/*!
 * \file thermostat.h
 * \brief
 *    Application wide data type declarations
 *
 * Author: Christos Choutouridis AEM: 8997
 * email : <cchoutou@ece.auth.gr>
 */
#ifndef THERMOSTAT_H_
#define THERMOSTAT_H_

/*
 * Hard coded user settings
 */
#define  MEAS_WINDOW       (120)    // [sec]
#define  MEAS_INTERVAL     (5)      // [sec]
#define  MEASUREMENTS      (MEAS_WINDOW / MEAS_INTERVAL)    // keep this integer
#define  UI_AVERAGE_TIME   (10)     // [sec]
//#define  UI_USER_TIME      (10)


typedef float  float_t;    //!< Select the floating point type for application
typedef int    int_t;      //!< Select the integer type for application

/*!
 * Thermostat mode enumerator
 */
typedef enum {
   HEATING =0, //!< HEATING
   COOLING     //!< COOLING
} mode_en;

/*!
 * Application common data type
 */
typedef struct {
   float_t  T[MEASUREMENTS];  //!< Temperature samples
   float_t  Tav;              //!< Average temperature
   uint32_t cur;              //!< Cursor on sample array
   uint8_t  flag_output;      //!< Momentary flag to indicate the relay state
   uint8_t  flag_init;        //!< Momentary flag to indicate the end of initialization state
   uint8_t  flag_proximity;   //!< Momentary flag to indicate that the user is near
   uint8_t  signal_cycle;     //!< Acknolegable flag to indicate the end of measurement cycle
} app_data_t;

/*!
 * Settings struct
 */
typedef struct {
   mode_en  mode;    //!< Operational mode
   float_t  Tset;    //!< Target temperature
   float_t  Thyst;   //!< Target temperature hysteresis
   float_t  Pset;    //!< Proximity distance
   float_t  Physt;   //!< Proximity distance hysteresis
} settings_t;

/*!
 * User interface states
 */
typedef enum {
   ST_INIT =0, //!< ST_INIT:     Still initializing
   ST_COUNT,   //!< ST_COUNT:    Measurement cycle
   ST_AVERAGE, //!< ST_AVERAGE:  Display average
   ST_USER     //!< ST_USER:     Display when a user is near
} state_en;

/*
 * globals
 */
extern app_data_t     app_data;
extern state_en       state;
extern settings_t     settings;

/*!
 * Factory defaults
 */
#define _Init_settings(s)  s = { \
      .mode = HEATING,           \
      .Tset = 21.0,              \
      .Thyst = 2.0,              \
      .Pset = 75.0,              \
      .Physt = 10.0              \
}
#endif /* THERMOSTAT_H_ */