/**
 * Copyright (c) 2015 - 2021, Nordic Semiconductor ASA
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 * All rights reserved.
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 * are permitted provided that the following conditions are met:
 *
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 *    list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form, except as embedded into a Nordic
 *    Semiconductor ASA integrated circuit in a product or a software update for
 *    such product, must reproduce the above copyright notice, this list of
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 *    materials provided with the distribution.
 *
 * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
 *    contributors may be used to endorse or promote products derived from this
 *    software without specific prior written permission.
 *
 * 4. This software, with or without modification, must only be used with a
 *    Nordic Semiconductor ASA integrated circuit.
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 * 5. Any software provided in binary form under this license must not be reverse
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 */
#ifndef LM75B_H__
#define LM75B_H__


#include "nrf_twi_mngr.h"

#ifdef __cplusplus
extern "C" {
#endif


// 0x90 is the LM75B's address in the mbed Application Shield, it contains
// R/W bit and "nrf_drv_twi" (and consequently "nrf_twi_mngr") requires slave
// address without this bit, hence shifting.
#define LM75B_ADDR          (0x90U >> 1)

#define LM75B_REG_TEMP      0x00
#define LM75B_REG_CONF      0x01
#define LM75B_REG_THYST     0x02
#define LM75B_REG_TOS       0x03

// [use "/ 32" instead of ">> 5", as the result of right-shifting of a signed
//  type value is implementation-defined]
#define LM75B_GET_TEMPERATURE_VALUE(temp_hi, temp_lo) \
    ((((int16_t)temp_hi << 8) | temp_lo) / 32)


extern uint8_t NRF_TWI_MNGR_BUFFER_LOC_IND lm75b_conf_reg_addr;
extern uint8_t NRF_TWI_MNGR_BUFFER_LOC_IND lm75b_temp_reg_addr;
extern uint8_t NRF_TWI_MNGR_BUFFER_LOC_IND lm75b_tos_reg_addr;
extern uint8_t NRF_TWI_MNGR_BUFFER_LOC_IND lm75b_thyst_reg_addr;

#define LM75B_READ(p_reg_addr, p_buffer, byte_cnt) \
    NRF_TWI_MNGR_WRITE(LM75B_ADDR, p_reg_addr, 1,        NRF_TWI_MNGR_NO_STOP), \
    NRF_TWI_MNGR_READ (LM75B_ADDR, p_buffer,   byte_cnt, 0)

#define LM75B_READ_TEMP(p_buffer) \
    LM75B_READ(&lm75b_temp_reg_addr, p_buffer, 2)

#define LM75B_INIT_TRANSFER_COUNT 1

extern nrf_twi_mngr_transfer_t const lm75b_init_transfers[LM75B_INIT_TRANSFER_COUNT];

#ifdef __cplusplus
}
#endif

#endif // LM75B_H__
