Comm serial API CR LF Problem

Question

Hello People,
I am trying to send :
<ID01>toms messsage [cr] [lf]
to the serail port using the comm API. (To an LED display unit)
How do I send the ASCI codes for [cr] [lf]???
I tryed this : (changes the SimpleWrite.java, that comes with the comm API are marked)
import java.io.*;
import java.util.*;
import javax.comm.*;
public class SimpleWrite {
static Enumeration portList;
static CommPortIdentifier portId;
static String messageString = ("<ID01><PA>TOM HELLO");
static SerialPort serialPort;
static OutputStream outputStream;
static char myEnterChar = '\n';<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
public static void main(String[] args) {
portList = CommPortIdentifier.getPortIdentifiers();
while (portList.hasMoreElements()) {
portId = (CommPortIdentifier) portList.nextElement();
if (portId.getPortType() == CommPortIdentifier.PORT_SERIAL) {
// if (portId.getName().equals("COM1")) {
if (portId.getName().equals("/dev/term/a")) {
try {
serialPort = (SerialPort)
portId.open("SimpleWriteApp", 2000);
} catch (PortInUseException e) {}
try {
outputStream = serialPort.getOutputStream();
} catch (IOException e) {}
try {
serialPort.setSerialPortParams(9600,
SerialPort.DATABITS_8,
SerialPort.STOPBITS_1,
SerialPort.PARITY_NONE);
} catch (UnsupportedCommOperationException e) {}
try {
outputStream.write(messageString.getBytes() );
outputStream.write(myEnterChar);
outputStream.write(myEnterChar);<<<<<<<<<
} catch (IOException e) {}

Answer 1

RobertWhite1, you are a hero! It works fine, here is the code for other ppl in the furture :-)
(This is using SDK 1.4.1 by the way, on Com1, to an LED sign, Windows XP)
import java.io.*;
import java.util.*;
import javax.comm.*;
public class SimpleWrite {
static Enumeration portList;
static CommPortIdentifier portId;
static String messageString = ("<ID01><PA>:-) :-) :-) :-) :-) :-) :-) :-) "+ (char)13 + (char)10+ (char)13 + (char)10);
static SerialPort serialPort;
static OutputStream outputStream;
static char myEnterChar = '\n';
static char CarrR = (char)13;
static char LineF = (char)10;
public static void main(String[] args) {
portList = CommPortIdentifier.getPortIdentifiers();
while (portList.hasMoreElements()) {
portId = (CommPortIdentifier) portList.nextElement();
if (portId.getPortType() == CommPortIdentifier.PORT_SERIAL) {
if (portId.getName().equals("COM1")) {
//if (portId.getName().equals("/dev/term/a")) {
try {
serialPort = (SerialPort)
portId.open("SimpleWriteApp", 2000);
} catch (PortInUseException e) {System.out.println(e);}
try {
outputStream = serialPort.getOutputStream();
} catch (IOException e) {System.out.println(e);}
try {
serialPort.setSerialPortParams(9600,
SerialPort.DATABITS_8,
SerialPort.STOPBITS_1,
SerialPort.PARITY_NONE);
} catch (UnsupportedCommOperationException e) {System.out.println(e);}
try {
outputStream.write(messageString.getBytes() );
//outputStream.write(myEnterChar);
//outputStream.write(myEnterChar);
outputStream.write(CarrR+LineF+CarrR+LineF);
} catch (IOException e) {System.out.println(e);}