twr_atsha204.h

#ifndef _TWR_ATSHA204_H
#define _TWR_ATSHA204_H
 
#include <twr_common.h>
#include <twr_i2c.h>
#include <twr_scheduler.h>
 
#define TWR_ATSHA204_RX_BUFFER_SIZE 32
 
 
typedef enum
{
    TWR_ATSHA204_EVENT_ERROR = 0,
 
    TWR_ATSHA204_EVENT_REVISION_NUMBER = 1,
 
    TWR_ATSHA204_EVENT_SERIAL_NUMBER = 2
 
} twr_atsha204_event_t;
 
 
typedef struct twr_atsha204_t twr_atsha204_t;
 
 
typedef enum
{
    TWR_ATSHA204_STATE_READY = 0,
    TWR_ATSHA204_STATE_READ_SERIAL_NUMBER = 1,
    TWR_ATSHA204_STATE_READ_SERIAL_NUMBER2 = 2,
    TWR_ATSHA204_STATE_SERIAL_NUMBER = 3
 
} twr_atsha204_state_t;
 
struct twr_atsha204_t
{
    twr_i2c_channel_t _i2c_channel;
    uint8_t _i2c_address;
    void (*_event_handler)(twr_atsha204_t *, twr_atsha204_event_t, void *);
    void *_event_param;
    twr_scheduler_task_id_t _task_id;
    twr_atsha204_state_t _state;
    bool _ready;
    uint8_t _rx_buffer[TWR_ATSHA204_RX_BUFFER_SIZE];
 
};
 
 
 
void twr_atsha204_init(twr_atsha204_t *self, twr_i2c_channel_t i2c_channel, uint8_t i2c_address);
 
 
void twr_atsha204_set_event_handler(twr_atsha204_t *self, void (*event_handler)(twr_atsha204_t *, twr_atsha204_event_t, void *), void *event_param);
 
 
bool twr_atsha204_is_ready(twr_atsha204_t *self);
 
 
bool twr_atsha204_read_serial_number(twr_atsha204_t *self);
 
 
bool twr_atsha204_get_serial_number(twr_atsha204_t *self, void *destination, size_t size);
 
 
#endif // _TWR_ATSHA204_H