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*
* Copyright (C) 2012-2013 PX4 Development Team. All rights reserved.
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/**
* @file differential_pressure.h
*
* Definition of differential pressure topic
*/
#ifndef TOPIC_DIFFERENTIAL_PRESSURE_H_
#define TOPIC_DIFFERENTIAL_PRESSURE_H_
#include "../uORB.h"
#include <stdint.h>
/**
* @addtogroup topics
* @{
*/
/**
* Differential pressure and airspeed
*/
struct differential_pressure_s {
uint64_t timestamp; /**< microseconds since system boot, needed to integrate */
float static_pressure_mbar; /**< Static / environment pressure */
float differential_pressure_mbar; /**< Differential pressure reading */
float temperature_celcius; /**< ambient temperature in celcius, -1 if unknown */
float indicated_airspeed_m_s; /**< indicated airspeed in meters per second, -1 if unknown */
float true_airspeed_m_s; /**< true airspeed in meters per second, -1 if unknown */
float voltage; /**< Voltage from the airspeed sensor (voltage divider already compensated) */
};
/**
* @}
*/
/* register this as object request broker structure */
ORB_DECLARE(differential_pressure);
#endif
