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Java串口通信,如何获取并使用源码?
- 行业动态
- 2024-10-09
- 1
Java串口通信可以使用RXTX库。以下是一个简单的示例:,,“
java,import gnu.io.CommPort;,import gnu.io.CommPortIdentifier;,import gnu.io.SerialPort;,,import java.io.IOException;,import java.io.InputStream;,import java.io.OutputStream;,,public class SerialExample {, public static void main(String[] args) {, try {, CommPortIdentifier portId = CommPortIdentifier.getPortIdentifier("COM1");, CommPort commPort = portId.open("SerialExample", 2000);, SerialPort serialPort = (SerialPort) commPort;, serialPort.setSerialPortParams(9600, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);,, InputStream in = serialPort.getInputStream();, OutputStream out = serialPort.getOutputStream();,, out.write("Hello, Serial!".getBytes());,, byte[] buffer = new byte[1024];, int len = in.read(buffer);, System.out.println(new String(buffer, 0, len));,, in.close();, out.close();, commPort.close();, } catch (Exception e) {, e.printStackTrace();, }, },},
“,,这段代码使用RXTX库实现了一个简单的Java串口通信示例,通过串口发送”Hello, Serial!”字符串,并接收串口返回的数据。
import gnu.io.CommPortIdentifier; import gnu.io.SerialPort; import gnu.io.SerialPortEvent; import gnu.io.SerialPortEventListener; import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.OutputStream; import java.util.Enumeration; public class SerialTest implements SerialPortEventListener { SerialPort serialPort; private static final String PORT_NAMES[] = { "/dev/tty.usbserialA9007UX1", // Mac OS X "/dev/ttyUSB0", // Linux "COM3", // Windows }; private BufferedReader input; private OutputStream output; private static final int TIME_OUT = 2000; private static final int DATA_RATE = 9600; public void initialize() { CommPortIdentifier portId = null; Enumeration portEnum = CommPortIdentifier.getPortIdentifiers(); while (portEnum.hasMoreElements()) { CommPortIdentifier currPortId = (CommPortIdentifier) portEnum.nextElement(); for (String portName : PORT_NAMES) { if (currPortId.getName().equals(portName)) { portId = currPortId; break; } } } if (portId == null) { System.out.println("Could not find COM port."); return; } try { serialPort = (SerialPort) portId.open(this.getClass().getName(), TIME_OUT); serialPort.setSerialPortParams(DATA_RATE, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE); input = new BufferedReader(new InputStreamReader(serialPort.getInputStream())); output = serialPort.getOutputStream(); serialPort.addEventListener(this); serialPort.notifyOnDataAvailable(true); } catch (Exception e) { System.err.println(e.toString()); } } public synchronized void close() { if (serialPort != null) { serialPort.removeEventListener(); serialPort.close(); } } public synchronized void serialEvent(SerialPortEvent oEvent) { if (oEvent.getEventType() == SerialPortEvent.DATA_AVAILABLE) { try { String inputLine = input.readLine(); System.out.println(inputLine); } catch (Exception e) { System.err.println(e.toString()); } } } public static void main(String[] args) throws Exception { SerialTest main = new SerialTest(); main.initialize(); System.out.println("Started"); Thread.sleep(100000); main.close(); System.out.println("Stopped"); } }
这个示例程序首先尝试找到可用的串口,然后设置串口参数(波特率、数据位、停止位和奇偶校验),它创建一个输入流和一个输出流,以便从串口读取数据和向串口写入数据,它添加一个事件监听器,当有数据可用时触发serialEvent
方法,在main
方法中,程序初始化串口,等待100秒后关闭串口。
到此,以上就是小编对于“java 串口 源码”的问题就介绍到这了,希望介绍的几点解答对大家有用,有任何问题和不懂的,欢迎各位朋友在评论区讨论,给我留言。
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