java 串口 RXTX 多线程
时间: 2023-05-13 11:05:50 浏览: 80
Java中使用RXTX库来操作串口,可以通过多线程来实现同时处理多个串口通信任务的需求。下面是一个简单的使用RXTX库实现串口多线程通信的示例代码:
```
import gnu.io.*;
public class SerialPortThread implements Runnable, SerialPortEventListener {
private SerialPort serialPort;
private Thread thread;
private String portName;
private int baudRate;
private boolean running;
public SerialPortThread(String portName, int baudRate) {
this.portName = portName;
this.baudRate = baudRate;
this.running = false;
}
public void start() {
try {
CommPortIdentifier portIdentifier = CommPortIdentifier.getPortIdentifier(portName);
CommPort commPort = portIdentifier.open(this.getClass().getName(), 2000);
if (commPort instanceof SerialPort) {
serialPort = (SerialPort) commPort;
serialPort.setSerialPortParams(baudRate, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);
serialPort.addEventListener(this);
serialPort.notifyOnDataAvailable(true);
thread = new Thread(this);
thread.start();
} else {
throw new Exception("Error: Only serial ports are handled by this example.");
}
} catch (Exception e) {
System.out.println("Error: " + e);
}
}
public void stop() {
running = false;
serialPort.removeEventListener();
serialPort.close();
thread.interrupt();
}
@Override
public void run() {
running = true;
while (running) {
try {
Thread.sleep(100);
} catch (InterruptedException e) {
System.out.println("Thread interrupted: " + e);
}
}
}
@Override
public void serialEvent(SerialPortEvent serialPortEvent) {
if (serialPortEvent.getEventType() == SerialPortEvent.DATA_AVAILABLE) {
try {
// 读取串口数据
byte[] buffer = new byte[serialPort.getInputStream().available()];
int len = serialPort.getInputStream().read(buffer);
System.out.println("Received " + len + " bytes: " + new String(buffer));
} catch (Exception e) {
System.out.println("Error: " + e);
}
}
}
}
```
这个例子实现了一个SerialPortThread类,它可以监听一个串口并在收到数据时打印出来。要使用它,你可以在你的应用程序中创建多个SerialPortThread对象并调用start()方法来开始监听串口。例如:
```
SerialPortThread port1 = new SerialPortThread("/dev/ttyUSB0", 9600);
SerialPortThread port2 = new SerialPortThread("/dev/ttyUSB1", 9600);
port1.start();
port2.start();
```
这将创建两个SerialPortThread实例并开始监听/dev/ttyUSB0和/dev/ttyUSB1串口。在运行时,你将看到在多个线程中同时接收串口数据的输出。记得在程序结束时调用stop()方法来停止所有线程。