Created
September 14, 2022 07:57
-
-
Save dniklaus/4e88a4540bf02897e875b131174d4a7d to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
package dn; | |
import gnu.io.CommPort; | |
import gnu.io.CommPortIdentifier; | |
import gnu.io.SerialPort; | |
import gnu.io.SerialPortEvent; | |
import gnu.io.SerialPortEventListener; | |
import java.io.IOException; | |
import java.io.InputStream; | |
/** | |
* This version of the TwoWaySerialComm example makes use of the | |
* SerialPortEventListener to avoid polling. | |
* | |
* Source: http://www.javawenti.com/?post=91885 | |
*/ | |
public class TwoWaySerialComm | |
{ | |
public TwoWaySerialComm() | |
{ | |
super(); | |
} | |
void connect ( String portName ) throws Exception | |
{ | |
CommPortIdentifier portIdentifier = CommPortIdentifier.getPortIdentifier(portName); | |
if ( portIdentifier.isCurrentlyOwned() ) | |
{ | |
System.out.println("Error: Port is currently in use"); | |
} | |
else | |
{ | |
CommPort commPort = portIdentifier.open(this.getClass().getName(),2000); | |
if ( commPort instanceof SerialPort ) | |
{ | |
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 SerialWriter(out))).start(); | |
serialPort.addEventListener(new SerialReader(in)); | |
serialPort.notifyOnDataAvailable(true); | |
} | |
else | |
{ | |
System.out.println("Not a serial port..."); | |
} | |
} | |
} | |
public static class SerialReader implements SerialPortEventListener | |
{ | |
private InputStream in; | |
private byte[] buffer = new byte[1024]; | |
public SerialReader ( InputStream in ) | |
{ | |
this.in = in; | |
} | |
public void serialEvent(SerialPortEvent arg0) { | |
int data; | |
try | |
{ | |
int len = 0; | |
while ( ( data = in.read()) > -1 ) | |
{ | |
if ( data == '\n' ) { | |
break; | |
} | |
buffer[len++] = (byte) data; | |
} | |
System.out.print("Result="+new String(buffer,0,len)); | |
} | |
catch ( IOException e ) | |
{ | |
e.printStackTrace(); | |
System.exit(-1); | |
} | |
} | |
} | |
public static void main ( String[] args ) | |
{ | |
try | |
{ | |
(new TwoWaySerialComm()).connect("COM7"); | |
} | |
catch ( Exception e ) | |
{ | |
// TODO Auto-generated catch block | |
e.printStackTrace(); | |
} | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment