hal_twim.h

#ifndef CODEBASE_HAL_HAL_TWIM_H_
#define CODEBASE_HAL_HAL_TWIM_H_

#include "nrf.h"

#ifdef NRF51
#error TWIM peripheral is not present in the nRF51 SoC
#endif

#if SYS_CFG_PRESENT == 1
#include "sys_config.h"
#endif
#ifndef HAL_TWIM_PERIPH_USED 
#define HAL_TWIM_PERIPH_USED 0
#endif


#define TWIM_USED           HAL_TWIM_PERIPH_USED

typedef enum
{
    HAL_TWI_FREQ_100K = TWI_FREQUENCY_FREQUENCY_K100, 
    HAL_TWI_FREQ_250K = TWI_FREQUENCY_FREQUENCY_K250, 
    HAL_TWI_FREQ_400K = TWI_FREQUENCY_FREQUENCY_K400  
} hal_twim_freq_t;

typedef enum {
    TWIM_TX,    
    TWIM_RX,    
    TWIM_TX_RX  
} twim_transfer_t;

typedef enum {
    TWIM_ERR_NONE,       
    TWIM_ERR_ADRS_NACK,  
    TWIM_ERR_DATA_NACK   
} twim_err_t;

typedef enum {
    TWIM_STARTED,   
    TWIM_BUSY,      
    TWIM_UNINIT     
} twim_ret_status;

#define TWIM_TX_DONE_MSK      (1<<TWIM_TX)
#define TWIM_RX_DONE_MSK      (1<<TWIM_RX)
#define TWIM_TX_RX_DONE_MSK   (1<<TWIM_TX_RX)

typedef struct
{
    uint32_t            scl;                 
    uint32_t            sda;                 
    hal_twim_freq_t     frequency;           
    uint32_t            irq_priority;        
    uint32_t            address;             
    void (*evt_handler)(twim_err_t evt, twim_transfer_t transfer);
    uint32_t            evt_mask;
} hal_twim_init_config_t;

void hal_twim_init(hal_twim_init_config_t * config);

void hal_twim_uninit(void);

twim_ret_status hal_twim_tx(uint8_t * tx_ptr, uint32_t tx_len);

twim_ret_status hal_twim_rx(uint8_t * rx_ptr, uint32_t rx_len);

twim_ret_status hal_twim_tx_rx(uint8_t * tx_ptr, uint32_t tx_len,
        uint8_t * rx_ptr, uint32_t rx_len);

uint32_t hal_twim_get_current_adrs(void);

#endif /* CODEBASE_HAL_HAL_TWIM_H_ */