slavethread.cpp Example File

blockingslave/slavethread.cpp
/**************************************************************************** ** ** Copyright (C) 2012 Denis Shienkov <denis.shienkov@gmail.com> ** 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 "slavethread.h" #include <QSerialPort> #include <QTime> SlaveThread::SlaveThread(QObject *parent) : QThread(parent) { } SlaveThread::~SlaveThread() { m_mutex.lock(); m_quit = true; m_mutex.unlock(); wait(); } void SlaveThread::startSlave(const QString &portName, int waitTimeout, const QString &response) { const QMutexLocker locker(&m_mutex); m_portName = portName; m_waitTimeout = waitTimeout; m_response = response; if (!isRunning()) start(); } void SlaveThread::run() { bool currentPortNameChanged = false; m_mutex.lock(); QString currentPortName; if (currentPortName != m_portName) { currentPortName = m_portName; currentPortNameChanged = true; } int currentWaitTimeout = m_waitTimeout; QString currentRespone = m_response; m_mutex.unlock(); QSerialPort serial; while (!m_quit) { if (currentPortNameChanged) { serial.close(); serial.setPortName(currentPortName); if (!serial.open(QIODevice::ReadWrite)) { emit error(tr("Can't open %1, error code %2") .arg(m_portName).arg(serial.error())); return; } } if (serial.waitForReadyRead(currentWaitTimeout)) { // read request QByteArray requestData = serial.readAll(); while (serial.waitForReadyRead(10)) requestData += serial.readAll(); // write response const QByteArray responseData = currentRespone.toUtf8(); serial.write(responseData); if (serial.waitForBytesWritten(m_waitTimeout)) { const QString request = QString::fromUtf8(requestData); emit this->request(request); } else { emit timeout(tr("Wait write response timeout %1") .arg(QTime::currentTime().toString())); } } else { emit timeout(tr("Wait read request timeout %1") .arg(QTime::currentTime().toString())); } m_mutex.lock(); if (currentPortName != m_portName) { currentPortName = m_portName; currentPortNameChanged = true; } else { currentPortNameChanged = false; } currentWaitTimeout = m_waitTimeout; currentRespone = m_response; m_mutex.unlock(); } }

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