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

   1 /*
   2  * Copyright © 2017 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
  15 package org.altusmetrum.altoslib_12;
  16
  17 import java.util.*;
  18 import java.io.*;
  19
  20 public class AltosEeprom {
  21
  22         private AltosJson       config;
  23         ArrayList<Byte>         data;
  24         private AltosConfigData config_data;
  25
  26         /*
  27          * Public accessor APIs
  28          */
  29         public int data8(int offset) {
  30                 return ((int) data.get(offset)) & 0xff;
  31         }
  32
  33         public int data16(int offset) {
  34                 return data8(offset) | (data8(offset+1) << 8);
  35         }
  36
  37         public int data24(int offset) {
  38                 return (data8(offset) |
  39                         (data8(offset+1) << 8) |
  40                         (data8(offset+2) << 16));
  41         }
  42
  43         public int data32(int offset) {
  44                 return (data8(offset) |
  45                         (data8(offset+1) << 8) |
  46                         (data8(offset+2) << 16) |
  47                         (data8(offset+3) << 24));
  48         }
  49
  50         public int size() {
  51                 return data.size();
  52         }
  53
  54         public AltosConfigData config_data() {
  55                 if (config_data == null) {
  56                         config_data = (AltosConfigData) config.make(AltosConfigData.class);
  57                         if (config_data == null)
  58                                 config_data = new AltosConfigData();
  59
  60                         if (config_data.log_format == AltosLib.AO_LOG_FORMAT_UNKNOWN) {
  61                                 config_data.log_format = AltosLib.AO_LOG_FORMAT_FULL;
  62                                 if (config_data.product != null) {
  63                                         if (config_data.product.startsWith("TeleMetrum"))
  64                                                 config_data.log_format = AltosLib.AO_LOG_FORMAT_FULL;
  65                                         else if (config_data.product.startsWith("TeleMini"))
  66                                                 config_data.log_format = AltosLib.AO_LOG_FORMAT_TINY;
  67                                 }
  68                         }
  69                 }
  70                 return config_data;
  71         }
  72
  73         private void write_config(Writer w) throws IOException {
  74                 config.write(w, 0, true);
  75                 w.append('\n');
  76         }
  77
  78         /*
  79          * Private I/O APIs
  80          */
  81         private void write_data(Writer w) throws IOException {
  82                 PrintWriter pw = new PrintWriter(w);
  83
  84                 for (int i = 0; i < data.size(); i++) {
  85                         if (i > 0) {
  86                                 if ((i & 0x1f) == 0)
  87                                         pw.printf("\n");
  88                                 else
  89                                         pw.printf(" ");
  90                         }
  91                         pw.printf("%02x", data.get(i));
  92                 }
  93                 w.append('\n');
  94         }
  95
  96         private boolean read_config(InputStream stream) throws IOException {
  97                 config = AltosJson.fromInputStream(stream);
  98                 if (config == null)
  99                         return false;
 100                 return true;
 101         }
 102
 103         private String read_line(InputStream stream) throws IOException {
 104                 StringBuffer    buffer = null;
 105                 int             c;
 106
 107                 for (;;) {
 108                         c = stream.read();
 109                         if (c == -1 && buffer == null)
 110                                 return null;
 111                         if (buffer == null)
 112                                 buffer = new StringBuffer();
 113                         if (c == -1 || c == '\n')
 114                                 return buffer.toString();
 115                         buffer.append((char) c);
 116                 }
 117         }
 118
 119         private boolean read_data(InputStream stream) throws IOException {
 120                 String                  s;
 121
 122                 data = new ArrayList<Byte>();
 123                 while ((s = read_line(stream)) != null) {
 124
 125                         String[] tokens = s.split("\\s+");
 126
 127                         for (int i = 0; i < tokens.length; i++) {
 128                                 if (tokens[i].length() > 0) {
 129                                         try {
 130                                                 data.add((byte) AltosLib.fromhex(tokens[i]));
 131                                         } catch (NumberFormatException e) {
 132                                                 throw new IOException(e.toString());
 133                                         }
 134                                 }
 135                         }
 136                 }
 137                 return true;
 138         }
 139
 140         private boolean read_old_config(InputStream stream) throws IOException {
 141                 AltosConfigData cfg = new AltosConfigData();
 142                 for (;;) {
 143                         boolean done = false;
 144
 145                         /* The data starts with an upper case F character followed by a space */
 146                         stream.mark(2);
 147                         int     first = stream.read();
 148                         if (first == 'F') {
 149                                 int second =  stream.read();
 150                                 if (second == ' ')
 151                                         done = true;
 152                         }
 153                         stream.reset();
 154                         if (done)
 155                                 break;
 156
 157                         String line = read_line(stream);
 158                         if (line == null)
 159                                 return false;
 160                         cfg.parse_line(line);
 161                 }
 162                 config = new AltosJson(cfg);
 163                 return true;
 164         }
 165
 166         private boolean read_old_data(InputStream stream) throws IOException {
 167                 String line;
 168
 169                 data = new ArrayList<Byte>();
 170                 while ((line = read_line(stream)) != null) {
 171                         String[] tokens = line.split("\\s+");
 172
 173                         /* Make sure there's at least a type and time */
 174                         if (tokens.length < 2)
 175                                 break;
 176
 177                         /* packet type */
 178                         if (tokens[0].length() != 1)
 179                                 break;
 180                         int start = data.size();
 181
 182                         if (config_data().log_format != AltosLib.AO_LOG_FORMAT_TINY) {
 183                                 byte cmd = (byte) tokens[0].codePointAt(0);
 184                                 data.add(cmd);
 185
 186                                 int time = AltosLib.fromhex(tokens[1]);
 187
 188                                 data.add((byte) 0);
 189                                 data.add((byte) (time & 0xff));
 190                                 data.add((byte) (time >> 8));
 191                         }
 192                         if (tokens.length == 4) {
 193                                 /* Handle ancient log files */
 194                                 if (config_data().log_format == AltosLib.AO_LOG_FORMAT_TINY) {
 195                                         /*
 196                                          * Ancient TeleMini log files stored "extra" data to pretend
 197                                          * that it was a TeleMetrum device. Throw that away and
 198                                          * just save the actual log data.
 199                                          */
 200                                         int a = AltosLib.fromhex(tokens[2]);
 201                                         int b = AltosLib.fromhex(tokens[3]);
 202                                         if (a != 0)
 203                                                 b = 0x8000 | a;
 204                                         data.add((byte) (b & 0xff));
 205                                         data.add((byte) ((b >> 8)));
 206                                 } else {
 207                                         for (int i = 2; i < tokens.length; i++) {
 208                                                 int v = AltosLib.fromhex(tokens[i]);
 209                                                 data.add((byte) (v & 0xff));
 210                                                 data.add((byte) ((v >> 8)));
 211                                         }
 212                                         /* Re-compute the checksum byte */
 213                                         data.set(start + 1, (byte) (256 - AltosConvert.checksum(data, start, data.size() - start)));
 214                                 }
 215                         } else {
 216                                 for (int i = 2; i < tokens.length; i++)
 217                                         data.add((byte) AltosLib.fromhex(tokens[i]));
 218                                 /* Re-compute the checksum byte */
 219                                 data.set(start + 1, (byte) (256 - AltosConvert.checksum(data, start, data.size() - start)));
 220                         }
 221                 }
 222                 return true;
 223         }
 224
 225         private void read(InputStream stream) throws IOException {
 226                 BufferedInputStream     bis = new BufferedInputStream(stream);
 227
 228                 bis.mark(1);
 229                 int c = bis.read();
 230                 bis.reset();
 231
 232                 if (c == '{') {
 233                         if (!read_config(bis))
 234                                 throw new IOException("failed to read config");
 235                         if (!read_data(bis))
 236                                 throw new IOException("failed to read data");
 237                 } else {
 238                         if (!read_old_config(bis))
 239                                 throw new IOException("failed to read old config");
 240                         if (!read_old_data(bis))
 241                                 throw new IOException("failed to read old data");
 242                 }
 243         }
 244
 245         /*
 246          * Public APIs for I/O
 247          */
 248         public void write(Writer w) throws IOException {
 249                 write_config(w);
 250                 write_data(w);
 251         }
 252
 253         public String toString() {
 254                 try {
 255                         Writer  w = new StringWriter();
 256
 257                         write(w);
 258                         return w.toString();
 259                 } catch (Exception e) {
 260                         return null;
 261                 }
 262         }
 263
 264         public void print() throws IOException {
 265                 System.out.printf("%s", toString());
 266         }
 267
 268         /*
 269          * Constructors
 270          */
 271         public AltosEeprom(InputStream stream) throws IOException {
 272                 read(stream);
 273         }
 274
 275         public AltosEeprom(String s) throws IOException {
 276                 read(new AltosStringInputStream(s));
 277         }
 278
 279         public AltosEeprom(AltosJson config, ArrayList<Byte> data) {
 280                 this.config = config;
 281                 this.data = data;
 282         }
 283
 284         public AltosEeprom(AltosConfigData config_data, ArrayList<Byte> data) {
 285                 this.config = new AltosJson(config_data);
 286                 this.data = data;
 287         }
 288
 289         public AltosEeprom() {
 290         }
 291 }