2 * Copyright © 2009 Keith Packard <keithp@keithp.com>
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.
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.
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.
22 #include <sys/types.h>
25 #define AO_GPS_NUM_SAT_MASK (0xf << 0)
26 #define AO_GPS_NUM_SAT_SHIFT (0)
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)
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 */
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)
61 struct ao_gps_sat_orig {
66 #define AO_MAX_GPS_TRACKING 12
68 struct ao_gps_tracking_orig {
70 struct ao_gps_sat_orig sats[AO_MAX_GPS_TRACKING];
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
78 ao_mutex_get(uint8_t *mutex)
83 ao_mutex_put(uint8_t *mutex)
99 sprintf (line, "\\%02x", ((int) c) & 0xff);
101 sprintf (line, "%c", c);
103 write(1, line, strlen(line));
106 #define QUEUE_LEN 4096
108 static char input_queue[QUEUE_LEN];
109 int input_head, input_tail;
111 #include <sys/time.h>
117 gettimeofday(&tv, NULL);
118 return tv.tv_sec * 1000 + tv.tv_usec / 1000;
122 check_sirf_message(char *from, uint8_t *msg, int len)
124 uint16_t encoded_len, encoded_cksum;
129 if (msg[0] != 0xa0 || msg[1] != 0xa2) {
130 printf ("bad header\n");
137 if (msg[len-1] != 0xb3 || msg[len-2] != 0xb0) {
138 printf ("bad trailer\n");
141 encoded_len = (msg[2] << 8) | msg[3];
143 /* printf ("%9d: %3d\n", get_millis(), id); */
144 if (encoded_len != len - 8) {
146 printf ("length mismatch (got %d, wanted %d)\n",
147 len - 8, encoded_len);
150 encoded_cksum = (msg[len - 4] << 8) | msg[len-3];
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);
185 int16_t heading_rate;
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
216 get_u16(heading_rate);
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",
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);
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;
272 for (k = 0; k < 10; k++) {
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);
280 for (k = 0; k < 10; k++)
281 printf(" %3d", c_n[k]);
282 if (state & SIRF_SAT_STATE_ACQUIRED)
284 if (state & SIRF_SAT_STATE_CARRIER_PHASE_VALID)
286 if (state & SIRF_SAT_BIT_SYNC_COMPLETE)
288 if (state & SIRF_SAT_SUBFRAME_SYNC_COMPLETE)
290 if (state & SIRF_SAT_CARRIER_PULLIN_COMPLETE)
292 if (state & SIRF_SAT_CODE_LOCKED)
294 if (state & SIRF_SAT_ACQUISITION_FAILED)
296 if (state & SIRF_SAT_EPHEMERIS_AVAILABLE)
304 printf ("%s %4d:", from, encoded_len);
305 for (i = 4; i < len - 4; i++) {
306 if (((i - 4) & 0xf) == 0)
308 printf (" %3d", msg[i]);
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;
320 ao_serial_getchar(void)
325 while (input_head == input_tail) {
327 input_tail = read(ao_gps_fd, input_queue, QUEUE_LEN);
328 if (input_tail < 0) {
329 if (errno == EINTR || errno == EAGAIN)
338 c = input_queue[input_head];
339 input_head = (input_head + 1) % QUEUE_LEN;
341 if (sirf_in_len || uc == 0xa0) {
342 if (sirf_in_len < 4096)
343 sirf_in_message[sirf_in_len++] = uc;
345 check_sirf_message("recv", sirf_in_message, sirf_in_len);
354 ao_serial_putchar(char c)
357 uint8_t uc = (uint8_t) c;
359 if (sirf_message_len || uc == 0xa0) {
360 if (sirf_message_len < 4096)
361 sirf_message[sirf_message_len++] = uc;
363 check_sirf_message("send", sirf_message, sirf_message_len);
364 sirf_message_len = 0;
368 i = write(ao_gps_fd, &c, 1);
370 if ((uint8_t) c == 0xb3 || c == '\r') {
371 static const struct timespec delay = {
373 .tv_nsec = 100 * 1000 * 1000
376 // nanosleep(&delay, NULL);
380 if (i < 0 && (errno == EINTR || errno == EAGAIN))
387 #define AO_SERIAL_SPEED_4800 0
388 #define AO_SERIAL_SPEED_57600 1
391 ao_serial_set_speed(uint8_t speed)
394 struct termios termios;
397 tcgetattr(fd, &termios);
399 case AO_SERIAL_SPEED_4800:
400 cfsetspeed(&termios, B4800);
402 case AO_SERIAL_SPEED_57600:
403 cfsetspeed(&termios, B57600);
406 tcsetattr(fd, TCSAFLUSH, &termios);
407 tcflush(fd, TCIFLUSH);
412 #include "ao_gps_print.c"
413 #include "ao_gps_sirf.c"
416 ao_dump_state(void *wchan)
420 if (wchan == &ao_gps_data)
421 ao_gps_print(&ao_gps_data);
423 ao_gps_tracking_print(&ao_gps_tracking_data);
426 printf ("%02d:%02d:%02d",
427 ao_gps_data.hour, ao_gps_data.minute,
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);
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);
453 ao_gps_open(const char *tty)
455 struct termios termios;
458 fd = open (tty, O_RDWR);
462 tcgetattr(fd, &termios);
464 cfsetspeed(&termios, B4800);
465 tcsetattr(fd, TCSAFLUSH, &termios);
468 tcflush(fd, TCIFLUSH);
474 static const struct option options[] = {
475 { .name = "tty", .has_arg = 1, .val = 'T' },
479 static void usage(char *program)
481 fprintf(stderr, "usage: %s [--tty <tty-name>]\n", program);
486 main (int argc, char **argv)
488 char *tty = "/dev/ttyUSB0";
491 while ((c = getopt_long(argc, argv, "T:", options, NULL)) != -1) {
501 ao_gps_fd = ao_gps_open(tty);