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609 lines
20 KiB
C
609 lines
20 KiB
C
/**
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******************************************************************************
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* @addtogroup OpenPilotModules OpenPilot Modules
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* @{
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* @addtogroup State Estimation
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* @brief Acquires sensor data and computes state estimate
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* @{
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*
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* @file stateestimation.c
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* @author The OpenPilot Team, http://www.openpilot.org Copyright (C) 2013.
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* @brief Module to handle all comms to the AHRS on a periodic basis.
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*
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* @see The GNU Public License (GPL) Version 3
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*
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******************************************************************************/
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "inc/stateestimation.h"
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#include <callbackinfo.h>
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#include <gyrosensor.h>
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#include <accelsensor.h>
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#include <magsensor.h>
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#include <barosensor.h>
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#include <airspeedsensor.h>
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#include <gpspositionsensor.h>
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#include <gpsvelocitysensor.h>
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#include <homelocation.h>
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#include <auxmagsensor.h>
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#include <gyrostate.h>
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#include <accelstate.h>
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#include <magstate.h>
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#include <airspeedstate.h>
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#include <attitudestate.h>
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#include <positionstate.h>
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#include <velocitystate.h>
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#include "revosettings.h"
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#include "flightstatus.h"
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#include "CoordinateConversions.h"
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// Private constants
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#define STACK_SIZE_BYTES 256
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#define CALLBACK_PRIORITY CALLBACK_PRIORITY_REGULAR
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#define TASK_PRIORITY CALLBACK_TASK_FLIGHTCONTROL
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#define TIMEOUT_MS 10
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// Private filter init const
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#define FILTER_INIT_FORCE -1
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#define FILTER_INIT_IF_POSSIBLE -2
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// local macros, ONLY to be used in the middle of StateEstimationCb in section RUNSTATE_LOAD after the update of states updated!
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#define FETCH_SENSOR_FROM_UAVOBJECT_CHECK_AND_LOAD_TO_STATE_3_DIMENSIONS(sensorname, shortname, a1, a2, a3) \
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if (IS_SET(states.updated, SENSORUPDATES_##shortname)) { \
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sensorname##Data s; \
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sensorname##Get(&s); \
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if (IS_REAL(s.a1) && IS_REAL(s.a2) && IS_REAL(s.a3)) { \
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states.shortname[0] = s.a1; \
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states.shortname[1] = s.a2; \
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states.shortname[2] = s.a3; \
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} \
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else { \
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UNSET_MASK(states.updated, SENSORUPDATES_##shortname); \
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} \
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}
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#define FETCH_SENSOR_FROM_UAVOBJECT_CHECK_AND_LOAD_TO_STATE_1_DIMENSION_WITH_CUSTOM_EXTRA_CHECK(sensorname, shortname, a1, EXTRACHECK) \
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if (IS_SET(states.updated, SENSORUPDATES_##shortname)) { \
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sensorname##Data s; \
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sensorname##Get(&s); \
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if (IS_REAL(s.a1) && EXTRACHECK) { \
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states.shortname[0] = s.a1; \
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} \
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else { \
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UNSET_MASK(states.updated, SENSORUPDATES_##shortname); \
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} \
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}
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#define FETCH_SENSOR_FROM_UAVOBJECT_CHECK_AND_LOAD_TO_STATE_2_DIMENSION_WITH_CUSTOM_EXTRA_CHECK(sensorname, shortname, a1, a2, EXTRACHECK) \
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if (IS_SET(states.updated, SENSORUPDATES_##shortname)) { \
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sensorname##Data s; \
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sensorname##Get(&s); \
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if (IS_REAL(s.a1) && IS_REAL(s.a2) && EXTRACHECK) { \
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states.shortname[0] = s.a1; \
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states.shortname[1] = s.a2; \
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} \
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else { \
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UNSET_MASK(states.updated, SENSORUPDATES_##shortname); \
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} \
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}
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// local macros, ONLY to be used in the middle of StateEstimationCb in section RUNSTATE_SAVE before the check of alarms!
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#define EXPORT_STATE_TO_UAVOBJECT_IF_UPDATED_3_DIMENSIONS(statename, shortname, a1, a2, a3) \
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if (IS_SET(states.updated, SENSORUPDATES_##shortname)) { \
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statename##Data s; \
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statename##Get(&s); \
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s.a1 = states.shortname[0]; \
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s.a2 = states.shortname[1]; \
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s.a3 = states.shortname[2]; \
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statename##Set(&s); \
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}
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#define EXPORT_STATE_TO_UAVOBJECT_IF_UPDATED_2_DIMENSIONS(statename, shortname, a1, a2) \
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if (IS_SET(states.updated, SENSORUPDATES_##shortname)) { \
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statename##Data s; \
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statename##Get(&s); \
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s.a1 = states.shortname[0]; \
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s.a2 = states.shortname[1]; \
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statename##Set(&s); \
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}
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// Private types
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struct filterPipelineStruct;
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typedef const struct filterPipelineStruct {
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const stateFilter *filter;
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const struct filterPipelineStruct *next;
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} filterPipeline;
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// Private variables
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static DelayedCallbackInfo *stateEstimationCallback;
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static volatile RevoSettingsData revoSettings;
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static volatile sensorUpdates updatedSensors;
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static volatile int32_t fusionAlgorithm = -1;
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static const filterPipeline *filterChain = NULL;
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// different filters available to state estimation
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static stateFilter magFilter;
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static stateFilter baroFilter;
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static stateFilter baroiFilter;
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static stateFilter velocityFilter;
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static stateFilter altitudeFilter;
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static stateFilter airFilter;
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static stateFilter stationaryFilter;
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static stateFilter llaFilter;
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static stateFilter cfFilter;
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static stateFilter cfmFilter;
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static stateFilter ekf13iFilter;
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static stateFilter ekf13Filter;
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// this is a hack to provide a computational shortcut for faster gyro state progression
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static float gyroRaw[3];
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static float gyroDelta[3];
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// preconfigured filter chains selectable via revoSettings.FusionAlgorithm
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static const filterPipeline *cfQueue = &(filterPipeline) {
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.filter = &airFilter,
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.next = &(filterPipeline) {
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.filter = &baroiFilter,
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.next = &(filterPipeline) {
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.filter = &altitudeFilter,
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.next = &(filterPipeline) {
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.filter = &cfFilter,
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.next = NULL,
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}
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}
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}
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};
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static const filterPipeline *cfmiQueue = &(filterPipeline) {
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.filter = &magFilter,
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.next = &(filterPipeline) {
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.filter = &airFilter,
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.next = &(filterPipeline) {
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.filter = &baroiFilter,
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.next = &(filterPipeline) {
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.filter = &altitudeFilter,
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.next = &(filterPipeline) {
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.filter = &cfmFilter,
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.next = NULL,
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}
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}
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}
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}
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};
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static const filterPipeline *cfmQueue = &(filterPipeline) {
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.filter = &magFilter,
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.next = &(filterPipeline) {
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.filter = &airFilter,
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.next = &(filterPipeline) {
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.filter = &llaFilter,
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.next = &(filterPipeline) {
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.filter = &baroFilter,
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.next = &(filterPipeline) {
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.filter = &altitudeFilter,
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.next = &(filterPipeline) {
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.filter = &cfmFilter,
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.next = NULL,
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}
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}
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}
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}
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}
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};
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static const filterPipeline *ekf13iQueue = &(filterPipeline) {
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.filter = &magFilter,
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.next = &(filterPipeline) {
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.filter = &airFilter,
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.next = &(filterPipeline) {
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.filter = &baroiFilter,
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.next = &(filterPipeline) {
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.filter = &stationaryFilter,
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.next = &(filterPipeline) {
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.filter = &ekf13iFilter,
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.next = &(filterPipeline) {
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.filter = &velocityFilter,
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.next = NULL,
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}
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}
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}
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}
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}
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};
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static const filterPipeline *ekf13Queue = &(filterPipeline) {
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.filter = &magFilter,
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.next = &(filterPipeline) {
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.filter = &airFilter,
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.next = &(filterPipeline) {
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.filter = &llaFilter,
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.next = &(filterPipeline) {
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.filter = &baroFilter,
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.next = &(filterPipeline) {
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.filter = &ekf13Filter,
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.next = &(filterPipeline) {
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.filter = &velocityFilter,
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.next = NULL,
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}
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}
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}
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}
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}
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};
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// Private functions
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static void settingsUpdatedCb(UAVObjEvent *objEv);
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static void sensorUpdatedCb(UAVObjEvent *objEv);
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static void homeLocationUpdatedCb(UAVObjEvent *objEv);
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static void StateEstimationCb(void);
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static inline int32_t maxint32_t(int32_t a, int32_t b)
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{
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if (a > b) {
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return a;
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}
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return b;
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}
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/**
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* Initialise the module. Called before the start function
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* \returns 0 on success or -1 if initialisation failed
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*/
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int32_t StateEstimationInitialize(void)
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{
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RevoSettingsInitialize();
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GyroSensorInitialize();
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MagSensorInitialize();
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AuxMagSensorInitialize();
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BaroSensorInitialize();
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AirspeedSensorInitialize();
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GPSVelocitySensorInitialize();
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GPSPositionSensorInitialize();
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HomeLocationInitialize();
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GyroStateInitialize();
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AccelStateInitialize();
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MagStateInitialize();
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AirspeedStateInitialize();
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PositionStateInitialize();
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VelocityStateInitialize();
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RevoSettingsConnectCallback(&settingsUpdatedCb);
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HomeLocationConnectCallback(&homeLocationUpdatedCb);
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GyroSensorConnectCallback(&sensorUpdatedCb);
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AccelSensorConnectCallback(&sensorUpdatedCb);
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MagSensorConnectCallback(&sensorUpdatedCb);
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BaroSensorConnectCallback(&sensorUpdatedCb);
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AirspeedSensorConnectCallback(&sensorUpdatedCb);
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AuxMagSensorConnectCallback(&sensorUpdatedCb);
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GPSVelocitySensorConnectCallback(&sensorUpdatedCb);
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GPSPositionSensorConnectCallback(&sensorUpdatedCb);
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uint32_t stack_required = STACK_SIZE_BYTES;
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// Initialize Filters
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stack_required = maxint32_t(stack_required, filterMagInitialize(&magFilter));
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stack_required = maxint32_t(stack_required, filterBaroiInitialize(&baroiFilter));
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stack_required = maxint32_t(stack_required, filterBaroInitialize(&baroFilter));
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stack_required = maxint32_t(stack_required, filterVelocityInitialize(&velocityFilter));
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stack_required = maxint32_t(stack_required, filterAltitudeInitialize(&altitudeFilter));
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stack_required = maxint32_t(stack_required, filterAirInitialize(&airFilter));
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stack_required = maxint32_t(stack_required, filterStationaryInitialize(&stationaryFilter));
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stack_required = maxint32_t(stack_required, filterLLAInitialize(&llaFilter));
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stack_required = maxint32_t(stack_required, filterCFInitialize(&cfFilter));
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stack_required = maxint32_t(stack_required, filterCFMInitialize(&cfmFilter));
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stack_required = maxint32_t(stack_required, filterEKF13iInitialize(&ekf13iFilter));
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stack_required = maxint32_t(stack_required, filterEKF13Initialize(&ekf13Filter));
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stateEstimationCallback = PIOS_CALLBACKSCHEDULER_Create(&StateEstimationCb, CALLBACK_PRIORITY, TASK_PRIORITY, CALLBACKINFO_RUNNING_STATEESTIMATION, stack_required);
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return 0;
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}
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/**
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* Start the task. Expects all objects to be initialized by this point.
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* \returns 0 on success or -1 if initialisation failed
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*/
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int32_t StateEstimationStart(void)
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{
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RevoSettingsConnectCallback(&settingsUpdatedCb);
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// Force settings update to make sure rotation loaded
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settingsUpdatedCb(NULL);
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return 0;
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}
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MODULE_INITCALL(StateEstimationInitialize, StateEstimationStart);
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/**
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* Module callback
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*/
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static void StateEstimationCb(void)
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{
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static filterResult alarm = FILTERRESULT_OK;
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static filterResult lastAlarm = FILTERRESULT_UNINITIALISED;
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static uint16_t alarmcounter = 0;
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static const filterPipeline *current;
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static stateEstimation states;
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static uint32_t last_time;
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static uint16_t bootDelay = 64;
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// after system startup, first few sensor readings might be messed up, delay until everything has settled
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if (bootDelay) {
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bootDelay--;
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PIOS_CALLBACKSCHEDULER_Schedule(stateEstimationCallback, TIMEOUT_MS, CALLBACK_UPDATEMODE_SOONER);
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return;
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}
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alarm = FILTERRESULT_OK;
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// set alarm to warning if called through timeout
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if (updatedSensors == 0) {
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if (PIOS_DELAY_DiffuS(last_time) > 1000 * TIMEOUT_MS) {
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alarm = FILTERRESULT_WARNING;
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}
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} else {
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last_time = PIOS_DELAY_GetRaw();
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}
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// check if a new filter chain should be initialized
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if (fusionAlgorithm != revoSettings.FusionAlgorithm) {
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FlightStatusData fs;
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FlightStatusGet(&fs);
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if (fs.Armed == FLIGHTSTATUS_ARMED_DISARMED || fusionAlgorithm == FILTER_INIT_FORCE) {
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const filterPipeline *newFilterChain;
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switch ((RevoSettingsFusionAlgorithmOptions)revoSettings.FusionAlgorithm) {
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case REVOSETTINGS_FUSIONALGORITHM_BASICCOMPLEMENTARY:
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newFilterChain = cfQueue;
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break;
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case REVOSETTINGS_FUSIONALGORITHM_COMPLEMENTARYMAG:
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newFilterChain = cfmiQueue;
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break;
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case REVOSETTINGS_FUSIONALGORITHM_COMPLEMENTARYMAGGPSOUTDOOR:
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newFilterChain = cfmQueue;
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break;
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case REVOSETTINGS_FUSIONALGORITHM_INS13INDOOR:
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newFilterChain = ekf13iQueue;
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break;
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case REVOSETTINGS_FUSIONALGORITHM_GPSNAVIGATIONINS13:
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newFilterChain = ekf13Queue;
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break;
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default:
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newFilterChain = NULL;
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}
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// initialize filters in chain
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current = newFilterChain;
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bool error = 0;
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while (current != NULL) {
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int32_t result = current->filter->init((stateFilter *)current->filter);
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if (result != 0) {
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error = 1;
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break;
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}
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current = current->next;
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}
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if (error) {
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AlarmsSet(SYSTEMALARMS_ALARM_ATTITUDE, SYSTEMALARMS_ALARM_ERROR);
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return;
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} else {
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// set new fusion algortithm
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filterChain = newFilterChain;
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fusionAlgorithm = revoSettings.FusionAlgorithm;
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}
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}
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}
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// read updated sensor UAVObjects and set initial state
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states.updated = updatedSensors;
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updatedSensors = 0;
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// fetch sensors, check values, and load into state struct
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FETCH_SENSOR_FROM_UAVOBJECT_CHECK_AND_LOAD_TO_STATE_3_DIMENSIONS(GyroSensor, gyro, x, y, z);
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if (IS_SET(states.updated, SENSORUPDATES_gyro)) {
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gyroRaw[0] = states.gyro[0];
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gyroRaw[1] = states.gyro[1];
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gyroRaw[2] = states.gyro[2];
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}
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FETCH_SENSOR_FROM_UAVOBJECT_CHECK_AND_LOAD_TO_STATE_3_DIMENSIONS(AccelSensor, accel, x, y, z);
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FETCH_SENSOR_FROM_UAVOBJECT_CHECK_AND_LOAD_TO_STATE_3_DIMENSIONS(MagSensor, boardMag, x, y, z);
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FETCH_SENSOR_FROM_UAVOBJECT_CHECK_AND_LOAD_TO_STATE_3_DIMENSIONS(AuxMagSensor, auxMag, x, y, z);
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FETCH_SENSOR_FROM_UAVOBJECT_CHECK_AND_LOAD_TO_STATE_3_DIMENSIONS(GPSVelocitySensor, vel, North, East, Down);
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FETCH_SENSOR_FROM_UAVOBJECT_CHECK_AND_LOAD_TO_STATE_1_DIMENSION_WITH_CUSTOM_EXTRA_CHECK(BaroSensor, baro, Altitude, true);
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FETCH_SENSOR_FROM_UAVOBJECT_CHECK_AND_LOAD_TO_STATE_2_DIMENSION_WITH_CUSTOM_EXTRA_CHECK(AirspeedSensor, airspeed, CalibratedAirspeed, TrueAirspeed, s.SensorConnected == AIRSPEEDSENSOR_SENSORCONNECTED_TRUE);
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// GPS position data (LLA) is not fetched here since it does not contain floats. The filter must do all checks itself
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// at this point sensor state is stored in "states" with some rudimentary filtering applied
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// apply all filters in the current filter chain
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current = filterChain;
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// we are not done, re-dispatch self execution
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while (current) {
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filterResult result = current->filter->filter((stateFilter *)current->filter, &states);
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if (result > alarm) {
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alarm = result;
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}
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current = current->next;
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}
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// the final output of filters is saved in state variables
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// EXPORT_STATE_TO_UAVOBJECT_IF_UPDATED_3_DIMENSIONS(GyroState, gyro, x, y, z) // replaced by performance shortcut
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if (IS_SET(states.updated, SENSORUPDATES_gyro)) {
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gyroDelta[0] = states.gyro[0] - gyroRaw[0];
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gyroDelta[1] = states.gyro[1] - gyroRaw[1];
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gyroDelta[2] = states.gyro[2] - gyroRaw[2];
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}
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EXPORT_STATE_TO_UAVOBJECT_IF_UPDATED_3_DIMENSIONS(AccelState, accel, x, y, z);
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if (IS_SET(states.updated, SENSORUPDATES_mag)) {
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MagStateData s;
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MagStateGet(&s);
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s.x = states.mag[0];
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s.y = states.mag[1];
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s.z = states.mag[2];
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switch (states.magStatus) {
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case MAGSTATUS_OK:
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s.Source = MAGSTATE_SOURCE_ONBOARD;
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break;
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case MAGSTATUS_AUX:
|
|
s.Source = MAGSTATE_SOURCE_AUX;
|
|
break;
|
|
default:
|
|
s.Source = MAGSTATE_SOURCE_INVALID;
|
|
}
|
|
MagStateSet(&s);
|
|
}
|
|
|
|
EXPORT_STATE_TO_UAVOBJECT_IF_UPDATED_3_DIMENSIONS(PositionState, pos, North, East, Down);
|
|
EXPORT_STATE_TO_UAVOBJECT_IF_UPDATED_3_DIMENSIONS(VelocityState, vel, North, East, Down);
|
|
EXPORT_STATE_TO_UAVOBJECT_IF_UPDATED_2_DIMENSIONS(AirspeedState, airspeed, CalibratedAirspeed, TrueAirspeed);
|
|
// attitude nees manual conversion from quaternion to euler
|
|
if (IS_SET(states.updated, SENSORUPDATES_attitude)) { \
|
|
AttitudeStateData s;
|
|
AttitudeStateGet(&s);
|
|
s.q1 = states.attitude[0];
|
|
s.q2 = states.attitude[1];
|
|
s.q3 = states.attitude[2];
|
|
s.q4 = states.attitude[3];
|
|
Quaternion2RPY(&s.q1, &s.Roll);
|
|
AttitudeStateSet(&s);
|
|
}
|
|
// throttle alarms, raise alarm flags immediately
|
|
// but require system to run for a while before decreasing
|
|
// to prevent alarm flapping
|
|
if (alarm >= lastAlarm) {
|
|
lastAlarm = alarm;
|
|
alarmcounter = 0;
|
|
} else {
|
|
if (alarmcounter < 100) {
|
|
alarmcounter++;
|
|
} else {
|
|
lastAlarm = alarm;
|
|
alarmcounter = 0;
|
|
}
|
|
}
|
|
|
|
// clear alarms if everything is alright, then schedule callback execution after timeout
|
|
if (lastAlarm == FILTERRESULT_WARNING) {
|
|
AlarmsSet(SYSTEMALARMS_ALARM_ATTITUDE, SYSTEMALARMS_ALARM_WARNING);
|
|
} else if (lastAlarm == FILTERRESULT_CRITICAL) {
|
|
AlarmsSet(SYSTEMALARMS_ALARM_ATTITUDE, SYSTEMALARMS_ALARM_CRITICAL);
|
|
} else if (lastAlarm >= FILTERRESULT_ERROR) {
|
|
AlarmsSet(SYSTEMALARMS_ALARM_ATTITUDE, SYSTEMALARMS_ALARM_ERROR);
|
|
} else {
|
|
AlarmsClear(SYSTEMALARMS_ALARM_ATTITUDE);
|
|
}
|
|
|
|
if (updatedSensors) {
|
|
PIOS_CALLBACKSCHEDULER_Dispatch(stateEstimationCallback);
|
|
} else {
|
|
PIOS_CALLBACKSCHEDULER_Schedule(stateEstimationCallback, TIMEOUT_MS, CALLBACK_UPDATEMODE_SOONER);
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Callback for eventdispatcher when RevoSettings has been updated
|
|
*/
|
|
static void settingsUpdatedCb(__attribute__((unused)) UAVObjEvent *ev)
|
|
{
|
|
RevoSettingsGet((RevoSettingsData *)&revoSettings);
|
|
}
|
|
|
|
/**
|
|
* Callback for eventdispatcher when HomeLocation has been updated
|
|
*/
|
|
static void homeLocationUpdatedCb(__attribute__((unused)) UAVObjEvent *ev)
|
|
{
|
|
// Ask for a filter init (necessary for LLA filter)
|
|
// Only possible if disarmed
|
|
fusionAlgorithm = FILTER_INIT_IF_POSSIBLE;
|
|
}
|
|
|
|
|
|
/**
|
|
* Callback for eventdispatcher when any sensor UAVObject has been updated
|
|
* updates the list of "recently updated UAVObjects" and dispatches the state estimator callback
|
|
*/
|
|
static void sensorUpdatedCb(UAVObjEvent *ev)
|
|
{
|
|
if (!ev) {
|
|
return;
|
|
}
|
|
|
|
if (ev->obj == GyroSensorHandle()) {
|
|
updatedSensors |= SENSORUPDATES_gyro;
|
|
// shortcut - update GyroState right away
|
|
GyroSensorData s;
|
|
GyroStateData t;
|
|
GyroSensorGet(&s);
|
|
t.x = s.x + gyroDelta[0];
|
|
t.y = s.y + gyroDelta[1];
|
|
t.z = s.z + gyroDelta[2];
|
|
GyroStateSet(&t);
|
|
}
|
|
|
|
if (ev->obj == AccelSensorHandle()) {
|
|
updatedSensors |= SENSORUPDATES_accel;
|
|
}
|
|
|
|
if (ev->obj == MagSensorHandle()) {
|
|
updatedSensors |= SENSORUPDATES_boardMag;
|
|
}
|
|
|
|
if (ev->obj == AuxMagSensorHandle()) {
|
|
updatedSensors |= SENSORUPDATES_auxMag;
|
|
}
|
|
|
|
if (ev->obj == GPSPositionSensorHandle()) {
|
|
updatedSensors |= SENSORUPDATES_lla;
|
|
}
|
|
|
|
if (ev->obj == GPSVelocitySensorHandle()) {
|
|
updatedSensors |= SENSORUPDATES_vel;
|
|
}
|
|
|
|
if (ev->obj == BaroSensorHandle()) {
|
|
updatedSensors |= SENSORUPDATES_baro;
|
|
}
|
|
|
|
if (ev->obj == AirspeedSensorHandle()) {
|
|
updatedSensors |= SENSORUPDATES_airspeed;
|
|
}
|
|
|
|
PIOS_CALLBACKSCHEDULER_Dispatch(stateEstimationCallback);
|
|
}
|
|
|
|
|
|
/**
|
|
* @}
|
|
* @}
|
|
*/
|