PX4-Autopilot/src/lib/sensor_calibration/Gyroscope.cpp

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#include "Gyroscope.hpp"

#include "Utilities.hpp"

#include <lib/parameters/param.h>

using namespace matrix;
using namespace time_literals;

namespace calibration
{

Gyroscope::Gyroscope()
{
	Reset();
}

Gyroscope::Gyroscope(uint32_t device_id, bool external)
{
	Reset();
	set_device_id(device_id, external);
}

void Gyroscope::set_device_id(uint32_t device_id, bool external)
{
	if (_device_id != device_id || _external != external) {
		set_external(external);
		_device_id = device_id;
		ParametersUpdate();
		SensorCorrectionsUpdate(true);
	}
}

void Gyroscope::set_external(bool external)
{
	// update priority default appropriately if not set
	if (_calibration_index < 0 || _priority < 0) {
		if ((_priority < 0) || (_priority > 100)) {
			_priority = external ? DEFAULT_EXTERNAL_PRIORITY : DEFAULT_PRIORITY;

		} else if (!_external && external && (_priority == DEFAULT_PRIORITY)) {
			// internal -> external
			_priority = DEFAULT_EXTERNAL_PRIORITY;

		} else if (_external && !external && (_priority == DEFAULT_EXTERNAL_PRIORITY)) {
			// external -> internal
			_priority = DEFAULT_PRIORITY;
		}
	}

	_external = external;
}

void Gyroscope::SensorCorrectionsUpdate(bool force)
{
	// check if the selected sensor has updated
	if (_sensor_correction_sub.updated() || force) {

		// valid device id required
		if (_device_id == 0) {
			return;
		}

		sensor_correction_s corrections;

		if (_sensor_correction_sub.copy(&corrections)) {
			// find sensor_corrections index
			for (int i = 0; i < MAX_SENSOR_COUNT; i++) {
				if (corrections.gyro_device_ids[i] == _device_id) {
					switch (i) {
					case 0:
						_thermal_offset = Vector3f{corrections.gyro_offset_0};
						return;
					case 1:
						_thermal_offset = Vector3f{corrections.gyro_offset_1};
						return;
					case 2:
						_thermal_offset = Vector3f{corrections.gyro_offset_2};
						return;
					case 3:
						_thermal_offset = Vector3f{corrections.gyro_offset_3};
						return;
					}
				}
			}
		}

		// zero thermal offset if not found
		_thermal_offset.zero();
	}
}

void Gyroscope::set_rotation(Rotation rotation)
{
	_rotation_enum = rotation;
	_rotation = get_rot_matrix(rotation);
}

void Gyroscope::ParametersUpdate()
{
	if (_device_id == 0) {
		Reset();
		return;
	}

	_calibration_index = FindCalibrationIndex(SensorString(), _device_id);

	if (_calibration_index >= 0) {

		// CAL_GYROx_ROT
		int32_t rotation_value = GetCalibrationParam(SensorString(), "ROT", _calibration_index);

		if (_external) {
			if ((rotation_value >= ROTATION_MAX) || (rotation_value < 0)) {
				PX4_ERR("External %s %d (%d) invalid rotation %d, resetting to rotation none",
					SensorString(), _device_id, _calibration_index, rotation_value);
				rotation_value = ROTATION_NONE;
				SetCalibrationParam(SensorString(), "ROT", _calibration_index, rotation_value);
			}

			_rotation_enum = static_cast<Rotation>(rotation_value);
			_rotation = get_rot_matrix(_rotation_enum);

		} else {
			// internal, CAL_GYROx_ROT -1
			if (rotation_value != -1) {
				PX4_ERR("Internal %s %d (%d) invalid rotation %d, resetting",
					SensorString(), _device_id, _calibration_index, rotation_value);
				SetCalibrationParam(SensorString(), "ROT", _calibration_index, -1);
			}

			_rotation = GetBoardRotation();
			_rotation_enum = ROTATION_NONE;
		}

		// CAL_GYROx_PRIO
		_priority = GetCalibrationParam(SensorString(), "PRIO", _calibration_index);

		if ((_priority < 0) || (_priority > 100)) {
			// reset to default, -1 is the uninitialized parameter value
			int32_t new_priority = _external ? DEFAULT_EXTERNAL_PRIORITY : DEFAULT_PRIORITY;

			if (_priority != -1) {
				PX4_ERR("%s %d (%d) invalid priority %d, resetting to %d", SensorString(), _device_id, _calibration_index, _priority,
					new_priority);
			}

			SetCalibrationParam(SensorString(), "PRIO", _calibration_index, new_priority);
			_priority = new_priority;
		}

		bool calibration_changed = false;

		// CAL_GYROx_OFF{X,Y,Z}
		const Vector3f offset = GetCalibrationParamsVector3f(SensorString(), "OFF", _calibration_index);

		if (Vector3f(_offset - offset).norm_squared() > 0.001f * 0.001f) {
			calibration_changed = true;
			_offset = offset;
		}

		if (calibration_changed) {
			_calibration_count++;
		}

	} else {
		Reset();
	}
}

void Gyroscope::Reset()
{
	_rotation.setIdentity();
	_rotation_enum = ROTATION_NONE;
	_offset.zero();
	_thermal_offset.zero();

	_priority = _external ? DEFAULT_EXTERNAL_PRIORITY : DEFAULT_PRIORITY;

	_calibration_index = -1;

	_calibration_count = 0;
}

bool Gyroscope::ParametersSave()
{
	if (_calibration_index >= 0) {
		// save calibration
		bool success = true;
		success &= SetCalibrationParam(SensorString(), "ID", _calibration_index, _device_id);
		success &= SetCalibrationParam(SensorString(), "PRIO", _calibration_index, _priority);
		success &= SetCalibrationParamsVector3f(SensorString(), "OFF", _calibration_index, _offset);

		if (_external) {
			success &= SetCalibrationParam(SensorString(), "ROT", _calibration_index, (int32_t)_rotation_enum);

		} else {
			success &= SetCalibrationParam(SensorString(), "ROT", _calibration_index, -1);
		}

		return success;
	}

	return false;
}

void Gyroscope::PrintStatus()
{
	PX4_INFO("%s %d EN: %d, offset: [%.4f %.4f %.4f]", SensorString(), device_id(), enabled(),
		 (double)_offset(0), (double)_offset(1), (double)_offset(2));

	if (_thermal_offset.norm() > 0.f) {
		PX4_INFO("%s %d temperature offset: [%.4f %.4f %.4f]", SensorString(), _device_id,
			 (double)_thermal_offset(0), (double)_thermal_offset(1), (double)_thermal_offset(2));
	}
}

} // namespace calibration