFifo(cfgPrefix)
{
    mSerialPort = new QSerialPort(this);
 
    connect(mSerialPort, SIGNAL(error(QSerialPort::SerialPortError)), this, SLOT(error()));
    connect(mSerialPort, SIGNAL(readyRead()), this, SLOT(onReadyRead()));
 
    mSerialPort->setPortName("/dev/ttyUSB0");
 
    if (!mSerialPort->open(QIODevice::ReadWrite))
        log_exception(PacketDriverException, "cannot open /dev/ttyUSB0");
 
    if (!mSerialPort->setBaudRate(921600))
       log_exception(PacketDriverException, "cannot set baud 921600");
 
    if (!mSerialPort->setDataBits(QSerialPort::Data8))
       log_exception(PacketDriverException, "cannot set databits 8");
 
    if (!mSerialPort->setParity(QSerialPort::NoParity))
       log_exception(PacketDriverException, "cannot set noparity");
 
    if (!mSerialPort->setStopBits(QSerialPort::OneStop))
       log_exception(PacketDriverException, "cannot set one stopbits");
 
    if (!mSerialPort->setFlowControl(QSerialPort::NoFlowControl))
       log_exception(PacketDriverException, "cannot set noflow");
}
 
void PacketDriver::error()
{
    QString err=mSerialPort->errorString();
    std::cout<<"Error:"<<err.toStdString()<<std::endl;
}
 
void PacketDriver::onReadyRead()
{
    std::cout<<"dataAvailable";
    if (mSerialPort->bytesAvailable()) {
        QByteArray bytes = mSerialPort->readAll();
        std::cout<<", bytes:"<<bytes.length()<<std::endl;
        readChar(bytes);
    }
}

PacketDriver::PacketDriver(const QString& cfgPrefix)
    : mFifo(cfgPrefix)
{
    mSerialPort = new QSerialPort(this);

    connect(mSerialPort, SIGNAL(error(QSerialPort::SerialPortError)), this, SLOT(error()));
    connect(mSerialPort, SIGNAL(readyRead()), this, SLOT(onReadyRead()));

    mSerialPort->setPortName("/dev/ttyUSB0");

    if (!mSerialPort->open(QIODevice::ReadWrite))
        log_exception(PacketDriverException, "cannot open /dev/ttyUSB0");

    if (!mSerialPort->setBaudRate(921600))
       log_exception(PacketDriverException, "cannot set baud 921600");

    if (!mSerialPort->setDataBits(QSerialPort::Data8))
       log_exception(PacketDriverException, "cannot set databits 8");

    if (!mSerialPort->setParity(QSerialPort::NoParity))
       log_exception(PacketDriverException, "cannot set noparity");

    if (!mSerialPort->setStopBits(QSerialPort::OneStop))
       log_exception(PacketDriverException, "cannot set one stopbits");

    if (!mSerialPort->setFlowControl(QSerialPort::NoFlowControl))
       log_exception(PacketDriverException, "cannot set noflow");
}

void PacketDriver::error()
{
    QString err=mSerialPort->errorString();
    std::cout<<"Error:"<<err.toStdString()<<std::endl;
}

void PacketDriver::onReadyRead()
{
    std::cout<<"dataAvailable";
    if (mSerialPort->bytesAvailable()) {
        QByteArray bytes = mSerialPort->readAll();
        std::cout<<", bytes:"<<bytes.length()<<std::endl;
        readChar(bytes);
    }
}

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Could I debug into QtSerial?

thx
Zamek