air_data.h

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/*
 * Copyright (C) 2013 Gautier Hattenberger
 *               2014 Felix Ruess <felix.ruess@gmail.com>
 *
 * This file is part of paparazzi
 *
 * paparazzi is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * paparazzi is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with paparazzi; see the file COPYING.  If not, see
 * <http://www.gnu.org/licenses/>.
 */

#ifndef AIR_DATA_H
#define AIR_DATA_H

#include "std.h"

struct AirData {
  float pressure;     
  float differential; 
  float temperature;  

  float airspeed;     
  float tas;          
  float tas_factor;   
  float qnh;              
  float amsl_baro;        
  bool amsl_baro_valid; 
  bool calc_airspeed;   
  bool calc_qnh_once;   
  bool calc_amsl_baro;  
  bool calc_tas_factor; 

  float aoa;          
  float sideslip;     
  float wind_speed;   
  float wind_dir;     
};

extern struct AirData air_data;

extern void air_data_init(void);

extern void air_data_periodic(void);

extern float air_data_get_amsl(void);

extern float eas_from_dynamic_pressure(float q);

extern float get_tas_factor(float p, float t);

extern float tas_from_eas(float eas);

extern float tas_from_dynamic_pressure(float q);


#endif