serialportreader.cpp Example File | Qt Serial Port 5.6

Qt 5.6 | Qt Serial Port | Command Line Reader Async Example | serialportreader.cpp Example File

Qt 5.6.2 Reference Documentation

# serialportreader.cpp Example File

creaderasync/serialportreader.cpp

      /****************************************************************************
      **
      ** Copyright (C) 2013 Laszlo Papp <lpapp@kde.org>
      ** Contact: http://www.qt.io/licensing/
      **
      ** 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 The Qt Company. For licensing terms
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      ** information use the contact form at http://www.qt.io/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
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      ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
      **
      ** As a special exception, The Qt Company gives you certain additional
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      **
      ****************************************************************************/

      #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, &QSerialPort::readyRead, this, &SerialPortReader::handleReadyRead);
          connect(m_serialPort, static_cast<void (QSerialPort::*)(QSerialPort::SerialPortError)>(&QSerialPort::error),
                  this, &SerialPortReader::handleError);
          connect(&m_timer, &QTimer::timeout, this, &SerialPortReader::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);
          }
      }