git.gag.com Git - fw/altos/blob - altoslib/AltosIdleReader.java

   1 /*
   2  * Copyright © 2016 Keith Packard <keithp@keithp.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   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.altoslib_11;
  20
  21 import java.text.*;
  22 import java.io.*;
  23 import java.util.concurrent.*;
  24
  25 public class AltosIdleReader extends AltosFlightReader {
  26         AltosLink       link;
  27         boolean         remote;
  28         AltosState      state = null;
  29         AltosIdleFetch  fetch;
  30         long            next_millis;
  31         static final long       report_interval = 5 * 1000;
  32         static final long       minimum_delay = 1 * 1000;
  33
  34         private void start_link() throws InterruptedException, TimeoutException {
  35                 if (remote) {
  36                         link.start_remote();
  37                 } else
  38                         link.flush_input();
  39         }
  40
  41         private boolean stop_link() throws InterruptedException, TimeoutException {
  42                 if (remote)
  43                         link.stop_remote();
  44                 return link.reply_abort;
  45         }
  46
  47         public AltosState read() throws InterruptedException, ParseException, AltosCRCException, IOException {
  48                 boolean worked = false;
  49                 boolean aborted = false;
  50
  51                 long    delay = next_millis - System.currentTimeMillis();
  52
  53                 if (delay > 0)
  54                         Thread.sleep(delay);
  55                 next_millis = System.currentTimeMillis() + report_interval;
  56                 try {
  57                         try {
  58                                 start_link();
  59                                 if (state == null)
  60                                         state = new AltosState(new AltosCalData(link.config_data()));
  61                                 fetch.provide_data(state, state.cal_data);
  62                                 if (!link.has_error && !link.reply_abort)
  63                                         worked = true;
  64                         } catch (TimeoutException te) {
  65                         } catch (AltosUnknownProduct ue) {
  66                                 worked = true;
  67                         }
  68                 } finally {
  69                         try {
  70                                 aborted = stop_link();
  71                         } catch (TimeoutException te) {
  72                                 aborted = true;
  73                         }
  74                         if (worked) {
  75                                 if (remote) {
  76                                         try {
  77                                                 state.set_rssi(link.rssi(), 0);
  78                                         } catch (TimeoutException te) {
  79                                                 state.set_rssi(0, 0);
  80                                         }
  81                                 }
  82                         }
  83                 }
  84
  85                 long    finish = System.currentTimeMillis();
  86
  87                 if (next_millis - finish < minimum_delay)
  88                         next_millis = finish + minimum_delay;
  89
  90                 return state;
  91         }
  92
  93         public void close(boolean interrupted) {
  94                 try {
  95                         link.close();
  96                 } catch (InterruptedException ie) {
  97                 }
  98         }
  99
 100         public void set_frequency(double frequency) throws InterruptedException, TimeoutException {
 101                 link.set_radio_frequency(frequency);
 102         }
 103
 104         public void save_frequency() {
 105                 AltosPreferences.set_frequency(link.serial, link.frequency);
 106         }
 107
 108         public void set_callsign(String callsign) throws InterruptedException, TimeoutException {
 109                 link.set_callsign(callsign);
 110         }
 111
 112         public AltosIdleReader (AltosLink link, boolean remote)
 113                 throws IOException, InterruptedException, TimeoutException {
 114                 this.link = link;
 115                 this.remote = remote;
 116                 this.next_millis = System.currentTimeMillis();
 117                 fetch = new AltosIdleFetch(link);
 118         }
 119 }