main.cpp Example File

cwriterasync/main.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
  ** and conditions see http://www.qt.io/terms-conditions. For further
  ** 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
  ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
  ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
  **
  ** As a special exception, The Qt Company gives you certain additional
  ** rights. These rights are described in The Qt Company LGPL Exception
  ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
  **
  ** $QT_END_LICENSE$
  **
  ****************************************************************************/

  #include "serialportwriter.h"

  #include <QtSerialPort/QSerialPort>

  #include <QTextStream>
  #include <QCoreApplication>
  #include <QFile>
  #include <QStringList>

  QT_USE_NAMESPACE

  int main(int argc, char *argv[])
  {
      QCoreApplication coreApplication(argc, argv);
      int argumentCount = QCoreApplication::arguments().size();
      QStringList argumentList = QCoreApplication::arguments();

      QTextStream standardOutput(stdout);

      if (argumentCount == 1) {
          standardOutput << QObject::tr("Usage: %1 <serialportname> [baudrate]").arg(argumentList.first()) << endl;
          return 1;
      }

      QSerialPort serialPort;
      QString serialPortName = argumentList.at(1);
      serialPort.setPortName(serialPortName);

      int serialPortBaudRate = (argumentCount > 2) ? argumentList.at(2).toInt() : QSerialPort::Baud9600;
      serialPort.setBaudRate(serialPortBaudRate);

      serialPort.open(QIODevice::WriteOnly);

      QFile dataFile;
      if (!dataFile.open(stdin, QIODevice::ReadOnly)) {
          standardOutput << QObject::tr("Failed to open stdin for reading") << endl;
          return 1;
      }

      QByteArray writeData(dataFile.readAll());
      dataFile.close();

      if (writeData.isEmpty()) {
          standardOutput << QObject::tr("Either no data was currently available on the standard input for reading, or an error occurred for port %1, error: %2").arg(serialPortName).arg(serialPort.errorString()) << endl;
          return 1;
      }

      SerialPortWriter serialPortWriter(&serialPort);
      serialPortWriter.write(writeData);

      return coreApplication.exec();
  }