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

   1 /*
   2  * Copyright © 2013 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; version 2 of the License.
   7  *
   8  * This program is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  16  */
  17
  18 package org.altusmetrum.altoslib_1;
  19
  20 import java.io.*;
  21 import java.util.*;
  22 import java.text.*;
  23
  24 public abstract class AltosEeprom implements AltosStateUpdate {
  25         public int      cmd;
  26         public int      tick;
  27         public int      data8[];
  28         public boolean  valid;
  29
  30         public final static int header_length = 4;
  31
  32         public abstract void update_state(AltosState state);
  33
  34         public void write(PrintStream out) {
  35                 out.printf("%c %04x", cmd, tick);
  36                 if (data8 != null) {
  37                         for (int i = 0; i < data8.length; i++)
  38                                 out.printf (" %02x", data8[i]);
  39                 }
  40                 out.printf ("\n");
  41         }
  42
  43         void parse_chunk(AltosEepromChunk chunk, int start, int record_length) throws ParseException {
  44                 cmd = chunk.data(start);
  45
  46                 int data_length = record_length - header_length;
  47
  48                 valid = !chunk.erased(start, record_length);
  49                 if (valid) {
  50                         if (AltosConvert.checksum(chunk.data, start, record_length) != 0)
  51                                 throw new ParseException(String.format("invalid checksum at 0x%x",
  52                                                                        chunk.address + start), 0);
  53                 } else {
  54                         cmd = AltosLib.AO_LOG_INVALID;
  55                 }
  56
  57                 tick = chunk.data16(start+2);
  58
  59                 data8 = new int[data_length];
  60                 for (int i = 0; i < data_length; i++)
  61                         data8[i] = chunk.data(start + header_length + i);
  62         }
  63
  64         void parse_string(String line, int record_length) {
  65                 valid = false;
  66                 tick = 0;
  67                 cmd = AltosLib.AO_LOG_INVALID;
  68
  69                 int data_length = record_length - header_length;
  70
  71                 if (line == null)
  72                         return;
  73                 try {
  74                         String[] tokens = line.split("\\s+");
  75
  76                         if (tokens[0].length() == 1) {
  77                                 if (tokens.length == 2 + data_length) {
  78                                         cmd = tokens[0].codePointAt(0);
  79                                         tick = Integer.parseInt(tokens[1],16);
  80                                         valid = true;
  81                                         data8 = new int[data_length];
  82                                         for (int i = 0; i < data_length; i++)
  83                                                 data8[i] = Integer.parseInt(tokens[2 + i],16);
  84                                 }
  85                         }
  86                 } catch (NumberFormatException ne) {
  87                 }
  88         }
  89 }