Parallel Communications

From Rxtx

Revision as of 05:47, 2 December 2006 (view source) Ajmas (Talk | contribs) m ← Older edit		Revision as of 01:39, 21 June 2007 (view source) 144.212.220.94 (Talk) Newer edit →
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		+	From Rxtx
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	Follows is a code example showing how to communicate using the parallel port.		Follows is a code example showing how to communicate using the parallel port.
-	<pre>
	import gnu.io.CommPortIdentifier;		import gnu.io.CommPortIdentifier;
	import gnu.io.NoSuchPortException;		import gnu.io.NoSuchPortException;
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	}		}
	}		}
-	</pre>

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Revision as of 01:39, 21 June 2007

From Rxtx

Follows is a code example showing how to communicate using the parallel port.

import gnu.io.CommPortIdentifier; import gnu.io.NoSuchPortException; import gnu.io.ParallelPort; import gnu.io.PortInUseException;

import java.io.IOException; import java.io.OutputStream;

import sun.io.CharToByteConverter;

public class ParallelCommunication {

   private static OutputStream outputStream;;
   private static ParallelPort parallelPort;
   private static CommPortIdentifier port;

   // CONSTANTS
   public static final String PARALLEL_PORT = "LPT1";

   public static final String[] PORT_TYPE = { "Serial Port", "Parallel Port" };

   // these commands are specific for my printer around the text

private static String printerCodes = "<n>HelloWorld!

"; public static void main(String[] args) { System.out.println("Started test...."); try { // get the parallel port connected to the printer port = CommPortIdentifier.getPortIdentifier(PARALLEL_PORT); System.out.println("\nport.portType = " + port.getPortType()); System.out.println("port type = " + PORT_TYPE[port.getPortType() - 1]); System.out.println("port.name = " + port.getName()); // open the parallel port -- open(App name, timeout) parallelPort = (ParallelPort) port.open("CommTest", 50); outputStream = parallelPort.getOutputStream(); char[] charArray = printerCodes.toCharArray(); byte[] byteArray = CharToByteConverter.getConverter("UTF8") .convertAll(charArray); System.out.println("Write..."); outputStream.write(byteArray); System.out.println("Flush..."); outputStream.flush(); System.out.println("Close..."); outputStream.close(); } catch (NoSuchPortException nspe) { System.out.println("\nPrinter Port LPT1 not found : " + "NoSuchPortException.\nException:\n" + nspe + "\n"); } catch (PortInUseException piue) { System.out.println("\nPrinter Port LPT1 is in use : " + "PortInUseException.\nException:\n" + piue + "\n"); } /* * catch (UnsupportedCommOperationException usce) { * System.out.println("\nPrinter Port LPT1 fail to write : * UnsupportedCommException.\nException:\n" + usce + "\n"); } */ catch (IOException ioe) { System.out.println("\nPrinter Port LPT1 failed to write : " + "IOException.\nException:\n" + ioe + "\n"); } catch (Exception e) { System.out .println("\nFailed to open Printer Port LPT1 with exeception : " + e + "\n"); } finally { if (port != null && port.isCurrentlyOwned()) { parallelPort.close(); } System.out.println("Closed all resources.\n"); } } }