180 lines
4.2 KiB
C
180 lines
4.2 KiB
C
/**
|
|
******************************************************************************
|
|
* @file stlm75.c
|
|
* @author MCD Application Team
|
|
* @brief This file provides a set of functions needed to manage the STLM75
|
|
* Temperature Sensor.
|
|
******************************************************************************
|
|
* @attention
|
|
*
|
|
* <h2><center>© Copyright (c) 2014 STMicroelectronics.
|
|
* All rights reserved.</center></h2>
|
|
*
|
|
* This software component is licensed by ST under BSD 3-Clause license,
|
|
* the "License"; You may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at:
|
|
* opensource.org/licenses/BSD-3-Clause
|
|
*
|
|
******************************************************************************
|
|
*/
|
|
|
|
/* Includes ------------------------------------------------------------------*/
|
|
#include "stlm75.h"
|
|
|
|
/** @addtogroup BSP
|
|
* @{
|
|
*/
|
|
|
|
/** @addtogroup Components
|
|
* @{
|
|
*/
|
|
|
|
/** @defgroup STLM75
|
|
* @brief This file provides a set of functions needed to drive the
|
|
* STLM75 Temperature Sensor.
|
|
* @{
|
|
*/
|
|
|
|
/** @defgroup STLM75_Private_TypesDefinitions
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/** @defgroup STLM75_Private_Defines
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/** @defgroup STLM75_Private_Macros
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/** @defgroup STLM75_Private_Variables
|
|
* @{
|
|
*/
|
|
TSENSOR_DrvTypeDef Stlm75Drv =
|
|
{
|
|
STLM75_Init,
|
|
STLM75_IsReady,
|
|
STLM75_ReadStatus,
|
|
STLM75_ReadTemp,
|
|
};
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/** @defgroup STLM75_Private_FunctionPrototypes
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/** @defgroup STLM75_Private_Functions
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* @brief Set STLM75 Initialization.
|
|
* @param DeviceAddr : Device ID address.
|
|
* @param pInitStruct: pointer to a STLM75_InitTypeDef structure
|
|
* that contains the configuration setting for the STLM75.
|
|
* @retval None
|
|
*/
|
|
void STLM75_Init(uint16_t DeviceAddr, TSENSOR_InitTypeDef *pInitStruct)
|
|
{
|
|
uint8_t confreg = 0;
|
|
uint16_t tempreg = 0;
|
|
|
|
/* Set the Configuration Register */
|
|
confreg = (uint8_t)(pInitStruct->AlertMode | pInitStruct->ConversionMode);
|
|
TSENSOR_IO_Write(DeviceAddr, &confreg, LM75_REG_CONF, 1);
|
|
|
|
/* Set the Temperature Registers */
|
|
/* Keep the sign bit and shift the temperature value (as given value is integer, the 0.5 digit is not set) */
|
|
tempreg = (((pInitStruct->TemperatureLimitHigh & 0x7F) << 8) | (pInitStruct->TemperatureLimitHigh & 0x80));
|
|
TSENSOR_IO_Write(DeviceAddr, (uint8_t*)(&tempreg), LM75_REG_TOS, 2);
|
|
|
|
tempreg = (((pInitStruct->TemperatureLimitLow & 0x7F) << 8) | (pInitStruct->TemperatureLimitLow & 0x80));
|
|
TSENSOR_IO_Write(DeviceAddr, (uint8_t*)(&tempreg), LM75_REG_THYS, 2);
|
|
}
|
|
|
|
/**
|
|
* @brief Check if STLM75 sensor is ready or not
|
|
* @param DeviceAddr : Device ID address.
|
|
* @param Trials: Number of trials
|
|
* @retval READY or NOT
|
|
*/
|
|
uint8_t STLM75_IsReady(uint16_t DeviceAddr, uint32_t Trials)
|
|
{
|
|
/* Configure the low level interface ---------------------------------------*/
|
|
TSENSOR_IO_Init();
|
|
|
|
/* Check is Temperature Sensor is Ready to use */
|
|
return TSENSOR_IO_IsDeviceReady(DeviceAddr, Trials);
|
|
}
|
|
|
|
/**
|
|
* @brief Read The Temperature Sensor Status
|
|
* @param DeviceAddr : Device ID address.
|
|
* @retval Status
|
|
*/
|
|
uint8_t STLM75_ReadStatus(uint16_t DeviceAddr)
|
|
{
|
|
uint8_t tmp = 0;
|
|
|
|
/* Read Status register */
|
|
TSENSOR_IO_Read(DeviceAddr, &tmp, LM75_REG_CONF, 1);
|
|
|
|
/* Return Temperature Sensor Status */
|
|
return (uint8_t)(tmp);
|
|
}
|
|
|
|
/**
|
|
* @brief Read temperature value of STLM75
|
|
* @param DeviceAddr: Device ID address
|
|
* @retval temperature value
|
|
*/
|
|
float STLM75_ReadTemp(uint16_t DeviceAddr)
|
|
{
|
|
uint16_t tempreg = 0;
|
|
uint16_t tmp = 0;
|
|
|
|
/* Read Temperature registers */
|
|
TSENSOR_IO_Read(DeviceAddr, (uint8_t*)(&tempreg), LM75_REG_TEMP, 2);
|
|
|
|
tmp = ((tempreg & 0x00FF) << 8) | ((tempreg & 0xFF00) >> 8);
|
|
tempreg = (((tmp & 0x7F80) >> 7) | (tmp & 0x8000));
|
|
|
|
/* Return Temperature value */
|
|
return (float)tempreg;
|
|
}
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
|