178 lines
3.9 KiB
C
178 lines
3.9 KiB
C
/**
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******************************************************************************
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* @file stlm75.c
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* @author MCD Application Team
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* @brief This file provides a set of functions needed to manage the STLM75
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* Temperature Sensor.
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2014 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "stlm75.h"
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/** @addtogroup BSP
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* @{
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*/
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/** @addtogroup Components
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* @{
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*/
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/** @defgroup STLM75
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* @brief This file provides a set of functions needed to drive the
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* STLM75 Temperature Sensor.
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* @{
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*/
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/** @defgroup STLM75_Private_TypesDefinitions
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* @{
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*/
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/**
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* @}
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*/
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/** @defgroup STLM75_Private_Defines
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* @{
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*/
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/**
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* @}
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*/
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/** @defgroup STLM75_Private_Macros
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* @{
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*/
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/**
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* @}
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*/
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/** @defgroup STLM75_Private_Variables
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* @{
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*/
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TSENSOR_DrvTypeDef Stlm75Drv =
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{
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STLM75_Init,
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STLM75_IsReady,
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STLM75_ReadStatus,
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STLM75_ReadTemp,
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};
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/**
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* @}
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*/
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/** @defgroup STLM75_Private_FunctionPrototypes
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* @{
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*/
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/**
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* @}
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*/
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/** @defgroup STLM75_Private_Functions
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* @{
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*/
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/**
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* @brief Set STLM75 Initialization.
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* @param DeviceAddr : Device ID address.
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* @param pInitStruct: pointer to a STLM75_InitTypeDef structure
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* that contains the configuration setting for the STLM75.
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* @retval None
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*/
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void STLM75_Init(uint16_t DeviceAddr, TSENSOR_InitTypeDef *pInitStruct)
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{
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uint8_t confreg = 0;
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uint16_t tempreg = 0;
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/* Set the Configuration Register */
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confreg = (uint8_t)(pInitStruct->AlertMode | pInitStruct->ConversionMode);
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TSENSOR_IO_Write(DeviceAddr, &confreg, LM75_REG_CONF, 1);
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/* Set the Temperature Registers */
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/* Keep the sign bit and shift the temperature value (as given value is integer, the 0.5 digit is not set) */
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tempreg = (((pInitStruct->TemperatureLimitHigh & 0x7F) << 8) | (pInitStruct->TemperatureLimitHigh & 0x80));
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TSENSOR_IO_Write(DeviceAddr, (uint8_t*)(&tempreg), LM75_REG_TOS, 2);
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tempreg = (((pInitStruct->TemperatureLimitLow & 0x7F) << 8) | (pInitStruct->TemperatureLimitLow & 0x80));
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TSENSOR_IO_Write(DeviceAddr, (uint8_t*)(&tempreg), LM75_REG_THYS, 2);
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}
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/**
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* @brief Check if STLM75 sensor is ready or not
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* @param DeviceAddr : Device ID address.
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* @param Trials: Number of trials
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* @retval READY or NOT
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*/
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uint8_t STLM75_IsReady(uint16_t DeviceAddr, uint32_t Trials)
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{
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/* Configure the low level interface ---------------------------------------*/
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TSENSOR_IO_Init();
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/* Check is Temperature Sensor is Ready to use */
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return TSENSOR_IO_IsDeviceReady(DeviceAddr, Trials);
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}
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/**
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* @brief Read The Temperature Sensor Status
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* @param DeviceAddr : Device ID address.
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* @retval Status
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*/
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uint8_t STLM75_ReadStatus(uint16_t DeviceAddr)
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{
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uint8_t tmp = 0;
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/* Read Status register */
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TSENSOR_IO_Read(DeviceAddr, &tmp, LM75_REG_CONF, 1);
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/* Return Temperature Sensor Status */
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return (uint8_t)(tmp);
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}
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/**
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* @brief Read temperature value of STLM75
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* @param DeviceAddr: Device ID address
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* @retval temperature value
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*/
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uint16_t STLM75_ReadTemp(uint16_t DeviceAddr)
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{
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uint16_t tempreg = 0;
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uint16_t tmp = 0;
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/* Read Temperature registers */
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TSENSOR_IO_Read(DeviceAddr, (uint8_t*)(&tempreg), LM75_REG_TEMP, 2);
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tmp = ((tempreg & 0x00FF) << 8) | ((tempreg & 0xFF00) >> 8);
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tempreg = (((tmp & 0x7F80) >> 7) | (tmp & 0x8000));
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/* Return Temperature value */
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return (tempreg);
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}
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/**
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* @}
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*/
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/**
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* @}
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*/
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/**
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* @}
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*/
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/**
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* @}
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*/
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