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4419 Commits

Author SHA1 Message Date
Les Newell
114c0ac561 OP-984 Added multiple banks code to stabilization.c 2013-12-11 17:08:18 +00:00
Les Newell
ec713be3ea OP-984 Added data UAV object for current stabilization bank 2013-12-11 17:08:10 +00:00
Alessio Morale
44269b6762 OP-1139: export corrected pressure value to uavobject 2013-12-10 02:02:30 +01:00
Alessio Morale
634ba79dcb OP-1141: allow to input a barometer bias model. 
It uses a 3rd degree polynomial to model pressure bias as a function of temperature.
 2013-12-10 01:46:28 +01:00
Alessio Morale
13b45b2b78 OP.1139: uncrustify 2013-12-10 01:44:13 +01:00
Alessio Morale
75842cb648 OP-1139: perform second order low temperature compensation. 
It follows the procedure described in MS5611 datasheet(http://www.meas-spec.com/downloads/MS5611-01BA03.pdf, page 8)
to perform low(20°) and very low(-15°C) temperature compensation.
 2013-12-10 01:21:05 +01:00
Philippe Renon
617924e64d Merge remote-tracking branch 'origin/next' into filnet/OP-1122_gcs_waypoint_editor_stabilization 
Conflicts:
	flight/uavobjects/uavobjectmanager.c
	ground/openpilotgcs/src/plugins/uavtalk/telemetrymanager.cpp
	ground/openpilotgcs/src/plugins/uavtalk/uavtalk.pro
	shared/uavobjectdefinition/pathaction.xml
	shared/uavobjectdefinition/waypoint.xml
 2013-12-08 14:58:01 +01:00
Philippe Renon
95b5f38556 OP-1122 OP-1125 flight side UAVObjectManager was wrongly emitting EV_UPDATED_MANUAL events when new uavobject instances were created. Now properly emits EV_UPDATED. 2013-12-08 14:34:11 +01:00
Corvus Corax
95d52c6b08 fixed signs in control loop 2013-12-08 14:00:18 +01:00
Corvus Corax
84af4b7651 fixes to barofilter 2013-12-08 14:00:09 +01:00
Corvus Corax
66b0ffd682 small fix to baro state filter - more init cycles 2013-12-08 13:35:00 +01:00
Corvus Corax
5cc8dedadf uncrustify changed things 2013-12-08 13:07:26 +01:00
Corvus Corax
3cea14a809 added missing object, added more debug output 2013-12-08 13:06:28 +01:00
Corvus Corax
4ad0e730da added status uavobject for easier debugging 2013-12-08 12:23:16 +01:00
Corvus Corax
90f689cfa1 throttle does not accelerate downwards but upwards - switched sign 2013-12-08 10:44:17 +01:00
Corvus Corax
981fc4321d removed requirement for non existing task 2013-12-08 10:32:24 +01:00
Corvus Corax
8832ea24f5 proper uncrustification 2013-12-07 23:31:26 +01:00
Corvus Corax
623c25aa99 new design of altitude hold - warning not tested yet! 2013-12-07 23:16:22 +01:00
Corvus Corax
a4d53c18ac got rid of altholdsmoothed uavobject 2013-12-07 20:14:02 +01:00
Corvus Corax
ff5927bc43 some changes to altitudehold, hope i get that done today... 2013-12-07 17:28:01 +01:00
Corvus Corax
3e1b0fd114 Merge branch 'next' into corvuscorax/OP-1022_AH_improvements_amorale 2013-12-07 16:33:57 +01:00
Philippe Renon
4f9231e247 OP-1122 OP-1125 fixed regression in flight side uavtalk introduced in a recent commit 2013-12-04 20:54:07 +01:00
Philippe Renon
ab89d6a491 OP-1122 OP-1125 fixed defect raised in OPReview-593 : two occurences of connection->respObj clearing were removed when they should not have been removed 2013-12-01 21:44:14 +01:00
Philippe Renon
0dc334adea OP-1122 OP-1133 exposed send/request all instances of multi instance uav objects and made related uavtalk fixes 2013-12-01 19:25:44 +01:00
Corvus Corax
9c6abef89b fixed enabled and disabled messages for logging in all cases 2013-12-01 00:03:24 +01:00
Philippe Renon
390c88b92a OP-1122 OP-1125 uavtalk - object request messages are now acked only by object messages and acked object messages are acked only by ack messages 2013-11-29 02:51:46 +01:00
Philippe Renon
15c4392ed5 OP-1122 OP-1125 uavtalk - more OPReview-593 related cleanups 2013-11-29 01:21:45 +01:00
Philippe Renon
50a0a4f512 OP-1122 OP-1125 uavtalk - minor OPReview-593 related cleanups 2013-11-28 23:42:08 +01:00
Philippe Renon
2f0974fda9 OP-1122 OP-1125 uavtalk - fixed a number of issues concerning acked multi instance messages : 
- all messages now systematically include an instance ID (fixes parsing of messages containing unknown object)
- added missing NACK of object request on fight side
- added more logging and warnings
- misc fixes and cleanups
this commit affects both the firmware and GCS (need to flash new version of firmware)
 2013-11-28 01:14:29 +01:00
Corvus Corax
25fd3d5740 Just uncrustification 2013-11-26 00:43:02 +01:00
Fredrik Arvidsson
2fc34910e0 OP-1119 Fix in pios function for debuglogging uavo. 2013-11-26 00:36:59 +01:00
Corvus Corax
be9faabe92 Merge branch 'next' into corvuscorax/onboardlogging 2013-11-26 00:34:01 +01:00
Alessio Morale
bacc4d3d79 Merge branch 'master' into next 
Conflicts:
	flight/targets/boards/oplinkmini/firmware/pios_board.c
	ground/openpilotgcs/copydata.pro
 2013-11-25 01:12:10 +01:00
Corvus Corax
1c83d3ee28 BUGFIX to OpLinkMini: oplinkmod needs to initialize the Callback Scheduler 
OPLMini does not use Systemmod but its own system module called
oplinkmod - which did not initialize the callback scheduler. Making the
event dispatcher a callback caused it to no longer run due to the
missing callback scheduler initialization
 2013-11-24 21:24:55 +01:00
Corvus Corax
18ad56d4ed removed identical files from pios/posix (use files from common instead) 2013-11-24 15:40:32 +01:00
Corvus Corax
89afbde58a initialized log packages with 0xff instead of 0x0 to reduce flash wear 2013-11-24 15:36:26 +01:00
Corvus Corax
32b5ff22cf cleanup defect in OP-Review-586 2013-11-24 15:27:33 +01:00
Philippe Renon
1469277f96 OP-1122 OP-1125 removed dead code from fw uavtalk (first fw commit ;) 2013-11-23 14:59:24 +01:00
Corvus Corax
77b7ba3089 Added new setting 'OnlyWhenArmed' to debuglogsettings 2013-11-19 19:29:24 +01:00
Corvus Corax
d235a24e23 Merge branch 'next' into corvuscorax/onboardlogging 2013-11-19 18:49:58 +01:00
Corvus Corax
7a6c0b61e8 Merge branch 'next' into corvuscorax/callbackeventdispatcher2 2013-11-19 18:36:20 +01:00
Corvus Corax
9414f3513f adapted telemetry stack sizes for flight firmware to include more space needed for logging feature 2013-11-17 22:39:39 +01:00
Corvus Corax
951c7bfea0 removed redundant code from Telemetry 2013-11-17 22:20:19 +01:00
Corvus Corax
0e502d3734 Modified queue creation for telemetry and logging 
event queues are now created for all uavobjects for both telemetry and
logging, so later modifications from manual to periodic are possible
 2013-11-17 22:10:03 +01:00
Corvus Corax
c6031ed963 fixed usr flash system definition 2013-11-17 21:03:08 +01:00
Corvus Corax
c7431623af changed hardware definition for revolution to have usr space in just one arena 
(no flash garbage collection since used primarily for logging where there are no deletes)
 2013-11-17 20:43:53 +01:00
Corvus Corax
fcc479f5cb more intelligent log interfacing, including flash formatting option 2013-11-17 20:14:50 +01:00
Corvus Corax
3d8625abaf Enabled logging on revolution (added module and uavobjects) 2013-11-17 18:50:51 +01:00
Corvus Corax
9dbac5d060 Enabled printf-stdarg on all targets, implemented vsnprintf() (needed for logging) 2013-11-17 18:49:50 +01:00
Corvus Corax
6031200aea Some fixes in debuglog to compile and run on all firmware platforms 2013-11-17 18:04:47 +01:00
Corvus Corax
243e261411 UAVObject logging through telemetry module and uavobjectmanager 2013-11-17 17:15:23 +01:00
Corvus Corax
d9a9536b61 modified uavobjectmanager to have accessor functions for the new flags 2013-11-17 14:53:08 +01:00
Corvus Corax
354ca88cd6 Updated UAVObject metadata to include correct flags needed for on board logging 2013-11-17 14:00:42 +01:00
Corvus Corax
a0746d87fa Logging facility: logs debug data to logfs and exports it through container UAVObject 2013-11-17 02:54:26 +01:00
Corvus Corax
adfbdfae38 Make use of (now supported) standard snprintf in stdarg-printf when used in logfs 2013-11-17 02:49:53 +01:00
Corvus Corax
320bbcf434 Made printf-stdarg check maximum string length limit (supports snprintf now) 2013-11-17 02:47:58 +01:00
Corvus Corax
314d526e94 corrected instance id encoding in filename to not conflict with metadata uavobject ids 2013-11-16 18:55:54 +01:00
Corvus Corax
00321b09dc Modified uavobjectmanager to only use logfs calls for UAVObject flash transactions, abstracted dosfs calls to use logfs wrapper class for simpiosix and SD-card access 2013-11-16 17:30:40 +01:00
Alessio Morale
b003109eea OP-1104: Update BL to version 6, raise to 0xA0000 so 640Kbyte program size. 
+review OPReview
 #resolve
 2013-11-05 19:07:36 +01:00
Corvus Corax
b3ebb91ceb uncrustification 2013-10-19 21:59:07 +02:00
Corvus Corax
86aa993d24 changed port increment tick function for new freertos 2013-10-18 23:07:23 +02:00
mathieu
fb1f58c94b Merge branch 'next' into Mathieu/OP-1079_Update_to_FreeRTOS_v7_5_2 2013-09-11 18:57:37 -07:00
Alessio Morale
c0cfd3dffe Merge branch 'amorale/OP-1058_uavo_named_accessors' into next 2013-09-10 21:20:12 +02:00
Alessio Morale
db7ea48675 Merge remote-tracking branch 'origin/cyr/OP-1076' into next 2013-09-10 20:26:53 +02:00
Mathieu Rondonneau
03b243fe31 OP-1079 - Update to FreeRTOS v7.5.2 2013-09-04 20:26:23 -07:00
Alessio Morale
0db9a9bf8d OP-1058 Add xxxGet and xxxSet functions to handle multielement fields as struct 
for example:
EKFStateVariancePSet(EKFStateVariancePData *NewP);
EKFStateVariancePGet(EKFStateVariancePData *NewP);
Also in this case array accessors are renamed as xxxArrayGet/Set:
EKFStateVariancePArraySet(float *NewP);
EKFStateVariancePArrayGet(float *NewP);

Nothing changes for anonymous items as default functions continues to deal with arrays

+review OPReview-552
 2013-09-01 13:23:20 +02:00
Alessio Morale
e91bc28667 OP-1058 Get rid of Unions. 
They caused stack usage increase with -fstrict-aliasing as stack slots are not reused when dealing with unions.
It has now been added the cast_struct_to_array macro in pios_struct_helper.h to handle such case where it is useful to access those homogeneous structs as arrays

+review OPReview-552
 2013-09-01 12:10:55 +02:00
Alessio Morale
11b269f898 Merge remote-tracking branch 'origin/next' into amorale/OP-1058_uavo_named_accessors 2013-08-31 16:03:30 +02:00
Mathieu Rondonneau
e973740b8b OP-1067 run uncrustify 2013-08-28 19:47:44 -07:00
Mathieu Rondonneau
fc6d544476 OP-1067 Force oplonk to report disabled if rfm22b is not initialized. 2013-08-28 19:45:50 -07:00
Erik Gustavsson
e39c3f897e Use xTaskGetTickCount() to time long intervals rather than PIOS_DELAY_GetRaw(), because of wrap-around issues. 2013-08-26 19:14:47 +02:00
David
1a27b473d5 New CDC driver revsion 2013-08-17 04:04:22 +10:00
Corvus Corax
0db395b4a2 uncrustify 2013-08-11 15:33:59 +02:00
Corvus Corax
0f31368c64 Merge branch 'corvuscorax/OP-1036_fixed-wing-improvements' into next 2013-08-11 15:13:23 +02:00
Corvus Corax
0724fca32a refactored pid_apply_scaled back into pid_apply (rename only) 2013-08-11 15:12:17 +02:00
Mathieu Rondonneau
114e353acb OP-1067 Invalid value for "LinkState" 
Do not retrieve status from rfm22b if not initialized.
 2013-08-09 20:14:13 -07:00
Mathieu Rondonneau
40b0682048 OP-667: This is not an issue since the 2 callers already check for NULL pointer but for consistency, this should be done in the function itself. 2013-08-03 09:39:44 -07:00
Brian Webb
5ac1f33c47 Adds missing pios_gpio_priv.h 2013-08-02 22:01:44 -07:00
Brian Webb
831aa2e213 Merge remote-tracking branch 'origin/next' into brian/GPIO_update 2013-08-02 17:45:06 -07:00
Alessio Morale
99dbecdd7d Merge remote-tracking branch 'origin/brian/OP-1050_Fix_OPLink_Erase_Settings' into rel-13.06.03 2013-08-01 21:28:37 +02:00
Alessio Morale
8dd3c45ccf OP-1058 change some missing occurrencies to .field.XXX notation 
+review OPReview-552
 2013-08-01 11:44:12 +02:00
Alessio Morale
01d963affd OP-1058 uncrustify 2013-08-01 01:28:50 +02:00
Alessio Morale
f226b23c24 OP-1058: fix needed for fw_osd code compilation 2013-08-01 01:19:02 +02:00
Alessio Morale
8351e97faa OP-1058: fix needed for fw_revoproto code compilation 2013-08-01 01:18:53 +02:00
Alessio Morale
df90a13558 OP-1058: fix needed for fw_coptercontrol code compilation 2013-08-01 01:18:26 +02:00
Alessio Morale
9e1acc3165 OP-1058: fix needed for fw_revolution code compilation 2013-07-31 15:24:26 +02:00
Alessio Morale
d99790be71 OP-1058: Implement explicit item accessor for MultiElement fields. 
This implementation uses a union containing the Array implementing the MultiElement field data and a struct made from element names.
it allow to replace the following sintax:
  settings.PitchRatePID[STABILIZATIONSETTINGS_PITCHRATEPID_KP]
with a more concise and less error prone
  settings.PitchRatePID.fields.Kp
while allowing the direct array access using the notation
  settings.PitchRatePID.data[n]
 2013-07-31 15:23:43 +02:00
Oleg Semyonov
77a6db3007 Merge remote-tracking branch 'origin/os/baro-offset-lpf' into next 2013-07-30 23:41:37 +02:00
Alessio Morale
b4d2423680 OP-1048 fix CF stateestimation bug using AccelTau. 
move *_filtered to stateestimator data struct and initialize them at init.
they were previously used uninitialized thus causing estimation to fail validations, restarting the filter continously

+review OPReview
 2013-07-30 23:41:21 +02:00
Corvus Corax
5206c1f195 uncrustification 2013-07-30 22:14:36 +02:00
Brian Webb
2340f4f0d9 OP-1050: Moves LED configuration above settings erase in OPLink pios_board.c to prevent crashing when settings are erased. 2013-07-29 20:37:00 -07:00
Corvus Corax
4d9f7a72db Start CallbackScheduler last (after other modules) to reduce risk of race conditions during bootup 2013-07-28 20:31:31 +02:00
Corvus Corax
9537cac701 Merge branch 'next' into corvuscorax/callbackeventdispatcher2 2013-07-28 17:10:20 +02:00
Brian Webb
e246ecf536 Moves pios_led functionality to pios_gpio and makes pios_led a thin layer over pios_gpio. Supports configuring multiple sets of GPIOs. 2013-07-28 07:01:08 -07:00
Richard Flay (Hyper)
c3e3521001 OP-1049: Hotfix to 13.06.02 for MPU6000 FIFO overflow on CC3D when board initialisation takes 
longer than 150ms.
 2013-07-28 01:16:22 +09:30
Oleg Semyonov
1bfa66c2b6 Change settings for baro altitude offset correction 2013-07-26 21:14:44 +02:00
Corvus Corax
ae1db5058e uncrustification 2013-07-20 16:59:00 +02:00
Corvus Corax
4f6c3c98e3 some small fixes to airspeed compensation in Stabilization 2013-07-20 14:52:22 +02:00
Corvus Corax
2ecbf4a846 add code to scale stabilization PID coefficients by 1/airspeed^2 if the user wishes to do so 2013-07-20 13:52:45 +02:00
Corvus Corax
b3cbb57a2b made low pass filter alpha a setting 2013-07-20 10:40:29 +02:00
Corvus Corax
1049f483a5 added low pass filter and a few safety checks to gps airspeed estimation 2013-07-20 09:09:44 +02:00
Corvus Corax
72e33a11e4 uncrustification, changed ekf glitch recognition to warning, since its now benign 2013-07-19 15:40:57 +02:00
Corvus Corax
b9ae8844a1 return error if ekf has not inited to prevent arming without proper state estimation 2013-07-19 15:37:50 +02:00
Corvus Corax
be583dd8bf fixes to gps airspeed sensor 2013-07-19 15:30:33 +02:00
Corvus Corax
842b4e361b moved airspeed sensor code to correct location 2013-07-19 15:29:04 +02:00
Alessio Morale
6b27ff1e27 OP-1022 add position lowpass, rework setting uavo, cleanup 2013-07-19 11:28:48 +00:00
Alessio Morale
e2a7c6cb25 OP-1022 Reset altitude and velocity when stick goes to deadband 2013-07-19 07:57:24 +00:00
Oleg Semyonov
aa560653d4 Make baro altitude offset (relative to GPS alt) filter configurable 2013-07-19 09:53:44 +03:00
Corvus Corax
ea8373b0f7 re-enabled wind estimation absed on groundspeed 2013-07-18 20:01:02 +02:00
Corvus Corax
2ab92f09a5 fix for the fix 2013-07-18 14:15:23 +02:00
Corvus Corax
9ba1fbdccc fixed safety check for throttle low, needed for arming on switch, too, but not for disarming 2013-07-18 14:10:33 +02:00
Corvus Corax
7b5bf53200 fixed channel reversals 2013-07-18 13:46:58 +02:00
Corvus Corax
50561bfb5f made arming/disarming sequence time configurable - useful for heli pilots that like almost-instant disarm 2013-07-18 13:13:23 +02:00
Corvus Corax
114e25ff5d cleaned up code for armin/disarming and got rid of a bunch of assumptions 2013-07-18 13:05:37 +02:00
Corvus Corax
658b2fc804 cherry-pick of Sambas Arm-On-A-Switch capability implementation 2013-07-18 10:45:36 +02:00
Corvus Corax
6c88184b32 Merge branch 'corvuscorax/OP-1036_fixed-wing-improvements' into next 2013-07-18 09:46:23 +02:00
Corvus Corax
bffe119214 made safety checks in fixed wing path follower configurable 2013-07-17 14:50:23 +02:00
Alessio Morale
005a68826d OP-1022 Converted to a plain Altitude PID + Velocity PI implementation 2013-07-17 08:38:44 +00:00
Alessio Morale
8c70e64544 OP-1022 reset velocity when changing flight mode 2013-07-17 08:37:56 +00:00
Werner Backes
45cebda628 Add a configurable lowpass filter to smooth throttle commands in 
AltitudeHold mode.

Conflicts:
	flight/modules/AltitudeHold/altitudehold.c
	shared/uavobjectdefinition/altitudeholdsettings.xml
 2013-07-16 21:21:21 +00:00
Werner Backes
7708aab313 Added vertical velocity as a control loop input to improve dynamics during 
commanded ascend/decent.

Conflicts:
	flight/modules/AltitudeHold/altitudehold.c
	flight/modules/ManualControl/manualcontrol.c
	shared/uavobjectdefinition/altitudeholdsettings.xml
 2013-07-16 21:17:32 +00:00
Alessio Morale
ed233efde2 OP-1022 Uncrustify 2013-07-16 20:02:03 +00:00
Alessio Morale
0203e2c6e2 OP-1022 Adding a proportional term on the square of the altitude error. 2013-07-16 20:01:16 +00:00
Alessio Morale
5b4d46819e OP-1022 Fix problem with EventSystem due to too high update rate 2013-07-16 12:25:58 +00:00
Alessio Morale
e975e4d9b7 OP-1022: replace old KF in alitude hold with status from filters 2013-07-16 12:25:57 +00:00
Alessio Morale
a57f8913ba OP-1022: replace old KF in alitude hold with status from filters 2013-07-16 12:25:57 +00:00
Alessio Morale
133ad414f8 OP-1022: Added a velocity loop in AH module, used when throttle is not in central position. 2013-07-16 12:25:57 +00:00
Werner Backes
23b5b37480 Scale down initial throttle when AH is engaged based on roll/pitch angle. 
This improves AH behaviour when switching to AH while being in fast
forward flight.
 2013-07-16 12:25:57 +00:00
Werner Backes
513d509865 Initialize altitude before switching to "running". Not doing this could 
cause glitches during the very first switch to AH.
 2013-07-16 12:25:57 +00:00
Werner Backes
1da68cda9a Scale up desired throttle in AH mode to compensate for roll/pitch 2013-07-16 12:25:57 +00:00
Werner Backes
73aa4df431 Missing " 2013-07-16 12:25:57 +00:00
Werner Backes
723f308ac7 Removed obsolete (unused) code 2013-07-16 12:25:57 +00:00
Werner Backes
45ed66414f Changed AH to work with absolute instead of relative altitude 2013-07-16 12:25:56 +00:00
Werner Backes
aecc8543a5 Corrected throttle stick exponentional function in AH mode 2013-07-16 12:25:56 +00:00
Alessio Morale
11bc7804d0 Merge branch 'amorale/OP-994_adc_cleanup' into next 2013-07-16 12:23:25 +00:00
Corvus Corax
81e691f2d6 fixed stack size for manualcontrol, fixed acking behaviour for waypoints 2013-07-16 10:12:16 +02:00
Alessio Morale
104bae01e8 OP-994 Exclude alarm for estimated flight time if Capacity setting is 0 
+review OPReview-506
 2013-07-15 20:35:26 +00:00
Corvus Corax
8b6510da4f Made AltitudeOffset for ReturnToHome configurable, Made Failsafe-FlightMode configurable. 2013-07-15 09:14:09 +02:00
Alessio Morale
402c84c003 OP-994 Added zero calibration settings 
+review OPReview-506
 2013-07-14 20:26:07 +00:00
Corvus Corax
4d28052dd8 update configuration check prior to arming control, just in case. Allthough the configuration didn't change, other parameters like the list of running tasks can, which alters the alarms. 2013-07-14 06:20:22 +02:00
Corvus Corax
f3a96e5620 Bugfixed in fixed wing path follower, high wind situation now succesfully detected 2013-07-11 16:22:24 +02:00
Corvus Corax
0ffb2dee02 bugfix in pathplanner - 3d distance not calculated correctly 2013-07-11 14:35:37 +02:00
Corvus Corax
c1f32e9beb OP-1036: rename some settings and move them in the right place 
tags: de-kenzification
 2013-07-10 15:55:12 +02:00
Corvus Corax
27eadc200b Merge branch 'corvuscorax/lla2nedfilter' into next 
Conflicts:
	flight/modules/StateEstimation/stateestimation.c
 2013-07-10 14:38:12 +02:00
Corvus Corax
551780c74b Merge branch 'corvuscorax/complementary_altitude_filter' into next 
Conflicts:
	flight/targets/boards/revolution/firmware/UAVObjects.inc
 2013-07-10 14:27:25 +02:00
Brian Webb
c2df59498b Merge remote-tracking branch 'origin/master' into next 2013-07-06 07:08:30 -07:00
Brian Webb
0d02df4d02 Uncrustified OPLink code. 2013-07-05 18:49:26 -07:00
Brian Webb
6dbecca7a5 OP-932 Fixes erasing settings on OPLink and blocks OPLinkSettings objects from being transmitted over the radio. 2013-07-05 18:25:52 -07:00
Brian Webb
d0d8a0aadd OP-932 Adds PWM outputs to OPLinkMini. Both gpio pins on the main and/or flexi port can be configured to output PWM for a total of up to 4 PWM outputs. 2013-07-03 18:58:34 -07:00
Corvus Corax
0107432e45 Added a low pass filter for accels to the altitude filter 2013-07-02 23:17:08 +02:00