/home/travis/build/lis-epfl/MAVRIC_Library/drivers/airspeed_analog.hpp

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/*******************************************************************************
 * \file airspedd_analog.hpp
 *
 * \author MAV'RIC Team
 * \author Julien Lecoeur
 * \author Simon Pyroth
 *
 * \brief This file is the driver for the DIYdrones airspeed sensor V20
 * (old analog version)
 *
 ******************************************************************************/


#ifndef AIRSPEED_ANALOG_HPP_
#define AIRSPEED_ANALOG_HPP_

#include <cstdint>
#include "hal/common/adc.hpp"



typedef struct
{
    float pressure_offset;          
    float calibration_gain;         
    float conversion_factor;        
    float correction_gain;          
    float correction_offset;        
    float filter_gain;              
} airspeed_analog_conf_t;

static inline airspeed_analog_conf_t airspeed_analog_default_config();

class Airspeed_analog
{
public:
    Airspeed_analog(Adc& adc, airspeed_analog_conf_t config = airspeed_analog_default_config());

    void start_calibration(void);

    void stop_calibration(void);

    bool update(void);

    const float& get_airspeed() const;

    const float& get_last_airspeed() const;

private:
    float get_raw_differential_pressure(void);

    Adc& adc_;                              

    airspeed_analog_conf_t config_;         

    float voltage;                          

    float differential_pressure;            

    float raw_airspeed;                     
    float scaled_airspeed;                  
    float airspeed;                         
    float last_airspeed;                    

    bool calibrating;                       

};



static inline airspeed_analog_conf_t airspeed_analog_default_config()
{
    airspeed_analog_conf_t conf = {};

    conf.pressure_offset = 0.0f;
    conf.calibration_gain = 0.9f;
    conf.conversion_factor = 0.3945f;
    conf.correction_gain = 1.0f;
    conf.correction_offset = 0.0f;
    conf.filter_gain = 0.7f;

    return conf;
}

#endif /* AIRSPEED_ANALOG_HPP_ */