Simple read code from RS232

Question

Hi
I want to read stream of bytes from rs232 connected to microcontroller which send data ,i 'm sure that data arrive proberely before the serial cable but the code have aproblem see it
package myserial;
import java.io.*;
import java.util.*;
import javax.comm.*;
* @author volcano_lab
public class Main implements  Runnable, SerialPortEventListener {
    /** Creates a new instance of Main */
    public Main() {try {
             cp=CommPortIdentifier.getPortIdentifier("COM1");
            try {
                cpe=cp.open("begSer",2000);
               serialPort=(SerialPort)cpe;
                try {
                    serialPort.setSerialPortParams(115200, SerialPort.DATABITS_8,
                            SerialPort.STOPBITS_1,
                            SerialPort.PARITY_NONE);
                } catch (UnsupportedCommOperationException ex) {
                    ex.printStackTrace();
               // System.out.println(cpe.getName());
            } catch (PortInUseException ex) {
                ex.printStackTrace();
        } catch (NoSuchPortException ex) {
            ex.printStackTrace();
    readThread = new Thread(this);
          readThread.start();
     public void run() {
     try {
         Thread.sleep(20000000);
     } catch (InterruptedException e) {}
     * @param args the command line arguments
    public static void main(String[] args) {
        Main reader=new Main();
     public void serialEvent(SerialPortEvent event) {
     switch (event.getEventType()) {
     case SerialPortEvent.BI:
     case SerialPortEvent.OE:
     case SerialPortEvent.FE:
     case SerialPortEvent.PE:
     case SerialPortEvent.CD:
     case SerialPortEvent.CTS:
     case SerialPortEvent.DSR:
     case SerialPortEvent.RI:
     case SerialPortEvent.OUTPUT_BUFFER_EMPTY:
  break;
     case SerialPortEvent.DATA_AVAILABLE:
         byte[] readBuffer = new byte[20];
         try {
          while (inputStream.available() > 0) {
              int numBytes = inputStream.read(readBuffer);
          System.out.print(new String(readBuffer));
         } catch (IOException e) {}
         break;
    Thread readThread;
    CommPortIdentifier cp;
    CommPort cpe;
    SerialPort serialPort;
    InputStream inputStream;
}and is there options that i have to make with my serial in pc
Thanks in advance

Answer 1

So what's the problem?