air_data.h

Go to the documentation of this file.

/*
 * 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