Diff: Drivers/BSP/Components/hts221/hts221.c

Revision:

4:137bb367ba50

Child:

7:bfe8272ced90

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Drivers/BSP/Components/hts221/hts221.c	Fri Apr 14 13:09:54 2017 +0200
@@ -0,0 +1,247 @@
+/**
+ ******************************************************************************
+ * @file    hts221.c
+ * @author  MCD Application Team
+ * @version V1.0.0
+ * @date    14-February-2017
+ * @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</center></h2>
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *   1. Redistributions of source code must retain the above copyright notice,
+ *      this list of conditions and the following disclaimer.
+ *   2. Redistributions in binary form must reproduce the above copyright notice,
+ *      this list of conditions and the following disclaimer in the documentation
+ *      and/or other materials provided with the distribution.
+ *   3. Neither the name of STMicroelectronics nor the names of its contributors
+ *      may be used to endorse or promote products derived from this software
+ *      without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ ******************************************************************************
+ */
+
+/* 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****/