serialportwriter.cpp Example File

  /****************************************************************************
  **
  ** Copyright (C) 2013 Laszlo Papp <lpapp@kde.org>
  ** Contact: https://www.qt.io/licensing/
  **
  ** This file is part of the QtSerialPort module of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:BSD$
  ** 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 The Qt Company. For licensing terms
  ** and conditions see https://www.qt.io/terms-conditions. For further
  ** information use the contact form at https://www.qt.io/contact-us.
  **
  ** BSD License Usage
  ** Alternatively, you may use this file under the terms of the BSD license
  ** as follows:
  **
  ** "Redistribution and use in source and binary forms, with or without
  ** modification, are permitted provided that the following conditions are
  ** met:
  **   * Redistributions of source code must retain the above copyright
  **     notice, this list of conditions and the following disclaimer.
  **   * Redistributions in binary form must reproduce the above copyright
  **     notice, this list of conditions and the following disclaimer in
  **     the documentation and/or other materials provided with the
  **     distribution.
  **   * Neither the name of The Qt Company Ltd nor the names of its
  **     contributors may be used to endorse or promote products derived
  **     from this software without specific prior written permission.
  **
  **
  ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
  **
  ** $QT_END_LICENSE$
  **
  ****************************************************************************/

  #include "serialportwriter.h"

  #include <QCoreApplication>

  QT_USE_NAMESPACE

  SerialPortWriter::SerialPortWriter(QSerialPort *serialPort, QObject *parent)
      : QObject(parent)
      , m_serialPort(serialPort)
      , m_standardOutput(stdout)
      , m_bytesWritten(0)
  {
      m_timer.setSingleShot(true);
      connect(m_serialPort, &QSerialPort::bytesWritten, this, &SerialPortWriter::handleBytesWritten);
      connect(m_serialPort, static_cast<void (QSerialPort::*)(QSerialPort::SerialPortError)>(&QSerialPort::error),
              this, &SerialPortWriter::handleError);
      connect(&m_timer, &QTimer::timeout, this, &SerialPortWriter::handleTimeout);
  }

  SerialPortWriter::~SerialPortWriter()
  {
  }

  void SerialPortWriter::handleBytesWritten(qint64 bytes)
  {
      m_bytesWritten += bytes;
      if (m_bytesWritten == m_writeData.size()) {
          m_bytesWritten = 0;
          m_standardOutput << QObject::tr("Data successfully sent to port %1").arg(m_serialPort->portName()) << endl;
          QCoreApplication::quit();
      }
  }

  void SerialPortWriter::handleTimeout()
  {
      m_standardOutput << QObject::tr("Operation timed out for port %1, error: %2").arg(m_serialPort->portName()).arg(m_serialPort->errorString()) << endl;
      QCoreApplication::exit(1);
  }

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

  void SerialPortWriter::write(const QByteArray &writeData)
  {
      m_writeData = writeData;

      qint64 bytesWritten = m_serialPort->write(writeData);

      if (bytesWritten == -1) {
          m_standardOutput << QObject::tr("Failed to write the data to port %1, error: %2").arg(m_serialPort->portName()).arg(m_serialPort->errorString()) << endl;
          QCoreApplication::exit(1);
      } else if (bytesWritten != m_writeData.size()) {
          m_standardOutput << QObject::tr("Failed to write all the data to port %1, error: %2").arg(m_serialPort->portName()).arg(m_serialPort->errorString()) << endl;
          QCoreApplication::exit(1);
      }

      m_timer.start(5000);
  }