Contains the BSP driver for the B-L475E-IOT01 board.
Dependents: mbed-os-example-ble-Thermometer DISCO_L475VG_IOT01-Telegram-BOT DISCO_L475VG_IOT01-sche_cheveux DISCO_L475VG_IOT01-QSPI_FLASH_FILE_SYSTEM ... more
https://os.mbed.com/platforms/ST-Discovery-L475E-IOT01A/
Drivers/BSP/Components/lps22hb/lps22hb.c
- Committer:
- jeromecoutant
- Date:
- 2019-09-24
- Revision:
- 7:bfe8272ced90
- Parent:
- 4:137bb367ba50
File content as of revision 7:bfe8272ced90:
/** ****************************************************************************** * @file lps22hb.c * @author MCD Application Team * @brief This file provides a set of functions needed to manage the LPS22HB * pressure and temperature devices ****************************************************************************** * @attention * * <h2><center>© 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 "lps22hb.h" /** @addtogroup BSP * @{ */ /** @addtogroup Component * @{ */ /** @defgroup LPS22HB LPS22HB * @{ */ /** @defgroup LPS22HB_Private_FunctionsPrototypes LPS22HB Private Functions Prototypes * @{ */ static void LPS22HB_Init(uint16_t DeviceAddr); /** * @} */ /** @defgroup LPS22HB_Private_Variables LPS22HB Private Variables * @{ */ /* Pressure Private Variables */ PSENSOR_DrvTypeDef LPS22HB_P_Drv = { LPS22HB_P_Init, LPS22HB_P_ReadID, LPS22HB_P_ReadPressure }; /* Temperature Private Variables */ TSENSOR_DrvTypeDef LPS22HB_T_Drv = { LPS22HB_T_Init, 0, 0, LPS22HB_T_ReadTemp }; /** * @} */ /** @defgroup LPS22HB_Pressure_Private_Functions LPS22HB Pressure Private Functions * @{ */ /** * @brief Set LPS22HB pressure sensor Initialization. */ void LPS22HB_P_Init(uint16_t DeviceAddr) { LPS22HB_Init(DeviceAddr); } /** * @brief Read LPS22HB ID. * @retval ID */ uint8_t LPS22HB_P_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, LPS22HB_WHO_AM_I_REG); return ctrl; } /** * @brief Read pressure value of LPS22HB * @retval pressure value */ float LPS22HB_P_ReadPressure(uint16_t DeviceAddr) { int32_t raw_press; uint8_t buffer[3]; uint32_t tmp = 0; uint8_t i; for(i = 0; i < 3; i++) { buffer[i] = SENSOR_IO_Read(DeviceAddr, (LPS22HB_PRESS_OUT_XL_REG + i)); } /* Build the raw data */ for(i = 0; i < 3; i++) tmp |= (((uint32_t)buffer[i]) << (8 * i)); /* convert the 2's complement 24 bit to 2's complement 32 bit */ if(tmp & 0x00800000) tmp |= 0xFF000000; raw_press = ((int32_t)tmp); raw_press = (raw_press * 100) / 4096; return (float)((float)raw_press / 100.0f); } /** * @} */ /** @defgroup LPS22HB_Temperature_Private_Functions LPS22HB Temperature Private Functions * @{ */ /** * @brief Set LPS22HB temperature sensor Initialization. * @param DeviceAddr: I2C device address * @param InitStruct: pointer to a TSENSOR_InitTypeDef structure * that contains the configuration setting for the HTS221. * @retval None */ void LPS22HB_T_Init(uint16_t DeviceAddr, TSENSOR_InitTypeDef *pInitStruct) { LPS22HB_Init(DeviceAddr); } /** * @brief Read temperature value of LPS22HB * @param DeviceAddr: I2C device address * @retval temperature value */ float LPS22HB_T_ReadTemp(uint16_t DeviceAddr) { int16_t raw_data; uint8_t buffer[2]; uint16_t tmp; uint8_t i; for(i = 0; i < 2; i++) { buffer[i] = SENSOR_IO_Read(DeviceAddr, (LPS22HB_TEMP_OUT_L_REG + i)); } /* Build the raw tmp */ tmp = (((uint16_t)buffer[1]) << 8) + (uint16_t)buffer[0]; raw_data = (tmp * 10) / 100; return ((float)(raw_data / 10.0f)); } /** * @} */ /** @addtogroup LPS22HB_Private_Functions LPS22HB Private functions * @{ */ /** * @brief Set LPS22HB Initialization. * @param DeviceAddr: I2C device address * @retval None */ static void LPS22HB_Init(uint16_t DeviceAddr) { uint8_t tmp; /* Set Power mode */ tmp = SENSOR_IO_Read(DeviceAddr, LPS22HB_RES_CONF_REG); tmp &= ~LPS22HB_LCEN_MASK; tmp |= (uint8_t)0x01; /* Set low current mode */ SENSOR_IO_Write(DeviceAddr, LPS22HB_RES_CONF_REG, tmp); /* Read CTRL_REG1 */ tmp = SENSOR_IO_Read(DeviceAddr, LPS22HB_CTRL_REG1); /* Set default ODR */ tmp &= ~LPS22HB_ODR_MASK; tmp |= (uint8_t)0x30; /* Set ODR to 25Hz */ /* Enable BDU */ tmp &= ~LPS22HB_BDU_MASK; tmp |= ((uint8_t)0x02); /* Apply settings to CTRL_REG1 */ SENSOR_IO_Write(DeviceAddr, LPS22HB_CTRL_REG1, tmp); } /** * @} */ /** * @} */ /** * @} */ /** * @} */ /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/