Comment on Tutorial - Sample Java program shows how to write to COM port using Java. By Johanes



Comment Added by : Anonymous

Comment Added at : 2013-03-29 02:39:00

Comment on Tutorial : Sample Java program shows how to write to COM port using Java. By Johanes
import gnu.io.*;
import java.io.*;


public class ListPortClass implements SerialPortEventListener
{

public static void main(String[] s)
{
try
{
CommPortIdentifier portIdentifier = CommPortIdentifier.getPortIdentifier(\"/dev/ttyS0\");
if (portIdentifier.isCurrentlyOwned())
System.out.println(\"Port in use!\");

else {
System.out.println(portIdentifier.getName());

SerialPort serialPort = (SerialPort) portIdentifier.open(\"ListPortClass\",300);
int b = serialPort.getBaudRate();
System.out.println(Integer.toString(b));
serialPort.setSerialPortParams(9600, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);
serialPort.setFlowControlMode(SerialPort.FLOWCONTROL_NONE);
serialPort.notifyOnCarrierDetect(true);

serialPort.setOutputBufferSize(100);
serialPort.setInputBufferSize(1000);
serialPort.addEventListener(new ListPortClass());
OutputStream mOutputToPort = serialPort.getOutputStream();

InputStream mInputFromPort = serialPort.getInputStream();
PrintWriter pr=new PrintWriter(mOutputToPort);
FileReader fr=new FileReader(\"/root/Desktop/satya/input.txt\");
BufferedReader br =new BufferedReader(fr);
String st=br.readLine();
System.out.print(st);
mOutputToPort.flush();
mOutputToPort.flush();
System.out.println(\"beginning to Write . \\r\\n\");
mOutputToPort.write((\"$B\").getBytes());

System.out.println(\" Written to Port. \\r\\n\");
mOutputToPort.flush();
System.out.println(\"Waiting for Reply \\r\\n\");

//Thread.sleep(50);
System.out.println(mInputFromPort.available());
byte mBytesIn [] = new byte[20];
int n=mInputFromPort.read(mBytesIn);
//mInputFromPort.read(mBytesIn);
String value = new String(mBytesIn);
System.out.println(\"Response from Serial Device: \"+value);
mOutputToPort.close();
mInputFromPort.close();
}
}
catch (Exception ex)
{
System.out.println(\"Exception : \" + ex.getMessage());
}

}


@Override
public void serialEvent(SerialPortEvent spe) {
System.out.println(\"data available\");
}
}


This is my java code for Communicate with ETIM machine....
whenever the machine gets the data of input.txt file, it gives the output as its version .

But while excecuting this code, machine not giving any response back...please solve my problem...

my OS:LINUX


View Tutorial



Subscribe to Tutorials

Related Tutorials

Program using concept of byte long short and int in java

Update contents of a file within a jar file

Tomcat and httpd configured in port 8080 and 80

Java File

Java String

Count number of vowels, consonants and digits in a String in Java

Reverse a number in Java

Student marks calculation program in Java

Handling Fractions in Java

Calculate gross salary in Java

Calculate average sale of the week in Java

Vector in Java - Sample Program

MultiLevel Inheritance sample in Java

Multiple Inheritance sample in Java

Java program using Method Overriding

Archived Comments

1. plz send me 1 ex that will explain how to use conn
View Tutorial          By: abhijit marne at 2011-12-09 06:32:07

2. Muchas Gracias, me ha servido de mucho el aporte.<
View Tutorial          By: Juan Carlos at 2009-03-25 18:11:37

3. After coming to second page again I want to go to
View Tutorial          By: Bhagi at 2012-09-23 06:25:54

4. wow amzing
View Tutorial          By: Anonymous at 2009-04-23 01:44:43

5. Could you somehow use the substring method to pars
View Tutorial          By: Eric at 2009-04-26 19:20:26

6. Performance is low while working with BULK DATA
View Tutorial          By: kailash at 2009-07-17 06:11:55

7. can anybody suggest me to write a java prog. to ke
View Tutorial          By: Giri at 2015-03-23 17:56:58

8. I am java developer and interested to write scjp e
View Tutorial          By: Parvathi at 2013-07-05 14:24:08

9. This is by far the easiest way I have yet seem, ma
View Tutorial          By: doahh at 2010-03-08 11:23:48

10. nice one
View Tutorial          By: dhusor at 2012-05-08 17:38:50