nxtOSEK/lejos_nxj/src/java/classes/lejos/nxt/comm/USBInputStream.java

   1 package lejos.nxt.comm;
   2
   3 import java.io.*;
   4
   5 /**
   6  * Implements an InputStream over USB.
   7  *
   8  * @author Lawrie Griffiths
   9  *
  10  */
  11 public class USBInputStream extends InputStream {
  12         private byte buf[] = new byte[64];
  13         private int bufIdx = -1, bufSize = -1;
  14
  15         public int read() {
  16                 if (bufIdx == bufSize) {
  17                         do {
  18                                 bufSize = USB.usbRead(buf, 64);
  19                         } while (bufSize == 0);
  20                         bufIdx = 0;
  21                 }
  22
  23             return buf[bufIdx++] & 0xFF;
  24         }
  25 }
  26