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3** Copyright (C) 2012 Denis Shienkov <denis.shienkov@gmail.com>
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50
51#include "slavethread.h"
52
53#include <QSerialPort>
54#include <QTime>
55
56SlaveThread::SlaveThread(QObject *parent) :
57 QThread(parent)
58{
59}
60
61//! [0]
62SlaveThread::~SlaveThread()
63{
64 m_mutex.lock();
65 m_quit = true;
66 m_mutex.unlock();
67 wait();
68}
69//! [0]
70
71//! [1] //! [2]
72void SlaveThread::startSlave(const QString &portName, int waitTimeout, const QString &response)
73{
74 //! [1]
75 const QMutexLocker locker(&m_mutex);
76 m_portName = portName;
77 m_waitTimeout = waitTimeout;
78 m_response = response;
79 //! [3]
80 if (!isRunning())
81 start();
82}
83//! [2] //! [3]
84
85//! [4]
86void SlaveThread::run()
87{
88 bool currentPortNameChanged = false;
89
90 m_mutex.lock();
91//! [4] //! [5]
92 QString currentPortName;
93 if (currentPortName != m_portName) {
94 currentPortName = m_portName;
95 currentPortNameChanged = true;
96 }
97
98 int currentWaitTimeout = m_waitTimeout;
99 QString currentRespone = m_response;
100 m_mutex.unlock();
101//! [5] //! [6]
102 QSerialPort serial;
103
104 while (!m_quit) {
105//![6] //! [7]
106 if (currentPortNameChanged) {
107 serial.close();
108 serial.setPortName(currentPortName);
109
110 if (!serial.open(mode: QIODevice::ReadWrite)) {
111 emit error(s: tr(s: "Can't open %1, error code %2")
112 .arg(a: m_portName).arg(a: serial.error()));
113 return;
114 }
115 }
116
117 if (serial.waitForReadyRead(msecs: currentWaitTimeout)) {
118//! [7] //! [8]
119 // read request
120 QByteArray requestData = serial.readAll();
121 while (serial.waitForReadyRead(msecs: 10))
122 requestData += serial.readAll();
123//! [8] //! [10]
124 // write response
125 const QByteArray responseData = currentRespone.toUtf8();
126 serial.write(data: responseData);
127 if (serial.waitForBytesWritten(msecs: m_waitTimeout)) {
128 const QString request = QString::fromUtf8(str: requestData);
129//! [12]
130 emit this->request(s: request);
131//! [10] //! [11] //! [12]
132 } else {
133 emit timeout(s: tr(s: "Wait write response timeout %1")
134 .arg(a: QTime::currentTime().toString()));
135 }
136//! [9] //! [11]
137 } else {
138 emit timeout(s: tr(s: "Wait read request timeout %1")
139 .arg(a: QTime::currentTime().toString()));
140 }
141//! [9] //! [13]
142 m_mutex.lock();
143 if (currentPortName != m_portName) {
144 currentPortName = m_portName;
145 currentPortNameChanged = true;
146 } else {
147 currentPortNameChanged = false;
148 }
149 currentWaitTimeout = m_waitTimeout;
150 currentRespone = m_response;
151 m_mutex.unlock();
152 }
153//! [13]
154}
155

source code of qtserialport/examples/serialport/blockingslave/slavethread.cpp