Merged airspeed filtering from Thomas Gubler

src/modules/uORB/topics/differential_pressure.h

@@ -54,8 +54,9 @@
 struct differential_pressure_s {
 	uint64_t	timestamp;			/**< microseconds since system boot, needed to integrate */
 	uint64_t	error_count;
-	float	differential_pressure_pa;	/**< Differential pressure reading */
-	float	max_differential_pressure_pa;	/**< Maximum differential pressure reading */
+	float	differential_pressure_pa;		/**< Differential pressure reading */
+	float	differential_pressure_filtered_pa;	/**< Low pass filtered differential pressure reading */
+	float	max_differential_pressure_pa;		/**< Maximum differential pressure reading */
 	float		voltage;			/**< Voltage from analog airspeed sensors (voltage divider already compensated) */
 	float		temperature;			/**< Temperature provided by sensor */
 

src/modules/uORB/topics/sensor_combined.h

@@ -104,6 +104,8 @@ struct sensor_combined_s {
 
 	float differential_pressure_pa;				/**< Airspeed sensor differential pressure                  */
 	uint64_t differential_pressure_timestamp;		/**< Last measurement timestamp */
+	float differential_pressure_filtered_pa;	/**< Low pass filtered airspeed sensor differential pressure reading */
+
 };
 
 /**