serialportreader.cpp Example File | Qt Serial Port 5.4

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# serialportreader.cpp Example File

creaderasync/serialportreader.cpp

    /****************************************************************************
    **
    ** Copyright (C) 2013 Laszlo Papp <lpapp@kde.org>
    ** Contact: http://www.qt-project.org/legal
    **
    ** This file is part of the QtSerialPort module of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:LGPL21$
    ** Commercial License Usage
    ** Licensees holding valid commercial Qt licenses may use this file in
    ** accordance with the commercial license agreement provided with the
    ** Software or, alternatively, in accordance with the terms contained in
    ** a written agreement between you and Digia. For licensing terms and
    ** conditions see http://qt.digia.com/licensing. For further information
    ** use the contact form at http://qt.digia.com/contact-us.
    **
    ** GNU Lesser General Public License Usage
    ** Alternatively, this file may be used under the terms of the GNU Lesser
    ** General Public License version 2.1 or version 3 as published by the Free
    ** Software Foundation and appearing in the file LICENSE.LGPLv21 and
    ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
    ** following information to ensure the GNU Lesser General Public License
    ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
    ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
    **
    ** In addition, as a special exception, Digia gives you certain additional
    ** rights. These rights are described in the Digia Qt LGPL Exception
    ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
    **
    ** $QT_END_LICENSE$
    **
    ****************************************************************************/

    #include "serialportreader.h"

    #include <QCoreApplication>

    QT_USE_NAMESPACE

    SerialPortReader::SerialPortReader(QSerialPort *serialPort, QObject *parent)
        : QObject(parent)
        , m_serialPort(serialPort)
        , m_standardOutput(stdout)
    {
        connect(m_serialPort, SIGNAL(readyRead()), SLOT(handleReadyRead()));
        connect(m_serialPort, SIGNAL(error(QSerialPort::SerialPortError)), SLOT(handleError(QSerialPort::SerialPortError)));
        connect(&m_timer, SIGNAL(timeout()), SLOT(handleTimeout()));

        m_timer.start(5000);
    }

    SerialPortReader::~SerialPortReader()
    {
    }

    void SerialPortReader::handleReadyRead()
    {
        m_readData.append(m_serialPort->readAll());

        if (!m_timer.isActive())
            m_timer.start(5000);
    }

    void SerialPortReader::handleTimeout()
    {
        if (m_readData.isEmpty()) {
            m_standardOutput << QObject::tr("No data was currently available for reading from port %1").arg(m_serialPort->portName()) << endl;
        } else {
            m_standardOutput << QObject::tr("Data successfully received from port %1").arg(m_serialPort->portName()) << endl;
            m_standardOutput << m_readData << endl;
        }

        QCoreApplication::quit();
    }

    void SerialPortReader::handleError(QSerialPort::SerialPortError serialPortError)
    {
        if (serialPortError == QSerialPort::ReadError) {
            m_standardOutput << QObject::tr("An I/O error occurred while reading the data from port %1, error: %2").arg(m_serialPort->portName()).arg(m_serialPort->errorString()) << endl;
            QCoreApplication::exit(1);
        }
    }