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+/****************************************************************************
+ *
+ * Copyright (c) 2013-2015 PX4 Development Team. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * 3. Neither the name PX4 nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/**
+ * @file FixedwingLandDetector.h
+ * Land detection algorithm for fixedwing
+ *
+ * @author Johan Jansen <jnsn.johan@gmail.com>
+ */
+
+#ifndef __FIXED_WING_LAND_DETECTOR_H__
+#define __FIXED_WING_LAND_DETECTOR_H__
+
+#include "LandDetector.h"
+#include <uORB/topics/vehicle_local_position.h>
+#include <uORB/topics/airspeed.h>
+#include <uORB/topics/parameter_update.h>
+#include <systemlib/param/param.h>
+
+class FixedwingLandDetector : public LandDetector
+{
+public:
+ FixedwingLandDetector();
+
+protected:
+ /**
+ * @brief blocking loop, should be run in a separate thread or task. Runs at 50Hz
+ **/
+ bool update() override;
+
+ /**
+ * @brief Initializes the land detection algorithm
+ **/
+ void initialize() override;
+
+ /**
+ * @brief polls all subscriptions and pulls any data that has changed
+ **/
+ void updateSubscriptions();
+
+private:
+ /**
+ * @brief download and update local parameter cache
+ **/
+ void updateParameterCache(const bool force);
+
+ /**
+ * @brief Handles for interesting parameters
+ **/
+ struct {
+ param_t maxVelocity;
+ param_t maxClimbRate;
+ param_t maxAirSpeed;
+ } _paramHandle;
+
+ struct {
+ float maxVelocity;
+ float maxClimbRate;
+ float maxAirSpeed;
+ } _params;
+
+private:
+ int _vehicleLocalPositionSub; /**< notification of local position */
+ struct vehicle_local_position_s _vehicleLocalPosition; /**< the result from local position subscription */
+ int _airspeedSub;
+ struct airspeed_s _airspeed;
+ int _parameterSub;
+
+ float _velocity_xy_filtered;
+ float _velocity_z_filtered;
+ float _airspeed_filtered;
+ uint64_t _landDetectTrigger;
+};
+
+#endif //__FIXED_WING_LAND_DETECTOR_H__