Need to open a Parallel port...Help!
Dear all,
Currently, I need to write a program that will read data from a parallel port. The hardware that consists of a temperature sensor is connected to the parallel port. And I need to construct a program that will read data from the port.
So far, i've managed to identify the ports on my machine. The code for identifying the ports is:
/* Files: ReadPort.java */
import javax.comm.CommPortIdentifier;
import java.util.Enumeration;
import javax.comm.CommDriver.*;
public class ReadPort
{
/** Port Identifier. */
static CommPortIdentifier portId;
/** Container of the present ports. */
static Enumeration portList;
public static void main(String[] args)
{
String driverName = "com.sun.comm.Win32Driver";
try{
javax.comm.CommDriver commdriver = (javax.comm.CommDriver)Class.forName(driverName).newInstance();
commdriver.initialize();
}
catch (Exception e2)
{
e2.printStackTrace();
}
// demand present ports.
portList = CommPortIdentifier.getPortIdentifiers();
// this cycle allows to capture one to one the found ports.
while (portList.hasMoreElements())
{
// Port Identifier.
portId = (CommPortIdentifier) portList.nextElement();
// view the port.
System.out.println("Port --> " + portId.getName());
}
try
{
CommPortIdentifier.getPortIdentifier("COM2");
}
catch(Exception e)
{
System.out.println("ERROR " +e);
}
System.out.println("Done");
}
}
I know on my machine that i have a parallel port. Now i have to open the parallel port, and i'm having problems knowing how to. Can anyone help me construct a piece of code to open a parallel port using javax.comm? Even some code would be really helpful.
Regards,
Raheal
