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_12;
  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         AltosCalData    cal_data = null;
  29         AltosState      state = null;
  30         AltosIdleFetch  fetch;
  31         long            next_millis;
  32         static final long       report_interval = 5 * 1000;
  33         static final long       minimum_delay = 1 * 1000;
  34
  35         private void start_link() throws InterruptedException, TimeoutException {
  36                 if (remote) {
  37                         link.start_remote();
  38                 } else
  39                         link.flush_input();
  40         }
  41
  42         private boolean stop_link() throws InterruptedException, TimeoutException {
  43                 if (remote)
  44                         link.stop_remote();
  45                 return link.reply_abort;
  46         }
  47
  48         public AltosCalData cal_data() {
  49                 if (cal_data == null) {
  50                         try {
  51                                 cal_data = new AltosCalData(link.config_data());
  52                         } catch (InterruptedException ie) {
  53                         } catch (TimeoutException te) {
  54                         }
  55                         if (cal_data == null)
  56                                 cal_data = new AltosCalData();
  57                 }
  58                 return cal_data;
  59         }
  60
  61         public AltosState read() throws InterruptedException, ParseException, AltosCRCException, IOException {
  62                 boolean worked = false;
  63                 boolean aborted = false;
  64
  65                 long    delay = next_millis - System.currentTimeMillis();
  66
  67                 if (delay > 0)
  68                         Thread.sleep(delay);
  69                 next_millis = System.currentTimeMillis() + report_interval;
  70                 try {
  71                         try {
  72                                 start_link();
  73                                 if (state == null)
  74                                         state = new AltosState(cal_data());
  75                                 fetch.provide_data(state, state.cal_data);
  76                                 if (!link.has_error && !link.reply_abort)
  77                                         worked = true;
  78                         } catch (TimeoutException te) {
  79                         } catch (AltosUnknownProduct ue) {
  80                                 worked = true;
  81                         }
  82                 } finally {
  83                         try {
  84                                 aborted = stop_link();
  85                         } catch (TimeoutException te) {
  86                                 aborted = true;
  87                         }
  88                         if (worked) {
  89                                 if (remote) {
  90                                         try {
  91                                                 state.set_rssi(link.rssi(), 0);
  92                                         } catch (TimeoutException te) {
  93                                                 state.set_rssi(0, 0);
  94                                         }
  95                                 }
  96                         }
  97                 }
  98
  99                 long    finish = System.currentTimeMillis();
 100
 101                 if (next_millis - finish < minimum_delay)
 102                         next_millis = finish + minimum_delay;
 103
 104                 return state;
 105         }
 106
 107         public void close(boolean interrupted) {
 108                 try {
 109                         link.close();
 110                 } catch (InterruptedException ie) {
 111                 }
 112         }
 113
 114         public void set_frequency(double frequency) throws InterruptedException, TimeoutException {
 115                 link.set_radio_frequency(frequency);
 116         }
 117
 118         public void save_frequency() {
 119                 AltosPreferences.set_frequency(link.serial, link.frequency);
 120         }
 121
 122         public void set_callsign(String callsign) throws InterruptedException, TimeoutException {
 123                 link.set_callsign(callsign);
 124         }
 125
 126         public AltosIdleReader (AltosLink link, boolean remote)
 127                 throws IOException, InterruptedException, TimeoutException {
 128                 this.link = link;
 129                 this.remote = remote;
 130                 this.next_millis = System.currentTimeMillis();
 131                 fetch = new AltosIdleFetch(link);
 132         }
 133 }