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_14;
  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         int                     errors = 0;
  26
  27         /*
  28          * Public accessor APIs
  29          */
  30         public int data8(int offset) {
  31                 return ((int) data.get(offset)) & 0xff;
  32         }
  33
  34         public int data16(int offset) {
  35                 return data8(offset) | (data8(offset+1) << 8);
  36         }
  37
  38         public int data24(int offset) {
  39                 return (data8(offset) |
  40                         (data8(offset+1) << 8) |
  41                         (data8(offset+2) << 16));
  42         }
  43
  44         public int data32(int offset) {
  45                 return (data8(offset) |
  46                         (data8(offset+1) << 8) |
  47                         (data8(offset+2) << 16) |
  48                         (data8(offset+3) << 24));
  49         }
  50
  51         public int size() {
  52                 return data.size();
  53         }
  54
  55         public AltosConfigData config_data() {
  56                 if (config_data == null) {
  57                         config_data = (AltosConfigData) config.make(AltosConfigData.class);
  58                         if (config_data == null)
  59                                 config_data = new AltosConfigData();
  60
  61                         if (config_data.log_format == AltosLib.AO_LOG_FORMAT_UNKNOWN) {
  62                                 config_data.log_format = AltosLib.AO_LOG_FORMAT_FULL;
  63                                 if (config_data.product != null) {
  64                                         if (config_data.product.startsWith("TeleMetrum"))
  65                                                 config_data.log_format = AltosLib.AO_LOG_FORMAT_FULL;
  66                                         else if (config_data.product.startsWith("TeleMini"))
  67                                                 config_data.log_format = AltosLib.AO_LOG_FORMAT_TINY;
  68                                 }
  69                         }
  70                 }
  71                 return config_data;
  72         }
  73
  74         private void write_config(Writer w) throws IOException {
  75                 config.write(w, 0, true);
  76                 w.append('\n');
  77         }
  78
  79         /*
  80          * Private I/O APIs
  81          */
  82         private void write_data(Writer w) throws IOException {
  83                 PrintWriter pw = new PrintWriter(w);
  84
  85                 for (int i = 0; i < data.size(); i++) {
  86                         if (i > 0) {
  87                                 if ((i & 0x1f) == 0)
  88                                         pw.printf("\n");
  89                                 else
  90                                         pw.printf(" ");
  91                         }
  92                         pw.printf("%02x", data.get(i));
  93                 }
  94                 w.append('\n');
  95         }
  96
  97         private boolean read_config(InputStream stream) throws IOException {
  98                 config = AltosJson.fromInputStream(stream);
  99                 if (config == null)
 100                         return false;
 101                 return true;
 102         }
 103
 104         private String read_line(InputStream stream) throws IOException {
 105                 StringBuffer    buffer = null;
 106                 int             c;
 107
 108                 for (;;) {
 109                         c = stream.read();
 110                         if (c == -1 && buffer == null)
 111                                 return null;
 112                         if (buffer == null)
 113                                 buffer = new StringBuffer();
 114                         if (c == -1 || c == '\n')
 115                                 return buffer.toString();
 116                         buffer.append((char) c);
 117                 }
 118         }
 119
 120         private boolean read_data(InputStream stream) throws IOException {
 121                 String                  s;
 122
 123                 data = new ArrayList<Byte>();
 124                 while ((s = read_line(stream)) != null) {
 125
 126                         String[] tokens = s.split("\\s+");
 127
 128                         for (int i = 0; i < tokens.length; i++) {
 129                                 if (tokens[i].length() > 0) {
 130                                         try {
 131                                                 data.add((byte) AltosLib.fromhex(tokens[i]));
 132                                         } catch (NumberFormatException e) {
 133                                                 throw new IOException(e.toString());
 134                                         }
 135                                 }
 136                         }
 137                 }
 138                 return true;
 139         }
 140
 141         private boolean read_old_config(InputStream stream) throws IOException {
 142                 AltosConfigData cfg = new AltosConfigData();
 143                 for (;;) {
 144                         boolean done = false;
 145
 146                         /* The data starts with an upper case F character followed by a space */
 147                         stream.mark(2);
 148                         int     first = stream.read();
 149                         if (first == 'F') {
 150                                 int second =  stream.read();
 151                                 if (second == ' ')
 152                                         done = true;
 153                         }
 154                         stream.reset();
 155                         if (done)
 156                                 break;
 157
 158                         String line = read_line(stream);
 159                         if (line == null)
 160                                 return false;
 161                         cfg.parse_line(line);
 162                 }
 163                 config = new AltosJson(cfg);
 164                 return true;
 165         }
 166
 167         private boolean read_old_data(InputStream stream) throws IOException {
 168                 String line;
 169
 170                 data = new ArrayList<Byte>();
 171                 while ((line = read_line(stream)) != null) {
 172                         String[] tokens = line.split("\\s+");
 173
 174                         /* Make sure there's at least a type and time */
 175                         if (tokens.length < 2)
 176                                 break;
 177
 178                         /* packet type */
 179                         if (tokens[0].length() != 1)
 180                                 break;
 181                         int start = data.size();
 182
 183                         if (config_data().log_format != AltosLib.AO_LOG_FORMAT_TINY) {
 184                                 byte cmd = (byte) tokens[0].codePointAt(0);
 185                                 data.add(cmd);
 186
 187                                 int time = AltosLib.fromhex(tokens[1]);
 188
 189                                 data.add((byte) 0);
 190                                 data.add((byte) (time & 0xff));
 191                                 data.add((byte) (time >> 8));
 192                         }
 193                         if (tokens.length == 4) {
 194                                 /* Handle ancient log files */
 195                                 if (config_data().log_format == AltosLib.AO_LOG_FORMAT_TINY) {
 196                                         /*
 197                                          * Ancient TeleMini log files stored "extra" data to pretend
 198                                          * that it was a TeleMetrum device. Throw that away and
 199                                          * just save the actual log data.
 200                                          */
 201                                         int a = AltosLib.fromhex(tokens[2]);
 202                                         int b = AltosLib.fromhex(tokens[3]);
 203                                         if (a != 0)
 204                                                 b = 0x8000 | a;
 205                                         data.add((byte) (b & 0xff));
 206                                         data.add((byte) ((b >> 8)));
 207                                 } else {
 208                                         for (int i = 2; i < tokens.length; i++) {
 209                                                 int v = AltosLib.fromhex(tokens[i]);
 210                                                 data.add((byte) (v & 0xff));
 211                                                 data.add((byte) ((v >> 8)));
 212                                         }
 213                                         /* Re-compute the checksum byte */
 214                                         data.set(start + 1, (byte) (256 - AltosConvert.checksum(data, start, data.size() - start)));
 215                                 }
 216                         } else {
 217                                 for (int i = 2; i < tokens.length; i++)
 218                                         data.add((byte) AltosLib.fromhex(tokens[i]));
 219                                 /* Re-compute the checksum byte */
 220                                 data.set(start + 1, (byte) (256 - AltosConvert.checksum(data, start, data.size() - start)));
 221                         }
 222                 }
 223                 return true;
 224         }
 225
 226         private void read(InputStream stream) throws IOException {
 227                 BufferedInputStream     bis = new BufferedInputStream(stream);
 228
 229                 bis.mark(1);
 230                 int c = bis.read();
 231                 bis.reset();
 232
 233                 if (c == '{') {
 234                         if (!read_config(bis))
 235                                 throw new IOException("failed to read config");
 236                         if (!read_data(bis))
 237                                 throw new IOException("failed to read data");
 238                 } else {
 239                         if (!read_old_config(bis))
 240                                 throw new IOException("failed to read old config");
 241                         if (!read_old_data(bis))
 242                                 throw new IOException("failed to read old data");
 243                 }
 244         }
 245
 246         /*
 247          * Public APIs for I/O
 248          */
 249         public void write(Writer w) throws IOException {
 250                 write_config(w);
 251                 write_data(w);
 252         }
 253
 254         public String toString() {
 255                 try {
 256                         Writer  w = new StringWriter();
 257
 258                         write(w);
 259                         return w.toString();
 260                 } catch (Exception e) {
 261                         return null;
 262                 }
 263         }
 264
 265         public void print() throws IOException {
 266                 System.out.printf("%s", toString());
 267         }
 268
 269         /*
 270          * Constructors
 271          */
 272         public AltosEeprom(InputStream stream) throws IOException {
 273                 read(stream);
 274         }
 275
 276         public AltosEeprom(String s) throws IOException {
 277                 read(new AltosStringInputStream(s));
 278         }
 279
 280         public AltosEeprom(AltosJson config, ArrayList<Byte> data) {
 281                 this.config = config;
 282                 this.data = data;
 283         }
 284
 285         public AltosEeprom(AltosConfigData config_data, ArrayList<Byte> data) {
 286                 this.config = new AltosJson(config_data);
 287                 this.data = data;
 288         }
 289
 290         public AltosEeprom() {
 291         }
 292 }