ardupilot/libraries/AP_Compass/AP_Compass_Backend.cpp

123 lines
3.3 KiB
C++

#include <AP_HAL/AP_HAL.h>
#include "AP_Compass.h"
#include "AP_Compass_Backend.h"
extern const AP_HAL::HAL& hal;
AP_Compass_Backend::AP_Compass_Backend(Compass &compass) :
_compass(compass)
{}
void AP_Compass_Backend::rotate_field(Vector3f &mag, uint8_t instance)
{
Compass::mag_state &state = _compass._state[instance];
mag.rotate(MAG_BOARD_ORIENTATION);
if (!state.external) {
// and add in AHRS_ORIENTATION setting if not an external compass
mag.rotate(_compass._board_orientation);
} else {
// add user selectable orientation
mag.rotate((enum Rotation)state.orientation.get());
}
}
void AP_Compass_Backend::publish_raw_field(const Vector3f &mag, uint32_t time_us, uint8_t instance)
{
Compass::mag_state &state = _compass._state[instance];
// note that we do not set last_update_usec here as otherwise the
// EKF and DCM would end up consuming compass data at the full
// sensor rate. We want them to consume only the filtered fields
state.last_update_ms = AP_HAL::millis();
_compass._calibrator[instance].new_sample(mag);
}
void AP_Compass_Backend::correct_field(Vector3f &mag, uint8_t i)
{
Compass::mag_state &state = _compass._state[i];
if (state.diagonals.get().is_zero()) {
state.diagonals.set(Vector3f(1.0f,1.0f,1.0f));
}
const Vector3f &offsets = state.offset.get();
const Vector3f &diagonals = state.diagonals.get();
const Vector3f &offdiagonals = state.offdiagonals.get();
const Vector3f &mot = state.motor_compensation.get();
/*
* note that _motor_offset[] is kept even if compensation is not
* being applied so it can be logged correctly
*/
mag += offsets;
if(_compass._motor_comp_type != AP_COMPASS_MOT_COMP_DISABLED && !is_zero(_compass._thr_or_curr)) {
state.motor_offset = mot * _compass._thr_or_curr;
mag += state.motor_offset;
} else {
state.motor_offset.zero();
}
Matrix3f mat(
diagonals.x, offdiagonals.x, offdiagonals.y,
offdiagonals.x, diagonals.y, offdiagonals.z,
offdiagonals.y, offdiagonals.z, diagonals.z
);
mag = mat * mag;
}
/*
copy latest data to the frontend from a backend
*/
void AP_Compass_Backend::publish_filtered_field(const Vector3f &mag, uint8_t instance)
{
Compass::mag_state &state = _compass._state[instance];
state.field = mag;
state.last_update_ms = AP_HAL::millis();
state.last_update_usec = AP_HAL::micros();
}
void AP_Compass_Backend::set_last_update_usec(uint32_t last_update, uint8_t instance)
{
Compass::mag_state &state = _compass._state[instance];
state.last_update_usec = last_update;
}
/*
register a new backend with frontend, returning instance which
should be used in publish_field()
*/
uint8_t AP_Compass_Backend::register_compass(void) const
{
return _compass.register_compass();
}
/*
set dev_id for an instance
*/
void AP_Compass_Backend::set_dev_id(uint8_t instance, uint32_t dev_id)
{
_compass._state[instance].dev_id.set(dev_id);
}
/*
set external for an instance
*/
void AP_Compass_Backend::set_external(uint8_t instance, bool external)
{
if (_compass._state[instance].external != 2) {
_compass._state[instance].external.set(external);
}
}
bool AP_Compass_Backend::is_external(uint8_t instance)
{
return _compass._state[instance].external;
}