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838 Commits

Author SHA1 Message Date
Andrew Tridgell 70246cf954 AP_Compass: added notify events (LEDs and buzzer) for learning 2018-10-24 07:25:42 +10:00
Andrew Tridgell 23ddd994ec AP_Compass: allow multiple COMPASS_LEARN runs per boot 2018-10-24 07:25:42 +10:00
Andrew Tridgell 026089747d AP_Compass: use LEARN_NONE on learn completion 
master doesn't yet have the statistical EKF learning
 2018-10-24 07:25:42 +10:00
Andrew Tridgell 0a7170774a AP_Compass: allow learning of all compasses 
slave secondary compasses to primary
 2018-10-24 07:25:42 +10:00
Andrew Tridgell 5ac6309848 AP_Compass: enable in-flight compass learning system 
using COMPASS_LEARN=3
 2018-10-24 07:25:42 +10:00
Andrew Tridgell 84d7160128 AP_Compass: use new accumulate functions for UAVCAN 2018-10-19 16:03:45 +11:00
Andrew Tridgell 579a84b53e AP_Compass: use new accumulate functions for AK8963 2018-10-19 16:03:45 +11:00
Andrew Tridgell 55e4b64755 AP_Compass: don't apply offsets twice in SITL 2018-10-19 16:03:45 +11:00
Andrew Tridgell 925555c995 AP_Compass: move accum fields to frontend 
this is needed to ensure they are per-instance. Without this the SITL
backend produces zero for all but the first instance. The same would
be true for any multi-instance backend
 2018-10-17 12:54:22 +11:00
Andrew Tridgell 83065d5e88 AP_Compass: convert SITL to new accumulate approach 2018-10-17 12:54:22 +11:00
Andrew Tridgell a260792e9e AP_Compass: use WITH_SEMAPHORE() 
and removed usage of hal.util->new_semaphore()
 2018-10-17 12:54:22 +11:00
vierfuffzig b455c7a769 AP_Compass: add rotation option for AK8963_MPU9250 
allows using non-neutrally rotated AK8963 compass on MPU9250 as internal
reference: https://github.com/ArduPilot/ardupilot/pull/9459
 2018-10-17 09:35:49 +11:00
Andrew Tridgell 0b9d0a4559 AP_Compass: removed incorrect semaphore take() in QMC5883L driver 2018-10-16 10:47:26 -07:00
Lucas De Marchi 1a9c386df2 AP_Compass: MMC3416: use common method to accumulate samples 2018-10-15 14:41:09 -07:00
Lucas De Marchi e83b345cbb AP_Compass: MAG3110: use common method to accumulate samples 2018-10-15 14:41:09 -07:00
Lucas De Marchi ac2771b311 AP_Compass: LSM9DS1: use common method to accumulate samples 2018-10-15 14:41:09 -07:00
Lucas De Marchi 2324a28e39 AP_Compass: LSM303D: use common method to accumulate samples 2018-10-15 14:41:09 -07:00
Lucas De Marchi 38d1f8705f AP_Compass: LIS3MDL: use common method to accumulate samples 2018-10-15 14:41:09 -07:00
Lucas De Marchi b05b3b9932 AP_Compass: IST8310: use common method to accumulate samples 2018-10-15 14:41:09 -07:00
Lucas De Marchi 8d54276263 AP_Compass: BMM150: use common method to accumulate samples 2018-10-15 14:41:09 -07:00
Lucas De Marchi 565df5ec94 AP_Compass: AK09916: use common method to accumulate samples 2018-10-15 14:41:09 -07:00
Lucas De Marchi e769c6932f AP_Compass: QMC5883L: use common method to accumulate samples 2018-10-15 14:41:09 -07:00
Lucas De Marchi c0bccdaed6 AP_Compass: HMC5843: use common method to accumulate samples 2018-10-15 14:41:09 -07:00
Lucas De Marchi 329516373c AP_Compass: add common method to accumulate and drain samples 
Instead of repeating on each driver the same sequence of steps,
let's move them to the common parent class. This only implements
it, but no driver was ported yet.
 2018-10-15 14:41:09 -07:00
Andrew Tridgell 2f2be6afda AP_Compass: use rotation_equal() from AP_Compass 2018-10-01 14:26:56 +09:00
Andrew Tridgell 803f255c73 AP_Compass: fixed handling of duplication rotations 
we have some rotations that are duplicated, such as ROLL_180_YAW_90
and PITCH_180_YAW_270. This copes with those in the auto-orientation
code
 2018-10-01 14:26:56 +09:00
Lucas De Marchi 93d99dacd1 AP_Compass: UAVCAN: remove additional semaphore 
We already inherit from AP_Compass_Backend, so use the semaphore from
there to synchronize with the main thread, like the other backends.
 2018-09-06 08:23:02 +10:00
Lucas De Marchi cd9b08dbae AP_Compass: rename variable for more buses 
"all_external" reflects better the fact that we can have more than 2
buses (and now we are using the foreach macro).
 2018-09-06 08:23:02 +10:00
Lucas De Marchi de535dc573 AP_Compass: remove unused external and name arguments 
Aka "fix copy and pasta".
 2018-09-06 08:23:02 +10:00
Lucas De Marchi 4039b51810 AP_Compass: stop passing frontend pointer 
Let AP_Compass_Backend call AP::compass() *once* instead of passing
the frontend pointer over and over.
 2018-09-06 08:23:02 +10:00
Lucas De Marchi 585b6dce0d AP_Compass: support more external compasses on aerofc 
Let it probe on external bus. Aerofc has an HMC5883 on internal bus, but
we don't want it enabled as it interferes with the internal baro. Also
the rotation for the compass that comes with Aero RTF is different from
the other that got added later. That means people would need to orient a
third party IST8310-based compass differently on Aero RTF than on other
boards... that's a problem of having orientation based on the chip that
can't be solved on this commit.
 2018-09-06 08:23:02 +10:00
liang.tang 2c0b9a16a5 AP_Compass: fix UAVCAN mag message handlers 2018-09-05 17:22:34 +10:00
Siddharth Purohit 14b701cff8 AP_Compass: move UAVCAN mag subscribers and handlers to Compass Backend 2018-08-29 22:54:59 +01:00
Francisco Ferreira 317e8e0296
AP_Compass: adapt to changes in AP_BoardConfig_CAN 2018-08-12 13:35:03 +01:00
Andrew Tridgell 3ed7c060df AP_Compass: address review comments 2018-08-07 10:00:10 +10:00
Jonathan Challinger cefd998177 AP_Compass: add expected DEV_ID parameters 2018-08-07 10:00:10 +10:00
Jonathan Challinger 878e84a015 AP_Compass: correct edge case where checks pass when saved dev_id != detected dev_id 2018-08-07 10:00:10 +10:00
Randy Mackay c88926f227 Compass: remove accumulate from example sketch 2018-08-06 11:05:34 +10:00
Randy Mackay 99b54935db Compass: remove accumulate 
this method is a noop on all backends
 2018-08-06 11:05:34 +10:00
Andrew Tridgell 2ded88e611 AP_Compass: allow override of QMC5883L orientation 2018-07-30 17:26:19 +10:00
Randy Mackay cb3731e08e Compass: fix compile warning in calibrator output 2018-07-30 14:57:01 +10:00
Andrew Tridgell e39d070b78 AP_Compass: clear DEV_ID for undetected compasses 
this prevents user confusion with the number of compasses detected
 2018-07-30 13:07:55 +10:00
Andrew Tridgell b181340fd9 AP_Compass: allow override of COMPASS_AUTO_ROT 2018-07-28 18:05:12 +10:00
Andrew Tridgell cbd6f4cc21 AP_Compass: fixed compass for tailsitters in SITL 2018-07-20 14:21:06 +10:00
Andrew Tridgell 027beb0dc1 AP_Compass: rename COMPASS_ROT_AUTO to COMPASS_AUTO_ROT 
request from Randy
 2018-07-18 16:07:19 +10:00
Andrew Tridgell 15d2daabf0 AP_Compass: don't do auto-orientation if using ROTATION_CUSTOM 2018-07-18 16:07:19 +10:00
Andrew Tridgell a73492b40a AP_Compass: fixed newline in statustext 2018-07-18 16:07:19 +10:00
Andrew Tridgell 196ba0e858 AP_Compass: make COMPASS_ROT_AUTO take 3 values 
0 for disabled, 1 for check only, 2 for check and fix
 2018-07-18 16:07:19 +10:00
Andrew Tridgell d15a4ad92a AP_Compass: improved error reporting, check all compasses 
this uses extensions to the MAG_CAL_REPORT message to convey failures
of orientation checking.

It also checks all compasses, external or internal. It only tries to
fix the orientation if it is external
 2018-07-18 16:07:19 +10:00
Andrew Tridgell a5749c1869 AP_Compass: allow diagonals and off-diagonals to be calculated on rot change 
this re-runs the fit on change in orientation
 2018-07-18 16:07:19 +10:00
Andrew Tridgell b4c7d1925e AP_Compass: allow for runtime changes to SIM_MAG_DIA_? 
this makes for easier testing
 2018-07-18 16:07:19 +10:00
Andrew Tridgell 3c2e8baee2 AP_Compass: improved orientation reporting 
and fail magcal if we fail orientation detection for an external
compass
 2018-07-18 16:07:19 +10:00
Andrew Tridgell 8b0f40b402 AP_Compass: implement automatic compass orientation 
this automatically determines the compass orientation when doing a 3D
compass calibration, if COMPASS_ROT_AUTO is enabled.
 2018-07-18 16:07:19 +10:00
Andrew Tridgell 4acc06df87 AP_Compass: support diagonal, off-diagonal and rotation in SITL 
compass
 2018-07-18 16:07:19 +10:00
Andrew Tridgell 3c0ed01fd0 AP_Compass: prevent use of null dev_icm device in ICM20948 driver 2018-07-14 17:51:50 +10:00
Andrew Tridgell 71647cfc6b AP_Compass: removed HMC5843 compass probe error 2018-07-14 17:51:50 +10:00
Andrew Tridgell ff6d639ed7 AP_Compass: separated out external compass probing 
this allows any ChibiOS board to specify that it wants to probe for
all possible external compass types with a define in hwdef.dat

It also implements duplicate compass detection for all i2c drivers,
ensuring we can't get a load of a driver on the same bus/address twice
 2018-07-14 17:51:50 +10:00
Andrew Tridgell 7ec6522b9d AP_Compass: default to right mag offsets for SITL 2018-07-13 10:19:01 +10:00
Andrew Tridgell 2fe2c8fbda AP_Compass: initialise compass IDs saved in SITL 
this ensures we don't get uncalibrates compasses in SITL
 2018-07-13 10:19:01 +10:00
Andrew Tridgell 823c4523b3 AP_Compass: added SITL device IDs 2018-07-13 10:19:01 +10:00
Andrew Tridgell f88a4b3a2f AP_Compass: fixed compass orientations on PH4 2018-07-10 18:29:14 +10:00
Andrew Tridgell 8fd69250bd AP_Compass: use I2C bus masks 
this allows for external compasses on all external I2C ports, while
retaining existing device ordering
 2018-07-10 15:39:47 +10:00
Peter Barker 051c811bfb AP_Compass: make compass_cal_requires_reboot const 2018-07-03 13:44:11 +10:00
Peter Barker 4c2925d693 AP_Compass: remove pointless initialisations 
If you are allocating one of these on the stack you're doing something
wrong.
 2018-07-02 10:44:34 +10:00
Lucas De Marchi 49d08ba72a Global: remove minlure 
Minlure is a port of ArduPilot to Minnow Board connected to daughter
board. Very few of those were produced and nobody is flying with it.

It served its purpose and all the the improvements to ArduPilot remain
regardless of it not being supported anymore. Now it's just adding
maintenance work with no clear benefit, so pull the plug.
 2018-06-26 07:32:08 -07:00
Peter Barker 9eb53e333b AP_Compass: tidy consistency calculations 
AP_Compass: normalize vectors in-place to save a few bytes (thanks MdB)
 2018-06-26 18:37:55 +10:00
Patrick José Pereira e456655932 AP_Compass: Use SITL singleton 
Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>
 2018-06-26 00:02:01 +01:00
Andrew Tridgell b225868711 AP_Compass: detect conflict between AK09916 and ICM20948 
this detects if we have both a AK09916 and an ICM20948 on the same i2c
bus. If that is found then the ICM20948 is disabled as it otherwise we
will have two devices on the same i2c address
 2018-06-12 09:04:43 +10:00
Eugene Shamaev df6b7ed5ea AP_Compass_UAVCAN: update 2018-06-09 22:46:48 -07:00
Eugene Shamaev 9195ba80fc AP_Compass: helper func 2018-06-09 22:46:48 -07:00
Eugene Shamaev baa6daf270 AP_Compass: reducing indenting by linearizing the logic 2018-06-09 22:46:48 -07:00
Andrew Tridgell 2d9df83ed5 AP_Compass: probe for ist8310 on bus 2 as well as 0 for fmuv5 2018-06-06 15:01:38 +10:00
Andrew Tridgell 99540a184c AP_Compass: enable FMUv5 compass 2018-06-06 07:15:41 +10:00
Andrew Tridgell ccdfc75dd9 AP_Compass: placeholder for FMUv5 2018-06-06 07:15:41 +10:00
Peter Barker a3a1967e05 AP_Compass: add AP::compass() singleton getter 2018-05-17 15:37:14 +10:00
Francisco Ferreira 0a3af28d17 AP_Compass: remove Qualcomm board support 2018-05-17 09:57:20 +10:00
mirkix 85fe07f1f0 AP_Compass: enable probe HMC5843 for PocketPilot 2018-05-12 07:16:50 +10:00
night-ghost 4cffbf52d3 AP_COMPASS: fix MAG3110 driver 2018-05-07 11:45:29 +10:00
night-ghost a05c79f1d8 Compass: fix HAL_F4light compilation errors 2018-04-30 08:32:58 +10:00
Jacob Walser 44d0f7b2a1 AP_Compass: update ORIENT @Values 2018-04-24 13:04:37 +01:00
Jacob Walser 6699c59ad3 AP_Compass: add support for custom board orientations 2018-04-24 13:04:37 +01:00
kozinalexey 444c0bb54c AP_Compass: added ChibiOS external compass config 2018-04-14 11:09:34 +10:00
Andrew Tridgell eccc4f375b AP_Compass: fixed build warning 2018-04-12 11:50:44 +10:00
night-ghost 677f2bebc3 AP_Compass: added autodetect of all known compasses on external bus 2018-04-11 15:00:36 +10:00
night-ghost f26bb0cfbe AP_Compass: added range filter to backend, added its use in some sensors (thanks khancyr for style correction) 2018-04-11 14:46:42 +10:00
Peter Barker face8151b7 AP_Compass: include required header 2018-04-09 11:34:35 +10:00
Michael du Breuil c66d15efd7 AP_Compass: Read current for compensation from the battery singleton 2018-03-27 22:12:21 +01:00
Nathan E dcf127b73d Compass: clarify compass orientation description 
Resolves an error directing users to reference the flight controller (instead of the frame) for COMPASS_ORIENT.
Changed wing to side for all vehicles
 2018-03-21 09:01:45 +09:00
LinJieqiang c73e7f0cf3 add IST8310 compass sensors in AP_Compass.cpp 2018-03-09 11:25:35 -08:00
Andrew Tridgell 8b3db7c09f AP_Compass: allow for HAL_COMPASS_NONE 2018-03-02 12:52:50 +11:00
Andrew Tridgell 487b615faa AP_Compass: allow for override of MAG_BOARD_ORIENTATION 2018-03-02 12:52:50 +11:00
Peter Barker 46dbb248f9 AP_Compass: correct compiler warnings 
In file included from ../../libraries/AP_Compass/AP_Compass.h:14:
../../libraries/AP_Compass/Compass_PerMotor.h:57:13: warning: private
field 'channel' is not used [-Wunused-private-field]
    uint8_t channel;

AP_Compass: fix compiler warning

../../libraries/AP_Compass/AP_Compass_MAG3110.h:52:11: warning: private
field 'compass_len' is not used [-Wunused-private-field]
    float compass_len;
          ^
 2018-03-02 09:26:37 +09:00
Andrew Tridgell f61591c426 AP_Compass: added SP01 board type 2018-02-14 18:27:00 +11:00
Andrew Tridgell 52815cd952 AP_Compass: fixed compass orientation for mini-pix 2018-02-14 18:27:00 +11:00
ljwang 231aa16835 AP_Compass: support mini-pix 2018-02-14 18:27:00 +11:00
Randy Mackay 3bec25da85 AP_Compass: resolve compiler warnings 2018-02-10 08:54:34 +09:00
Andrew Tridgell 2c8e6bb834 AP_Compass: use generic defines for BMM150 2018-02-08 17:36:33 +11:00
Andrew Tridgell 57a3bc1397 AP_Compass: new compass learning system 
this learns compass offsets using magnetic tables and compass
observations
 2018-02-08 17:36:33 +11:00
Andrew Tridgell ca30f6aec8 AP_Compass: added per-motor compass calibration 
this allows for a motor calibration vector per motor
 2018-02-08 17:36:33 +11:00
Andrew Tridgell 2cc0f25ca0 AP_Compass: support PCNC1 2018-02-08 17:36:33 +11:00
Andrew Tridgell 0d8cdd2728 AP_Compass: fixed warning 2018-02-07 20:33:45 +11:00
Andrew Tridgell 23803df038 AP_Compass: allows boards to define orientation of HMC5843 2018-02-07 20:33:45 +11:00
Siddharth Purohit f0f4239d4a AP_Compass: skip using posix headers for non posix systems 2018-02-07 20:33:45 +11:00
LukeMike 432f6c2a4a VRBRAIN / APCompass: added compass sensor init for VR Brain boards 2018-02-05 08:26:49 +11:00
Andrew Tridgell 2067e25523 AP_Compass: make length filter in MAG3110 optional 
compile time for now, later can may become parameter
 2018-02-02 21:07:40 +11:00
night-ghost b6bf90ab93 AP_Compass: mAG3110 driver 2018-02-02 21:07:40 +11:00
Andrew Tridgell 20d75f52c2 AP_Compass: use calloc in preferance to malloc 2018-01-17 11:22:05 +11:00
Andrew Tridgell b741c6c29e AP_Compass: fixed build error on ChibiOS 2018-01-15 11:46:02 +11:00
Andrew Tridgell 8e87c30a33 AP_Compass: fixed MindPX-v2 compass orientations 2018-01-15 11:46:02 +11:00
Andrew Tridgell 36a141f9f1 AP_Compass: support MindPX-v2 2018-01-15 11:46:02 +11:00
Andrew Tridgell 743714de4c AP_Compass: support ChibiOS FMUv4 2018-01-15 11:46:02 +11:00
Andrew Tridgell 5d9fa7f85b AP_Compass: support ChibiOS 2018-01-15 11:46:02 +11:00
Randy Mackay 86cbc445bd AP_Compass: ICM20948 default rotation to Pitch180Yaw90 2018-01-12 08:16:41 +09:00
Andrew Tridgell f326377a5c AP_Compass: removed create() method for objects 
See discussion here:

  https://github.com/ArduPilot/ardupilot/issues/7331

we were getting some uninitialised variables. While it only showed up in
AP_SbusOut, it means we can't be sure it won't happen on other objects,
so safest to remove the approach

Thanks to assistance from Lucas, Peter and Francisco
 2017-12-14 08:12:28 +11:00
Mark Whitehorn b0e2f06a7a AP_Compass: add LIS3MDL probe for Pixracer 2017-12-08 09:49:25 +11:00
HeBin 26de6de848 AP_Compass: add Robsense PhenixPro Devkit Board support 2017-11-22 10:10:21 -08:00
Georgii Staroselskii 710594eee3 AP_Compass: enable compass on Edge 2017-10-20 13:03:08 -07:00
Andrew Tridgell 5646afac1c AP_Compass: avoid double detection of the AK09916 
with an ICM20948 we can double detect the compass due to the i2c pass-thru
 2017-10-04 11:49:06 +11:00
Lucas De Marchi 2fc6e52431 AP_Compass: use IST8310 and HMC5883 as external mags 2017-09-27 09:25:34 -07:00
Francisco Ferreira 6e286a2e66
AP_Compass: re-enable QMC5883 compass driver by default 
This reverts commit a657daf635
 2017-09-27 12:24:36 +01:00
Lucas De Marchi 69b6d95cb2 global: use static method to construct AP_Board_Config{,_CAN} 2017-09-26 03:01:21 +01:00
Lucas De Marchi c1a957fbf3 global: use static method to construct Compass 2017-09-26 03:01:21 +01:00
Lucas De Marchi 320260a151 AP_Compass: add static create method 2017-09-26 03:01:21 +01:00
Andrew Tridgell 678bd084b7 AP_Compass: added IST8310 on FMUv3 I2C 2017-09-23 08:07:18 +10:00
Rufus Wong 9491f7da55 AP_Compass: Add break to prevent fallthrough of PIXRACER to PIXHAWK_PRO 2017-09-18 19:57:22 +10:00
Lucas De Marchi b1740e2d9c AP_Compass: remove raspilot 2017-09-12 15:06:19 -07:00
Lucas De Marchi d5f57fdd93 AP_Compass: AK8963: remove fallback to timer thread 
Now that the bus thread from the AuxiliaryBus is implemented we can
remove the fallback.
 2017-09-11 09:52:41 -07:00
davidaroyer ad18e99bef AP_Compass: add support for Aerotenna OcPoC-Zynq hardware 2017-09-08 07:30:49 -07:00
Michael du Breuil fb77d0739e AP_Compass: Remove unused time calls, stash the time in the read loop 2017-09-07 19:53:14 +01:00
Mark Whitehorn 3642ecd9ef AP_COMPASS: fix errors in addition of alternate LIS3MDL I2C address 
testing shows ROTATION_YAW_90 is correct for mRo Neo M8N GPS/compass
 2017-08-10 19:46:26 +10:00
Mark Whitehorn a6e9baa8f6 AP_Compass: probe for LIS3MDL in mRo Neo-M8N GPS module 2017-08-10 19:46:26 +10:00
Francisco Ferreira 6cf8791eb5
AP_Compass: correct comment in LIS3MDL driver 
Commit 17f2393c1b decreased timer frequency but didn't change comment to match
 2017-08-04 19:56:26 +01:00
Lucas De Marchi 6bab28397a AP_Compass: remove user of timesliced logic 2017-08-02 08:00:53 -07:00
ljwang 5a7ec7d429 Delete write registers at start,using another way to repair 2017-08-02 16:15:14 +10:00
ljwang 648871a388 Fixed the QMC5883 identification,add check ID 2017-08-02 16:15:14 +10:00
Randy Mackay a657daf635 Compass: disable QMC5883 compass driver by default 
This driver causes occasional heading issues so disabling until these are resolved
 2017-07-25 09:27:29 +09:00
Kevin Lopez Alvarez df406c4389 AP_Compass : increase max possible offset 2017-07-24 13:48:20 +10:00
Kevin Lopez Alvarez 17f2393c1b AP_Compass: Decrease LIS3MDL ODR and timer 2017-07-24 13:48:20 +10:00
Kevin Lopez Alvarez 08b531e6a8 AP_Compass: LIS3MDL correct orientation 2017-07-24 13:48:20 +10:00
Kevin Lopez Alvarez cf8c1c2665 AP_Compass: Remove comments and use correct board number 2017-07-24 13:47:44 +10:00
Kevin Lopez Alvarez 1467daee2a AP_Compass: add ppro support 
disable lis3mdl for now
 2017-07-24 13:47:06 +10:00
Andrew Tridgell 732dc5984a AP_Compass: added COMPASS_TYPEMASK parameter 
this allows driver type to be disabled, to avoid probing them and
wasting CPU on sensors that are not being used

This also moves UAVCAN compass to be detected last, as discussed in the
dev call
 2017-07-19 15:53:22 +10:00
Peter Barker 6b53b5b5f3 AP_Compass: make handle_mag_cal_command return type stricter 2017-07-17 14:17:19 +01:00
ljwang 603e903ccd AP_Compass: QMC5883 Add internal i2c bus and fix rotation error 2017-07-12 12:56:59 +10:00
Eugene Shamaev aa1f6a7587 AP_Compass: united enumeration on startup, multiple CAN drivers, correct dev_id based on network and node ID 2017-07-03 11:44:32 +01:00
Miguel Arroyo ee328c9683 AP_Compass: move SITL Compass to standard sensor backend model 2017-06-29 09:22:08 +10:00
Andrew Tridgell f3d995a716 AP_Compass: improved robustness of BMM150 detection code 
cope with bus errors on startup
 2017-06-21 16:25:37 +10:00
Andrew Tridgell 68460144df AP_Compass: added retries on init in BMM150 2017-06-21 16:25:37 +10:00
Andrew Tridgell 9b093c4a33 AP_Compass: fixed a numerical issue in BMM150 driver 
we were getting the following:

  ret=-32768 z=5 rhall=6267 z1=23743 z2=712 z3=-1035 z4=0 xyz1=6264 dividend=163840 dividend2=-1073577207 divisor=5253

the signed/unsigned casts for rhall and xyz1 did not produce the
desired result
 2017-06-21 16:25:37 +10:00
Andrew Tridgell 0623db98d6 AP_Compass: cope with bus errors in BMM150 
if we have bus errors the BMM150 can get confused, giving rubbish
output. This uses the checked register code to reset, and a full soft
reset after 250ms of no samples.
 2017-06-21 16:25:37 +10:00