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package org.crec.serialPort;
import gnu.io.CommPort;
import gnu.io.CommPortIdentifier;
import gnu.io.NoSuchPortException;
import gnu.io.PortInUseException;
import gnu.io.SerialPort;
import gnu.io.SerialPortEventListener;
import gnu.io.UnsupportedCommOperationException;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.TooManyListenersException;
import org.crec.serialException.NoSuchPort;
import org.crec.serialException.NotASerialPort;
import org.crec.serialException.PortInUse;
import org.crec.serialException.ReadDataFromSerialPortFailure;
import org.crec.serialException.SendDataToSerialPortFailure;
import org.crec.serialException.SerialPortInputStreamCloseFailure;
import org.crec.serialException.SerialPortOutputStreamCloseFailure;
import org.crec.serialException.SerialPortParameterFailure;
import org.crec.serialException.TooManyListeners;
public class SerialTool {
private static SerialTool serialTool = null;
static {
// 在该类被ClassLoader加载时就初始化一个SerialTool对象
if (serialTool == null) {
serialTool = new SerialTool();
}
}
// 私有化SerialTool类的构造方法，不允许其他类生成SerialTool对象
private SerialTool() {
}
/**
* 获取提供服务的SerialTool对象
*
* @return serialTool
*/
public static SerialTool getSerialTool() {
if (serialTool == null) {
serialTool = new SerialTool();
}
return serialTool;
}
/**
* 查找所有可用端口
* @return 可用端口名称列表
*/
@SuppressWarnings("unchecked")
public static final ArrayList<String> findPort() {
//获得当前所有可用串口
Enumeration<CommPortIdentifier> portList = CommPortIdentifier.getPortIdentifiers();
ArrayList<String> portNameList = new ArrayList<>();
//将可用串口名添加到List并返回该List
while (portList.hasMoreElements()) {
String portName = portList.nextElement().getName();
portNameList.add(portName);
System.out.println(portName);
}
return portNameList;
}
/**
* 打开串口
* @param portName 端口名称
* @param baudrate 波特率
* @return 串口对象
* @throws SerialPortParameterFailure 设置串口参数失败
* @throws NotASerialPort 端口指向设备不是串口类型
* @throws NoSuchPort 没有该端口对应的串口设备
* @throws PortInUse 端口已被占用
*/
public static final SerialPort openPort(String portName, int baudrate) throws SerialPortParameterFailure, NotASerialPort, NoSuchPort, PortInUse {
try {
//通过端口名识别端口
CommPortIdentifier portIdentifier = CommPortIdentifier.getPortIdentifier(portName);
//打开端口，并给端口名字和一个timeout（打开操作的超时时间）
CommPort commPort = portIdentifier.open(portName, 2000);
//判断是不是串口
if (commPort instanceof SerialPort) {
SerialPort serialPort = (SerialPort) commPort;
try {
//设置一下串口的波特率等参数(波特率，校验位，数据位，停止位)
serialPort.setSerialPortParams(baudrate, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);
} catch (UnsupportedCommOperationException e) {
throw new SerialPortParameterFailure();
}
//System.out.println("Open " portName " sucessfully !");
return serialPort;
}
else {
//不是串口
throw new NotASerialPort();
}
} catch (NoSuchPortException e1) {
throw new NoSuchPort();
} catch (PortInUseException e2) {
throw new PortInUse();
}
}
/**
* 关闭串口
* @param serialport 待关闭的串口对象
*/
public static void closePort(SerialPort serialPort) {
if (serialPort != null) {
serialPort.close();
serialPort = null;
}
}
/**
* 往串口发送数据
* @param serialPort 串口对象
* @param order 待发送数据
* @throws SendDataToSerialPortFailure 向串口发送数据失败
* @throws SerialPortOutputStreamCloseFailure 关闭串口对象的输出流出错
*/
public static void sendToPort(SerialPort serialPort, byte[] order) throws SendDataToSerialPortFailure, SerialPortOutputStreamCloseFailure {
OutputStream out = null;
try {
out = serialPort.getOutputStream();
out.write(order,0,21);
out.flush();
} catch (IOException e) {
throw new SendDataToSerialPortFailure();
} finally {
try {
if (out != null) {
out.close();
out = null;
}
} catch (IOException e) {
throw new SerialPortOutputStreamCloseFailure();
}
}
}
/**
* 从串口读取数据
* @param serialPort 当前已建立连接的SerialPort对象
* @return 读取到的数据
* @throws ReadDataFromSerialPortFailure 从串口读取数据时出错
* @throws SerialPortInputStreamCloseFailure 关闭串口对象输入流出错
*/
public static byte[] readFromPort(SerialPort serialPort) throws ReadDataFromSerialPortFailure, SerialPortInputStreamCloseFailure {
InputStream in = null;
byte[] bytes = null;
try {
in = serialPort.getInputStream();
int bufflenth = in.available(); //获取buffer里的数据长度
while (bufflenth != 0) {
bytes = new byte[bufflenth]; //初始化byte数组为buffer中数据的长度
in.read(bytes);
bufflenth = in.available();
}
} catch (IOException e) {
throw new ReadDataFromSerialPortFailure();
} finally {
try {
if (in != null) {
in.close();
in = null;
}
} catch(IOException e) {
throw new SerialPortInputStreamCloseFailure();
}
}
return bytes;
}
/**
* 添加监听器
* @param port 串口对象
* @param listener 串口监听器
* @throws TooManyListeners 监听类对象过多
*/
public static void addListener(SerialPort port, SerialPortEventListener listener) throws TooManyListeners {
try {
//给串口添加监听器
port.addEventListener(listener);
//设置当有数据到达时唤醒监听接收线程
port.notifyOnDataAvailable(true);
//设置当通信中断时唤醒中断线程
port.notifyOnBreakInterrupt(true);
System.out.println("添加监听！");
} catch (TooManyListenersException e) {
throw new TooManyListeners();
}
}
/*public static void main(String[] args) {
new SerialPortEventListener() {
@Override
public void serialEvent(SerialPortEvent event) {
try
{
Thread.sleep(100);
}
catch ( InterruptedException e )
{
e.printStackTrace();
}
switch ( event.getEventType() )
{
case SerialPortEvent.BI: // 10
case SerialPortEvent.OE: // 7
case SerialPortEvent.FE: // 9
case SerialPortEvent.PE: // 8
case SerialPortEvent.CD: // 6
case SerialPortEvent.CTS: // 3
case SerialPortEvent.DSR: // 4
case SerialPortEvent.RI: // 5
case SerialPortEvent.OUTPUT_BUFFER_EMPTY: // 2
break;
case SerialPortEvent.DATA_AVAILABLE: // 1
try
{
// 多次读取,将所有数据读入
while (inputStream.available() > 0) {
numBytes = inputStream.read(readBuffer);
}
//打印接收到的字节数据的ASCII码
for(int i=0;i<numBytes;i ){
// System.out.println("msg[" numBytes "]: [" readBuffer[i] "]:" (char)readBuffer[i]);
}
// numBytes = inputStream.read( readBuffer );
changeMessage( readBuffer, numBytes );
}
catch ( IOException e )
{
e.printStackTrace();
}
break;
}
}
};
}*/
}