<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>main.cpp Example File | Qt Serial Port 5.12.2</title> <link rel="stylesheet" type="text/css" href="style/offline-simple.css" /> <script type="text/javascript"> document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css"); // loading style sheet breaks anchors that were jumped to before // so force jumping to anchor again setTimeout(function() { var anchor = location.hash; // need to jump to different anchor first (e.g. none) location.hash = "#"; setTimeout(function() { location.hash = anchor; }, 0); }, 0); </script> </head> <body> <div class="header" id="qtdocheader"> <div class="main"> <div class="main-rounded"> <div class="navigationbar"> <table><tr> <td >Qt 5.12</td><td ><a href="qtserialport-index.html">Qt Serial Port</a></td><td ><a href="qtserialport-cwriterasync-example.html">Command Line Writer Async Example</a></td><td >main.cpp Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtserialport-index.html">Qt 5.12.2 Reference Documentation</a></td> </tr></table> </div> </div> <div class="content"> <div class="line"> <div class="content mainContent"> <div class="sidebar"><div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">main.cpp Example File</h1> <span class="subtitle">cwriterasync/main.cpp</span> <!-- $$$cwriterasync/main.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** 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." ** ** $QT_END_LICENSE$ ** ****************************************************************************/</span> <span class="preprocessor">#include "serialportwriter.h"</span> <span class="preprocessor">#include <QCoreApplication></span> <span class="preprocessor">#include <QFile></span> <span class="preprocessor">#include <QSerialPort></span> <span class="preprocessor">#include <QStringList></span> <span class="preprocessor">#include <QTextStream></span> <span class="type">int</span> main(<span class="type">int</span> argc<span class="operator">,</span> <span class="type">char</span> <span class="operator">*</span>argv<span class="operator">[</span><span class="operator">]</span>) { <span class="type">QCoreApplication</span> coreApplication(argc<span class="operator">,</span> argv); <span class="keyword">const</span> <span class="type">int</span> argumentCount <span class="operator">=</span> <span class="type">QCoreApplication</span><span class="operator">::</span>arguments()<span class="operator">.</span>size(); <span class="keyword">const</span> <span class="type">QStringList</span> argumentList <span class="operator">=</span> <span class="type">QCoreApplication</span><span class="operator">::</span>arguments(); <span class="type">QTextStream</span> standardOutput(stdout); <span class="keyword">if</span> (argumentCount <span class="operator">=</span><span class="operator">=</span> <span class="number">1</span>) { standardOutput <span class="operator"><</span><span class="operator"><</span> <span class="type">QObject</span><span class="operator">::</span>tr(<span class="string">"Usage: %1 <serialportname> [baudrate]"</span>) <span class="operator">.</span>arg(argumentList<span class="operator">.</span>first()) <span class="operator"><</span><span class="operator"><</span> endl; <span class="keyword">return</span> <span class="number">1</span>; } <span class="type"><a href="qserialport.html">QSerialPort</a></span> serialPort; <span class="keyword">const</span> <span class="type">QString</span> serialPortName <span class="operator">=</span> argumentList<span class="operator">.</span>at(<span class="number">1</span>); serialPort<span class="operator">.</span>setPortName(serialPortName); <span class="keyword">const</span> <span class="type">int</span> serialPortBaudRate <span class="operator">=</span> (argumentCount <span class="operator">></span> <span class="number">2</span>) <span class="operator">?</span> argumentList<span class="operator">.</span>at(<span class="number">2</span>)<span class="operator">.</span>toInt() : <span class="type"><a href="qserialport.html">QSerialPort</a></span><span class="operator">::</span>Baud9600; serialPort<span class="operator">.</span>setBaudRate(serialPortBaudRate); serialPort<span class="operator">.</span>open(<span class="type">QIODevice</span><span class="operator">::</span>WriteOnly); <span class="type">QFile</span> dataFile; <span class="keyword">if</span> (<span class="operator">!</span>dataFile<span class="operator">.</span>open(stdin<span class="operator">,</span> <span class="type">QIODevice</span><span class="operator">::</span>ReadOnly)) { standardOutput <span class="operator"><</span><span class="operator"><</span> <span class="type">QObject</span><span class="operator">::</span>tr(<span class="string">"Failed to open stdin for reading"</span>) <span class="operator"><</span><span class="operator"><</span> endl; <span class="keyword">return</span> <span class="number">1</span>; } <span class="keyword">const</span> <span class="type">QByteArray</span> writeData(dataFile<span class="operator">.</span>readAll()); dataFile<span class="operator">.</span>close(); <span class="keyword">if</span> (writeData<span class="operator">.</span>isEmpty()) { standardOutput <span class="operator"><</span><span class="operator"><</span> <span class="type">QObject</span><span class="operator">::</span>tr(<span class="string">"Either no data was currently available on "</span> <span class="string">"the standard input for reading, "</span> <span class="string">"or an error occurred for port %1, error: %2"</span>) <span class="operator">.</span>arg(serialPortName)<span class="operator">.</span>arg(serialPort<span class="operator">.</span>errorString()) <span class="operator"><</span><span class="operator"><</span> endl; <span class="keyword">return</span> <span class="number">1</span>; } SerialPortWriter serialPortWriter(<span class="operator">&</span>serialPort); serialPortWriter<span class="operator">.</span>write(writeData); <span class="keyword">return</span> coreApplication<span class="operator">.</span>exec(); } </pre> </div> <!-- @@@cwriterasync/main.cpp --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2019 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners.<br/> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.<br/> Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. </p> </div> </body> </html>