Qt中以线程方式实现串口收发短接的测试
时间: 2024-03-17 18:39:36 浏览: 160
在Qt中实现串口的收发可以使用Qt的串口类QSerialPort。为了避免串口收发阻塞主线程,应该使用多线程的方式进行串口收发。
下面是一个简单的串口收发的多线程实现示例:
首先定义一个Worker类,用于执行串口收发任务。
```cpp
class Worker : public QObject
{
Q_OBJECT
public:
Worker(QObject *parent = nullptr);
public slots:
void doWork();
signals:
void resultReady(const QString &result);
private:
QSerialPort m_serialPort;
};
```
在Worker类中,我们定义了一个QSerialPort成员变量m_serialPort,用于处理串口收发。在doWork()函数中实现收发逻辑,并通过resultReady信号将结果返回给主线程。
```cpp
Worker::Worker(QObject *parent)
: QObject(parent)
{
m_serialPort.setPortName("COM1");
m_serialPort.setBaudRate(QSerialPort::Baud9600);
m_serialPort.setDataBits(QSerialPort::Data8);
m_serialPort.setParity(QSerialPort::NoParity);
m_serialPort.setStopBits(QSerialPort::OneStop);
m_serialPort.setFlowControl(QSerialPort::NoFlowControl);
if (!m_serialPort.open(QIODevice::ReadWrite)) {
emit resultReady(tr("Failed to open serial port"));
}
}
void Worker::doWork()
{
QByteArray requestData = "Hello World";
if (m_serialPort.write(requestData) == -1) {
emit resultReady(tr("Failed to write data to serial port"));
}
if (m_serialPort.waitForReadyRead(1000)) {
QByteArray responseData = m_serialPort.readAll();
while (m_serialPort.waitForReadyRead(10)) {
responseData += m_serialPort.readAll();
}
emit resultReady(QString(responseData));
} else {
emit resultReady(tr("No response from serial port"));
}
}
```
在主线程中,我们创建一个QThread对象,并将Worker对象移动到该线程中执行。
```cpp
QThread* thread = new QThread;
Worker* worker = new Worker;
worker->moveToThread(thread);
connect(worker, &Worker::resultReady, this, &MyClass::handleResult);
connect(thread, &QThread::started, worker, &Worker::doWork);
connect(worker, &Worker::finished, thread, &QThread::quit);
connect(worker, &Worker::finished, worker, &Worker::deleteLater);
connect(thread, &QThread::finished, thread, &QThread::deleteLater);
thread->start();
```
最后,我们在handleResult()槽函数中处理Worker对象返回的结果。
```cpp
void MyClass::handleResult(const QString &result)
{
qDebug() << result;
}
```
这样就完成了一个简单的串口收发的多线程实现。
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