twr_sht20.h

#ifndef _TWR_SHT20_H
#define _TWR_SHT20_H
 
#include <twr_i2c.h>
#include <twr_scheduler.h>
 
 
 
typedef enum
{
    TWR_SHT20_EVENT_ERROR = 0,
 
    TWR_SHT20_EVENT_UPDATE = 1
 
} twr_sht20_event_t;
 
 
typedef struct twr_sht20_t twr_sht20_t;
 
 
typedef enum
{
    TWR_SHT20_STATE_ERROR = -1,
    TWR_SHT20_STATE_INITIALIZE = 0,
    TWR_SHT20_STATE_MEASURE_RH = 1,
    TWR_SHT20_STATE_READ_RH = 2,
    TWR_SHT20_STATE_MEASURE_T = 3,
    TWR_SHT20_STATE_READ_T = 4,
    TWR_SHT20_STATE_UPDATE = 5
 
} twr_sht20_state_t;
 
struct twr_sht20_t
{
    twr_i2c_channel_t _i2c_channel;
    uint8_t _i2c_address;
    twr_scheduler_task_id_t _task_id_interval;
    twr_scheduler_task_id_t _task_id_measure;
    void (*_event_handler)(twr_sht20_t *, twr_sht20_event_t, void *);
    void *_event_param;
    bool _measurement_active;
    twr_tick_t _update_interval;
    twr_sht20_state_t _state;
    twr_tick_t _tick_ready;
    bool _humidity_valid;
    bool _temperature_valid;
    uint16_t _reg_humidity;
    uint16_t _reg_temperature;
};
 
 
 
void twr_sht20_init(twr_sht20_t *self, twr_i2c_channel_t i2c_channel, uint8_t i2c_address);
 
void twr_sht20_deinit(twr_sht20_t *self);
 
 
void twr_sht20_set_event_handler(twr_sht20_t *self, void (*event_handler)(twr_sht20_t *, twr_sht20_event_t, void *), void *event_param);
 
 
void twr_sht20_set_update_interval(twr_sht20_t *self, twr_tick_t interval);
 
 
bool twr_sht20_measure(twr_sht20_t *self);
 
 
bool twr_sht20_get_humidity_raw(twr_sht20_t *self, uint16_t *raw);
 
 
bool twr_sht20_get_humidity_percentage(twr_sht20_t *self, float *percentage);
 
 
bool twr_sht20_get_temperature_raw(twr_sht20_t *self, uint16_t *raw);
 
 
bool twr_sht20_get_temperature_celsius(twr_sht20_t *self, float *celsius);
 
 
bool twr_sht20_get_temperature_fahrenheit(twr_sht20_t *self, float *fahrenheit);
 
 
bool twr_sht20_get_temperature_kelvin(twr_sht20_t *self, float *kelvin);
 
 
#endif // _TWR_SHT20_H