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parallelport

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CANSU

Posts: 1
Nickname: cansu
Registered: Jan, 2003

parallelport

Posted: Jan 22, 2003 4:11 PM

hi!
I ve a very big problem ..i want to control a steppermotor with java.but firstly i have to succeed in sending some data to parallel port with below codes .
this program is compiled and when i run it, doesn t give any error.but i m sure that there is some problem in that line --> DOSone.write(5);

I tested with assembly.and i saw that this codes have mistake.because no data were sent to parallel port ,after program run(actually, 5 must be sent).But as i sad, there is no error while compiling or running.if you look and find where the mistake is,i ll be so happy..bacause this is my term project..
thanks a lot..

import java.io.*;
import java.util.*;
import javax.comm.*;
import java.lang.*;

class ParallelWrite
{
static Enumeration portListesi;
static CommPortIdentifier portId;
static ParallelPort parPort;
static OutputStream outputstream;
static OutputStreamWriter DOSone;

public static void main (String arg[])
{
portListesi = CommPortIdentifier.getPortIdentifiers();
while (portListesi.hasMoreElements())
{
portId = (CommPortIdentifier) portListesi.nextElement();
if((portId.getPortType()==CommPortIdentifier.PORT_PA RALLEL)&&((portId.getName()).compareTo("LPT1")==0))
{
try
{
parPort = (ParallelPort) portId.open("Parallel Test", 3000);

try
{
DOSone = new OutputStreamWriter(parPort.getOutputStream());
}catch(IOException e){}
try
{
DOSone.write(5);
DOSone.close();
parPort.close();
}catch(IOException e){}

} catch (PortInUseException e) {
System.err.println(e.toString());
System.exit(1);
}
}
}
}
}

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