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_2;
  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 int data8(int i) {
  31                 return data8[i];
  32         }
  33
  34         public int data16(int i) {
  35                 return ((data8[i] | (data8[i+1] << 8)) << 16) >> 16;
  36         }
  37
  38         public int data24(int i) {
  39                 return data8[i] | (data8[i+1] << 8) | (data8[i+2] << 16);
  40         }
  41
  42         public int data32(int i) {
  43                 return data8[i] | (data8[i+1] << 8) | (data8[i+2] << 16) | (data8[i+3] << 24);
  44         }
  45
  46         public final static int header_length = 4;
  47
  48         public abstract int record_length();
  49
  50         public void update_state(AltosState state) {
  51                 if (cmd == AltosLib.AO_LOG_FLIGHT)
  52                         state.set_boost_tick(tick);
  53                 else
  54                         state.set_tick(tick);
  55         }
  56
  57         public void write(PrintStream out) {
  58                 out.printf("%c %04x", cmd, tick);
  59                 if (data8 != null) {
  60                         for (int i = 0; i < data8.length; i++)
  61                                 out.printf (" %02x", data8[i]);
  62                 }
  63                 out.printf ("\n");
  64         }
  65
  66         public String string() {
  67                 String  s;
  68
  69                 s = String.format("%c %04x", cmd, tick);
  70                 if (data8 != null) {
  71                         for (int i = 0; i < data8.length; i++) {
  72                                 String  d = String.format(" %02x", data8[i]);
  73                                 s = s.concat(d);
  74                         }
  75                 }
  76                 s = s.concat("\n");
  77                 return s;
  78         }
  79
  80         void parse_chunk(AltosEepromChunk chunk, int start) throws ParseException {
  81                 cmd = chunk.data(start);
  82
  83                 int data_length = record_length() - header_length;
  84
  85                 valid = !chunk.erased(start, record_length());
  86                 if (valid) {
  87                         if (AltosConvert.checksum(chunk.data, start, record_length()) != 0)
  88                                 throw new ParseException(String.format("invalid checksum at 0x%x",
  89                                                                        chunk.address + start), 0);
  90                 } else {
  91                         cmd = AltosLib.AO_LOG_INVALID;
  92                 }
  93
  94                 tick = chunk.data16(start+2);
  95
  96                 data8 = new int[data_length];
  97                 for (int i = 0; i < data_length; i++)
  98                         data8[i] = chunk.data(start + header_length + i);
  99         }
 100
 101         void parse_string(String line) {
 102                 valid = false;
 103                 tick = 0;
 104                 cmd = AltosLib.AO_LOG_INVALID;
 105
 106                 int data_length = record_length() - header_length;
 107
 108                 if (line == null)
 109                         return;
 110                 try {
 111                         String[] tokens = line.split("\\s+");
 112
 113                         if (tokens[0].length() == 1) {
 114                                 if (tokens.length == 2 + data_length) {
 115                                         cmd = tokens[0].codePointAt(0);
 116                                         tick = Integer.parseInt(tokens[1],16);
 117                                         valid = true;
 118                                         data8 = new int[data_length];
 119
 120                                         for (int i = 0; i < data_length; i++)
 121                                                 data8[i] = Integer.parseInt(tokens[2 + i],16);
 122                                 }
 123                         }
 124                 } catch (NumberFormatException ne) {
 125                 }
 126         }
 127 }