2 * Copyright © 2012 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.
22 #define GRAVITY 9.80665
25 #define AO_DATA_ADC (1 << 0)
31 #include <ao_ms5607.h>
32 #define AO_DATA_MS5607 (1 << 1)
34 #define AO_DATA_MS5607 0
38 #include <ao_mpu6000.h>
39 #define AO_DATA_MPU6000 (1 << 2)
41 #define AO_DATA_MPU6000 0
45 #include <ao_mpu9250.h>
46 #define AO_DATA_MPU9250 (1 << 2)
48 #define AO_DATA_MPU9250 0
52 #include <ao_hmc5883.h>
53 #define AO_DATA_HMC5883 (1 << 3)
55 #define AO_DATA_HMC5883 0
59 #include <ao_mmc5983.h>
60 #define AO_DATA_MMC5983 (1 << 3)
62 #define AO_DATA_MMC5983 0
66 #include <ao_mma655x.h>
67 #define AO_DATA_MMA655X (1 << 4)
69 #define AO_DATA_MMA655X 0
73 #include <ao_adxl375.h>
74 #define AO_DATA_ADXL375 (1 << 4)
76 #define AO_DATA_ADXL375 0
80 #include <ao_max6691.h>
81 #define AO_DATA_MAX6691 (1 << 4)
83 #define AO_DATA_MAX6691 0
87 #include <ao_bmx160.h>
88 #define AO_DATA_BMX160 (1 << 2)
90 #define AO_DATA_BMX160 0
94 #include <ao_bmi088.h>
95 #define AO_DATA_BMI088 (1 << 2)
97 #define AO_DATA_BMI088 0
100 #ifndef HAS_SENSOR_ERRORS
101 #if HAS_IMU || HAS_MMA655X || HAS_MS5607 || HAS_MS5611
102 #define HAS_SENSOR_ERRORS 1
106 #if HAS_SENSOR_ERRORS
107 extern uint8_t ao_sensor_errors;
112 #define AO_DATA_ALL (AO_DATA_ADC|AO_DATA_MS5607|AO_DATA_MPU6000|AO_DATA_HMC5883|AO_DATA_MMA655X|AO_DATA_MPU9250|AO_DATA_ADXL375|AO_DATA_BMX160|AO_DATA_MMC5983|AO_DATA_BMI088)
120 struct ao_ms5607_sample ms5607_raw;
121 struct ao_ms5607_value ms5607_cooked;
124 struct ao_mpu6000_sample mpu6000;
130 struct ao_mpu9250_sample mpu9250;
136 struct ao_hmc5883_sample hmc5883;
139 struct ao_mmc5983_sample mmc5983;
145 struct ao_adxl375_sample adxl375;
148 struct ao_max6691_sample max6691;
151 struct ao_ads131a0x_sample ads131a0x;
154 struct ao_bmx160_sample bmx160;
160 struct ao_bmi088_sample bmi088;
167 #define ao_data_ring_next(n) (((n) + 1) & (AO_DATA_RING - 1))
168 #define ao_data_ring_prev(n) (((n) - 1) & (AO_DATA_RING - 1))
170 /* Get a copy of the last complete sample set */
172 ao_data_get(struct ao_data *packet);
174 extern volatile struct ao_data ao_data_ring[AO_DATA_RING];
175 extern volatile uint8_t ao_data_head;
176 extern volatile uint8_t ao_data_present;
177 extern volatile uint8_t ao_data_count;
180 * Mark a section of data as ready, check for data complete
182 #define AO_DATA_PRESENT(bit) (ao_data_present |= (bit))
185 * Mark sensor failed, and unblock the sample collection code by
186 * marking the data as present
188 #define AO_SENSOR_ERROR(bit) (ao_data_present |= (ao_sensor_errors |= (bit)))
191 * Wait until it is time to write a sensor sample; this is
192 * signaled by the timer tick
194 #define AO_DATA_WAIT() ao_sleep((void *) &ao_data_count)
196 #endif /* AO_DATA_RING */
198 #define AO_ALT_TYPE int32_t
200 typedef AO_ALT_TYPE alt_t;
202 #if !HAS_BARO && HAS_MS5607
204 /* Either an MS5607 or an MS5611 hooked to a SPI port
209 typedef int32_t pres_t;
211 #define ao_data_pres_cook(packet) ao_ms5607_convert(&packet->ms5607_raw, &packet->ms5607_cooked)
213 #define ao_data_pres(packet) ((packet)->ms5607_cooked.pres)
214 #define ao_data_temp(packet) ((int16_t) (packet)->ms5607_cooked.temp)
216 #define pres_to_altitude(p) ao_pa_to_altitude(p)
221 * Need a few macros to pull data from the sensors:
223 * ao_data_accel_raw - pull raw sensor
224 * ao_data_accel_invert - flip rocket ends for positive acceleration
229 /* This section is for an analog accelerometer hooked to one of the ADC pins. As
230 * those are 5V parts, this also requires that the 5V supply be hooked to to anothe ADC
231 * pin so that the both can be measured to correct for changes between the 3.3V and 5V rails
234 typedef int16_t accel_t;
235 #define ao_data_accel_raw(packet) ((packet)->adc.accel)
236 #define ao_data_accel_invert(a) (0x7fff -(a))
239 * Ok, the math here is a bit tricky.
241 * ao_sample_accel: ADC output for acceleration
242 * ao_accel_ref: ADC output for the 5V reference.
243 * ao_cook_accel: Corrected acceleration value
244 * Vcc: 3.3V supply to the CC1111
245 * Vac: 5V supply to the accelerometer
246 * accel: input voltage to accelerometer ADC pin
247 * ref: input voltage to 5V reference ADC pin
250 * Measured acceleration is ratiometric to Vcc:
252 * ao_sample_accel accel
253 * ------------ = -----
256 * Measured 5v reference is also ratiometric to Vcc:
259 * ------------ = -----
263 * ao_accel_ref = 32767 * (ref / Vcc)
265 * Acceleration is measured ratiometric to the 5V supply,
266 * so what we want is:
268 * ao_cook_accel accel
269 * ------------- = -----
277 * ao_sample_accel 32767
278 * = ------------ * ------------
281 * Multiply through by 32767:
283 * ao_sample_accel * 32767
284 * ao_cook_accel = --------------------
287 * Now, the tricky part. Getting this to compile efficiently
288 * and keeping all of the values in-range.
290 * First off, we need to use a shift of 16 instead of * 32767 as SDCC
291 * does the obvious optimizations for byte-granularity shifts:
293 * ao_cook_accel = (ao_sample_accel << 16) / ao_accel_ref
295 * Next, lets check our input ranges:
297 * 0 <= ao_sample_accel <= 0x7fff (singled ended ADC conversion)
298 * 0x7000 <= ao_accel_ref <= 0x7fff (the 5V ref value is close to 0x7fff)
300 * Plugging in our input ranges, we get an output range of 0 - 0x12490,
301 * which is 17 bits. That won't work. If we take the accel ref and shift
302 * by a bit, we'll change its range:
304 * 0xe000 <= ao_accel_ref<<1 <= 0xfffe
306 * ao_cook_accel = (ao_sample_accel << 16) / (ao_accel_ref << 1)
308 * Now the output range is 0 - 0x9248, which nicely fits in 16 bits. It
309 * is, however, one bit too large for our signed computations. So, we
310 * take the result and shift that by a bit:
312 * ao_cook_accel = ((ao_sample_accel << 16) / (ao_accel_ref << 1)) >> 1
314 * This finally creates an output range of 0 - 0x4924. As the ADC only
315 * provides 11 bits of data, we haven't actually lost any precision,
316 * just dropped a bit of noise off the low end.
321 #define ao_data_accel_raw(packet) \
322 ((uint16_t) ((((uint32_t) (packet)->adc.accel << 16) / ((packet)->adc.accel_ref << 1))) >> 1)
326 #define ao_data_accel_raw(packet) ((packet)->adc.accel)
328 #endif /* HAS_ACCEL_REF */
330 #endif /* HAS_ACCEL */
332 #if !HAS_ACCEL && HAS_MMA655X
336 typedef int16_t accel_t;
338 /* MMA655X is hooked up so that positive values represent negative acceleration */
340 #define AO_ACCEL_INVERT 4095
342 #ifndef AO_MMA655X_INVERT
343 #error AO_MMA655X_INVERT not defined
346 #if AO_MMA655X_INVERT
347 #define ao_data_accel_raw(packet) ((accel_t) (AO_ACCEL_INVERT - (packet)->mma655x))
349 #define ao_data_accel_raw(packet) ((accel_t) (packet)->mma655x)
351 #define ao_data_accel_invert(accel) (AO_ACCEL_INVERT - (accel))
355 #if !HAS_ACCEL && HAS_ADXL375
359 typedef int16_t accel_t;
361 #ifndef AO_ADXL375_INVERT
362 #error AO_ADXL375_INVERT not defined
365 #if AO_ADXL375_INVERT
366 #define ao_data_accel_raw(packet) (-(packet)->adxl375.AO_ADXL375_AXIS)
368 #define ao_data_accel_raw(packet) ((packet)->adxl375.AO_ADXL375_AXIS)
370 #define ao_data_accel_invert(accel) (-(accel))
373 #define ao_data_along(packet) ((packet)->adxl375.AO_ADXL375_AXIS)
374 #define ao_data_across(packet) ((packet)->adxl375.AO_ADXL375_ACROSS_AXIS)
375 #define ao_data_through(packet) ((packet)->adxl375.z)
376 #define ao_data_accel_to_sample(accel) ao_adxl375_accel_to_sample(accel)
379 #endif /* HAS_ADXL375 */
381 #if !HAS_ACCEL && HAS_MPU6000
385 typedef int16_t accel_t;
387 /* MPU6000 is hooked up so that positive y is positive acceleration */
388 #define ao_data_accel_raw(packet) (-(packet)->mpu6000.accel_y)
389 #define ao_data_accel_invert(a) (-(a))
393 #if !HAS_GYRO && HAS_MPU6000
397 typedef int16_t gyro_t; /* in raw sample units */
398 typedef int16_t angle_t; /* in degrees */
400 /* Y axis is aligned with the direction of motion (along) */
401 /* X axis is aligned in the other board axis (across) */
402 /* Z axis is aligned perpendicular to the board (through) */
404 #ifndef ao_data_along
405 #define ao_data_along(packet) ((packet)->mpu6000.accel_y)
406 #define ao_data_across(packet) ((packet)->mpu6000.accel_x)
407 #define ao_data_through(packet) ((packet)->mpu6000.accel_z)
409 #define ao_data_roll(packet) ((packet)->mpu6000.gyro_y)
410 #define ao_data_pitch(packet) ((packet)->mpu6000.gyro_x)
411 #define ao_data_yaw(packet) ((packet)->mpu6000.gyro_z)
414 static inline float ao_convert_gyro(float sensor)
416 return ao_mpu6000_gyro(sensor);
419 static inline float ao_convert_accel(int16_t sensor)
421 return ao_mpu6000_accel(sensor);
426 #if !HAS_ACCEL && HAS_MPU9250
430 typedef int16_t accel_t;
432 /* MPU9250 is hooked up so that positive y is positive acceleration */
433 #define ao_data_accel_raw(packet) (-(packet)->mpu9250.accel_y)
434 #define ao_data_accel_invert(a) (-(a))
438 #if !HAS_GYRO && HAS_MPU9250
442 typedef int16_t gyro_t; /* in raw sample units */
443 typedef int16_t angle_t; /* in degrees */
445 /* Y axis is aligned with the direction of motion (along) */
446 /* X axis is aligned in the other board axis (across) */
447 /* Z axis is aligned perpendicular to the board (through) */
449 #ifndef ao_data_along
450 #define ao_data_along(packet) ((packet)->mpu9250.accel_y)
451 #define ao_data_across(packet) ((packet)->mpu9250.accel_x)
452 #define ao_data_through(packet) ((packet)->mpu9250.accel_z)
454 #define ao_data_roll(packet) ((packet)->mpu9250.gyro_y)
455 #define ao_data_pitch(packet) ((packet)->mpu9250.gyro_x)
456 #define ao_data_yaw(packet) ((packet)->mpu9250.gyro_z)
459 static inline float ao_convert_gyro(float sensor)
461 return ao_mpu9250_gyro(sensor);
464 static inline float ao_convert_accel(int16_t sensor)
466 return ao_mpu9250_accel(sensor);
471 #if !HAS_ACCEL && HAS_BMX160
475 typedef int16_t accel_t;
477 #define ao_data_accel_raw(packet) -ao_data_along(packet)
478 #define ao_data_accel_invert(a) (-(a))
479 #define ao_data_accel_to_sample(accel) ao_bmx_accel_to_sample(accel)
483 #if !HAS_GYRO && HAS_BMX160
487 typedef int16_t gyro_t; /* in raw sample units */
488 typedef int16_t angle_t; /* in degrees */
490 /* X axis is aligned with the direction of motion (along) */
491 /* Y axis is aligned in the other board axis (across) */
492 /* Z axis is aligned perpendicular to the board (through) */
494 static inline float ao_convert_gyro(float sensor)
496 return ao_bmx160_gyro(sensor);
499 static inline float ao_convert_accel(int16_t sensor)
501 return ao_bmx160_accel(sensor);
506 #if !HAS_ACCEL && HAS_BMI088
510 typedef int16_t accel_t;
512 #define ao_data_accel_raw(packet) -ao_data_along(packet)
513 #define ao_data_accel_invert(a) (-(a))
514 #define ao_data_accel_to_sample(accel) ao_bmi_accel_to_sample(accel)
518 #if !HAS_GYRO && HAS_BMI088
522 typedef int16_t gyro_t; /* in raw sample units */
523 typedef int16_t angle_t; /* in degrees */
525 /* X axis is aligned with the direction of motion (along) */
526 /* Y axis is aligned in the other board axis (across) */
527 /* Z axis is aligned perpendicular to the board (through) */
529 static inline float ao_convert_gyro(float sensor)
531 return ao_bmi088_gyro(sensor);
534 static inline float ao_convert_accel(int16_t sensor)
536 return ao_bmi088_accel(sensor);
541 #if !HAS_MAG && HAS_HMC5883
545 typedef int16_t ao_mag_t; /* in raw sample units */
547 #define ao_data_mag_along(packet) ((packet)->hmc5883.x)
548 #define ao_data_mag_across(packet) ((packet)->hmc5883.y)
549 #define ao_data_mag_through(packet) ((packet)->hmc5883.z)
553 #if !HAS_MAG && HAS_MMC5983
557 typedef int16_t ao_mag_t; /* in raw sample units */
561 #if !HAS_MAG && HAS_MPU9250
565 typedef int16_t ao_mag_t; /* in raw sample units */
567 /* Note that this order is different from the accel and gyro. For some
568 * reason, the mag sensor axes aren't the same as the other two
569 * sensors. Also, the Z axis is flipped in sign.
572 #ifndef ao_data_mag_along
573 #define ao_data_mag_along(packet) ((packet)->mpu9250.mag_x)
574 #define ao_data_mag_across(packet) ((packet)->mpu9250.mag_y)
575 #define ao_data_mag_through(packet) ((packet)->mpu9250.mag_z)
583 ao_data_fill(int head) {
584 if (ao_data_present == AO_DATA_ALL) {
586 ao_data_ring[head].ms5607_raw = ao_ms5607_current;
589 ao_data_ring[head].mma655x = ao_mma655x_current;
592 ao_data_ring[head].hmc5883 = ao_hmc5883_current;
595 ao_data_ring[head].mmc5983 = ao_mmc5983_current;
598 ao_data_ring[head].mpu6000 = ao_mpu6000_current;
601 ao_data_ring[head].mpu9250 = ao_mpu9250_current;
604 ao_data_ring[head].adxl375 = ao_adxl375_current;
607 ao_data_ring[head].max6691 = ao_max6691_current;
610 ao_data_ring[head].ads131a0x = ao_ads131a0x_current;
613 ao_data_ring[head].bmx160 = ao_bmx160_current;
616 ao_data_ring[head].bmi088 = ao_bmi088_current;
618 ao_data_ring[head].tick = ao_tick_count;
619 ao_data_head = ao_data_ring_next(head);
620 ao_wakeup((void *) &ao_data_head);
628 ao_data_accel(volatile struct ao_data *packet);
631 #endif /* _AO_DATA_H_ */