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; either version 2 of the License, or
7 * (at your option) any later version.
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.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
19 #ifndef AO_FLIGHT_TEST
24 #include <ao_flight.h>
26 #if HAS_MPU6000 || HAS_MPU9250
27 #include <ao_quaternion.h>
31 #error Please define HAS_ACCEL
35 #error Please define HAS_GPS
39 #error Please define HAS_USB
43 #include <ao_fake_flight.h>
47 #define HAS_TELEMETRY HAS_RADIO
50 /* Main flight thread. */
52 enum ao_flight_state ao_flight_state; /* current flight state */
53 uint16_t ao_boost_tick; /* time of most recent boost detect */
54 uint16_t ao_launch_tick; /* time of first boost detect */
55 uint16_t ao_motor_number; /* number of motors burned so far */
58 /* Any sensor can set this to mark the flight computer as 'broken' */
59 uint8_t ao_sensor_errors;
63 * track min/max data over a long interval to detect
66 static uint16_t ao_interval_end;
68 static ao_v_t ao_interval_min_height;
69 static ao_v_t ao_interval_max_height;
71 static accel_t ao_interval_min_accel_along, ao_interval_max_accel_along;
72 static accel_t ao_interval_min_accel_across, ao_interval_max_accel_across;
73 static accel_t ao_interval_min_accel_through, ao_interval_max_accel_through;
76 static ao_v_t ao_coast_avg_accel;
79 #define init_bounds(_cur, _min, _max) do { \
83 #define check_bounds(_cur, _min, _max) do { \
90 uint8_t ao_flight_force_idle;
92 /* We also have a clock, which can be used to sanity check things in
93 * case of other failures
96 #define BOOST_TICKS_MAX AO_SEC_TO_TICKS(15)
98 /* Landing is detected by getting constant readings from both pressure and accelerometer
99 * for a fairly long time (AO_INTERVAL_TICKS)
101 #define AO_INTERVAL_TICKS AO_SEC_TO_TICKS(10)
103 #define abs(a) ((a) < 0 ? -(a) : (a))
109 ao_flight_state = ao_flight_startup;
113 * Process ADC samples, just looping
114 * until the sensors are calibrated.
119 switch (ao_flight_state) {
120 case ao_flight_startup:
122 /* Check to see what mode we should go to.
123 * - Invalid mode if accel cal appears to be out
124 * - pad mode if we're upright,
125 * - idle mode otherwise
128 if (ao_config.accel_plus_g == 0 ||
129 ao_config.accel_minus_g == 0 ||
130 ao_ground_accel < ao_config.accel_plus_g - ACCEL_NOSE_UP ||
131 ao_ground_accel > ao_config.accel_minus_g + ACCEL_NOSE_UP
133 || ao_ground_height < -1000 ||
134 ao_ground_height > 7000
138 /* Detected an accel value outside -1.5g to 1.5g
139 * (or uncalibrated values), so we go into invalid mode
141 ao_flight_state = ao_flight_invalid;
143 #if HAS_RADIO && PACKET_HAS_SLAVE
144 /* Turn on packet system in invalid mode on TeleMetrum */
145 ao_packet_slave_start();
149 if (!ao_flight_force_idle
151 && ao_ground_accel < ao_config.accel_plus_g + ACCEL_NOSE_UP
155 /* Set pad mode - we can fly! */
156 ao_flight_state = ao_flight_pad;
157 #if HAS_USB && !HAS_FLIGHT_DEBUG && !HAS_SAMPLE_PROFILE && !DEBUG
158 /* Disable the USB controller in flight mode
162 if (!ao_fake_flight_active)
167 #if !HAS_ACCEL && PACKET_HAS_SLAVE
168 /* Disable packet mode in pad state on TeleMini */
169 ao_packet_slave_stop();
173 /* Turn on telemetry system */
175 ao_telemetry_set_interval(AO_TELEMETRY_INTERVAL_PAD);
178 /* signal successful initialization by turning off the LED */
179 ao_led_off(AO_LED_RED);
183 ao_flight_state = ao_flight_idle;
184 #if HAS_SENSOR_ERRORS
185 if (ao_sensor_errors)
186 ao_flight_state = ao_flight_invalid;
189 #if HAS_ACCEL && HAS_RADIO && PACKET_HAS_SLAVE
190 /* Turn on packet system in idle mode on TeleMetrum */
191 ao_packet_slave_start();
195 /* signal successful initialization by turning off the LED */
196 ao_led_off(AO_LED_RED);
199 /* wakeup threads due to state change */
200 ao_wakeup(&ao_flight_state);
206 * barometer: > 20m vertical motion
208 * accelerometer: > 2g AND velocity > 5m/s
210 * The accelerometer should always detect motion before
211 * the barometer, but we use both to make sure this
212 * transition is detected. If the device
213 * doesn't have an accelerometer, then ignore the
214 * speed and acceleration as they are quite noisy
217 if (ao_height > AO_M_TO_HEIGHT(20)
219 || (ao_accel > AO_MSS_TO_ACCEL(20) &&
220 ao_speed > AO_MS_TO_SPEED(5))
224 ao_flight_state = ao_flight_boost;
225 ao_wakeup(&ao_flight_state);
227 ao_launch_tick = ao_boost_tick = ao_sample_tick;
229 /* start logging data */
235 /* Increase telemetry rate */
236 ao_telemetry_set_interval(AO_TELEMETRY_INTERVAL_FLIGHT);
238 /* disable RDF beacon */
243 /* Record current GPS position by waking up GPS log tasks */
244 ao_gps_new = AO_GPS_NEW_DATA | AO_GPS_NEW_TRACKING;
245 ao_wakeup(&ao_gps_new);
249 case ao_flight_boost:
253 * accelerometer: start to fall at > 1/4 G
255 * time: boost for more than 15 seconds
257 * Detects motor burn out by the switch from acceleration to
258 * deceleration, or by waiting until the maximum burn duration
259 * (15 seconds) has past.
261 if ((ao_accel < AO_MSS_TO_ACCEL(-2.5)) ||
262 (int16_t) (ao_sample_tick - ao_boost_tick) > BOOST_TICKS_MAX)
266 ao_flight_state = ao_flight_fast;
268 ao_flight_state = ao_flight_coast;
270 /* Initialize landing detection interval values */
271 ao_interval_end = ao_sample_tick + AO_INTERVAL_TICKS;
273 init_bounds(ao_sample_accel_along, ao_interval_min_accel_along, ao_interval_max_accel_along);
274 init_bounds(ao_sample_accel_across, ao_interval_min_accel_across, ao_interval_max_accel_across);
275 init_bounds(ao_sample_accel_through, ao_interval_min_accel_through, ao_interval_max_accel_through);
277 ao_coast_avg_accel = ao_accel;
279 ao_flight_state = ao_flight_coast;
281 ao_wakeup(&ao_flight_state);
285 #if HAS_ACCEL && HAS_BARO
288 * This is essentially the same as coast,
289 * but the barometer is being ignored as
290 * it may be unreliable.
292 if (ao_speed < AO_MS_TO_SPEED(AO_MAX_BARO_SPEED))
294 ao_flight_state = ao_flight_coast;
295 ao_wakeup(&ao_flight_state);
300 case ao_flight_coast:
304 * By customer request - allow the user
305 * to lock out apogee detection for a specified
308 if (ao_config.apogee_lockout) {
309 if ((int16_t) (ao_sample_tick - ao_launch_tick) <
310 AO_SEC_TO_TICKS(ao_config.apogee_lockout))
314 /* apogee detect: coast to drogue deploy:
318 * Also make sure the model altitude is tracking
319 * the measured altitude reasonably closely; otherwise
320 * we're probably transsonic.
322 #define AO_ERROR_BOUND 100
326 && (ao_sample_alt >= AO_MAX_BARO_HEIGHT || ao_error_h_sq_avg < AO_ERROR_BOUND)
330 /* enter drogue state */
331 ao_flight_state = ao_flight_drogue;
332 ao_wakeup(&ao_flight_state);
334 /* slow down the telemetry system */
335 ao_telemetry_set_interval(AO_TELEMETRY_INTERVAL_RECOVER);
337 /* Turn the RDF beacon back on */
342 #else /* not HAS_BARO */
345 * accel: values stable
347 check_bounds(ao_sample_accel_along, ao_interval_min_accel_along, ao_interval_max_accel_along);
348 check_bounds(ao_sample_accel_across, ao_interval_min_accel_across, ao_interval_max_accel_across);
349 check_bounds(ao_sample_accel_through, ao_interval_min_accel_through, ao_interval_max_accel_through);
351 #define MAX_QUIET_ACCEL 2
353 if ((int16_t) (ao_sample_tick - ao_interval_end) >= 0) {
354 if (ao_interval_max_accel_along - ao_interval_min_accel_along <= ao_data_accel_to_sample(MAX_QUIET_ACCEL) &&
355 ao_interval_max_accel_across - ao_interval_min_accel_across <= ao_data_accel_to_sample(MAX_QUIET_ACCEL) &&
356 ao_interval_max_accel_through - ao_interval_min_accel_through <= ao_data_accel_to_sample(MAX_QUIET_ACCEL))
358 ao_flight_state = ao_flight_landed;
359 ao_wakeup(&ao_flight_state);
361 /* turn off the ADC capture */
362 ao_timer_set_adc_interval(0);
366 /* Reset interval values */
367 ao_interval_end = ao_sample_tick + AO_INTERVAL_TICKS;
369 init_bounds(ao_sample_accel_along, ao_interval_min_accel_along, ao_interval_max_accel_along);
370 init_bounds(ao_sample_accel_across, ao_interval_min_accel_across, ao_interval_max_accel_across);
371 init_bounds(ao_sample_accel_through, ao_interval_min_accel_through, ao_interval_max_accel_through);
379 ao_coast_avg_accel = ao_coast_avg_accel + ((ao_accel - ao_coast_avg_accel) >> 5);
380 if (ao_coast_avg_accel > AO_MSS_TO_ACCEL(20)) {
381 ao_boost_tick = ao_sample_tick;
382 ao_flight_state = ao_flight_boost;
383 ao_wakeup(&ao_flight_state);
390 case ao_flight_drogue:
392 /* drogue to main deploy:
394 * barometer: reach main deploy altitude
396 * Would like to use the accelerometer for this test, but
397 * the orientation of the flight computer is unknown after
398 * drogue deploy, so we ignore it. Could also detect
399 * high descent rate using the pressure sensor to
400 * recognize drogue deploy failure and eject the main
401 * at that point. Perhaps also use the drogue sense lines
402 * to notice continutity?
404 if (ao_height <= ao_config.main_deploy)
406 ao_flight_state = ao_flight_main;
407 ao_wakeup(&ao_flight_state);
410 * Start recording min/max height
411 * to figure out when the rocket has landed
414 /* initialize interval values */
415 ao_interval_end = ao_sample_tick + AO_INTERVAL_TICKS;
417 ao_interval_min_height = ao_interval_max_height = ao_avg_height;
421 /* fall through... */
426 * barometer: altitude stable
428 if (ao_avg_height < ao_interval_min_height)
429 ao_interval_min_height = ao_avg_height;
430 if (ao_avg_height > ao_interval_max_height)
431 ao_interval_max_height = ao_avg_height;
433 if ((int16_t) (ao_sample_tick - ao_interval_end) >= 0) {
434 if (ao_interval_max_height - ao_interval_min_height <= AO_M_TO_HEIGHT(4))
436 ao_flight_state = ao_flight_landed;
437 ao_wakeup(&ao_flight_state);
439 /* turn off the ADC capture */
440 ao_timer_set_adc_interval(0);
443 ao_interval_min_height = ao_interval_max_height = ao_avg_height;
444 ao_interval_end = ao_sample_tick + AO_INTERVAL_TICKS;
447 #endif /* HAS_BARO */
451 printf ("angle %4d pitch %7d yaw %7d roll %7d\n",
453 ((ao_sample_pitch << 9) - ao_ground_pitch) >> 9,
454 ((ao_sample_yaw << 9) - ao_ground_yaw) >> 9,
455 ((ao_sample_roll << 9) - ao_ground_roll) >> 9);
459 #endif /* HAS_FLIGHT_DEBUG */
467 static inline int int_part(ao_v_t i) { return i >> 4; }
468 static inline int frac_part(ao_v_t i) { return ((i & 0xf) * 100 + 8) / 16; }
476 accel = ((ao_config.accel_plus_g - ao_sample_accel) * ao_accel_scale) >> 16;
479 printf ("sample:\n");
480 printf (" tick %d\n", ao_sample_tick);
482 printf (" raw pres %d\n", ao_sample_pres);
485 printf (" raw accel %d\n", ao_sample_accel);
488 printf (" ground pres %d\n", ao_ground_pres);
489 printf (" ground alt %d\n", ao_ground_height);
492 printf (" raw accel %d\n", ao_sample_accel);
493 printf (" groundaccel %d\n", ao_ground_accel);
494 printf (" accel_2g %d\n", ao_accel_2g);
498 printf (" alt %d\n", ao_sample_alt);
499 printf (" height %d\n", ao_sample_height);
503 printf (" accel %d.%02d\n", int_part(accel), frac_part(accel));
507 printf ("kalman:\n");
508 printf (" height %d\n", ao_height);
509 printf (" speed %d.%02d\n", int_part(ao_speed), frac_part(ao_speed));
510 printf (" accel %d.%02d\n", int_part(ao_accel), frac_part(ao_accel));
511 printf (" max_height %d\n", ao_max_height);
512 printf (" avg_height %d\n", ao_avg_height);
513 printf (" error_h %d\n", ao_error_h);
515 printf (" error_avg %d\n", ao_error_h_sq_avg);
522 ao_flight_state = ao_flight_test;
524 ao_flight_state = ao_flight_idle;
527 uint8_t ao_orient_test;
530 ao_orient_test_select(void)
532 ao_orient_test = !ao_orient_test;
535 const struct ao_cmds ao_flight_cmds[] = {
536 { ao_flight_dump, "F\0Dump flight status" },
537 { ao_gyro_test, "G\0Test gyro code" },
538 { ao_orient_test_select,"O\0Test orientation code" },
543 static struct ao_task flight_task;
548 ao_flight_state = ao_flight_startup;
550 ao_cmd_register(&ao_flight_cmds[0]);
552 ao_add_task(&flight_task, ao_flight, "flight");