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577 lines
16 KiB
C
577 lines
16 KiB
C
/**
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******************************************************************************
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* @file hts221.c
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* @author MEMS Application Team
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* @version V1.2.0
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* @date 11-February-2015
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* @brief This file provides a set of functions needed to manage the hts221.
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******************************************************************************
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* UNPUBLISHED PROPRIETARY SOURCE CODE
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* Copyright (c) 2016 MXCHIP Inc.
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*
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* The contents of this file may not be disclosed to third parties, copied or
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* duplicated in any form, in whole or in part, without the prior written
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* permission of MXCHIP Corporation.
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "hts221.h"
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#include "mico.h"
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#include <math.h>
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#define hts221_log(M, ...) custom_log("HTS221", M, ##__VA_ARGS__)
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#define hts221_log_trace() custom_log_trace("HTS221")
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static HUM_TEMP_StatusTypeDef HTS221_Init(HUM_TEMP_InitTypeDef *HTS221_Init);
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static HUM_TEMP_StatusTypeDef HTS221_Power_OFF(void);
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static HUM_TEMP_StatusTypeDef HTS221_ReadID(uint8_t *ht_id);
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static HUM_TEMP_StatusTypeDef HTS221_RebootCmd(void);
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static HUM_TEMP_StatusTypeDef HTS221_GetHumidity(float* pfData);
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static HUM_TEMP_StatusTypeDef HTS221_GetTemperature(float* pfData);
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/* I2C device */
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mico_i2c_device_t hts221_i2c_device = {
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HTS221_I2C_PORT, 0x5F, I2C_ADDRESS_WIDTH_7BIT, I2C_STANDARD_SPEED_MODE
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};
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HUM_TEMP_StatusTypeDef HTS221_IO_Init(void)
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{
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// I2C init
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MicoI2cFinalize(&hts221_i2c_device); // in case error
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MicoI2cInitialize(&hts221_i2c_device);
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if( false == MicoI2cProbeDevice(&hts221_i2c_device, 5) ){
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hts221_log("HTS221_ERROR: no i2c device found!");
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return HUM_TEMP_ERROR;
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}
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return HUM_TEMP_OK;
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}
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/* \Brief: The function is used as I2C bus write
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* \Return : Status of the I2C write
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* \param dev_addr : The device address of the sensor
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* \param reg_addr : Address of the first register, will data is going to be written
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* \param reg_data : It is a value hold in the array,
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* will be used for write the value into the register
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* \param cnt : The no of byte of data to be write
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*/
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HUM_TEMP_StatusTypeDef HTS221_IO_Write(uint8_t* pBuffer, uint8_t DeviceAddr, uint8_t RegisterAddr, uint16_t NumByteToWrite)
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{
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mico_i2c_message_t hts221_i2c_msg = {NULL, NULL, 0, 0, 0, false};
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int iError = 0;
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uint8_t array[8];
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uint8_t stringpos;
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array[0] = RegisterAddr;
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for (stringpos = 0; stringpos < NumByteToWrite; stringpos++) {
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array[stringpos + 1] = *(pBuffer + stringpos);
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}
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iError = MicoI2cBuildTxMessage(&hts221_i2c_msg, array, NumByteToWrite + 1, 3);
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iError = MicoI2cTransfer(&hts221_i2c_device, &hts221_i2c_msg, 1);
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if(0 != iError){
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iError = HUM_TEMP_ERROR;
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}
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return (HUM_TEMP_StatusTypeDef)iError;
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}
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/* \Brief: The function is used as I2C bus read
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* \Return : Status of the I2C read
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* \param dev_addr : The device address of the sensor
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* \param reg_addr : Address of the first register, will data is going to be read
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* \param reg_data : This data read from the sensor, which is hold in an array
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* \param cnt : The no of byte of data to be read
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*/
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HUM_TEMP_StatusTypeDef HTS221_IO_Read(uint8_t* pBuffer, uint8_t DeviceAddr, uint8_t RegisterAddr, uint16_t NumByteToRead)
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{
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mico_i2c_message_t hts221_i2c_msg = {NULL, NULL, 0, 0, 0, false};
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int iError = 0;
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uint8_t array[8] = {0};
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array[0] = RegisterAddr;
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iError = MicoI2cBuildCombinedMessage(&hts221_i2c_msg, array, pBuffer, 1, NumByteToRead, 3);
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if(0 != iError){
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return HUM_TEMP_ERROR;
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}
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iError = MicoI2cTransfer(&hts221_i2c_device, &hts221_i2c_msg, 1);
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if(0 != iError){
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return HUM_TEMP_ERROR;
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}
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return (HUM_TEMP_StatusTypeDef)iError;
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}
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HUM_TEMP_DrvTypeDef Hts221Drv =
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{
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HTS221_Init,
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HTS221_Power_OFF,
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HTS221_ReadID,
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HTS221_RebootCmd,
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0,
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0,
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0,
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0,
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0,
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HTS221_GetHumidity,
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HTS221_GetTemperature,
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NULL
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};
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/* ------------------------------------------------------- */
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/* Here you should declare the variable that implements */
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/* the internal struct of extended features of HTS221. */
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/* Then you must update the NULL pointer in the variable */
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/* of the extended features below. */
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/* See the example of LSM6DS3 in lsm6ds3.c */
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/* ------------------------------------------------------- */
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HUM_TEMP_DrvExtTypeDef Hts221Drv_ext = {
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HUM_TEMP_HTS221_COMPONENT, /* unique ID for HTS221 in the humidity and temperature driver class */
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NULL /* pointer to internal struct of extended features of HTS221 */
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};
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/* Temperature in degree for calibration */
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float T0_degC, T1_degC;
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/* Output temperature value for calibration */
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int16_t T0_out, T1_out;
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/* Humidity for calibration */
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float H0_rh, H1_rh;
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/* Output Humidity value for calibration */
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int16_t H0_T0_out, H1_T0_out;
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static HUM_TEMP_StatusTypeDef HTS221_Power_On(void);
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static HUM_TEMP_StatusTypeDef HTS221_Calibration(void);
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/**
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* @brief HTS221 Calibration procedure
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* @param None
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* @retval HUM_TEMP_OK in case of success, an error code otherwise
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*/
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static HUM_TEMP_StatusTypeDef HTS221_Calibration(void)
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{
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/* Temperature Calibration */
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/* Temperature in degree for calibration ( "/8" to obtain float) */
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uint16_t T0_degC_x8_L, T0_degC_x8_H, T1_degC_x8_L, T1_degC_x8_H;
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uint8_t H0_rh_x2, H1_rh_x2;
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uint8_t tempReg[2] = {0,0};
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if(HTS221_IO_Read(tempReg, HTS221_ADDRESS, HTS221_T0_degC_X8_ADDR, 1) != HUM_TEMP_OK)
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{
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return HUM_TEMP_ERROR;
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}
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T0_degC_x8_L = (uint16_t)tempReg[0];
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if(HTS221_IO_Read(tempReg, HTS221_ADDRESS, HTS221_T1_T0_MSB_X8_ADDR, 1) != HUM_TEMP_OK)
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{
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return HUM_TEMP_ERROR;
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}
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T0_degC_x8_H = (uint16_t) (tempReg[0] & 0x03);
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T0_degC = ((float)((T0_degC_x8_H<<8) | (T0_degC_x8_L)))/8;
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if(HTS221_IO_Read(tempReg, HTS221_ADDRESS, HTS221_T1_degC_X8_ADDR, 1) != HUM_TEMP_OK)
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{
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return HUM_TEMP_ERROR;
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}
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T1_degC_x8_L = (uint16_t)tempReg[0];
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if(HTS221_IO_Read(tempReg, HTS221_ADDRESS, HTS221_T1_T0_MSB_X8_ADDR, 1) != HUM_TEMP_OK)
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{
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return HUM_TEMP_ERROR;
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}
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T1_degC_x8_H = (uint16_t) (tempReg[0] & 0x0C);
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T1_degC_x8_H = T1_degC_x8_H >> 2;
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T1_degC = ((float)((T1_degC_x8_H<<8) | (T1_degC_x8_L)))/8;
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if(HTS221_IO_Read(tempReg, HTS221_ADDRESS, (HTS221_T0_OUT_L_ADDR | HTS221_I2C_MULTIPLEBYTE_CMD), 2) != HUM_TEMP_OK)
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{
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return HUM_TEMP_ERROR;
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}
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T0_out = ((((int16_t)tempReg[1]) << 8)+(int16_t)tempReg[0]);
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if(HTS221_IO_Read(tempReg, HTS221_ADDRESS, (HTS221_T1_OUT_L_ADDR | HTS221_I2C_MULTIPLEBYTE_CMD), 2) != HUM_TEMP_OK)
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{
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return HUM_TEMP_ERROR;
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}
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T1_out = ((((int16_t)tempReg[1]) << 8)+(int16_t)tempReg[0]);
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/* Humidity Calibration */
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/* Humidity in degree for calibration ( "/2" to obtain float) */
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if(HTS221_IO_Read(&H0_rh_x2, HTS221_ADDRESS, HTS221_H0_RH_X2_ADDR, 1) != HUM_TEMP_OK)
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{
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return HUM_TEMP_ERROR;
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}
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if(HTS221_IO_Read(&H1_rh_x2, HTS221_ADDRESS, HTS221_H1_RH_X2_ADDR, 1) != HUM_TEMP_OK)
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{
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return HUM_TEMP_ERROR;
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}
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if(HTS221_IO_Read(&tempReg[0], HTS221_ADDRESS, (HTS221_H0_T0_OUT_L_ADDR | HTS221_I2C_MULTIPLEBYTE_CMD), 2) != HUM_TEMP_OK)
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{
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return HUM_TEMP_ERROR;
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}
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H0_T0_out = ((((int16_t)tempReg[1]) << 8)+(int16_t)tempReg[0]);
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if(HTS221_IO_Read(&tempReg[0], HTS221_ADDRESS, (HTS221_H1_T0_OUT_L_ADDR | HTS221_I2C_MULTIPLEBYTE_CMD), 2) != HUM_TEMP_OK)
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{
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return HUM_TEMP_ERROR;
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}
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H1_T0_out = ((((int16_t)tempReg[1]) << 8)+(int16_t)tempReg[0]);
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H0_rh = ((float)H0_rh_x2)/2;
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H1_rh = ((float)H1_rh_x2)/2;
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return HUM_TEMP_OK;
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}
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/**
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* @brief Set HTS221 Initialization
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* @param HTS221_Init the configuration setting for the HTS221
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* @retval HUM_TEMP_OK in case of success, an error code otherwise
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*/
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static HUM_TEMP_StatusTypeDef HTS221_Init(HUM_TEMP_InitTypeDef *HTS221_Init)
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{
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uint8_t tmp = 0x00;
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/* Configure the low level interface ---------------------------------------*/
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if(HTS221_IO_Init() != HUM_TEMP_OK)
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{
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return HUM_TEMP_ERROR;
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}
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if(HTS221_Power_On() != HUM_TEMP_OK)
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{
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return HUM_TEMP_ERROR;
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}
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if(HTS221_Calibration() != HUM_TEMP_OK)
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{
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return HUM_TEMP_ERROR;
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}
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////////////////////////////////////////////////////////////////////////////////
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if(HTS221_IO_Read(&tmp, HTS221_ADDRESS, HTS221_RES_CONF_ADDR, 1) != HUM_TEMP_OK)
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{
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return HUM_TEMP_ERROR;
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}
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/* Resolution Register */
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tmp &= ~(HTS221_H_RES_MASK);
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tmp |= HTS221_Init->Humidity_Resolutin;
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tmp &= ~(HTS221_T_RES_MASK);
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tmp |= HTS221_Init->Temperature_Resolution;
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if(HTS221_IO_Write(&tmp, HTS221_ADDRESS, HTS221_RES_CONF_ADDR, 1) != HUM_TEMP_OK)
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{
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return HUM_TEMP_ERROR;
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}
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//////////////////////////////////////////////////////////////////////////////////
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if(HTS221_IO_Read(&tmp, HTS221_ADDRESS, HTS221_CTRL_REG1_ADDR, 1) != HUM_TEMP_OK)
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{
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return HUM_TEMP_ERROR;
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}
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/* Output Data Rate selection */
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tmp &= ~(HTS221_ODR_MASK);
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tmp |= HTS221_Init->OutputDataRate;
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if(HTS221_IO_Write(&tmp, HTS221_ADDRESS, HTS221_CTRL_REG1_ADDR, 1) != HUM_TEMP_OK)
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{
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return HUM_TEMP_ERROR;
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}
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return HUM_TEMP_OK;
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}
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/**
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* @brief Read ID address of HTS221
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* @param ht_id the pointer where the ID of the device is stored
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* @retval HUM_TEMP_OK in case of success, an error code otherwise
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*/
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static HUM_TEMP_StatusTypeDef HTS221_ReadID(uint8_t *ht_id)
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{
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if(!ht_id)
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{
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return HUM_TEMP_ERROR;
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}
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return HTS221_IO_Read(ht_id, HTS221_ADDRESS, HTS221_WHO_AM_I_ADDR, 1);
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}
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/**
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* @brief Reboot memory content of HTS221
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* @param None
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* @retval HUM_TEMP_OK in case of success, an error code otherwise
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*/
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static HUM_TEMP_StatusTypeDef HTS221_RebootCmd(void)
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{
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uint8_t tmpreg;
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/* Read CTRL_REG2 register */
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if(HTS221_IO_Read(&tmpreg, HTS221_ADDRESS, HTS221_CTRL_REG2_ADDR, 1) != HUM_TEMP_OK)
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{
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return HUM_TEMP_ERROR;
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}
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/* Enable or Disable the reboot memory */
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tmpreg |= HTS221_BOOT_REBOOTMEMORY;
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/* Write value to MEMS CTRL_REG2 regsister */
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if(HTS221_IO_Write(&tmpreg, HTS221_ADDRESS, HTS221_CTRL_REG2_ADDR, 1) != HUM_TEMP_OK)
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{
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return HUM_TEMP_ERROR;
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}
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return HUM_TEMP_OK;
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}
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/**
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* @brief Read HTS221 output register, and calculate the humidity
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* @param pfData the pointer to data output
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* @retval HUM_TEMP_OK in case of success, an error code otherwise
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*/
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static HUM_TEMP_StatusTypeDef HTS221_GetHumidity(float* pfData)
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{
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int16_t H_T_out, humidity_t;
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uint8_t tempReg[2] = {0,0};
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uint8_t tmp = 0x00;
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float H_rh;
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if(HTS221_IO_Read(&tmp, HTS221_ADDRESS, HTS221_CTRL_REG1_ADDR, 1) != HUM_TEMP_OK)
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{
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return HUM_TEMP_ERROR;
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}
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/* Output Data Rate selection */
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tmp &= (HTS221_ODR_MASK);
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if(tmp == 0x00)
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{
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if(HTS221_IO_Read(&tmp, HTS221_ADDRESS, HTS221_CTRL_REG2_ADDR, 1) != HUM_TEMP_OK)
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{
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return HUM_TEMP_ERROR;
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}
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/* Serial Interface Mode selection */
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tmp &= ~(HTS221_ONE_SHOT_MASK);
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tmp |= HTS221_ONE_SHOT_START;
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if(HTS221_IO_Write(&tmp, HTS221_ADDRESS, HTS221_CTRL_REG2_ADDR, 1) != HUM_TEMP_OK)
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{
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return HUM_TEMP_ERROR;
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}
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do{
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if(HTS221_IO_Read(&tmp, HTS221_ADDRESS, HTS221_STATUS_REG_ADDR, 1) != HUM_TEMP_OK)
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{
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return HUM_TEMP_ERROR;
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}
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}while(!(tmp&&0x02));
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}
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if(HTS221_IO_Read(&tempReg[0], HTS221_ADDRESS, (HTS221_HUMIDITY_OUT_L_ADDR | HTS221_I2C_MULTIPLEBYTE_CMD), 2) != HUM_TEMP_OK)
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{
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return HUM_TEMP_ERROR;
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}
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H_T_out = ((((int16_t)tempReg[1]) << 8)+(int16_t)tempReg[0]);
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H_rh = ( float )(((( H_T_out - H0_T0_out ) * ( H1_rh - H0_rh )) / ( H1_T0_out - H0_T0_out )) + H0_rh );
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// Truncate to specific number of decimal digits
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humidity_t = (uint16_t)(H_rh * pow(10,HUM_DECIMAL_DIGITS));
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*pfData = ((float)humidity_t)/pow(10,HUM_DECIMAL_DIGITS);
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// Prevent data going below 0% and above 100% due to linear interpolation
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if ( *pfData < 0.0f ) *pfData = 0.0f;
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if ( *pfData > 100.0f ) *pfData = 100.0f;
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return HUM_TEMP_OK;
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}
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/**
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* @brief Read HTS221 output register, and calculate the temperature
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* @param pfData the pointer to data output
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* @retval HUM_TEMP_OK in case of success, an error code otherwise
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*/
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static HUM_TEMP_StatusTypeDef HTS221_GetTemperature(float* pfData)
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{
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int16_t T_out, temperature_t;
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uint8_t tempReg[2] = {0,0};
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uint8_t tmp = 0x00;
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float T_degC;
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if(HTS221_IO_Read(&tmp, HTS221_ADDRESS, HTS221_CTRL_REG1_ADDR, 1) != HUM_TEMP_OK)
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{
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return HUM_TEMP_ERROR;
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}
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/* Output Data Rate selection */
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tmp &= (HTS221_ODR_MASK);
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if(tmp == 0x00)
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{
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if(HTS221_IO_Read(&tmp, HTS221_ADDRESS, HTS221_CTRL_REG2_ADDR, 1) != HUM_TEMP_OK)
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{
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return HUM_TEMP_ERROR;
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}
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/* Serial Interface Mode selection */
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tmp &= ~(HTS221_ONE_SHOT_MASK);
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tmp |= HTS221_ONE_SHOT_START;
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if(HTS221_IO_Write(&tmp, HTS221_ADDRESS, HTS221_CTRL_REG2_ADDR, 1) != HUM_TEMP_OK)
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{
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return HUM_TEMP_ERROR;
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}
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do{
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if(HTS221_IO_Read(&tmp, HTS221_ADDRESS, HTS221_STATUS_REG_ADDR, 1) != HUM_TEMP_OK)
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{
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return HUM_TEMP_ERROR;
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}
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|
|
}while(!(tmp&&0x01));
|
|
}
|
|
|
|
if(HTS221_IO_Read(&tempReg[0], HTS221_ADDRESS, (HTS221_TEMP_OUT_L_ADDR | HTS221_I2C_MULTIPLEBYTE_CMD), 2) != HUM_TEMP_OK)
|
|
{
|
|
return HUM_TEMP_ERROR;
|
|
}
|
|
|
|
T_out = ((((int16_t)tempReg[1]) << 8)+(int16_t)tempReg[0]);
|
|
|
|
T_degC = ((float)(T_out - T0_out))/(T1_out - T0_out) * (T1_degC - T0_degC) + T0_degC;
|
|
|
|
temperature_t = (int16_t)(T_degC * pow(10,TEMP_DECIMAL_DIGITS));
|
|
|
|
*pfData = ((float)temperature_t)/pow(10,TEMP_DECIMAL_DIGITS);
|
|
|
|
return HUM_TEMP_OK;
|
|
}
|
|
|
|
|
|
/**
|
|
* @brief Exit the shutdown mode for HTS221
|
|
* @param None
|
|
* @retval HUM_TEMP_OK in case of success, an error code otherwise
|
|
*/
|
|
static HUM_TEMP_StatusTypeDef HTS221_Power_On(void)
|
|
{
|
|
uint8_t tmpReg;
|
|
|
|
/* Read the register content */
|
|
if(HTS221_IO_Read(&tmpReg, HTS221_ADDRESS, HTS221_CTRL_REG1_ADDR, 1) != HUM_TEMP_OK)
|
|
{
|
|
return HUM_TEMP_ERROR;
|
|
}
|
|
|
|
/* Set the power down bit */
|
|
tmpReg |= HTS221_MODE_ACTIVE;
|
|
|
|
/* Write register */
|
|
if(HTS221_IO_Write(&tmpReg, HTS221_ADDRESS, HTS221_CTRL_REG1_ADDR, 1) != HUM_TEMP_OK)
|
|
{
|
|
return HUM_TEMP_ERROR;
|
|
}
|
|
|
|
return HUM_TEMP_OK;
|
|
}
|
|
|
|
/**
|
|
* @brief Enter the shutdown mode for HTS221
|
|
* @param None
|
|
* @retval HUM_TEMP_OK in case of success, an error code otherwise
|
|
*/
|
|
static HUM_TEMP_StatusTypeDef HTS221_Power_OFF(void)
|
|
{
|
|
uint8_t tmpReg;
|
|
|
|
/* Read the register content */
|
|
if(HTS221_IO_Read(&tmpReg, HTS221_ADDRESS, HTS221_CTRL_REG1_ADDR, 1) != HUM_TEMP_OK)
|
|
{
|
|
return HUM_TEMP_ERROR;
|
|
}
|
|
|
|
/* Reset the power down bit */
|
|
tmpReg &= ~(HTS221_MODE_ACTIVE);
|
|
|
|
/* Write register */
|
|
if(HTS221_IO_Write(&tmpReg, HTS221_ADDRESS, HTS221_CTRL_REG1_ADDR, 1) != HUM_TEMP_OK)
|
|
{
|
|
return HUM_TEMP_ERROR;
|
|
}
|
|
|
|
return HUM_TEMP_OK;
|
|
}
|
|
|
|
|
|
|
|
OSStatus hts221_sensor_init(void)
|
|
{
|
|
HUM_TEMP_InitTypeDef hts221;
|
|
hts221.Data_Update_Mode = HTS221_BDU_CONTINUOUS;
|
|
hts221.Humidity_Resolutin = HTS221_H_RES_AVG_32;
|
|
hts221.Temperature_Resolution = HTS221_H_RES_AVG_32;
|
|
hts221.OutputDataRate = HTS221_ODR_ONE_SHOT;
|
|
hts221.Power_Mode = HTS221_MODE_ACTIVE;
|
|
hts221.Reboot_Mode = HTS221_BOOT_NORMALMODE;
|
|
|
|
if(HTS221_Init(&hts221) != HUM_TEMP_OK){
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
OSStatus hts221_Read_Data(float *temperature,float *humidity)
|
|
{
|
|
if(HTS221_GetTemperature(temperature) != HUM_TEMP_OK){
|
|
return -1;
|
|
}
|
|
if(HTS221_GetHumidity(humidity) != HUM_TEMP_OK){
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
OSStatus hts221_sensor_deinit(void)
|
|
{
|
|
if(HTS221_Power_OFF() != HUM_TEMP_OK){
|
|
return -1;
|
|
}
|
|
if(MicoI2cFinalize(&hts221_i2c_device) != HUM_TEMP_OK){
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
|