229 lines
4.9 KiB
C
229 lines
4.9 KiB
C
/**
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******************************************************************************
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* @file lps22hb.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 LPS22HB
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* pressure and temperature devices
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******************************************************************************
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* @attention
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*
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* <h2><center>© Copyright (c) 2017 STMicroelectronics.
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* All rights reserved.</center></h2>
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*
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* This software component is licensed by ST under BSD 3-Clause license,
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* the "License"; You may not use this file except in compliance with the
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* License. You may obtain a copy of the License at:
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* opensource.org/licenses/BSD-3-Clause
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "lps22hb.h"
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/** @addtogroup BSP
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* @{
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*/
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/** @addtogroup Component
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* @{
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*/
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/** @defgroup LPS22HB LPS22HB
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* @{
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*/
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/** @defgroup LPS22HB_Private_FunctionsPrototypes LPS22HB Private Functions Prototypes
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* @{
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*/
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static void LPS22HB_Init(uint16_t DeviceAddr);
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/**
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* @}
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*/
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/** @defgroup LPS22HB_Private_Variables LPS22HB Private Variables
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* @{
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*/
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/* Pressure Private Variables */
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PSENSOR_DrvTypeDef LPS22HB_P_Drv =
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{
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LPS22HB_P_Init,
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LPS22HB_P_ReadID,
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LPS22HB_P_ReadPressure
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};
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/* Temperature Private Variables */
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TSENSOR_DrvTypeDef LPS22HB_T_Drv =
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{
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LPS22HB_T_Init,
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0,
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0,
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LPS22HB_T_ReadTemp
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};
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/**
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* @}
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*/
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/** @defgroup LPS22HB_Pressure_Private_Functions LPS22HB Pressure Private Functions
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* @{
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*/
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/**
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* @brief Set LPS22HB pressure sensor Initialization.
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*/
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void LPS22HB_P_Init(uint16_t DeviceAddr)
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{
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LPS22HB_Init(DeviceAddr);
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}
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/**
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* @brief Read LPS22HB ID.
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* @retval ID
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*/
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uint8_t LPS22HB_P_ReadID(uint16_t DeviceAddr)
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{
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uint8_t ctrl = 0x00;
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/* IO interface initialization */
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SENSOR_IO_Init();
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/* Read value at Who am I register address */
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ctrl = SENSOR_IO_Read(DeviceAddr, LPS22HB_WHO_AM_I_REG);
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return ctrl;
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}
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/**
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* @brief Read pressure value of LPS22HB
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* @retval pressure value
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*/
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float LPS22HB_P_ReadPressure(uint16_t DeviceAddr)
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{
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int32_t raw_press;
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uint8_t buffer[3];
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uint32_t tmp = 0;
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uint8_t i;
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for(i = 0; i < 3; i++)
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{
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buffer[i] = SENSOR_IO_Read(DeviceAddr, (LPS22HB_PRESS_OUT_XL_REG + i));
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}
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/* Build the raw data */
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for(i = 0; i < 3; i++)
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tmp |= (((uint32_t)buffer[i]) << (8 * i));
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/* convert the 2's complement 24 bit to 2's complement 32 bit */
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if(tmp & 0x00800000)
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tmp |= 0xFF000000;
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raw_press = ((int32_t)tmp);
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raw_press = (raw_press * 100) / 4096;
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return (float)((float)raw_press / 100.0f);
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}
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/**
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* @}
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*/
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/** @defgroup LPS22HB_Temperature_Private_Functions LPS22HB Temperature Private Functions
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* @{
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*/
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/**
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* @brief Set LPS22HB temperature sensor Initialization.
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* @param DeviceAddr: I2C device address
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* @param InitStruct: pointer to a TSENSOR_InitTypeDef structure
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* that contains the configuration setting for the HTS221.
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* @retval None
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*/
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void LPS22HB_T_Init(uint16_t DeviceAddr, TSENSOR_InitTypeDef *pInitStruct)
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{
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LPS22HB_Init(DeviceAddr);
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}
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/**
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* @brief Read temperature value of LPS22HB
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* @param DeviceAddr: I2C device address
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* @retval temperature value
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*/
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float LPS22HB_T_ReadTemp(uint16_t DeviceAddr)
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{
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int16_t raw_data;
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uint8_t buffer[2];
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uint16_t tmp;
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uint8_t i;
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for(i = 0; i < 2; i++)
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{
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buffer[i] = SENSOR_IO_Read(DeviceAddr, (LPS22HB_TEMP_OUT_L_REG + i));
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}
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/* Build the raw tmp */
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tmp = (((uint16_t)buffer[1]) << 8) + (uint16_t)buffer[0];
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raw_data = (tmp * 10) / 100;
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return ((float)(raw_data / 10.0f));
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}
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/**
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* @}
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*/
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/** @addtogroup LPS22HB_Private_Functions LPS22HB Private functions
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* @{
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*/
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/**
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* @brief Set LPS22HB Initialization.
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* @param DeviceAddr: I2C device address
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* @retval None
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*/
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static void LPS22HB_Init(uint16_t DeviceAddr)
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{
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uint8_t tmp;
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/* Set Power mode */
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tmp = SENSOR_IO_Read(DeviceAddr, LPS22HB_RES_CONF_REG);
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tmp &= ~LPS22HB_LCEN_MASK;
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tmp |= (uint8_t)0x01; /* Set low current mode */
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SENSOR_IO_Write(DeviceAddr, LPS22HB_RES_CONF_REG, tmp);
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/* Read CTRL_REG1 */
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tmp = SENSOR_IO_Read(DeviceAddr, LPS22HB_CTRL_REG1);
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/* Set default ODR */
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tmp &= ~LPS22HB_ODR_MASK;
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tmp |= (uint8_t)0x30; /* Set ODR to 25Hz */
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/* Enable BDU */
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tmp &= ~LPS22HB_BDU_MASK;
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tmp |= ((uint8_t)0x02);
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/* Apply settings to CTRL_REG1 */
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SENSOR_IO_Write(DeviceAddr, LPS22HB_CTRL_REG1, tmp);
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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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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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