HIL: Added land detector to HIL simulation

src/modules/mavlink/mavlink_receiver.cpp

@@ -92,6 +92,7 @@ MavlinkReceiver::MavlinkReceiver(Mavlink *parent) :
 	_mavlink(parent),
 	status{},
 	hil_local_pos{},
+	hil_land_detector{},
 	_control_mode{},
 	_global_pos_pub(-1),
 	_local_pos_pub(-1),
@@ -118,6 +119,7 @@ MavlinkReceiver::MavlinkReceiver(Mavlink *parent) :
 	_telemetry_status_pub(-1),
 	_rc_pub(-1),
 	_manual_pub(-1),
+	_land_detector_pub(-1),
 	_control_mode_sub(orb_subscribe(ORB_ID(vehicle_control_mode))),
 	_hil_frames(0),
 	_old_timestamp(0),
@@ -1353,9 +1355,6 @@ MavlinkReceiver::handle_message_hil_state_quaternion(mavlink_message_t *msg)
 		hil_local_pos.xy_global = true;
 		hil_local_pos.z_global = true;
 
-		bool landed = (float)(hil_state.alt) / 1000.0f < (_hil_local_alt0 + 0.1f); // XXX improve?
-		hil_local_pos.landed = landed;
-
 		if (_local_pos_pub < 0) {
 			_local_pos_pub = orb_advertise(ORB_ID(vehicle_local_position), &hil_local_pos);
 
@@ -1364,6 +1363,22 @@ MavlinkReceiver::handle_message_hil_state_quaternion(mavlink_message_t *msg)
 		}
 	}
 
+	/* land detector */
+	{
+		bool landed = (float)(hil_state.alt) / 1000.0f < (_hil_local_alt0 + 0.1f); // XXX improve?
+		if(hil_land_detector.landed != landed) {
+			hil_land_detector.landed = landed;
+			hil_land_detector.timestamp = hrt_absolute_time();
+
+			if (_land_detector_pub < 0) {
+				_land_detector_pub = orb_advertise(ORB_ID(vehicle_land_detected), &hil_land_detector);
+
+			} else {
+				orb_publish(ORB_ID(vehicle_land_detected), _land_detector_pub, &hil_land_detector);
+			}
+		}
+	}
+
 	/* accelerometer */
 	{
 		struct accel_report accel;

src/modules/mavlink/mavlink_receiver.h

@@ -50,6 +50,7 @@
 #include <uORB/topics/vehicle_gps_position.h>
 #include <uORB/topics/vehicle_global_position.h>
 #include <uORB/topics/vehicle_local_position.h>
+#include <uORB/topics/vehicle_land_detected.h>
 #include <uORB/topics/home_position.h>
 #include <uORB/topics/vehicle_status.h>
 #include <uORB/topics/offboard_control_setpoint.h>
@@ -145,6 +146,7 @@ private:
 
 	mavlink_status_t status;
 	struct vehicle_local_position_s hil_local_pos;
+	struct vehicle_land_detected_s hil_land_detector;
 	struct vehicle_control_mode_s _control_mode;
 	orb_advert_t _global_pos_pub;
 	orb_advert_t _local_pos_pub;
@@ -171,6 +173,7 @@ private:
 	orb_advert_t _telemetry_status_pub;
 	orb_advert_t _rc_pub;
 	orb_advert_t _manual_pub;
+	orb_advert_t _land_detector_pub;
 	int _control_mode_sub;
 	int _hil_frames;
 	uint64_t _old_timestamp;