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   1 /*
   2  * Copyright © 2011 Keith Packard <keithp@keithp.com>
   3  * Copyright © 2012 Mike Beattie <mike@ethernal.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; version 2 of the License.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  17  */
  18
  19 package org.altusmetrum.AltosDroid;
  20
  21 import java.io.IOException;
  22 import java.io.InputStream;
  23 import java.io.OutputStream;
  24 import java.util.UUID;
  25
  26 import android.bluetooth.BluetoothAdapter;
  27 import android.bluetooth.BluetoothDevice;
  28 import android.bluetooth.BluetoothSocket;
  29 import android.os.Bundle;
  30 import android.os.Handler;
  31 import android.os.Message;
  32 import android.util.Log;
  33
  34 import org.altusmetrum.AltosLib.*;
  35
  36 public class AltosBluetooth extends AltosLink {
  37
  38         // Debugging
  39         private static final String TAG = "AltosBluetooth";
  40         private static final boolean D = true;
  41
  42         private ConnectThread    connect_thread = null;
  43         private Thread           input_thread   = null;
  44
  45         private Handler          handler;
  46
  47         private BluetoothAdapter adapter;
  48         private BluetoothDevice  device;
  49         private BluetoothSocket  socket;
  50         private InputStream      input;
  51         private OutputStream     output;
  52
  53         // Constructor
  54         public AltosBluetooth(BluetoothDevice in_device, Handler in_handler) {
  55                 adapter = BluetoothAdapter.getDefaultAdapter();
  56                 device = in_device;
  57                 handler = in_handler;
  58
  59                 connect_thread = new ConnectThread(device);
  60                 connect_thread.start();
  61
  62                 input_thread = new Thread(this);
  63                 input_thread.start();
  64         }
  65
  66         private class ConnectThread extends Thread {
  67                 private final UUID SPP_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
  68
  69                 public ConnectThread(BluetoothDevice device) {
  70                         BluetoothSocket tmp_socket = null;
  71
  72                         try {
  73                                 tmp_socket = device.createInsecureRfcommSocketToServiceRecord(SPP_UUID);
  74                         } catch (IOException e) {
  75                                 e.printStackTrace();
  76                         }
  77                         socket = tmp_socket;
  78                 }
  79
  80                 public void run() {
  81                         if (D) Log.i(TAG, "ConnectThread: BEGIN");
  82                         setName("ConnectThread");
  83
  84                         // Always cancel discovery because it will slow down a connection
  85                         adapter.cancelDiscovery();
  86
  87                         synchronized (AltosBluetooth.this) {
  88                                 // Make a connection to the BluetoothSocket
  89                                 try {
  90                                         // This is a blocking call and will only return on a
  91                                         // successful connection or an exception
  92                                         socket.connect();
  93
  94                                         input = socket.getInputStream();
  95                                         output = socket.getOutputStream();
  96                                 } catch (IOException e) {
  97                                         // Close the socket
  98                                         try {
  99                                                 socket.close();
 100                                         } catch (IOException e2) {
 101                                                 if (D) Log.e(TAG, "ConnectThread: Failed to close() socket after failed connection");
 102                                         }
 103                                         input = null;
 104                                         output = null;
 105                                         AltosBluetooth.this.notifyAll();
 106                                         if (D) Log.e(TAG, "ConnectThread: Failed to establish connection");
 107                                         return;
 108                                 }
 109
 110                                 // Configure the newly connected device for telemetry
 111                                 print("~\nE 0\n");
 112                                 set_monitor(false);
 113
 114                                 // Reset the ConnectThread because we're done
 115                                 connect_thread = null;
 116
 117                                 // Send the device name back to the Telemetry Service
 118                                 name = device.getName();
 119                                 Message msg = handler.obtainMessage(TelemetryService.MSG_CONNECTED);
 120                                 Bundle b  = new Bundle();
 121                                 b.putString(TelemetryService.KEY_DEVNAME, name);
 122                                 msg.setData(b);
 123                                 handler.sendMessage(msg);
 124
 125                                 // Notify other waiting threads, now that we're connected
 126                                 AltosBluetooth.this.notifyAll();
 127
 128                                 if (D) Log.i(TAG, "ConnectThread: Connect completed");
 129                         }
 130                 }
 131
 132                 public void cancel() {
 133                         try {
 134                                 if (socket != null)
 135                                         socket.close();
 136                         } catch (IOException e) {
 137                                 if (D) Log.e(TAG, "ConnectThread: close() of connect socket failed", e);
 138                         }
 139                 }
 140         }
 141
 142         private synchronized void wait_connected() throws InterruptedException, IOException {
 143                 if (D) Log.i(TAG, "wait_connected(): begin");
 144                 if (input == null) {
 145                         if (D) Log.i(TAG, "wait_connected(): waiting");
 146                         wait();
 147                         if (D) Log.i(TAG, "wait_connected(): wait ended..");
 148                         if (input == null) throw new IOException();
 149                 }
 150         }
 151
 152         private void connection_failed() {
 153                 if (D) Log.e(TAG, "Bluetooth Socket IO failed!");
 154         }
 155
 156         public void print(String data) {
 157                 byte[] bytes = data.getBytes();
 158                 if (D) Log.i(TAG, "print(): begin");
 159                 try {
 160                         wait_connected();
 161                         output.write(bytes);
 162                         if (D) Log.i(TAG, "print(): Wrote bytes: '" + data.replace('\n', '\\') + "'");
 163                 } catch (IOException e) {
 164                         connection_failed();
 165                 } catch (InterruptedException e) {
 166                         connection_failed();
 167                 }
 168         }
 169
 170         public int getchar() {
 171                 if (D) Log.i(TAG, "getchar(): begin");
 172                 try {
 173                         wait_connected();
 174                         if (D) Log.i(TAG, "getchar(): proceeding");
 175                         return input.read();
 176                 } catch (IOException e) {
 177                         connection_failed();
 178                 } catch (java.lang.InterruptedException e) {
 179                         connection_failed();
 180                 }
 181                 return AltosLink.ERROR;
 182         }
 183
 184         public void close() {
 185                 if (D) Log.i(TAG, "close(): begin");
 186                 synchronized(this) {
 187                         if (D) Log.i(TAG, "close(): synched");
 188
 189                         if (connect_thread != null) {
 190                                 if (D) Log.i(TAG, "close(): stopping connect_thread");
 191                                 connect_thread.cancel();
 192                                 connect_thread = null;
 193                         }
 194                         if (D) Log.i(TAG, "close(): Closing socket");
 195                         try {
 196                                 socket.close();
 197                         } catch (IOException e) {
 198                                 if (D) Log.e(TAG, "close(): unable to close() socket");
 199                         }
 200                         if (input_thread != null) {
 201                                 if (D) Log.i(TAG, "close(): stopping input_thread");
 202                                 try {
 203                                         if (D) Log.i(TAG, "close(): input_thread.interrupt().....");
 204                                         input_thread.interrupt();
 205                                         if (D) Log.i(TAG, "close(): input_thread.join().....");
 206                                         input_thread.join();
 207                                 } catch (Exception e) {}
 208                                 input_thread = null;
 209                         }
 210                         input = null;
 211                         output = null;
 212                         notifyAll();
 213                 }
 214         }
 215
 216
 217         //public void flush_output() { super.flush_output(); }
 218
 219         public boolean can_cancel_reply()   { return false; }
 220         public boolean show_reply_timeout() { return true; }
 221         public void hide_reply_timeout()    { }
 222
 223 }