Qt 串口，多线程（子线程处理串口信号）

/**************************************************************************** ** ** Copyright (C) 2012 Denis Shienkov <[email protected]> ** 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 "masterthread.h" #include <QtSerialPort/QSerialPort> #include <QTime> QT_USE_NAMESPACE MasterThread::MasterThread(QObject *parent) : QThread(parent), waitTimeout(0), quit(false) { } //! [0] MasterThread::~MasterThread() { mutex.lock(); quit = true; cond.wakeOne(); mutex.unlock(); wait(); } //! [0] //! [1] //! [2] void MasterThread::transaction(const QString &portName, int waitTimeout, const QString &request) { //! [1] QMutexLocker locker(&mutex); this->portName = portName; this->waitTimeout = waitTimeout; this->request = request; //! [3] if (!isRunning()) start(); else cond.wakeOne(); } void MasterThread::sendcmd(const QString &portName, int waitTimeout, char *txbuf, int lenth) { //! [1] QMutexLocker locker(&mutex); this->portName = portName; this->waitTimeout = waitTimeout; this->cmdBuf=txbuf; this->cmdLenth = lenth; //! [3] if (!isRunning()) start(); else cond.wakeOne(); } //! [2] //! [3] //! [4] void MasterThread::run() { bool currentPortNameChanged = false; mutex.lock(); //! [4] //! [5] QString currentPortName; if (currentPortName != portName) { currentPortName = portName; currentPortNameChanged = true; } int currentWaitTimeout = waitTimeout; QString currentRequest = request; mutex.unlock(); //! [5] //! [6] QSerialPort serial; if (currentPortName.isEmpty()) { emit error(tr("No port name specified")); return; } while (!quit) { //![6] //! [7] if (currentPortNameChanged) { serial.close(); serial.setPortName(currentPortName); // serial.setBaudRate(QSerialPort::Baud115200); serial.setDataBits(QSerialPort::Data8); serial.setParity(QSerialPort::NoParity); serial.setStopBits(QSerialPort::OneStop); serial.setFlowControl(QSerialPort::NoFlowControl); serial.setReadBufferSize(8); if (!serial.open(QIODevice::ReadWrite)) { emit error(tr("Can't open %1, error code %2") .arg(portName).arg(serial.error())); return; } } //! [7] //! [8] // write request //QByteArray requestData = currentRequest.toLocal8Bit(); //serial.write(requestData); //serial.write(this->cmdBuf, this->cmdLenth); QByteArray ba2(this->cmdBuf,this->cmdLenth); serial.write(ba2); if (serial.waitForBytesWritten(waitTimeout)) { //! [8] //! [10] // read response if (serial.waitForReadyRead(currentWaitTimeout)) { QByteArray responseData = serial.readAll(); while (serial.waitForReadyRead(10)) responseData += serial.readAll(); this->rxBufSize=responseData.size(); this->rxBuf= responseData.data(); QString response(responseData); //! [12] emit this->response(response); //! [10] //! [11] //! [12] } else { emit timeout(tr("Wait read response timeout %1") .arg(QTime::currentTime().toString())); } //! [9] //! [11] } else { emit timeout(tr("Wait write request timeout %1") .arg(QTime::currentTime().toString())); } //! [9] //! [13] mutex.lock(); cond.wait(&mutex); if (currentPortName != portName) { currentPortName = portName; currentPortNameChanged = true; } else { currentPortNameChanged = false; } currentWaitTimeout = waitTimeout; currentRequest = request; mutex.unlock(); } //! [13] } void MasterThread::stop(){ quit =true; }