Interface Java porta paralela
Enviado: 17 Abr 2007 13:23Olá passoal, tudo bem? espero q sim. estou tendo q fazer um projeto p/ a faculdade em JAVA e estou tentando usar a porta paralela p/ aciona uma placa leds, já tenho o programa, já instalei a API javax.comm e na hora de rodar o programa esta aparecendo alguns erro e não acontece na na placa led, segue-se abaixo o programa.
java code
O erro q esta aparecendo é esse aqui:
bem espero q alguém possa me indicar um caminho pois não sei mais por onde ir nesse projetinho, Ah estou usando o NetBeans e windows XP.
Desde de já agradeço a atenção de todos, MECA.
java code
import parport.ParallelPort;
import java.awt.*;
import java.io.*;
import javax.comm.*;
class SimpleIO {
public static void main (String[] args){
int Bit = 1;
ParallelPort Lpt1 = new ParallelPort(0x378);
Lpt1.write(Bit);
}
}
package parport;
public class ParallelPort {
/** The port base address (e.g. 0x378 is base address for LPT1) */
private int portBase;
/** To cunstruct a ParallelPort object,
* you need the port base address
*/
public ParallelPort (int portBase)
{
this.portBase = portBase;
}
/** Reads one byte from the STATUS pins of the parallel port.
*
* The byte read contains 5 valid bits, corresponing to 5 pins of input
* from the STATUS pins of the parallel port (the STATUS is located
* at "portBase + 1", e.g. the STATUS address for LPT1 is 0x379).
*
* This diagram shows the content of the byte:
*
* Bit | Pin # | Printer Status | Inverted
* -----+-------+-----------------+-----------
* 7 | ~11 | Busy | Yes
* 6 | 10 | Acknowledge |
* 5 | 12 | Out of paper |
* 4 | 13 | Selected |
* 3 | 15 | I/O error |
*
* Note that Pin 11 is inverted, this means that "Hi" input on pin
* means 0 on bit 7, "Low" input on pin means 1 on bit 7.
*/
public int read ()
{
return ParallelPort.readOneByte (this.portBase+1);
}
/** Writes one byte to the DATA pins of parallel port.
* The byte is written to the DATA pins of the port. The DATA pins are
* located at the base address of the port (e.g. DATA address for LPT1
* is 0x378).
*
* This diagram shows how the byte is written:
*
* Bit | Pin # | Printer DATA
* -----+-------+--------------
* 7 | 9 | DATA 7
* 6 | 8 | DATA 6
* 5 | 7 | DATA 5
* 4 | 6 | DATA 4
* 3 | 5 | DATA 3
* 2 | 4 | DATA 2
* 1 | 3 | DATA 1
* 0 | 2 | DATA 0
*/
public void write (int oneByte)
{
ParallelPort.writeOneByte (this.portBase, oneByte);
}
/** Reads one byte from the specified address.
* (normally the address is the STATUS pins of the port)
*/
public static native int readOneByte (int address);
/** Writes one byte to the specified address
* (normally the address is the DATA pins of the port)
*/
public static native void writeOneByte (int address, int oneByte);
static
{
System.loadLibrary("parport");
}
}
O erro q esta aparecendo é esse aqui:
init:
deps-jar:
Compiling 2 source files to C:\Documents and Settings\ExercicioJava\SimpleIO\build\classes
compile:
run:
Exception in thread "main" java.lang.UnsatisfiedLinkError: no parport in java.library.path
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1682)
at java.lang.Runtime.loadLibrary0(Runtime.java:822)
at java.lang.System.loadLibrary(System.java:992)
at parport.ParallelPort.<clinit>(ParallelPort.java:75)
at SimpleIO.main(Main.java:12)
Java Result: 1
BUILD SUCCESSFUL (total time: 0 seconds)
bem espero q alguém possa me indicar um caminho pois não sei mais por onde ir nesse projetinho, Ah estou usando o NetBeans e windows XP.
Desde de já agradeço a atenção de todos, MECA.