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Jose
2025-10-27 17:07:20 +01:00
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P3_SETR2/Components/hts221/hts221.c Normal file
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/**
******************************************************************************
* @file hts221.c
* @author MCD Application Team
* @brief This file provides a set of functions needed to manage the HTS221
* humidity and temperature devices
******************************************************************************
* @attention
*
* <h2><center>&copy; Copyright (c) 2017 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 "hts221.h"
/** @addtogroup BSP
* @{
*/
/** @addtogroup Component
* @{
*/
/** @defgroup HTS221 HTS221
* @{
*/
/** @defgroup HTS221_Private_Variables HTS221 Private Variables
* @{
*/
/* HTS221 Humidity Private Variables */
HSENSOR_DrvTypeDef HTS221_H_Drv =
{
HTS221_H_Init,
HTS221_H_ReadID,
HTS221_H_ReadHumidity
};
/* HTS221_Temperature_Private_Variables */
TSENSOR_DrvTypeDef HTS221_T_Drv =
{
HTS221_T_Init,
0,
0,
HTS221_T_ReadTemp
};
/**
* @}
*/
/** @defgroup HTS221_Humidity_Private_Functions HTS221 Humidity Private Functions
* @{
*/
/**
* @brief Set HTS221 humidity sensor Initialization.
*/
void HTS221_H_Init(uint16_t DeviceAddr)
{
uint8_t tmp;
/* Read CTRL_REG1 */
tmp = SENSOR_IO_Read(DeviceAddr, HTS221_CTRL_REG1);
/* Enable BDU */
tmp &= ~HTS221_BDU_MASK;
tmp |= (1 << HTS221_BDU_BIT);
/* Set default ODR */
tmp &= ~HTS221_ODR_MASK;
tmp |= (uint8_t)0x01; /* Set ODR to 1Hz */
/* Activate the device */
tmp |= HTS221_PD_MASK;
/* Apply settings to CTRL_REG1 */
SENSOR_IO_Write(DeviceAddr, HTS221_CTRL_REG1, tmp);
}
/**
* @brief Read HTS221 ID.
* @retval ID
*/
uint8_t HTS221_H_ReadID(uint16_t DeviceAddr)
{
uint8_t ctrl = 0x00;
/* IO interface initialization */
SENSOR_IO_Init();
/* Read value at Who am I register address */
ctrl = SENSOR_IO_Read(DeviceAddr, HTS221_WHO_AM_I_REG);
return ctrl;
}
/**
* @brief Read humidity value of HTS221
* @retval humidity value;
*/
float HTS221_H_ReadHumidity(uint16_t DeviceAddr)
{
int16_t H0_T0_out, H1_T0_out, H_T_out;
int16_t H0_rh, H1_rh;
uint8_t buffer[2];
float tmp_f;
SENSOR_IO_ReadMultiple(DeviceAddr, (HTS221_H0_RH_X2 | 0x80), buffer, 2);
H0_rh = buffer[0] >> 1;
H1_rh = buffer[1] >> 1;
SENSOR_IO_ReadMultiple(DeviceAddr, (HTS221_H0_T0_OUT_L | 0x80), buffer, 2);
H0_T0_out = (((uint16_t)buffer[1]) << 8) | (uint16_t)buffer[0];
SENSOR_IO_ReadMultiple(DeviceAddr, (HTS221_H1_T0_OUT_L | 0x80), buffer, 2);
H1_T0_out = (((uint16_t)buffer[1]) << 8) | (uint16_t)buffer[0];
SENSOR_IO_ReadMultiple(DeviceAddr, (HTS221_HR_OUT_L_REG | 0x80), buffer, 2);
H_T_out = (((uint16_t)buffer[1]) << 8) | (uint16_t)buffer[0];
tmp_f = (float)(H_T_out - H0_T0_out) * (float)(H1_rh - H0_rh) / (float)(H1_T0_out - H0_T0_out) + H0_rh;
tmp_f *= 10.0f;
tmp_f = ( tmp_f > 1000.0f ) ? 1000.0f
: ( tmp_f < 0.0f ) ? 0.0f
: tmp_f;
return (tmp_f / 10.0f);
}
/**
* @}
*/
/** @defgroup HTS221_Temperature_Private_Functions HTS221 Temperature Private Functions
* @{
*/
/**
* @brief Set HTS221 temperature sensor Initialization.
* @param DeviceAddr: I2C device address
* @param InitStruct: pointer to a TSENSOR_InitTypeDef structure
* that contains the configuration setting for the HTS221.
*/
void HTS221_T_Init(uint16_t DeviceAddr, TSENSOR_InitTypeDef *pInitStruct)
{
uint8_t tmp;
/* Read CTRL_REG1 */
tmp = SENSOR_IO_Read(DeviceAddr, HTS221_CTRL_REG1);
/* Enable BDU */
tmp &= ~HTS221_BDU_MASK;
tmp |= (1 << HTS221_BDU_BIT);
/* Set default ODR */
tmp &= ~HTS221_ODR_MASK;
tmp |= (uint8_t)0x01; /* Set ODR to 1Hz */
/* Activate the device */
tmp |= HTS221_PD_MASK;
/* Apply settings to CTRL_REG1 */
SENSOR_IO_Write(DeviceAddr, HTS221_CTRL_REG1, tmp);
}
/**
* @brief Read temperature value of HTS221
* @param DeviceAddr: I2C device address
* @retval temperature value
*/
float HTS221_T_ReadTemp(uint16_t DeviceAddr)
{
int16_t T0_out, T1_out, T_out, T0_degC_x8_u16, T1_degC_x8_u16;
int16_t T0_degC, T1_degC;
uint8_t buffer[4], tmp;
float tmp_f;
SENSOR_IO_ReadMultiple(DeviceAddr, (HTS221_T0_DEGC_X8 | 0x80), buffer, 2);
tmp = SENSOR_IO_Read(DeviceAddr, HTS221_T0_T1_DEGC_H2);
T0_degC_x8_u16 = (((uint16_t)(tmp & 0x03)) << 8) | ((uint16_t)buffer[0]);
T1_degC_x8_u16 = (((uint16_t)(tmp & 0x0C)) << 6) | ((uint16_t)buffer[1]);
T0_degC = T0_degC_x8_u16 >> 3;
T1_degC = T1_degC_x8_u16 >> 3;
SENSOR_IO_ReadMultiple(DeviceAddr, (HTS221_T0_OUT_L | 0x80), buffer, 4);
T0_out = (((uint16_t)buffer[1]) << 8) | (uint16_t)buffer[0];
T1_out = (((uint16_t)buffer[3]) << 8) | (uint16_t)buffer[2];
SENSOR_IO_ReadMultiple(DeviceAddr, (HTS221_TEMP_OUT_L_REG | 0x80), buffer, 2);
T_out = (((uint16_t)buffer[1]) << 8) | (uint16_t)buffer[0];
tmp_f = (float)(T_out - T0_out) * (float)(T1_degC - T0_degC) / (float)(T1_out - T0_out) + T0_degC;
return tmp_f;
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/