nxtOSEK/lejos_nxj/samples/BTConnectTest/BTConnectTest.java

   1 import java.io.IOException;\r
   2 \r
   3 import lejos.nxt.*;\r
   4 import lejos.nxt.comm.*;\r
   5 import java.io.*;\r
   6 \r
   7 /**\r
   8  * \r
   9  * Test of NXT to NXT Bluetooth comms.\r
  10  * \r
  11  * Connects to another NXT, sends 100 ints, and receives the \r
  12  * replies. Then closes the connection and shuts down.\r
  13  * \r
  14  * Works with the BTReceive sample running on the slave NXT.\r
  15  * \r
  16  * Change the name string to the name of your slave NXT, and make sure\r
  17  * it is in the known devices list of the master NXT. To do this, turn\r
  18  * on the slave NXT and make sure Bluetooth is on and the device\r
  19  * is visible. Use the Bluetooth menu on the slave for this. Then,\r
  20  * on the master, select the Bluetooth menu and then select Search.\r
  21  * The name of the slave NXT should appear. Select Add to add\r
  22  * it to the known devices of the master. You can check this has\r
  23  * been done by selecting Devices from the Bluetooth menu on the\r
  24  * master.\r
  25  * \r
  26  * @author Lawrie Griffiths\r
  27  *\r
  28  */\r
  29 public class BTConnectTest {\r
  30         public static void main(String[] args) throws Exception {\r
  31                 String name = "NXT";\r
  32                 \r
  33                 LCD.drawString("Connecting...", 0, 0);\r
  34                 LCD.refresh();\r
  35                 \r
  36                 BTRemoteDevice btrd = Bluetooth.getKnownDevice(name);\r
  37 \r
  38                 if (btrd == null) {\r
  39                         LCD.clear();\r
  40                         LCD.drawString("No such device", 0, 0);\r
  41                         LCD.refresh();\r
  42                         Thread.sleep(2000);\r
  43                         System.exit(1);\r
  44                 }\r
  45                 \r
  46                 BTConnection btc = Bluetooth.connect(btrd);\r
  47                 \r
  48                 if (btc == null) {\r
  49                         LCD.clear();\r
  50                         LCD.drawString("Connect fail", 0, 0);\r
  51                         LCD.refresh();\r
  52                         Thread.sleep(2000);\r
  53                         System.exit(1);\r
  54                 }\r
  55                 \r
  56                 LCD.clear();\r
  57                 LCD.drawString("Connected", 0, 0);\r
  58                 LCD.refresh();\r
  59                 \r
  60                 DataInputStream dis = btc.openDataInputStream();\r
  61                 DataOutputStream dos = btc.openDataOutputStream();\r
  62                                 \r
  63                 for(int i=0;i<100;i++) {\r
  64                         try {\r
  65                                 LCD.drawInt(i*30000, 8, 0, 2);\r
  66                                 LCD.refresh();\r
  67                                 dos.writeInt(i*30000);\r
  68                                 dos.flush();                    \r
  69                         } catch (IOException ioe) {\r
  70                                 LCD.drawString("Write Exception", 0, 0);\r
  71                                 LCD.refresh();\r
  72                         }\r
  73                         \r
  74                         try {\r
  75                                 LCD.drawInt(dis.readInt(),8, 0,3);\r
  76                                 LCD.refresh();\r
  77                         } catch (IOException ioe) {\r
  78                                 LCD.drawString("Read Exception ", 0, 0);\r
  79                                 LCD.refresh();\r
  80                         }\r
  81                 }\r
  82                 \r
  83                 try {\r
  84                         LCD.drawString("Closing...    ", 0, 0);\r
  85                         LCD.refresh();\r
  86                         dis.close();\r
  87                         dos.close();\r
  88                         btc.close();\r
  89                 } catch (IOException ioe) {\r
  90                         LCD.drawString("Close Exception", 0, 0);\r
  91                         LCD.refresh();\r
  92                 }\r
  93                 \r
  94                 LCD.clear();\r
  95                 LCD.drawString("Finished",3, 4);\r
  96                 LCD.refresh();\r
  97                 Thread.sleep(2000);\r
  98         }\r
  99 }\r