给我一段使用java进行串口通信的代码
时间: 2024-05-05 09:18:21 浏览: 9
当然,我可以提供给你一段使用Java进行串口通信的代码。以下是一个简单的示例:
```java
import java.io.*;
import java.util.*;
import gnu.io.*;
public class SerialCommunicationExample implements SerialPortEventListener {
private SerialPort serialPort;
public SerialCommunicationExample() {}
public void connect(String portName) throws Exception {
CommPortIdentifier portIdentifier = CommPortIdentifier.getPortIdentifier(portName);
if (portIdentifier.isCurrentlyOwned()) {
System.err.println("Error: Port is currently in use");
} else {
CommPort commPort = portIdentifier.open(this.getClass().getName(),2000);
if (commPort instanceof SerialPort) {
serialPort = (SerialPort) commPort;
serialPort.setSerialPortParams(9600, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);
InputStream in = serialPort.getInputStream();
OutputStream out = serialPort.getOutputStream();
(new Thread(new SerialReader(in))).start();
(new Thread(new SerialWriter(out))).start();
serialPort.addEventListener(this);
serialPort.notifyOnDataAvailable(true);
} else {
System.err.println("Error: Only serial ports are handled by this example.");
}
}
}
private static class SerialReader implements Runnable {
private InputStream in;
public SerialReader(InputStream in) {
this.in = in;
}
public void run() {
byte[] buffer = new byte[1024];
int len = -1;
try {
while ((len = this.in.read(buffer)) > -1) {
System.out.print(new String(buffer, 0, len));
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
private static class SerialWriter implements Runnable {
private OutputStream out;
public SerialWriter(OutputStream out) {
this.out = out;
}
public void run() {
try {
int c = 0;
while ((c = System.in.read()) > -1) {
this.out.write(c);
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
public void serialEvent(SerialPortEvent event) {
switch (event.getEventType()) {
case SerialPortEvent.DATA_AVAILABLE:
byte[] buffer = new byte[1024];
int len = -1;
try {
while ((len = this.serialPort.getInputStream().read(buffer)) > -1) {
System.out.print(new String(buffer, 0, len));
}
} catch (IOException e) {
e.printStackTrace();
}
break;
}
}
public static void main(String[] args) {
SerialCommunicationExample example = new SerialCommunicationExample();
try {
example.connect("/dev/ttyUSB0");
} catch (Exception e) {
e.printStackTrace();
}
}
}
```
这段代码可以在Linux系统上进行串口通信,需要将串口的路径 "/dev/ttyUSB0" 替换为正确路径。