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3** Copyright (C) 2012 Denis Shienkov <denis.shienkov@gmail.com>
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50
51#include "masterthread.h"
52
53#include <QSerialPort>
54#include <QTime>
55
56MasterThread::MasterThread(QObject *parent) :
57 QThread(parent)
58{
59}
60
61//! [0]
62MasterThread::~MasterThread()
63{
64 m_mutex.lock();
65 m_quit = true;
66 m_cond.wakeOne();
67 m_mutex.unlock();
68 wait();
69}
70//! [0]
71
72//! [1] //! [2]
73void MasterThread::transaction(const QString &portName, int waitTimeout, const QString &request)
74{
75//! [1]
76 const QMutexLocker locker(&m_mutex);
77 m_portName = portName;
78 m_waitTimeout = waitTimeout;
79 m_request = request;
80//! [3]
81 if (!isRunning())
82 start();
83 else
84 m_cond.wakeOne();
85}
86//! [2] //! [3]
87
88//! [4]
89void MasterThread::run()
90{
91 bool currentPortNameChanged = false;
92
93 m_mutex.lock();
94//! [4] //! [5]
95 QString currentPortName;
96 if (currentPortName != m_portName) {
97 currentPortName = m_portName;
98 currentPortNameChanged = true;
99 }
100
101 int currentWaitTimeout = m_waitTimeout;
102 QString currentRequest = m_request;
103 m_mutex.unlock();
104//! [5] //! [6]
105 QSerialPort serial;
106
107 if (currentPortName.isEmpty()) {
108 emit error(s: tr(s: "No port name specified"));
109 return;
110 }
111
112 while (!m_quit) {
113//![6] //! [7]
114 if (currentPortNameChanged) {
115 serial.close();
116 serial.setPortName(currentPortName);
117
118 if (!serial.open(mode: QIODevice::ReadWrite)) {
119 emit error(s: tr(s: "Can't open %1, error code %2")
120 .arg(a: m_portName).arg(a: serial.error()));
121 return;
122 }
123 }
124//! [7] //! [8]
125 // write request
126 const QByteArray requestData = currentRequest.toUtf8();
127 serial.write(data: requestData);
128 if (serial.waitForBytesWritten(msecs: m_waitTimeout)) {
129//! [8] //! [10]
130 // read response
131 if (serial.waitForReadyRead(msecs: currentWaitTimeout)) {
132 QByteArray responseData = serial.readAll();
133 while (serial.waitForReadyRead(msecs: 10))
134 responseData += serial.readAll();
135
136 const QString response = QString::fromUtf8(str: responseData);
137//! [12]
138 emit this->response(s: response);
139//! [10] //! [11] //! [12]
140 } else {
141 emit timeout(s: tr(s: "Wait read response timeout %1")
142 .arg(a: QTime::currentTime().toString()));
143 }
144//! [9] //! [11]
145 } else {
146 emit timeout(s: tr(s: "Wait write request timeout %1")
147 .arg(a: QTime::currentTime().toString()));
148 }
149//! [9] //! [13]
150 m_mutex.lock();
151 m_cond.wait(lockedMutex: &m_mutex);
152 if (currentPortName != m_portName) {
153 currentPortName = m_portName;
154 currentPortNameChanged = true;
155 } else {
156 currentPortNameChanged = false;
157 }
158 currentWaitTimeout = m_waitTimeout;
159 currentRequest = m_request;
160 m_mutex.unlock();
161 }
162//! [13]
163}
164

source code of qtserialport/examples/serialport/blockingmaster/masterthread.cpp