android/src/GlueVoltage.java

   1 /*
   2   Copyright_License {
   3
   4   XCSoar Glide Computer - http://www.xcsoar.org/
   5   Copyright (C) 2000-2012 The XCSoar Project
   6   A detailed list of copyright holders can be found in the file "AUTHORS".
   7
   8   This program is free software; you can redistribute it and/or
   9   modify it under the terms of the GNU General Public License
  10   as published by the Free Software Foundation; either version 2
  11   of the License, or (at your option) any later version.
  12
  13   This program is distributed in the hope that it will be useful,
  14   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16   GNU General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with this program; if not, write to the Free Software
  20   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  21   }
  22 */
  23
  24 package org.xcsoar;
  25
  26 import ioio.lib.api.IOIO;
  27 import ioio.lib.api.exception.ConnectionLostException;
  28
  29 /*
  30  * A driver for voltage measurement on the IOIO board.
  31  */
  32 final class GlueVoltage implements IOIOConnectionListener {
  33   private IOIOConnectionHolder holder;
  34   private final Voltage.Listener listener;
  35   int sample_rate;
  36   private Voltage instance;
  37
  38   GlueVoltage(IOIOConnectionHolder _holder, int _sample_rate,
  39              Voltage.Listener _listener) {
  40     listener = _listener;
  41     sample_rate = _sample_rate;
  42     holder = _holder;
  43     _holder.addListener(this);
  44   }
  45
  46   public void close() {
  47     IOIOConnectionHolder holder;
  48     synchronized(this) {
  49       holder = this.holder;
  50       this.holder = null;
  51     }
  52
  53     if (holder != null)
  54       holder.removeListener(this);
  55   }
  56
  57   @Override public void onIOIOConnect(IOIO ioio)
  58     throws ConnectionLostException, InterruptedException {
  59     instance = new Voltage(ioio, sample_rate, listener);
  60   }
  61
  62   @Override public void onIOIODisconnect() {
  63     if (instance == null)
  64       return;
  65
  66     instance.close();
  67     instance = null;
  68   }
  69 }