text: /**
   * Copyright (c) 2015 - 2020, Nordic Semiconductor ASA
   *
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without modification,
   * are permitted provided that the following conditions are met:
   *
   * 1. Redistributions of source code must retain the above copyright notice, this
   *    list of conditions and the following disclaimer.
   *
   * 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
   *    conditions and the following disclaimer in the documentation and/or other
   *    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.
   *
   * 5. Any software provided in binary form under this license must not be reverse
   *    engineered, decompiled, modified and/or disassembled.
   *
   * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
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   * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
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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__
  