android/src/Voltage.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 android.util.Log;
  27 import ioio.lib.api.IOIO;
  28 import ioio.lib.api.AnalogInput;
  29 import ioio.lib.api.DigitalOutput;
  30 import ioio.lib.api.DigitalInput;
  31 import ioio.lib.api.exception.ConnectionLostException;
  32
  33 /*
  34  * A driver for voltage measurement on the IOIO board.
  35  */
  36 final class Voltage extends Thread {
  37   interface Listener {
  38     /**
  39      * @param raw values from ad converter.
  40      */
  41     void onVoltageValues(int temp_adc, int voltage_index, int volt_adc);
  42     void onVoltageError();
  43   };
  44
  45   private static final String TAG = "XCSoar";
  46
  47   private AnalogInput h_volt;
  48   private AnalogInput h_temp;
  49   private DigitalOutput h_led;
  50   private final int sleeptime;
  51
  52   private final Listener listener;
  53
  54   public Voltage(IOIO ioio, int sample_rate, Listener _listener)
  55     throws ConnectionLostException {
  56     super("Voltage");
  57
  58     // when you want to use other pins: you got the source ....
  59     h_volt = ioio.openAnalogInput(40);
  60     // When pin 39 cannot be pulled-up when used as digital input and is between 0.3 and 0.6 Volt
  61     // when using analog input then assume there is a kty83 temperature sensor there.
  62     DigitalInput h_di = ioio.openDigitalInput(39, DigitalInput.Spec.Mode.PULL_UP);
  63     try {
  64       if (h_di != null && !h_di.read()) {
  65         h_di.close();
  66         h_temp = ioio.openAnalogInput(39);
  67         for (int i=0; h_temp != null && i<100; i++) {
  68           float v = h_temp.getVoltage();
  69           if (v < 0.3 || v > 0.6) { h_temp.close(); h_temp = null; break; }
  70         }
  71       } else {
  72         if (h_di != null) h_di.close();
  73       }
  74     } catch (IllegalStateException e) {
  75     } catch (InterruptedException e) {
  76     } finally {
  77     }
  78
  79     h_led  = ioio.openDigitalOutput(IOIO.LED_PIN);
  80
  81     if (sample_rate != 0)
  82       sleeptime = 60000 / sample_rate;
  83     else
  84       sleeptime = 1000;
  85
  86     listener = _listener;
  87
  88     start();
  89   }
  90
  91   public void close() {
  92     if (h_volt != null)
  93       h_volt.close();
  94     if (h_temp != null)
  95       h_temp.close();
  96     if (h_led != null)
  97       h_led.close();
  98
  99     interrupt();
 100
 101     try {
 102       join();
 103     } catch (InterruptedException e) {
 104     }
 105   }
 106
 107   @Override public void run() {
 108     try {
 109       boolean led = false;
 110       while (true) {
 111         int v = -1; int t = -1;
 112         if (h_volt != null) v = (int)(h_volt.read() * 1024);
 113         if (h_temp != null) t = (int)(h_temp.read() * 1024);
 114         if (h_led  != null) { h_led.write(led); led = !led; }
 115         listener.onVoltageValues(t, 0, v);
 116         sleep(sleeptime);
 117       }
 118     } catch (ConnectionLostException e) {
 119       Log.d(TAG, "Voltage.run() failed", e);
 120     } catch (IllegalStateException e) {
 121       Log.d(TAG, "Voltage.run() failed", e);
 122     } catch (InterruptedException e) {
 123     } finally {
 124       listener.onVoltageError();
 125     }
 126   }
 127 }