Deepti AST / Envt_Shield_F4_API

Environmental Shield API

BSP/Components/hts221/hts221.c@0:9e645e6ed2ce, 2014-08-19 (annotated)

Committer:
Deepti
Date:
Tue Aug 19 07:13:15 2014 +0000
Revision:
0:9e645e6ed2ce
Environment Shield API

Who changed what in which revision?

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Deepti 0:9e645e6ed2ce 1 /**
Deepti 0:9e645e6ed2ce 2 ******************************************************************************
Deepti 0:9e645e6ed2ce 3 * @file hts221.c
Deepti 0:9e645e6ed2ce 4 * @author AST Robotics Team
Deepti 0:9e645e6ed2ce 5 * @version V0.0.1
Deepti 0:9e645e6ed2ce 6 * @date 08-April-2014
Deepti 0:9e645e6ed2ce 7 * @brief This file provides a set of functions needed to manage the hts221.
Deepti 0:9e645e6ed2ce 8 ******************************************************************************
Deepti 0:9e645e6ed2ce 9 * @attention
Deepti 0:9e645e6ed2ce 10 *
Deepti 0:9e645e6ed2ce 11 * <h2><center>&copy; COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
Deepti 0:9e645e6ed2ce 12 *
Deepti 0:9e645e6ed2ce 13 * Redistribution and use in source and binary forms, with or without modification,
Deepti 0:9e645e6ed2ce 14 * are permitted provided that the following conditions are met:
Deepti 0:9e645e6ed2ce 15 * 1. Redistributions of source code must retain the above copyright notice,
Deepti 0:9e645e6ed2ce 16 * this list of conditions and the following disclaimer.
Deepti 0:9e645e6ed2ce 17 * 2. Redistributions in binary form must reproduce the above copyright notice,
Deepti 0:9e645e6ed2ce 18 * this list of conditions and the following disclaimer in the documentation
Deepti 0:9e645e6ed2ce 19 * and/or other materials provided with the distribution.
Deepti 0:9e645e6ed2ce 20 * 3. Neither the name of STMicroelectronics nor the names of its contributors
Deepti 0:9e645e6ed2ce 21 * may be used to endorse or promote products derived from this software
Deepti 0:9e645e6ed2ce 22 * without specific prior written permission.
Deepti 0:9e645e6ed2ce 23 *
Deepti 0:9e645e6ed2ce 24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
Deepti 0:9e645e6ed2ce 25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
Deepti 0:9e645e6ed2ce 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
Deepti 0:9e645e6ed2ce 27 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
Deepti 0:9e645e6ed2ce 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
Deepti 0:9e645e6ed2ce 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
Deepti 0:9e645e6ed2ce 30 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
Deepti 0:9e645e6ed2ce 31 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
Deepti 0:9e645e6ed2ce 32 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
Deepti 0:9e645e6ed2ce 33 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Deepti 0:9e645e6ed2ce 34 *
Deepti 0:9e645e6ed2ce 35 ******************************************************************************
Deepti 0:9e645e6ed2ce 36 */
Deepti 0:9e645e6ed2ce 37 /* Includes ------------------------------------------------------------------*/
Deepti 0:9e645e6ed2ce 38 #include "hts221.h"
Deepti 0:9e645e6ed2ce 39 #include <math.h>
Deepti 0:9e645e6ed2ce 40
Deepti 0:9e645e6ed2ce 41 /** @addtogroup BSP
Deepti 0:9e645e6ed2ce 42 * @{
Deepti 0:9e645e6ed2ce 43 */
Deepti 0:9e645e6ed2ce 44
Deepti 0:9e645e6ed2ce 45 /** @addtogroup STM32F439_SENSITRON
Deepti 0:9e645e6ed2ce 46 * @{
Deepti 0:9e645e6ed2ce 47 */
Deepti 0:9e645e6ed2ce 48
Deepti 0:9e645e6ed2ce 49 /** @addtogroup HTS221
Deepti 0:9e645e6ed2ce 50 * @{
Deepti 0:9e645e6ed2ce 51 */
Deepti 0:9e645e6ed2ce 52
Deepti 0:9e645e6ed2ce 53
Deepti 0:9e645e6ed2ce 54 /** @defgroup HTS221_Private_TypesDefinitions
Deepti 0:9e645e6ed2ce 55 * @{
Deepti 0:9e645e6ed2ce 56 */
Deepti 0:9e645e6ed2ce 57
Deepti 0:9e645e6ed2ce 58 /**
Deepti 0:9e645e6ed2ce 59 * @}
Deepti 0:9e645e6ed2ce 60 */
Deepti 0:9e645e6ed2ce 61
Deepti 0:9e645e6ed2ce 62 /** @defgroup HTS221_Private_Defines
Deepti 0:9e645e6ed2ce 63 * @{
Deepti 0:9e645e6ed2ce 64 */
Deepti 0:9e645e6ed2ce 65
Deepti 0:9e645e6ed2ce 66 /**
Deepti 0:9e645e6ed2ce 67 * @}
Deepti 0:9e645e6ed2ce 68 */
Deepti 0:9e645e6ed2ce 69
Deepti 0:9e645e6ed2ce 70 /** @defgroup HTS221_Private_Macros
Deepti 0:9e645e6ed2ce 71 * @{
Deepti 0:9e645e6ed2ce 72 */
Deepti 0:9e645e6ed2ce 73
Deepti 0:9e645e6ed2ce 74 /**
Deepti 0:9e645e6ed2ce 75 * @}
Deepti 0:9e645e6ed2ce 76 */
Deepti 0:9e645e6ed2ce 77
Deepti 0:9e645e6ed2ce 78 /** @defgroup HTS221_Private_Variables
Deepti 0:9e645e6ed2ce 79 * @{
Deepti 0:9e645e6ed2ce 80 */
Deepti 0:9e645e6ed2ce 81
Deepti 0:9e645e6ed2ce 82 HUM_TEMP_DrvTypeDef Hts221Drv =
Deepti 0:9e645e6ed2ce 83 {
Deepti 0:9e645e6ed2ce 84 HTS221_Init,
Deepti 0:9e645e6ed2ce 85 HTS221_Power_OFF,
Deepti 0:9e645e6ed2ce 86 HTS221_ReadID,
Deepti 0:9e645e6ed2ce 87 HTS221_RebootCmd,
Deepti 0:9e645e6ed2ce 88 HTS221_INT1InterruptConfig,
Deepti 0:9e645e6ed2ce 89 HTS221_EnableIT,
Deepti 0:9e645e6ed2ce 90 HTS221_DisableIT,
Deepti 0:9e645e6ed2ce 91 HTS221_GetHumidity,
Deepti 0:9e645e6ed2ce 92 HTS221_GetTemperature
Deepti 0:9e645e6ed2ce 93 };
Deepti 0:9e645e6ed2ce 94
Deepti 0:9e645e6ed2ce 95
Deepti 0:9e645e6ed2ce 96 /* Temperature in degree for calibration */
Deepti 0:9e645e6ed2ce 97 float T0_degC, T1_degC;
Deepti 0:9e645e6ed2ce 98
Deepti 0:9e645e6ed2ce 99 /* Output temperature value for calibration */
Deepti 0:9e645e6ed2ce 100 int16_t T0_out, T1_out;
Deepti 0:9e645e6ed2ce 101
Deepti 0:9e645e6ed2ce 102
Deepti 0:9e645e6ed2ce 103 /* Humidity for calibration */
Deepti 0:9e645e6ed2ce 104 float H0_rh, H1_rh;
Deepti 0:9e645e6ed2ce 105
Deepti 0:9e645e6ed2ce 106 /* Output Humidity value for calibration */
Deepti 0:9e645e6ed2ce 107 int16_t H0_T0_out, H1_T0_out;
Deepti 0:9e645e6ed2ce 108
Deepti 0:9e645e6ed2ce 109
Deepti 0:9e645e6ed2ce 110 /**
Deepti 0:9e645e6ed2ce 111 * @}
Deepti 0:9e645e6ed2ce 112 */
Deepti 0:9e645e6ed2ce 113
Deepti 0:9e645e6ed2ce 114 /** @defgroup HTS221_Private_FunctionPrototypes
Deepti 0:9e645e6ed2ce 115 * @{
Deepti 0:9e645e6ed2ce 116 */
Deepti 0:9e645e6ed2ce 117 static void HTS221_Power_On(void);
Deepti 0:9e645e6ed2ce 118
Deepti 0:9e645e6ed2ce 119 static void HTS221_Calibration(void);
Deepti 0:9e645e6ed2ce 120 /**
Deepti 0:9e645e6ed2ce 121 * @}
Deepti 0:9e645e6ed2ce 122 */
Deepti 0:9e645e6ed2ce 123
Deepti 0:9e645e6ed2ce 124 /** @defgroup HTS221_Private_Functions
Deepti 0:9e645e6ed2ce 125 * @{
Deepti 0:9e645e6ed2ce 126 */
Deepti 0:9e645e6ed2ce 127
Deepti 0:9e645e6ed2ce 128
Deepti 0:9e645e6ed2ce 129
Deepti 0:9e645e6ed2ce 130 /**
Deepti 0:9e645e6ed2ce 131 * @brief HTS221 Calibration procedure.
Deepti 0:9e645e6ed2ce 132 * @param None
Deepti 0:9e645e6ed2ce 133 * @retval None
Deepti 0:9e645e6ed2ce 134 */
Deepti 0:9e645e6ed2ce 135 static void HTS221_Calibration(void)
Deepti 0:9e645e6ed2ce 136 {
Deepti 0:9e645e6ed2ce 137 /* Temperature Calibration */
Deepti 0:9e645e6ed2ce 138 /* Temperature in degree for calibration ( "/8" to obtain float) */
Deepti 0:9e645e6ed2ce 139 uint16_t T0_degC_x8_L, T0_degC_x8_H, T1_degC_x8_L, T1_degC_x8_H;
Deepti 0:9e645e6ed2ce 140 uint8_t H0_rh_x2, H1_rh_x2;
Deepti 0:9e645e6ed2ce 141 uint8_t tempReg[2] = {0,0};
Deepti 0:9e645e6ed2ce 142
Deepti 0:9e645e6ed2ce 143 HUM_TEMP_IO_Read(tempReg, HTS221_ADDRESS, HTS221_T0_degC_X8_ADDR, 1);
Deepti 0:9e645e6ed2ce 144 T0_degC_x8_L = (uint16_t)tempReg[0];
Deepti 0:9e645e6ed2ce 145
Deepti 0:9e645e6ed2ce 146 HUM_TEMP_IO_Read(tempReg, HTS221_ADDRESS, HTS221_T1_T0_MSB_X8_ADDR, 1);
Deepti 0:9e645e6ed2ce 147 T0_degC_x8_H = (uint16_t) (tempReg[0] & 0x03);
Deepti 0:9e645e6ed2ce 148
Deepti 0:9e645e6ed2ce 149 T0_degC = ((float)((T0_degC_x8_H<<8) | (T0_degC_x8_L)))/8;
Deepti 0:9e645e6ed2ce 150
Deepti 0:9e645e6ed2ce 151 HUM_TEMP_IO_Read(tempReg, HTS221_ADDRESS, HTS221_T1_degC_X8_ADDR, 1);
Deepti 0:9e645e6ed2ce 152 T1_degC_x8_L = (uint16_t)tempReg[0];
Deepti 0:9e645e6ed2ce 153
Deepti 0:9e645e6ed2ce 154 HUM_TEMP_IO_Read(tempReg, HTS221_ADDRESS, HTS221_T1_T0_MSB_X8_ADDR, 1);
Deepti 0:9e645e6ed2ce 155 T1_degC_x8_H = (uint16_t) (tempReg[0] & 0x0C);
Deepti 0:9e645e6ed2ce 156 T1_degC_x8_H = T1_degC_x8_H >> 2;
Deepti 0:9e645e6ed2ce 157
Deepti 0:9e645e6ed2ce 158 T1_degC = ((float)((T1_degC_x8_H<<8) | (T1_degC_x8_L)))/8;
Deepti 0:9e645e6ed2ce 159
Deepti 0:9e645e6ed2ce 160 HUM_TEMP_IO_Read(tempReg, HTS221_ADDRESS, HTS221_T0_OUT_L_ADDR + 0x80, 2);
Deepti 0:9e645e6ed2ce 161 T0_out = ((((int16_t)tempReg[1]) << 8)+(int16_t)tempReg[0]);
Deepti 0:9e645e6ed2ce 162
Deepti 0:9e645e6ed2ce 163 HUM_TEMP_IO_Read(tempReg, HTS221_ADDRESS, HTS221_T1_OUT_L_ADDR + 0x80, 2);
Deepti 0:9e645e6ed2ce 164 T1_out = ((((int16_t)tempReg[1]) << 8)+(int16_t)tempReg[0]);
Deepti 0:9e645e6ed2ce 165
Deepti 0:9e645e6ed2ce 166 /* Humidity Calibration */
Deepti 0:9e645e6ed2ce 167 /* Humidity in degree for calibration ( "/2" to obtain float) */
Deepti 0:9e645e6ed2ce 168
Deepti 0:9e645e6ed2ce 169 HUM_TEMP_IO_Read(&H0_rh_x2, HTS221_ADDRESS, HTS221_H0_RH_X2_ADDR, 1);
Deepti 0:9e645e6ed2ce 170
Deepti 0:9e645e6ed2ce 171 HUM_TEMP_IO_Read(&H1_rh_x2, HTS221_ADDRESS, HTS221_H1_RH_X2_ADDR, 1);
Deepti 0:9e645e6ed2ce 172
Deepti 0:9e645e6ed2ce 173 HUM_TEMP_IO_Read(&tempReg[0], HTS221_ADDRESS, HTS221_H0_T0_OUT_L_ADDR + 0x80, 2);
Deepti 0:9e645e6ed2ce 174 H0_T0_out = ((((int16_t)tempReg[1]) << 8)+(int16_t)tempReg[0]);
Deepti 0:9e645e6ed2ce 175
Deepti 0:9e645e6ed2ce 176 HUM_TEMP_IO_Read(&tempReg[0], HTS221_ADDRESS, HTS221_H1_T0_OUT_L_ADDR + 0x80, 2);
Deepti 0:9e645e6ed2ce 177 H1_T0_out = ((((int16_t)tempReg[1]) << 8)+(int16_t)tempReg[0]);
Deepti 0:9e645e6ed2ce 178
Deepti 0:9e645e6ed2ce 179 H0_rh = ((float)H0_rh_x2)/2;
Deepti 0:9e645e6ed2ce 180 H1_rh = ((float)H1_rh_x2)/2;
Deepti 0:9e645e6ed2ce 181 }
Deepti 0:9e645e6ed2ce 182
Deepti 0:9e645e6ed2ce 183
Deepti 0:9e645e6ed2ce 184 /**
Deepti 0:9e645e6ed2ce 185 * @brief Set HTS221 Initialization.
Deepti 0:9e645e6ed2ce 186 * @param InitStruct: it contains the configuration setting for the HTS221.
Deepti 0:9e645e6ed2ce 187 * @retval None
Deepti 0:9e645e6ed2ce 188 */
Deepti 0:9e645e6ed2ce 189 void HTS221_Init(HUM_TEMP_InitTypeDef *HTS221_Init)
Deepti 0:9e645e6ed2ce 190 {
Deepti 0:9e645e6ed2ce 191 uint8_t tmp = 0x00;
Deepti 0:9e645e6ed2ce 192
Deepti 0:9e645e6ed2ce 193 /* Configure the low level interface ---------------------------------------*/
Deepti 0:9e645e6ed2ce 194 HUM_TEMP_IO_Init();
Deepti 0:9e645e6ed2ce 195
Deepti 0:9e645e6ed2ce 196 HTS221_Power_On();
Deepti 0:9e645e6ed2ce 197
Deepti 0:9e645e6ed2ce 198 HTS221_Calibration();
Deepti 0:9e645e6ed2ce 199
Deepti 0:9e645e6ed2ce 200 HUM_TEMP_IO_Read(&tmp, HTS221_ADDRESS, HTS221_CTRL_REG1_ADDR, 1);
Deepti 0:9e645e6ed2ce 201
Deepti 0:9e645e6ed2ce 202 /* Output Data Rate selection */
Deepti 0:9e645e6ed2ce 203 tmp &= ~(HTS221_ODR_MASK);
Deepti 0:9e645e6ed2ce 204 tmp |= HTS221_Init->OutputDataRate;
Deepti 0:9e645e6ed2ce 205
Deepti 0:9e645e6ed2ce 206 HUM_TEMP_IO_Write(&tmp, HTS221_ADDRESS, HTS221_CTRL_REG1_ADDR, 1);
Deepti 0:9e645e6ed2ce 207 }
Deepti 0:9e645e6ed2ce 208
Deepti 0:9e645e6ed2ce 209 /**
Deepti 0:9e645e6ed2ce 210 * @brief Read ID address of HTS221
Deepti 0:9e645e6ed2ce 211 * @param Device ID address
Deepti 0:9e645e6ed2ce 212 * @retval ID name
Deepti 0:9e645e6ed2ce 213 */
Deepti 0:9e645e6ed2ce 214 uint8_t HTS221_ReadID(void)
Deepti 0:9e645e6ed2ce 215 {
Deepti 0:9e645e6ed2ce 216 uint8_t tmp;
Deepti 0:9e645e6ed2ce 217
Deepti 0:9e645e6ed2ce 218 /* Read WHO I AM register */
Deepti 0:9e645e6ed2ce 219 HUM_TEMP_IO_Read(&tmp, HTS221_ADDRESS, HTS221_WHO_AM_I_ADDR, 1);
Deepti 0:9e645e6ed2ce 220
Deepti 0:9e645e6ed2ce 221 /* Return the ID */
Deepti 0:9e645e6ed2ce 222 return (uint8_t)tmp;
Deepti 0:9e645e6ed2ce 223 }
Deepti 0:9e645e6ed2ce 224
Deepti 0:9e645e6ed2ce 225 /**
Deepti 0:9e645e6ed2ce 226 * @brief Reboot memory content of HTS221
Deepti 0:9e645e6ed2ce 227 * @param None
Deepti 0:9e645e6ed2ce 228 * @retval None
Deepti 0:9e645e6ed2ce 229 */
Deepti 0:9e645e6ed2ce 230 void HTS221_RebootCmd(void)
Deepti 0:9e645e6ed2ce 231 {
Deepti 0:9e645e6ed2ce 232 uint8_t tmpreg;
Deepti 0:9e645e6ed2ce 233
Deepti 0:9e645e6ed2ce 234 /* Read CTRL_REG2 register */
Deepti 0:9e645e6ed2ce 235 HUM_TEMP_IO_Read(&tmpreg, HTS221_ADDRESS, HTS221_CTRL_REG2_ADDR, 1);
Deepti 0:9e645e6ed2ce 236
Deepti 0:9e645e6ed2ce 237 /* Enable or Disable the reboot memory */
Deepti 0:9e645e6ed2ce 238 tmpreg |= HTS221_BOOT_REBOOTMEMORY;
Deepti 0:9e645e6ed2ce 239
Deepti 0:9e645e6ed2ce 240 /* Write value to MEMS CTRL_REG2 regsister */
Deepti 0:9e645e6ed2ce 241 HUM_TEMP_IO_Write(&tmpreg, HTS221_ADDRESS, HTS221_CTRL_REG2_ADDR, 1);
Deepti 0:9e645e6ed2ce 242 }
Deepti 0:9e645e6ed2ce 243
Deepti 0:9e645e6ed2ce 244 /**
Deepti 0:9e645e6ed2ce 245 * @brief Set HTS221 Interrupt INT1 configuration
Deepti 0:9e645e6ed2ce 246 * @param HTS221_InterruptConfig_TypeDef: pointer to a HTS221_InterruptConfig_TypeDef
Deepti 0:9e645e6ed2ce 247 * structure that contains the configuration setting for the HTS221 Interrupt.
Deepti 0:9e645e6ed2ce 248 * @retval None
Deepti 0:9e645e6ed2ce 249 */
Deepti 0:9e645e6ed2ce 250 void HTS221_INT1InterruptConfig(uint16_t Int1Config)
Deepti 0:9e645e6ed2ce 251 {
Deepti 0:9e645e6ed2ce 252
Deepti 0:9e645e6ed2ce 253 }
Deepti 0:9e645e6ed2ce 254
Deepti 0:9e645e6ed2ce 255 /**
Deepti 0:9e645e6ed2ce 256 * @brief Enable INT1
Deepti 0:9e645e6ed2ce 257 * @retval None
Deepti 0:9e645e6ed2ce 258 */
Deepti 0:9e645e6ed2ce 259 void HTS221_EnableIT(uint8_t IntPin)
Deepti 0:9e645e6ed2ce 260 {
Deepti 0:9e645e6ed2ce 261
Deepti 0:9e645e6ed2ce 262 }
Deepti 0:9e645e6ed2ce 263
Deepti 0:9e645e6ed2ce 264 /**
Deepti 0:9e645e6ed2ce 265 * @brief Disable INT1
Deepti 0:9e645e6ed2ce 266 * @retval None
Deepti 0:9e645e6ed2ce 267 */
Deepti 0:9e645e6ed2ce 268 void HTS221_DisableIT(uint8_t IntPin)
Deepti 0:9e645e6ed2ce 269 {
Deepti 0:9e645e6ed2ce 270
Deepti 0:9e645e6ed2ce 271 }
Deepti 0:9e645e6ed2ce 272
Deepti 0:9e645e6ed2ce 273
Deepti 0:9e645e6ed2ce 274 /**
Deepti 0:9e645e6ed2ce 275 * @brief Read HTS221 output register, and calculate the humidity.
Deepti 0:9e645e6ed2ce 276 * @param pfData : Data out pointer
Deepti 0:9e645e6ed2ce 277 * @retval None
Deepti 0:9e645e6ed2ce 278 */
Deepti 0:9e645e6ed2ce 279 void HTS221_GetHumidity(float* pfData)
Deepti 0:9e645e6ed2ce 280 {
Deepti 0:9e645e6ed2ce 281 int16_t H_T_out, humidity_t;
Deepti 0:9e645e6ed2ce 282 uint8_t tempReg[2] = {0,0};
Deepti 0:9e645e6ed2ce 283 uint8_t tmp = 0x00;
Deepti 0:9e645e6ed2ce 284 float H_rh;
Deepti 0:9e645e6ed2ce 285
Deepti 0:9e645e6ed2ce 286 HUM_TEMP_IO_Read(&tmp, HTS221_ADDRESS, HTS221_CTRL_REG1_ADDR, 1);
Deepti 0:9e645e6ed2ce 287
Deepti 0:9e645e6ed2ce 288 /* Output Data Rate selection */
Deepti 0:9e645e6ed2ce 289 tmp &= (HTS221_ODR_MASK);
Deepti 0:9e645e6ed2ce 290
Deepti 0:9e645e6ed2ce 291 if(tmp == 0x00){
Deepti 0:9e645e6ed2ce 292
Deepti 0:9e645e6ed2ce 293 HUM_TEMP_IO_Read(&tmp, HTS221_ADDRESS, HTS221_CTRL_REG2_ADDR, 1);
Deepti 0:9e645e6ed2ce 294
Deepti 0:9e645e6ed2ce 295 /* Serial Interface Mode selection */
Deepti 0:9e645e6ed2ce 296 tmp &= ~(HTS221_ONE_SHOT_MASK);
Deepti 0:9e645e6ed2ce 297 tmp |= HTS221_ONE_SHOT_START;
Deepti 0:9e645e6ed2ce 298
Deepti 0:9e645e6ed2ce 299 HUM_TEMP_IO_Write(&tmp, HTS221_ADDRESS, HTS221_CTRL_REG2_ADDR, 1);
Deepti 0:9e645e6ed2ce 300
Deepti 0:9e645e6ed2ce 301 do{
Deepti 0:9e645e6ed2ce 302
Deepti 0:9e645e6ed2ce 303 HUM_TEMP_IO_Read(&tmp, HTS221_ADDRESS, HTS221_STATUS_REG_ADDR, 1);
Deepti 0:9e645e6ed2ce 304
Deepti 0:9e645e6ed2ce 305 }while(!(tmp&&0x02));
Deepti 0:9e645e6ed2ce 306
Deepti 0:9e645e6ed2ce 307 }
Deepti 0:9e645e6ed2ce 308
Deepti 0:9e645e6ed2ce 309
Deepti 0:9e645e6ed2ce 310 HUM_TEMP_IO_Read(&tempReg[0], HTS221_ADDRESS, HTS221_HUMIDITY_OUT_L_ADDR + 0x80, 2);
Deepti 0:9e645e6ed2ce 311 H_T_out = ((((int16_t)tempReg[1]) << 8)+(int16_t)tempReg[0]);
Deepti 0:9e645e6ed2ce 312
Deepti 0:9e645e6ed2ce 313 H_rh = ((float)(H_T_out - H0_T0_out))/(H1_T0_out - H0_T0_out) * (H1_rh - H0_rh) + H0_rh;
Deepti 0:9e645e6ed2ce 314
Deepti 0:9e645e6ed2ce 315 humidity_t = (uint16_t)(H_rh * pow(10,HUM_DECIMAL_DIGITS));
Deepti 0:9e645e6ed2ce 316
Deepti 0:9e645e6ed2ce 317 *pfData = ((float)humidity_t)/pow(10,HUM_DECIMAL_DIGITS);
Deepti 0:9e645e6ed2ce 318 }
Deepti 0:9e645e6ed2ce 319
Deepti 0:9e645e6ed2ce 320 /**
Deepti 0:9e645e6ed2ce 321 * @brief Read HTS221 output register, and calculate the temperature.
Deepti 0:9e645e6ed2ce 322 * @param pfData : Data out pointer
Deepti 0:9e645e6ed2ce 323 * @retval None
Deepti 0:9e645e6ed2ce 324 */
Deepti 0:9e645e6ed2ce 325 void HTS221_GetTemperature(float* pfData)
Deepti 0:9e645e6ed2ce 326 {
Deepti 0:9e645e6ed2ce 327 int16_t T_out, temperature_t;
Deepti 0:9e645e6ed2ce 328 uint8_t tempReg[2] = {0,0};
Deepti 0:9e645e6ed2ce 329 uint8_t tmp = 0x00;
Deepti 0:9e645e6ed2ce 330 float T_degC;
Deepti 0:9e645e6ed2ce 331
Deepti 0:9e645e6ed2ce 332 HUM_TEMP_IO_Read(&tmp, HTS221_ADDRESS, HTS221_CTRL_REG1_ADDR, 1);
Deepti 0:9e645e6ed2ce 333
Deepti 0:9e645e6ed2ce 334 /* Output Data Rate selection */
Deepti 0:9e645e6ed2ce 335 tmp &= (HTS221_ODR_MASK);
Deepti 0:9e645e6ed2ce 336
Deepti 0:9e645e6ed2ce 337 if(tmp == 0x00){
Deepti 0:9e645e6ed2ce 338
Deepti 0:9e645e6ed2ce 339 HUM_TEMP_IO_Read(&tmp, HTS221_ADDRESS, HTS221_CTRL_REG2_ADDR, 1);
Deepti 0:9e645e6ed2ce 340
Deepti 0:9e645e6ed2ce 341 /* Serial Interface Mode selection */
Deepti 0:9e645e6ed2ce 342 tmp &= ~(HTS221_ONE_SHOT_MASK);
Deepti 0:9e645e6ed2ce 343 tmp |= HTS221_ONE_SHOT_START;
Deepti 0:9e645e6ed2ce 344
Deepti 0:9e645e6ed2ce 345 HUM_TEMP_IO_Write(&tmp, HTS221_ADDRESS, HTS221_CTRL_REG2_ADDR, 1);
Deepti 0:9e645e6ed2ce 346
Deepti 0:9e645e6ed2ce 347 do{
Deepti 0:9e645e6ed2ce 348
Deepti 0:9e645e6ed2ce 349 HUM_TEMP_IO_Read(&tmp, HTS221_ADDRESS, HTS221_STATUS_REG_ADDR, 1);
Deepti 0:9e645e6ed2ce 350
Deepti 0:9e645e6ed2ce 351 }while(!(tmp&&0x01));
Deepti 0:9e645e6ed2ce 352
Deepti 0:9e645e6ed2ce 353 }
Deepti 0:9e645e6ed2ce 354
Deepti 0:9e645e6ed2ce 355 HUM_TEMP_IO_Read(&tempReg[0], HTS221_ADDRESS, HTS221_TEMP_OUT_L_ADDR + 0x80, 2);
Deepti 0:9e645e6ed2ce 356 T_out = ((((int16_t)tempReg[1]) << 8)+(int16_t)tempReg[0]);
Deepti 0:9e645e6ed2ce 357
Deepti 0:9e645e6ed2ce 358 T_degC = ((float)(T_out - T0_out))/(T1_out - T0_out) * (T1_degC - T0_degC) + T0_degC;
Deepti 0:9e645e6ed2ce 359
Deepti 0:9e645e6ed2ce 360 temperature_t = (int16_t)(T_degC * pow(10,TEMP_DECIMAL_DIGITS));
Deepti 0:9e645e6ed2ce 361
Deepti 0:9e645e6ed2ce 362 *pfData = ((float)temperature_t)/pow(10,TEMP_DECIMAL_DIGITS);
Deepti 0:9e645e6ed2ce 363 }
Deepti 0:9e645e6ed2ce 364
Deepti 0:9e645e6ed2ce 365
Deepti 0:9e645e6ed2ce 366 /**
Deepti 0:9e645e6ed2ce 367 * @brief Exit the shutdown mode for HTS221.
Deepti 0:9e645e6ed2ce 368 * @retval None
Deepti 0:9e645e6ed2ce 369 */
Deepti 0:9e645e6ed2ce 370 static void HTS221_Power_On()
Deepti 0:9e645e6ed2ce 371 {
Deepti 0:9e645e6ed2ce 372 uint8_t tmpReg;
Deepti 0:9e645e6ed2ce 373
Deepti 0:9e645e6ed2ce 374 /* Read the register content */
Deepti 0:9e645e6ed2ce 375 HUM_TEMP_IO_Read(&tmpReg, HTS221_ADDRESS, HTS221_CTRL_REG1_ADDR, 1);
Deepti 0:9e645e6ed2ce 376
Deepti 0:9e645e6ed2ce 377 /* Set the power down bit */
Deepti 0:9e645e6ed2ce 378 tmpReg |= HTS221_MODE_ACTIVE;
Deepti 0:9e645e6ed2ce 379
Deepti 0:9e645e6ed2ce 380 /* Write register */
Deepti 0:9e645e6ed2ce 381 HUM_TEMP_IO_Write(&tmpReg, HTS221_ADDRESS, HTS221_CTRL_REG1_ADDR, 1);
Deepti 0:9e645e6ed2ce 382 }
Deepti 0:9e645e6ed2ce 383
Deepti 0:9e645e6ed2ce 384 /**
Deepti 0:9e645e6ed2ce 385 * @brief Enter the shutdown mode for HTS221.
Deepti 0:9e645e6ed2ce 386 * @retval None
Deepti 0:9e645e6ed2ce 387 */
Deepti 0:9e645e6ed2ce 388 void HTS221_Power_OFF()
Deepti 0:9e645e6ed2ce 389 {
Deepti 0:9e645e6ed2ce 390 uint8_t tmpReg;
Deepti 0:9e645e6ed2ce 391
Deepti 0:9e645e6ed2ce 392 /* Read the register content */
Deepti 0:9e645e6ed2ce 393 HUM_TEMP_IO_Read(&tmpReg, HTS221_ADDRESS, HTS221_CTRL_REG1_ADDR, 1);
Deepti 0:9e645e6ed2ce 394
Deepti 0:9e645e6ed2ce 395 /* Reset the power down bit */
Deepti 0:9e645e6ed2ce 396 tmpReg &= ~(HTS221_MODE_ACTIVE);
Deepti 0:9e645e6ed2ce 397
Deepti 0:9e645e6ed2ce 398 /* Write register */
Deepti 0:9e645e6ed2ce 399 HUM_TEMP_IO_Write(&tmpReg, HTS221_ADDRESS, HTS221_CTRL_REG1_ADDR, 1);
Deepti 0:9e645e6ed2ce 400 }
Deepti 0:9e645e6ed2ce 401
Deepti 0:9e645e6ed2ce 402 /**
Deepti 0:9e645e6ed2ce 403 * @}
Deepti 0:9e645e6ed2ce 404 */
Deepti 0:9e645e6ed2ce 405
Deepti 0:9e645e6ed2ce 406 /**
Deepti 0:9e645e6ed2ce 407 * @}
Deepti 0:9e645e6ed2ce 408 */
Deepti 0:9e645e6ed2ce 409
Deepti 0:9e645e6ed2ce 410 /**
Deepti 0:9e645e6ed2ce 411 * @}
Deepti 0:9e645e6ed2ce 412 */
Deepti 0:9e645e6ed2ce 413
Deepti 0:9e645e6ed2ce 414 /**
Deepti 0:9e645e6ed2ce 415 * @}
Deepti 0:9e645e6ed2ce 416 */
Deepti 0:9e645e6ed2ce 417
Deepti 0:9e645e6ed2ce 418
Deepti 0:9e645e6ed2ce 419 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
Deepti 0:9e645e6ed2ce 420