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

   1 /*
   2  * Copyright © 2011 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.util.concurrent.*;
  23
  24 public class AltosEepromChunk {
  25
  26         public static final int chunk_size = 256;
  27         public static final int per_line = 8;
  28
  29         public int              data[];
  30         public int              address;
  31         public ParseException   parse_exception = null;
  32
  33         int[] ParseHex(String line) {
  34                 String[] tokens = line.split("\\s+");
  35                 int[] array = new int[tokens.length];
  36
  37                 for (int i = 0; i < tokens.length; i++)
  38                         try {
  39                                 array[i] = Integer.parseInt(tokens[i], 16);
  40                         } catch (NumberFormatException ne) {
  41                                 return null;
  42                         }
  43                 return array;
  44         }
  45
  46         public int data(int offset) {
  47                 return data[offset];
  48         }
  49
  50         public int data16(int offset) {
  51                 return data[offset] | (data[offset + 1] << 8);
  52         }
  53
  54         public int data32(int offset) {
  55                 return data[offset] | (data[offset + 1] << 8) |
  56                         (data[offset+2] << 16) | (data[offset+3] << 24);
  57         }
  58
  59         public boolean erased(int start, int len) {
  60                 for (int i = 0; i < len; i++)
  61                         if (data[start+i] != 0xff)
  62                                 return false;
  63                 return true;
  64         }
  65
  66         public AltosEeprom eeprom(int offset, int log_format, AltosState state) throws ParseException {
  67                 AltosEeprom     eeprom = null;
  68                 switch (log_format) {
  69                 case AltosLib.AO_LOG_FORMAT_FULL:
  70                         eeprom = new AltosEepromTM(this, offset);
  71                         break;
  72                 case AltosLib.AO_LOG_FORMAT_TINY:
  73                         eeprom = new AltosEepromTMini(this, offset, state);
  74                         break;
  75                 case AltosLib.AO_LOG_FORMAT_TELEMETRY:
  76                 case AltosLib.AO_LOG_FORMAT_TELESCIENCE:
  77                         break;
  78                 case AltosLib.AO_LOG_FORMAT_TELEMEGA:
  79                 case AltosLib.AO_LOG_FORMAT_TELEMEGA_OLD:
  80                         eeprom = new AltosEepromMega(this, offset, log_format);
  81                         break;
  82                 case AltosLib.AO_LOG_FORMAT_TELEMETRUM:
  83                         eeprom = new AltosEepromMetrum2(this, offset);
  84                         break;
  85                 case AltosLib.AO_LOG_FORMAT_TELEMINI2:
  86                 case AltosLib.AO_LOG_FORMAT_TELEMINI3:
  87                 case AltosLib.AO_LOG_FORMAT_EASYMINI:
  88                         eeprom = new AltosEepromMini(this, offset);
  89                         break;
  90                 case AltosLib.AO_LOG_FORMAT_TELEGPS:
  91                         eeprom = new AltosEepromGPS(this, offset);
  92                         break;
  93                 case AltosLib.AO_LOG_FORMAT_TELEFIRETWO:
  94                         eeprom = new AltosEepromFireTwo(this, offset);
  95                         break;
  96                 default:
  97                         throw new ParseException("unknown eeprom format " + log_format, 0);
  98                 }
  99                 return eeprom;
 100         }
 101
 102         public AltosEepromChunk(AltosLink link, int block, boolean flush)
 103                 throws TimeoutException, InterruptedException {
 104
 105                 int     offset;
 106
 107                 data = new int[chunk_size];
 108                 address = block * chunk_size;
 109                 if (flush)
 110                         link.flush_input();
 111                 link.printf("e %x\n", block);
 112
 113                 for (offset = 0; offset < chunk_size; offset += per_line) {
 114                         try {
 115                                 String  line = link.get_reply(5000);
 116
 117                                 if (line == null)
 118                                         throw new TimeoutException();
 119
 120                                 int[] values = ParseHex(line);
 121
 122                                 if (values == null || values.length != per_line + 1)
 123                                         throw new ParseException(String.format("invalid line %s", line), 0);
 124                                 if (values[0] != offset)
 125                                         throw new ParseException(String.format("data address out of sync at 0x%x",
 126                                                                                address + offset), 0);
 127                                 for (int i = 0; i < per_line; i++)
 128                                         data[offset + i] = values[1 + i];
 129                         } catch (ParseException pe) {
 130                                 for (int i = 0; i < per_line; i++)
 131                                         data[offset + i] = 0xff;
 132                                 if (parse_exception == null)
 133                                         parse_exception = pe;
 134                         }
 135                 }
 136         }
 137 }