Debian 8 x86_64 Java 使用 NRSerialPort 开发串口通信

使用方法: https://github.com/NeuronRobotics/nrjavaserial

下载: https://oss.sonatype.org/#nexus-search;gav~com.neuronrobotics~nrjavaserial~~~

测试代码

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.util.TooManyListenersException;

import gnu.io.NRSerialPort;
import gnu.io.SerialPortEvent;
import gnu.io.SerialPortEventListener;

public class NRJavaSerialDemo {

void connect(String port) {
for (String s : NRSerialPort.getAvailableSerialPorts()) {
System.out.println("Availible port: " + s);
}
int baudRate = 115200;
NRSerialPort serialPort = new NRSerialPort(port, baudRate);
serialPort.connect();

DataInputStream inStream = new DataInputStream(serialPort.getInputStream());
DataOutputStream outStream = new DataOutputStream(serialPort.getOutputStream());

new Thread(new SerialWriter(outStream)).start();

try {
serialPort.addEventListener(new SerialReader(inStream));
serialPort.notifyOnDataAvailable(true);
} catch (TooManyListenersException e1) {
e1.printStackTrace();
}

try {
String testData = "ATD139xxxxxxxx;\n";
outStream.write(testData.getBytes());
} catch (IOException e) {
e.printStackTrace();
}
}

public static class SerialReader implements SerialPortEventListener {
private DataInputStream inStream;
private byte[] buffer = new byte[1024];

public SerialReader(DataInputStream inStream) {
this.inStream = inStream;
}

public void serialEvent(SerialPortEvent arg0) {
int data;

int len = 0;
try {
while ((data = inStream.read()) > -1)
buffer[len++] = (byte) data;
System.out.println(new String(buffer, 0, len));
} catch (IOException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
}

public static class SerialWriter implements Runnable {
private DataOutputStream outStream;

public SerialWriter(DataOutputStream outStream) {
this.outStream = outStream;
}

public void run() {
int c = 0;
try {
while ((c = System.in.read()) > -1)
this.outStream.write(c);
} catch (IOException e) {
e.printStackTrace();
}
}
}

public static void main(String[] args) {
try {
new NRJavaSerialDemo().connect("/dev/ttyUSB0");
} catch (Exception e) {
e.printStackTrace();
}
}
}

说明

使用 DataInputstream 不要使用 InputStream， InputStream 会接收不到数据

测试代码除使用 NRSerialPort类 代替 RXTX 的 SerialPort类， 其他部分和 RXTX 案例一样

NRSerialPort 不需要 RXTX 的两个 so文件, 可以直接使用

RXTX 案例: http://rxtx.qbang.org/wiki/index.php/Examples