mirror of https://github.com/ArduPilot/ardupilot
103 lines
2.4 KiB
C++
103 lines
2.4 KiB
C++
#include <AP_HAL/AP_HAL.h>
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#include "AP_InertialNav.h"
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#if AP_AHRS_NAVEKF_AVAILABLE
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/*
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A wrapper around the AP_InertialNav class which uses the NavEKF
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filter if available, and falls back to the AP_InertialNav filter
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when EKF is not available
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*/
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/**
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update internal state
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*/
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void AP_InertialNav_NavEKF::update()
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{
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// get the NE position relative to the local earth frame origin
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Vector2f posNE;
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if (_ahrs_ekf.get_relative_position_NE_origin(posNE)) {
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_relpos_cm.x = posNE.x * 100; // convert from m to cm
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_relpos_cm.y = posNE.y * 100; // convert from m to cm
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}
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// get the D position relative to the local earth frame origin
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float posD;
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if (_ahrs_ekf.get_relative_position_D_origin(posD)) {
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_relpos_cm.z = - posD * 100; // convert from m in NED to cm in NEU
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}
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// get the velocity relative to the local earth frame
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Vector3f velNED;
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if (_ahrs_ekf.get_velocity_NED(velNED)) {
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_velocity_cm = velNED * 100; // convert to cm/s
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_velocity_cm.z = -_velocity_cm.z; // convert from NED to NEU
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}
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}
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/**
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* get_filter_status : returns filter status as a series of flags
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*/
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nav_filter_status AP_InertialNav_NavEKF::get_filter_status() const
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{
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nav_filter_status status;
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_ahrs_ekf.get_filter_status(status);
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return status;
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}
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/**
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* get_position - returns the current position relative to the home location in cm.
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*
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* @return
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*/
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const Vector3f &AP_InertialNav_NavEKF::get_position(void) const
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{
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return _relpos_cm;
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}
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/**
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* get_velocity - returns the current velocity in cm/s
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*
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* @return velocity vector:
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* .x : latitude velocity in cm/s
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* .y : longitude velocity in cm/s
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* .z : vertical velocity in cm/s
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*/
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const Vector3f &AP_InertialNav_NavEKF::get_velocity() const
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{
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return _velocity_cm;
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}
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/**
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* get_speed_xy - returns the current horizontal speed in cm/s
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*
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* @returns the current horizontal speed in cm/s
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*/
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float AP_InertialNav_NavEKF::get_speed_xy() const
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{
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return norm(_velocity_cm.x, _velocity_cm.y);
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}
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/**
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* get_altitude - get latest altitude estimate in cm
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* @return
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*/
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float AP_InertialNav_NavEKF::get_altitude() const
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{
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return _relpos_cm.z;
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}
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/**
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* get_velocity_z - returns the current climbrate.
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*
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* @see get_velocity().z
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*
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* @return climbrate in cm/s
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*/
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float AP_InertialNav_NavEKF::get_velocity_z() const
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{
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return _velocity_cm.z;
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}
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#endif // AP_AHRS_NAVEKF_AVAILABLE
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