slavethread.cpp Example File
blockingslave/slavethread.cpp
#include "slavethread.h"
#include <QtSerialPort/QSerialPort>
#include <QTime>
QT_USE_NAMESPACE
SlaveThread::SlaveThread(QObject *parent)
: QThread(parent), waitTimeout(0), quit(false)
{
}
SlaveThread::~SlaveThread()
{
mutex.lock();
quit = true;
mutex.unlock();
wait();
}
void SlaveThread::startSlave(const QString &portName, int waitTimeout, const QString &response)
{
QMutexLocker locker(&mutex);
this->portName = portName;
this->waitTimeout = waitTimeout;
this->response = response;
if (!isRunning())
start();
}
void SlaveThread::run()
{
bool currentPortNameChanged = false;
mutex.lock();
QString currentPortName;
if (currentPortName != portName) {
currentPortName = portName;
currentPortNameChanged = true;
}
int currentWaitTimeout = waitTimeout;
QString currentRespone = response;
mutex.unlock();
QSerialPort serial;
while (!quit) {
if (currentPortNameChanged) {
serial.close();
serial.setPortName(currentPortName);
if (!serial.open(QIODevice::ReadWrite)) {
emit error(tr("Can't open %1, error code %2")
.arg(portName).arg(serial.error()));
return;
}
if (!serial.setBaudRate(QSerialPort::Baud9600)) {
emit error(tr("Can't set baud rate 9600 baud to port %1, error code %2")
.arg(portName).arg(serial.error()));
return;
}
if (!serial.setDataBits(QSerialPort::Data8)) {
emit error(tr("Can't set 8 data bits to port %1, error code %2")
.arg(portName).arg(serial.error()));
return;
}
if (!serial.setParity(QSerialPort::NoParity)) {
emit error(tr("Can't set no patity to port %1, error code %2")
.arg(portName).arg(serial.error()));
return;
}
if (!serial.setStopBits(QSerialPort::OneStop)) {
emit error(tr("Can't set 1 stop bit to port %1, error code %2")
.arg(portName).arg(serial.error()));
return;
}
if (!serial.setFlowControl(QSerialPort::NoFlowControl)) {
emit error(tr("Can't set no flow control to port %1, error code %2")
.arg(portName).arg(serial.error()));
return;
}
}
if (serial.waitForReadyRead(currentWaitTimeout)) {
QByteArray requestData = serial.readAll();
while (serial.waitForReadyRead(10))
requestData += serial.readAll();
QByteArray responseData = currentRespone.toLocal8Bit();
serial.write(responseData);
if (serial.waitForBytesWritten(waitTimeout)) {
QString request(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()));
}
mutex.lock();
if (currentPortName != portName) {
currentPortName = portName;
currentPortNameChanged = true;
} else {
currentPortNameChanged = false;
}
currentWaitTimeout = waitTimeout;
currentRespone = response;
mutex.unlock();
}
}