git.gag.com Git - fw/altos/blob - src/ao_gps_test.c

   1 /*
   2  * Copyright © 2009 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 #define AO_GPS_TEST
  19 #include "ao_host.h"
  20 #include <termios.h>
  21 #include <errno.h>
  22 #include <sys/types.h>
  23 #include <sys/stat.h>
  24 #include <fcntl.h>
  25 #define AO_GPS_NUM_SAT_MASK     (0xf << 0)
  26 #define AO_GPS_NUM_SAT_SHIFT    (0)
  27
  28 #define AO_GPS_VALID            (1 << 4)
  29 #define AO_GPS_RUNNING          (1 << 5)
  30 #define AO_GPS_DATE_VALID       (1 << 6)
  31 #define AO_GPS_COURSE_VALID     (1 << 7)
  32
  33 struct ao_gps_orig {
  34         uint8_t                 year;
  35         uint8_t                 month;
  36         uint8_t                 day;
  37         uint8_t                 hour;
  38         uint8_t                 minute;
  39         uint8_t                 second;
  40         uint8_t                 flags;
  41         int32_t                 latitude;       /* degrees * 10⁷ */
  42         int32_t                 longitude;      /* degrees * 10⁷ */
  43         int16_t                 altitude;       /* m */
  44         uint16_t                ground_speed;   /* cm/s */
  45         uint8_t                 course;         /* degrees / 2 */
  46         uint8_t                 hdop;           /* * 5 */
  47         int16_t                 climb_rate;     /* cm/s */
  48         uint16_t                h_error;        /* m */
  49         uint16_t                v_error;        /* m */
  50 };
  51
  52 #define SIRF_SAT_STATE_ACQUIRED                 (1 << 0)
  53 #define SIRF_SAT_STATE_CARRIER_PHASE_VALID      (1 << 1)
  54 #define SIRF_SAT_BIT_SYNC_COMPLETE              (1 << 2)
  55 #define SIRF_SAT_SUBFRAME_SYNC_COMPLETE         (1 << 3)
  56 #define SIRF_SAT_CARRIER_PULLIN_COMPLETE        (1 << 4)
  57 #define SIRF_SAT_CODE_LOCKED                    (1 << 5)
  58 #define SIRF_SAT_ACQUISITION_FAILED             (1 << 6)
  59 #define SIRF_SAT_EPHEMERIS_AVAILABLE            (1 << 7)
  60
  61 struct ao_gps_sat_orig {
  62         uint8_t         svid;
  63         uint8_t         c_n_1;
  64 };
  65
  66 #define AO_MAX_GPS_TRACKING     12
  67
  68 struct ao_gps_tracking_orig {
  69         uint8_t                 channels;
  70         struct ao_gps_sat_orig  sats[AO_MAX_GPS_TRACKING];
  71 };
  72
  73 #define ao_telemetry_location ao_gps_orig
  74 #define ao_telemetry_satellite ao_gps_tracking_orig
  75 #define ao_telemetry_satellite_info ao_gps_sat_orig
  76
  77 void
  78 ao_mutex_get(uint8_t *mutex)
  79 {
  80 }
  81
  82 void
  83 ao_mutex_put(uint8_t *mutex)
  84 {
  85 }
  86
  87 static int
  88 ao_gps_fd;
  89
  90 static void
  91 ao_dbg_char(char c)
  92 {
  93         char    line[128];
  94         line[0] = '\0';
  95         if (c < ' ') {
  96                 if (c == '\n')
  97                         sprintf (line, "\n");
  98                 else
  99                         sprintf (line, "\\%02x", ((int) c) & 0xff);
 100         } else {
 101                 sprintf (line, "%c", c);
 102         }
 103         write(1, line, strlen(line));
 104 }
 105
 106 #define QUEUE_LEN       4096
 107
 108 static char     input_queue[QUEUE_LEN];
 109 int             input_head, input_tail;
 110
 111 #include <sys/time.h>
 112
 113 int
 114 get_millis(void)
 115 {
 116         struct timeval  tv;
 117         gettimeofday(&tv, NULL);
 118         return tv.tv_sec * 1000 + tv.tv_usec / 1000;
 119 }
 120
 121 static void
 122 check_sirf_message(char *from, uint8_t *msg, int len)
 123 {
 124         uint16_t        encoded_len, encoded_cksum;
 125         uint16_t        cksum;
 126         uint8_t         id;
 127         int             i;
 128
 129         if (msg[0] != 0xa0 || msg[1] != 0xa2) {
 130                 printf ("bad header\n");
 131                 return;
 132         }
 133         if (len < 7) {
 134                 printf("short\n");
 135                 return;
 136         }
 137         if (msg[len-1] != 0xb3 || msg[len-2] != 0xb0) {
 138                 printf ("bad trailer\n");
 139                 return;
 140         }
 141         encoded_len = (msg[2] << 8) | msg[3];
 142         id = msg[4];
 143 /*      printf ("%9d: %3d\n", get_millis(), id); */
 144         if (encoded_len != len - 8) {
 145                 if (id != 52)
 146                         printf ("length mismatch (got %d, wanted %d)\n",
 147                                 len - 8, encoded_len);
 148                 return;
 149         }
 150         encoded_cksum = (msg[len - 4] << 8) | msg[len-3];
 151         cksum = 0;
 152         for (i = 4; i < len - 4; i++)
 153                 cksum = (cksum + msg[i]) & 0x7fff;
 154         if (encoded_cksum != cksum) {
 155                 printf ("cksum mismatch (got %04x wanted %04x)\n",
 156                         cksum, encoded_cksum);
 157                 return;
 158         }
 159         id = msg[4];
 160         switch (id) {
 161         case 41:{
 162                 int     off = 4;
 163
 164                 uint8_t         id;
 165                 uint16_t        nav_valid;
 166                 uint16_t        nav_type;
 167                 uint16_t        week;
 168                 uint32_t        tow;
 169                 uint16_t        year;
 170                 uint8_t         month;
 171                 uint8_t         day;
 172                 uint8_t         hour;
 173                 uint8_t         minute;
 174                 uint16_t        second;
 175                 uint32_t        sat_list;
 176                 int32_t         lat;
 177                 int32_t         lon;
 178                 int32_t         alt_ell;
 179                 int32_t         alt_msl;
 180                 int8_t          datum;
 181                 uint16_t        sog;
 182                 uint16_t        cog;
 183                 int16_t         mag_var;
 184                 int16_t         climb_rate;
 185                 int16_t         heading_rate;
 186                 uint32_t        h_error;
 187                 uint32_t        v_error;
 188                 uint32_t        t_error;
 189                 uint16_t        h_v_error;
 190
 191 #define get_u8(u)       u = (msg[off]); off+= 1
 192 #define get_u16(u)      u = (msg[off] << 8) | (msg[off + 1]); off+= 2
 193 #define get_u32(u)      u = (msg[off] << 24) | (msg[off + 1] << 16) | (msg[off+2] << 8) | (msg[off+3]); off+= 4
 194
 195                 get_u8(id);
 196                 get_u16(nav_valid);
 197                 get_u16(nav_type);
 198                 get_u16(week);
 199                 get_u32(tow);
 200                 get_u16(year);
 201                 get_u8(month);
 202                 get_u8(day);
 203                 get_u8(hour);
 204                 get_u8(minute);
 205                 get_u16(second);
 206                 get_u32(sat_list);
 207                 get_u32(lat);
 208                 get_u32(lon);
 209                 get_u32(alt_ell);
 210                 get_u32(alt_msl);
 211                 get_u8(datum);
 212                 get_u16(sog);
 213                 get_u16(cog);
 214                 get_u16(mag_var);
 215                 get_u16(climb_rate);
 216                 get_u16(heading_rate);
 217                 get_u32(h_error);
 218                 get_u32(v_error);
 219                 get_u32(t_error);
 220                 get_u16(h_v_error);
 221
 222
 223                 printf ("Geodetic Navigation Data (41):\n");
 224                 printf ("\tNav valid %04x\n", nav_valid);
 225                 printf ("\tNav type %04x\n", nav_type);
 226                 printf ("\tWeek %5d", week);
 227                 printf (" TOW %9d", tow);
 228                 printf (" %4d-%2d-%2d %02d:%02d:%07.4f\n",
 229                         year, month, day,
 230                         hour, minute, second / 1000.0);
 231                 printf ("\tsats: %08x\n", sat_list);
 232                 printf ("\tlat: %g", lat / 1.0e7);
 233                 printf (" lon: %g", lon / 1.0e7);
 234                 printf (" alt_ell: %g", alt_ell / 100.0);
 235                 printf (" alt_msll: %g", alt_msl / 100.0);
 236                 printf (" datum: %d\n", datum);
 237                 printf ("\tground speed: %g", sog / 100.0);
 238                 printf (" course: %g", cog / 100.0);
 239                 printf (" climb: %g", climb_rate / 100.0);
 240                 printf (" heading rate: %g\n", heading_rate / 100.0);
 241                 printf ("\th error: %g", h_error / 100.0);
 242                 printf (" v error: %g", v_error / 100.0);
 243                 printf (" t error: %g", t_error / 100.0);
 244                 printf (" h vel error: %g\n", h_v_error / 100.0);
 245                 break;
 246         }
 247         case 4: {
 248                 int off = 4;
 249                 uint8_t         id;
 250                 int16_t         gps_week;
 251                 uint32_t        gps_tow;
 252                 uint8_t         channels;
 253                 int             j, k;
 254
 255                 get_u8(id);
 256                 get_u16(gps_week);
 257                 get_u32(gps_tow);
 258                 get_u8(channels);
 259
 260                 printf ("Measured Tracker Data (4):\n");
 261                 printf ("GPS week: %d\n", gps_week);
 262                 printf ("GPS time of week: %d\n", gps_tow);
 263                 printf ("channels: %d\n", channels);
 264                 for (j = 0; j < 12; j++) {
 265                         uint8_t svid, azimuth, elevation;
 266                         uint16_t state;
 267                         uint8_t c_n[10];
 268                         get_u8(svid);
 269                         get_u8(azimuth);
 270                         get_u8(elevation);
 271                         get_u16(state);
 272                         for (k = 0; k < 10; k++) {
 273                                 get_u8(c_n[k]);
 274                         }
 275                         printf ("Sat %3d:", svid);
 276                         printf (" aziumuth: %6.1f", azimuth * 1.5);
 277                         printf (" elevation: %6.1f", elevation * 0.5);
 278                         printf (" state: 0x%02x", state);
 279                         printf (" c_n:");
 280                         for (k = 0; k < 10; k++)
 281                                 printf(" %3d", c_n[k]);
 282                         if (state & SIRF_SAT_STATE_ACQUIRED)
 283                                 printf(" acq,");
 284                         if (state & SIRF_SAT_STATE_CARRIER_PHASE_VALID)
 285                                 printf(" car,");
 286                         if (state & SIRF_SAT_BIT_SYNC_COMPLETE)
 287                                 printf(" bit,");
 288                         if (state & SIRF_SAT_SUBFRAME_SYNC_COMPLETE)
 289                                 printf(" sub,");
 290                         if (state & SIRF_SAT_CARRIER_PULLIN_COMPLETE)
 291                                 printf(" pullin,");
 292                         if (state & SIRF_SAT_CODE_LOCKED)
 293                                 printf(" code,");
 294                         if (state & SIRF_SAT_ACQUISITION_FAILED)
 295                                 printf(" fail,");
 296                         if (state & SIRF_SAT_EPHEMERIS_AVAILABLE)
 297                                 printf(" ephem,");
 298                         printf ("\n");
 299                 }
 300                 break;
 301         }
 302         default:
 303                 return;
 304                 printf ("%s %4d:", from, encoded_len);
 305                 for (i = 4; i < len - 4; i++) {
 306                         if (((i - 4) & 0xf) == 0)
 307                                 printf("\n   ");
 308                         printf (" %3d", msg[i]);
 309                 }
 310                 printf ("\n");
 311         }
 312 }
 313
 314 static uint8_t  sirf_message[4096];
 315 static int      sirf_message_len;
 316 static uint8_t  sirf_in_message[4096];
 317 static int      sirf_in_len;
 318
 319 char
 320 ao_serial_getchar(void)
 321 {
 322         char    c;
 323         uint8_t uc;
 324
 325         while (input_head == input_tail) {
 326                 for (;;) {
 327                         input_tail = read(ao_gps_fd, input_queue, QUEUE_LEN);
 328                         if (input_tail < 0) {
 329                                 if (errno == EINTR || errno == EAGAIN)
 330                                         continue;
 331                                 perror ("getchar");
 332                                 exit (1);
 333                         }
 334                         input_head = 0;
 335                         break;
 336                 }
 337         }
 338         c = input_queue[input_head];
 339         input_head = (input_head + 1) % QUEUE_LEN;
 340         uc = c;
 341         if (sirf_in_len || uc == 0xa0) {
 342                 if (sirf_in_len < 4096)
 343                         sirf_in_message[sirf_in_len++] = uc;
 344                 if (uc == 0xb3) {
 345                         check_sirf_message("recv", sirf_in_message, sirf_in_len);
 346                         sirf_in_len = 0;
 347                 }
 348         }
 349         return c;
 350 }
 351
 352
 353 void
 354 ao_serial_putchar(char c)
 355 {
 356         int     i;
 357         uint8_t uc = (uint8_t) c;
 358
 359         if (sirf_message_len || uc == 0xa0) {
 360                 if (sirf_message_len < 4096)
 361                         sirf_message[sirf_message_len++] = uc;
 362                 if (uc == 0xb3) {
 363                         check_sirf_message("send", sirf_message, sirf_message_len);
 364                         sirf_message_len = 0;
 365                 }
 366         }
 367         for (;;) {
 368                 i = write(ao_gps_fd, &c, 1);
 369                 if (i == 1) {
 370                         if ((uint8_t) c == 0xb3 || c == '\r') {
 371                                 static const struct timespec delay = {
 372                                         .tv_sec = 0,
 373                                         .tv_nsec = 100 * 1000 * 1000
 374                                 };
 375                                 tcdrain(ao_gps_fd);
 376 //                              nanosleep(&delay, NULL);
 377                         }
 378                         break;
 379                 }
 380                 if (i < 0 && (errno == EINTR || errno == EAGAIN))
 381                         continue;
 382                 perror("putchar");
 383                 exit(1);
 384         }
 385 }
 386
 387 #define AO_SERIAL_SPEED_4800    0
 388 #define AO_SERIAL_SPEED_57600   1
 389
 390 static void
 391 ao_serial_set_speed(uint8_t speed)
 392 {
 393         int     fd = ao_gps_fd;
 394         struct termios  termios;
 395
 396         tcdrain(fd);
 397         tcgetattr(fd, &termios);
 398         switch (speed) {
 399         case AO_SERIAL_SPEED_4800:
 400                 cfsetspeed(&termios, B4800);
 401                 break;
 402         case AO_SERIAL_SPEED_57600:
 403                 cfsetspeed(&termios, B57600);
 404                 break;
 405         }
 406         tcsetattr(fd, TCSAFLUSH, &termios);
 407         tcflush(fd, TCIFLUSH);
 408 }
 409
 410 #define ao_time() 0
 411
 412 #include "ao_gps_print.c"
 413 #include "ao_gps_sirf.c"
 414
 415 void
 416 ao_dump_state(void *wchan)
 417 {
 418         double  lat, lon;
 419         int     i;
 420         if (wchan == &ao_gps_data)
 421                 ao_gps_print(&ao_gps_data);
 422         else
 423                 ao_gps_tracking_print(&ao_gps_tracking_data);
 424         putchar('\n');
 425         return;
 426         printf ("%02d:%02d:%02d",
 427                 ao_gps_data.hour, ao_gps_data.minute,
 428                 ao_gps_data.second);
 429         printf (" nsat %d %svalid",
 430                 ao_gps_data.flags & AO_GPS_NUM_SAT_MASK,
 431                 ao_gps_data.flags & AO_GPS_VALID ? "" : "not ");
 432         printf (" lat %g lon %g alt %d",
 433                 ao_gps_data.latitude / 1.0e7,
 434                 ao_gps_data.longitude / 1.0e7,
 435                 ao_gps_data.altitude);
 436         printf (" speed %g climb %g course %d",
 437                 ao_gps_data.ground_speed / 100.0,
 438                 ao_gps_data.climb_rate / 100.0,
 439                 ao_gps_data.course * 2);
 440         printf (" hdop %g h_error %d v_error %d",
 441                 ao_gps_data.hdop / 5.0,
 442                 ao_gps_data.h_error, ao_gps_data.v_error);
 443         printf("\n");
 444         printf ("\t");
 445         for (i = 0; i < 12; i++)
 446                 printf (" %2d(%02d)",
 447                         ao_gps_tracking_data.sats[i].svid,
 448                         ao_gps_tracking_data.sats[i].c_n_1);
 449         printf ("\n");
 450 }
 451
 452 int
 453 ao_gps_open(const char *tty)
 454 {
 455         struct termios  termios;
 456         int fd;
 457
 458         fd = open (tty, O_RDWR);
 459         if (fd < 0)
 460                 return -1;
 461
 462         tcgetattr(fd, &termios);
 463         cfmakeraw(&termios);
 464         cfsetspeed(&termios, B4800);
 465         tcsetattr(fd, TCSAFLUSH, &termios);
 466
 467         tcdrain(fd);
 468         tcflush(fd, TCIFLUSH);
 469         return fd;
 470 }
 471
 472 #include <getopt.h>
 473
 474 static const struct option options[] = {
 475         { .name = "tty", .has_arg = 1, .val = 'T' },
 476         { 0, 0, 0, 0},
 477 };
 478
 479 static void usage(char *program)
 480 {
 481         fprintf(stderr, "usage: %s [--tty <tty-name>]\n", program);
 482         exit(1);
 483 }
 484
 485 int
 486 main (int argc, char **argv)
 487 {
 488         char    *tty = "/dev/ttyUSB0";
 489         int     c;
 490
 491         while ((c = getopt_long(argc, argv, "T:", options, NULL)) != -1) {
 492                 switch (c) {
 493                 case 'T':
 494                         tty = optarg;
 495                         break;
 496                 default:
 497                         usage(argv[0]);
 498                         break;
 499                 }
 500         }
 501         ao_gps_fd = ao_gps_open(tty);
 502         if (ao_gps_fd < 0) {
 503                 perror (tty);
 504                 exit (1);
 505         }
 506         ao_gps_setup();
 507         ao_gps();
 508 }