twr_onewire.h

#ifndef _TWR_ONEWIRE_H
#define _TWR_ONEWIRE_H
 
#include <twr_gpio.h>
 
 
#define TWR_ONEWIRE_DEVICE_NUMBER_SKIP_ROM 0
 
 
typedef struct twr_onewire_t twr_onewire_t;
 
 
typedef struct
{
    bool (*init)(void *ctx);
    bool (*enable)(void *ctx);
    bool (*disable)(void *ctx);
    bool (*reset)(void *ctx);
    void (*write_bit)(void *ctx, uint8_t bit);
    uint8_t (*read_bit)(void *ctx);
    void (*write_byte)(void *ctx, uint8_t byte);
    uint8_t (*read_byte)(void *ctx);
    bool (*search_next)(void *ctx, twr_onewire_t *onewire, uint64_t *device_number);
 
} twr_onewire_driver_t;
 
struct twr_onewire_t
{
    uint8_t _last_discrepancy;
    uint8_t _last_family_discrepancy;
    bool _last_device_flag;
    uint8_t _last_rom_no[8];
 
    int _lock_count;
    void *_driver_ctx;
    const twr_onewire_driver_t *_driver;
    bool _auto_ds28e17_sleep_mode;
};
 
 
 
 
void twr_onewire_init_gpio(twr_onewire_t *self, twr_gpio_channel_t channel);
 
 
bool twr_onewire_init(twr_onewire_t *self, const twr_onewire_driver_t *driver, void *driver_ctx);
 
 
bool twr_onewire_transaction_start(twr_onewire_t *self);
 
 
bool twr_onewire_transaction_stop(twr_onewire_t *self);
 
 
bool twr_onewire_is_transaction(twr_onewire_t *self);
 
 
bool twr_onewire_reset(twr_onewire_t *self);
 
 
void twr_onewire_select(twr_onewire_t *self, uint64_t *device_number);
 
 
void twr_onewire_skip_rom(twr_onewire_t *self);
 
 
void twr_onewire_write(twr_onewire_t *self, const void *buffer, size_t length);
 
 
void twr_onewire_read(twr_onewire_t *self, void *buffer, size_t length);
 
 
void twr_onewire_write_byte(twr_onewire_t *self, uint8_t data);
 
 
uint8_t twr_onewire_read_byte(twr_onewire_t *self);
 
 
void twr_onewire_write_bit(twr_onewire_t *self, int bit);
 
 
int twr_onewire_read_bit(twr_onewire_t *self);
 
 
int twr_onewire_search_all(twr_onewire_t *self, uint64_t *device_list, size_t device_list_size);
 
 
int twr_onewire_search_family(twr_onewire_t *self, uint8_t family_code, uint64_t *device_list, size_t device_list_size);
 
 
void twr_onewire_search_start(twr_onewire_t *self, uint8_t family_code);
 
 
bool twr_onewire_search_next(twr_onewire_t *self, uint64_t *device_number);
 
 
void twr_onewire_auto_ds28e17_sleep_mode(twr_onewire_t *self, bool on);
 
 
uint8_t twr_onewire_crc8(const void *buffer, size_t length, uint8_t crc);
 
 
uint16_t twr_onewire_crc16(const void *buffer, size_t length, uint16_t crc);
 
 
#endif // _TWR_ONEWIRE_H