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esp-airsensor/components/bme680/include/bme68x_defs.h

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/**
* Copyright (c) 2021 Bosch Sensortec GmbH. All rights reserved.
*
* BSD-3-Clause
*
* 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 the copyright holder 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.
*
* @file bme68x_defs.h
* @date 2021-11-09
* @version v4.4.7
*
*/
/*! @cond DOXYGEN_SUPRESS */
#ifndef BME68X_DEFS_H_
#define BME68X_DEFS_H_
/********************************************************* */
/*! Header includes */
/********************************************************* */
#ifdef __KERNEL__
#include <linux/types.h>
#include <linux/kernel.h>
#else
#include <stdint.h>
#include <stddef.h>
#endif
/********************************************************* */
/*! Common Macros */
/********************************************************* */
#ifdef __KERNEL__
#if !defined(UINT8_C) && !defined(INT8_C)
#define INT8_C(x) S8_C(x)
#define UINT8_C(x) U8_C(x)
#endif
#if !defined(UINT16_C) && !defined(INT16_C)
#define INT16_C(x) S16_C(x)
#define UINT16_C(x) U16_C(x)
#endif
#if !defined(INT32_C) && !defined(UINT32_C)
#define INT32_C(x) S32_C(x)
#define UINT32_C(x) U32_C(x)
#endif
#if !defined(INT64_C) && !defined(UINT64_C)
#define INT64_C(x) S64_C(x)
#define UINT64_C(x) U64_C(x)
#endif
#endif
/*! C standard macros */
#ifndef NULL
#ifdef __cplusplus
#define NULL 0
#else
#define NULL ((void *) 0)
#endif
#endif
#ifndef BME68X_DO_NOT_USE_FPU
/* Comment or un-comment the macro to provide floating point data output */
#define BME68X_USE_FPU
#endif
/* Period between two polls (value can be given by user) */
#ifndef BME68X_PERIOD_POLL
#define BME68X_PERIOD_POLL UINT32_C(10000)
#endif
/* BME68X unique chip identifier */
#define BME68X_CHIP_ID UINT8_C(0x61)
/* Period for a soft reset */
#define BME68X_PERIOD_RESET UINT32_C(10000)
/* BME68X lower I2C address */
#define BME68X_I2C_ADDR_LOW UINT8_C(0x76)
/* BME68X higher I2C address */
#define BME68X_I2C_ADDR_HIGH UINT8_C(0x77)
/* Soft reset command */
#define BME68X_SOFT_RESET_CMD UINT8_C(0xb6)
/* Return code definitions */
/* Success */
#define BME68X_OK INT8_C(0)
/* Errors */
/* Null pointer passed */
#define BME68X_E_NULL_PTR INT8_C(-1)
/* Communication failure */
#define BME68X_E_COM_FAIL INT8_C(-2)
/* Sensor not found */
#define BME68X_E_DEV_NOT_FOUND INT8_C(-3)
/* Incorrect length parameter */
#define BME68X_E_INVALID_LENGTH INT8_C(-4)
/* Self test fail error */
#define BME68X_E_SELF_TEST INT8_C(-5)
/* Warnings */
/* Define a valid operation mode */
#define BME68X_W_DEFINE_OP_MODE INT8_C(1)
/* No new data was found */
#define BME68X_W_NO_NEW_DATA INT8_C(2)
/* Define the shared heating duration */
#define BME68X_W_DEFINE_SHD_HEATR_DUR INT8_C(3)
/* Information - only available via bme68x_dev.info_msg */
#define BME68X_I_PARAM_CORR UINT8_C(1)
/* Register map addresses in I2C */
/* Register for 3rd group of coefficients */
#define BME68X_REG_COEFF3 UINT8_C(0x00)
/* 0th Field address*/
#define BME68X_REG_FIELD0 UINT8_C(0x1d)
/* 0th Current DAC address*/
#define BME68X_REG_IDAC_HEAT0 UINT8_C(0x50)
/* 0th Res heat address */
#define BME68X_REG_RES_HEAT0 UINT8_C(0x5a)
/* 0th Gas wait address */
#define BME68X_REG_GAS_WAIT0 UINT8_C(0x64)
/* Shared heating duration address */
#define BME68X_REG_SHD_HEATR_DUR UINT8_C(0x6E)
/* CTRL_GAS_0 address */
#define BME68X_REG_CTRL_GAS_0 UINT8_C(0x70)
/* CTRL_GAS_1 address */
#define BME68X_REG_CTRL_GAS_1 UINT8_C(0x71)
/* CTRL_HUM address */
#define BME68X_REG_CTRL_HUM UINT8_C(0x72)
/* CTRL_MEAS address */
#define BME68X_REG_CTRL_MEAS UINT8_C(0x74)
/* CONFIG address */
#define BME68X_REG_CONFIG UINT8_C(0x75)
/* MEM_PAGE address */
#define BME68X_REG_MEM_PAGE UINT8_C(0xf3)
/* Unique ID address */
#define BME68X_REG_UNIQUE_ID UINT8_C(0x83)
/* Register for 1st group of coefficients */
#define BME68X_REG_COEFF1 UINT8_C(0x8a)
/* Chip ID address */
#define BME68X_REG_CHIP_ID UINT8_C(0xd0)
/* Soft reset address */
#define BME68X_REG_SOFT_RESET UINT8_C(0xe0)
/* Register for 2nd group of coefficients */
#define BME68X_REG_COEFF2 UINT8_C(0xe1)
/* Variant ID Register */
#define BME68X_REG_VARIANT_ID UINT8_C(0xF0)
/* Enable/Disable macros */
/* Enable */
#define BME68X_ENABLE UINT8_C(0x01)
/* Disable */
#define BME68X_DISABLE UINT8_C(0x00)
/* Variant ID macros */
/* Low Gas variant */
#define BME68X_VARIANT_GAS_LOW UINT8_C(0x00)
/* High Gas variant */
#define BME68X_VARIANT_GAS_HIGH UINT8_C(0x01)
/* Oversampling setting macros */
/* Switch off measurement */
#define BME68X_OS_NONE UINT8_C(0)
/* Perform 1 measurement */
#define BME68X_OS_1X UINT8_C(1)
/* Perform 2 measurements */
#define BME68X_OS_2X UINT8_C(2)
/* Perform 4 measurements */
#define BME68X_OS_4X UINT8_C(3)
/* Perform 8 measurements */
#define BME68X_OS_8X UINT8_C(4)
/* Perform 16 measurements */
#define BME68X_OS_16X UINT8_C(5)
/* IIR Filter settings */
/* Switch off the filter */
#define BME68X_FILTER_OFF UINT8_C(0)
/* Filter coefficient of 2 */
#define BME68X_FILTER_SIZE_1 UINT8_C(1)
/* Filter coefficient of 4 */
#define BME68X_FILTER_SIZE_3 UINT8_C(2)
/* Filter coefficient of 8 */
#define BME68X_FILTER_SIZE_7 UINT8_C(3)
/* Filter coefficient of 16 */
#define BME68X_FILTER_SIZE_15 UINT8_C(4)
/* Filter coefficient of 32 */
#define BME68X_FILTER_SIZE_31 UINT8_C(5)
/* Filter coefficient of 64 */
#define BME68X_FILTER_SIZE_63 UINT8_C(6)
/* Filter coefficient of 128 */
#define BME68X_FILTER_SIZE_127 UINT8_C(7)
/* ODR/Standby time macros */
/* Standby time of 0.59ms */
#define BME68X_ODR_0_59_MS UINT8_C(0)
/* Standby time of 62.5ms */
#define BME68X_ODR_62_5_MS UINT8_C(1)
/* Standby time of 125ms */
#define BME68X_ODR_125_MS UINT8_C(2)
/* Standby time of 250ms */
#define BME68X_ODR_250_MS UINT8_C(3)
/* Standby time of 500ms */
#define BME68X_ODR_500_MS UINT8_C(4)
/* Standby time of 1s */
#define BME68X_ODR_1000_MS UINT8_C(5)
/* Standby time of 10ms */
#define BME68X_ODR_10_MS UINT8_C(6)
/* Standby time of 20ms */
#define BME68X_ODR_20_MS UINT8_C(7)
/* No standby time */
#define BME68X_ODR_NONE UINT8_C(8)
/* Operating mode macros */
/* Sleep operation mode */
#define BME68X_SLEEP_MODE UINT8_C(0)
/* Forced operation mode */
#define BME68X_FORCED_MODE UINT8_C(1)
/* Parallel operation mode */
#define BME68X_PARALLEL_MODE UINT8_C(2)
/* Sequential operation mode */
#define BME68X_SEQUENTIAL_MODE UINT8_C(3)
/* SPI page macros */
/* SPI memory page 0 */
#define BME68X_MEM_PAGE0 UINT8_C(0x10)
/* SPI memory page 1 */
#define BME68X_MEM_PAGE1 UINT8_C(0x00)
/* Coefficient index macros */
/* Length for all coefficients */
#define BME68X_LEN_COEFF_ALL UINT8_C(42)
/* Length for 1st group of coefficients */
#define BME68X_LEN_COEFF1 UINT8_C(23)
/* Length for 2nd group of coefficients */
#define BME68X_LEN_COEFF2 UINT8_C(14)
/* Length for 3rd group of coefficients */
#define BME68X_LEN_COEFF3 UINT8_C(5)
/* Length of the field */
#define BME68X_LEN_FIELD UINT8_C(17)
/* Length between two fields */
#define BME68X_LEN_FIELD_OFFSET UINT8_C(17)
/* Length of the configuration register */
#define BME68X_LEN_CONFIG UINT8_C(5)
/* Length of the interleaved buffer */
#define BME68X_LEN_INTERLEAVE_BUFF UINT8_C(20)
/* Coefficient index macros */
/* Coefficient T2 LSB position */
#define BME68X_IDX_T2_LSB (0)
/* Coefficient T2 MSB position */
#define BME68X_IDX_T2_MSB (1)
/* Coefficient T3 position */
#define BME68X_IDX_T3 (2)
/* Coefficient P1 LSB position */
#define BME68X_IDX_P1_LSB (4)
/* Coefficient P1 MSB position */
#define BME68X_IDX_P1_MSB (5)
/* Coefficient P2 LSB position */
#define BME68X_IDX_P2_LSB (6)
/* Coefficient P2 MSB position */
#define BME68X_IDX_P2_MSB (7)
/* Coefficient P3 position */
#define BME68X_IDX_P3 (8)
/* Coefficient P4 LSB position */
#define BME68X_IDX_P4_LSB (10)
/* Coefficient P4 MSB position */
#define BME68X_IDX_P4_MSB (11)
/* Coefficient P5 LSB position */
#define BME68X_IDX_P5_LSB (12)
/* Coefficient P5 MSB position */
#define BME68X_IDX_P5_MSB (13)
/* Coefficient P7 position */
#define BME68X_IDX_P7 (14)
/* Coefficient P6 position */
#define BME68X_IDX_P6 (15)
/* Coefficient P8 LSB position */
#define BME68X_IDX_P8_LSB (18)
/* Coefficient P8 MSB position */
#define BME68X_IDX_P8_MSB (19)
/* Coefficient P9 LSB position */
#define BME68X_IDX_P9_LSB (20)
/* Coefficient P9 MSB position */
#define BME68X_IDX_P9_MSB (21)
/* Coefficient P10 position */
#define BME68X_IDX_P10 (22)
/* Coefficient H2 MSB position */
#define BME68X_IDX_H2_MSB (23)
/* Coefficient H2 LSB position */
#define BME68X_IDX_H2_LSB (24)
/* Coefficient H1 LSB position */
#define BME68X_IDX_H1_LSB (24)
/* Coefficient H1 MSB position */
#define BME68X_IDX_H1_MSB (25)
/* Coefficient H3 position */
#define BME68X_IDX_H3 (26)
/* Coefficient H4 position */
#define BME68X_IDX_H4 (27)
/* Coefficient H5 position */
#define BME68X_IDX_H5 (28)
/* Coefficient H6 position */
#define BME68X_IDX_H6 (29)
/* Coefficient H7 position */
#define BME68X_IDX_H7 (30)
/* Coefficient T1 LSB position */
#define BME68X_IDX_T1_LSB (31)
/* Coefficient T1 MSB position */
#define BME68X_IDX_T1_MSB (32)
/* Coefficient GH2 LSB position */
#define BME68X_IDX_GH2_LSB (33)
/* Coefficient GH2 MSB position */
#define BME68X_IDX_GH2_MSB (34)
/* Coefficient GH1 position */
#define BME68X_IDX_GH1 (35)
/* Coefficient GH3 position */
#define BME68X_IDX_GH3 (36)
/* Coefficient res heat value position */
#define BME68X_IDX_RES_HEAT_VAL (37)
/* Coefficient res heat range position */
#define BME68X_IDX_RES_HEAT_RANGE (39)
/* Coefficient range switching error position */
#define BME68X_IDX_RANGE_SW_ERR (41)
/* Gas measurement macros */
/* Disable gas measurement */
#define BME68X_DISABLE_GAS_MEAS UINT8_C(0x00)
/* Enable gas measurement low */
#define BME68X_ENABLE_GAS_MEAS_L UINT8_C(0x01)
/* Enable gas measurement high */
#define BME68X_ENABLE_GAS_MEAS_H UINT8_C(0x02)
/* Heater control macros */
/* Enable heater */
#define BME68X_ENABLE_HEATER UINT8_C(0x00)
/* Disable heater */
#define BME68X_DISABLE_HEATER UINT8_C(0x01)
#ifdef BME68X_USE_FPU
/* 0 degree Celsius */
#define BME68X_MIN_TEMPERATURE INT16_C(0)
/* 60 degree Celsius */
#define BME68X_MAX_TEMPERATURE INT16_C(60)
/* 900 hecto Pascals */
#define BME68X_MIN_PRESSURE UINT32_C(90000)
/* 1100 hecto Pascals */
#define BME68X_MAX_PRESSURE UINT32_C(110000)
/* 20% relative humidity */
#define BME68X_MIN_HUMIDITY UINT32_C(20)
/* 80% relative humidity*/
#define BME68X_MAX_HUMIDITY UINT32_C(80)
#else
/* 0 degree Celsius */
#define BME68X_MIN_TEMPERATURE INT16_C(0)
/* 60 degree Celsius */
#define BME68X_MAX_TEMPERATURE INT16_C(6000)
/* 900 hecto Pascals */
#define BME68X_MIN_PRESSURE UINT32_C(90000)
/* 1100 hecto Pascals */
#define BME68X_MAX_PRESSURE UINT32_C(110000)
/* 20% relative humidity */
#define BME68X_MIN_HUMIDITY UINT32_C(20000)
/* 80% relative humidity*/
#define BME68X_MAX_HUMIDITY UINT32_C(80000)
#endif
#define BME68X_HEATR_DUR1 UINT16_C(1000)
#define BME68X_HEATR_DUR2 UINT16_C(2000)
#define BME68X_HEATR_DUR1_DELAY UINT32_C(1000000)
#define BME68X_HEATR_DUR2_DELAY UINT32_C(2000000)
#define BME68X_N_MEAS UINT8_C(6)
#define BME68X_LOW_TEMP UINT8_C(150)
#define BME68X_HIGH_TEMP UINT16_C(350)
/* Mask macros */
/* Mask for number of conversions */
#define BME68X_NBCONV_MSK UINT8_C(0X0f)
/* Mask for IIR filter */
#define BME68X_FILTER_MSK UINT8_C(0X1c)
/* Mask for ODR[3] */
#define BME68X_ODR3_MSK UINT8_C(0x80)
/* Mask for ODR[2:0] */
#define BME68X_ODR20_MSK UINT8_C(0xe0)
/* Mask for temperature oversampling */
#define BME68X_OST_MSK UINT8_C(0Xe0)
/* Mask for pressure oversampling */
#define BME68X_OSP_MSK UINT8_C(0X1c)
/* Mask for humidity oversampling */
#define BME68X_OSH_MSK UINT8_C(0X07)
/* Mask for heater control */
#define BME68X_HCTRL_MSK UINT8_C(0x08)
/* Mask for run gas */
#define BME68X_RUN_GAS_MSK UINT8_C(0x30)
/* Mask for operation mode */
#define BME68X_MODE_MSK UINT8_C(0x03)
/* Mask for res heat range */
#define BME68X_RHRANGE_MSK UINT8_C(0x30)
/* Mask for range switching error */
#define BME68X_RSERROR_MSK UINT8_C(0xf0)
/* Mask for new data */
#define BME68X_NEW_DATA_MSK UINT8_C(0x80)
/* Mask for gas index */
#define BME68X_GAS_INDEX_MSK UINT8_C(0x0f)
/* Mask for gas range */
#define BME68X_GAS_RANGE_MSK UINT8_C(0x0f)
/* Mask for gas measurement valid */
#define BME68X_GASM_VALID_MSK UINT8_C(0x20)
/* Mask for heater stability */
#define BME68X_HEAT_STAB_MSK UINT8_C(0x10)
/* Mask for SPI memory page */
#define BME68X_MEM_PAGE_MSK UINT8_C(0x10)
/* Mask for reading a register in SPI */
#define BME68X_SPI_RD_MSK UINT8_C(0x80)
/* Mask for writing a register in SPI */
#define BME68X_SPI_WR_MSK UINT8_C(0x7f)
/* Mask for the H1 calibration coefficient */
#define BME68X_BIT_H1_DATA_MSK UINT8_C(0x0f)
/* Position macros */
/* Filter bit position */
#define BME68X_FILTER_POS UINT8_C(2)
/* Temperature oversampling bit position */
#define BME68X_OST_POS UINT8_C(5)
/* Pressure oversampling bit position */
#define BME68X_OSP_POS UINT8_C(2)
/* ODR[3] bit position */
#define BME68X_ODR3_POS UINT8_C(7)
/* ODR[2:0] bit position */
#define BME68X_ODR20_POS UINT8_C(5)
/* Run gas bit position */
#define BME68X_RUN_GAS_POS UINT8_C(4)
/* Heater control bit position */
#define BME68X_HCTRL_POS UINT8_C(3)
/* Macro to combine two 8 bit data's to form a 16 bit data */
#define BME68X_CONCAT_BYTES(msb, lsb) (((uint16_t)msb << 8) | (uint16_t)lsb)
/* Macro to set bits */
#define BME68X_SET_BITS(reg_data, bitname, data) \
((reg_data & ~(bitname##_MSK)) | \
((data << bitname##_POS) & bitname##_MSK))
/* Macro to get bits */
#define BME68X_GET_BITS(reg_data, bitname) ((reg_data & (bitname##_MSK)) >> \
(bitname##_POS))
/* Macro to set bits starting from position 0 */
#define BME68X_SET_BITS_POS_0(reg_data, bitname, data) \
((reg_data & ~(bitname##_MSK)) | \
(data & bitname##_MSK))
/* Macro to get bits starting from position 0 */
#define BME68X_GET_BITS_POS_0(reg_data, bitname) (reg_data & (bitname##_MSK))
/**
* BME68X_INTF_RET_TYPE is the read/write interface return type which can be overwritten by the build system.
* The default is set to int8_t.
*/
#ifndef BME68X_INTF_RET_TYPE
#define BME68X_INTF_RET_TYPE int8_t
#endif
/**
* BME68X_INTF_RET_SUCCESS is the success return value read/write interface return type which can be
* overwritten by the build system. The default is set to 0. It is used to check for a successful
* execution of the read/write functions
*/
#ifndef BME68X_INTF_RET_SUCCESS
#define BME68X_INTF_RET_SUCCESS INT8_C(0)
#endif
/********************************************************* */
/*! Function Pointers */
/********************************************************* */
/*!
* @brief Bus communication function pointer which should be mapped to
* the platform specific read functions of the user
*
* @param[in] reg_addr : 8bit register address of the sensor
* @param[out] reg_data : Data from the specified address
* @param[in] length : Length of the reg_data array
* @param[in,out] intf_ptr : Void pointer that can enable the linking of descriptors
* for interface related callbacks
* @retval 0 for Success
* @retval Non-zero for Failure
*/
typedef BME68X_INTF_RET_TYPE (*bme68x_read_fptr_t)(uint8_t reg_addr, uint8_t *reg_data, uint32_t length,
void *intf_ptr);
/*!
* @brief Bus communication function pointer which should be mapped to
* the platform specific write functions of the user
*
* @param[in] reg_addr : 8bit register address of the sensor
* @param[out] reg_data : Data to the specified address
* @param[in] length : Length of the reg_data array
* @param[in,out] intf_ptr : Void pointer that can enable the linking of descriptors
* for interface related callbacks
* @retval 0 for Success
* @retval Non-zero for Failure
*
*/
typedef BME68X_INTF_RET_TYPE (*bme68x_write_fptr_t)(uint8_t reg_addr, const uint8_t *reg_data, uint32_t length,
void *intf_ptr);
/*!
* @brief Delay function pointer which should be mapped to
* delay function of the user
*
* @param period - The time period in microseconds
* @param[in,out] intf_ptr : Void pointer that can enable the linking of descriptors
* for interface related callbacks
*/
typedef void (*bme68x_delay_us_fptr_t)(uint32_t period, void *intf_ptr);
/*
* @brief Generic communication function pointer
* @param[in] dev_id: Place holder to store the id of the device structure
* Can be used to store the index of the Chip select or
* I2C address of the device.
* @param[in] reg_addr: Used to select the register the where data needs to
* be read from or written to.
* @param[in,out] reg_data: Data array to read/write
* @param[in] len: Length of the data array
*/
/*
* @brief Interface selection Enumerations
*/
enum bme68x_intf {
/*! SPI interface */
BME68X_SPI_INTF,
/*! I2C interface */
BME68X_I2C_INTF
};
/* Structure definitions */
/*
* @brief Sensor field data structure
*/
struct bme68x_data
{
/*! Contains new_data, gasm_valid & heat_stab */
uint8_t status;
/*! The index of the heater profile used */
uint8_t gas_index;
/*! Measurement index to track order */
uint8_t meas_index;
/*! Heater resistance */
uint8_t res_heat;
/*! Current DAC */
uint8_t idac;
/*! Gas wait period */
uint8_t gas_wait;
#ifndef BME68X_USE_FPU
/*! Temperature in degree celsius x100 */
int16_t temperature;
/*! Pressure in Pascal */
uint32_t pressure;
/*! Humidity in % relative humidity x1000 */
uint32_t humidity;
/*! Gas resistance in Ohms */
uint32_t gas_resistance;
#else
/*! Temperature in degree celsius */
float temperature;
/*! Pressure in Pascal */
float pressure;
/*! Humidity in % relative humidity x1000 */
float humidity;
/*! Gas resistance in Ohms */
float gas_resistance;
#endif
};
/*
* @brief Structure to hold the calibration coefficients
*/
struct bme68x_calib_data
{
/*! Calibration coefficient for the humidity sensor */
uint16_t par_h1;
/*! Calibration coefficient for the humidity sensor */
uint16_t par_h2;
/*! Calibration coefficient for the humidity sensor */
int8_t par_h3;
/*! Calibration coefficient for the humidity sensor */
int8_t par_h4;
/*! Calibration coefficient for the humidity sensor */
int8_t par_h5;
/*! Calibration coefficient for the humidity sensor */
uint8_t par_h6;
/*! Calibration coefficient for the humidity sensor */
int8_t par_h7;
/*! Calibration coefficient for the gas sensor */
int8_t par_gh1;
/*! Calibration coefficient for the gas sensor */
int16_t par_gh2;
/*! Calibration coefficient for the gas sensor */
int8_t par_gh3;
/*! Calibration coefficient for the temperature sensor */
uint16_t par_t1;
/*! Calibration coefficient for the temperature sensor */
int16_t par_t2;
/*! Calibration coefficient for the temperature sensor */
int8_t par_t3;
/*! Calibration coefficient for the pressure sensor */
uint16_t par_p1;
/*! Calibration coefficient for the pressure sensor */
int16_t par_p2;
/*! Calibration coefficient for the pressure sensor */
int8_t par_p3;
/*! Calibration coefficient for the pressure sensor */
int16_t par_p4;
/*! Calibration coefficient for the pressure sensor */
int16_t par_p5;
/*! Calibration coefficient for the pressure sensor */
int8_t par_p6;
/*! Calibration coefficient for the pressure sensor */
int8_t par_p7;
/*! Calibration coefficient for the pressure sensor */
int16_t par_p8;
/*! Calibration coefficient for the pressure sensor */
int16_t par_p9;
/*! Calibration coefficient for the pressure sensor */
uint8_t par_p10;
#ifndef BME68X_USE_FPU
/*! Variable to store the intermediate temperature coefficient */
int32_t t_fine;
#else
/*! Variable to store the intermediate temperature coefficient */
float t_fine;
#endif
/*! Heater resistance range coefficient */
uint8_t res_heat_range;
/*! Heater resistance value coefficient */
int8_t res_heat_val;
/*! Gas resistance range switching error coefficient */
int8_t range_sw_err;
};
/*
* @brief BME68X sensor settings structure which comprises of ODR,
* over-sampling and filter settings.
*/
struct bme68x_conf
{
/*! Humidity oversampling. Refer @ref osx*/
uint8_t os_hum;
/*! Temperature oversampling. Refer @ref osx */
uint8_t os_temp;
/*! Pressure oversampling. Refer @ref osx */
uint8_t os_pres;
/*! Filter coefficient. Refer @ref filter*/
uint8_t filter;
/*!
* Standby time between sequential mode measurement profiles.
* Refer @ref odr
*/
uint8_t odr;
};
/*
* @brief BME68X gas heater configuration
*/
struct bme68x_heatr_conf
{
/*! Enable gas measurement. Refer @ref en_dis */
uint8_t enable;
/*! Store the heater temperature for forced mode degree Celsius */
uint16_t heatr_temp;
/*! Store the heating duration for forced mode in milliseconds */
uint16_t heatr_dur;
/*! Store the heater temperature profile in degree Celsius */
uint16_t *heatr_temp_prof;
/*! Store the heating duration profile in milliseconds */
uint16_t *heatr_dur_prof;
/*! Variable to store the length of the heating profile */
uint8_t profile_len;
/*!
* Variable to store heating duration for parallel mode
* in milliseconds
*/
uint16_t shared_heatr_dur;
};
/*
* @brief BME68X device structure
*/
struct bme68x_dev
{
/*! Chip Id */
uint8_t chip_id;
/*!
* The interface pointer is used to enable the user
* to link their interface descriptors for reference during the
* implementation of the read and write interfaces to the
* hardware.
*/
void *intf_ptr;
/*!
* Variant id
* ----------------------------------------
* Value | Variant
* ----------------------------------------
* 0 | BME68X_VARIANT_GAS_LOW
* 1 | BME68X_VARIANT_GAS_HIGH
* ----------------------------------------
*/
uint32_t variant_id;
/*! SPI/I2C interface */
enum bme68x_intf intf;
/*! Memory page used */
uint8_t mem_page;
/*! Ambient temperature in Degree C*/
int8_t amb_temp;
/*! Sensor calibration data */
struct bme68x_calib_data calib;
/*! Read function pointer */
bme68x_read_fptr_t read;
/*! Write function pointer */
bme68x_write_fptr_t write;
/*! Delay function pointer */
bme68x_delay_us_fptr_t delay_us;
/*! To store interface pointer error */
BME68X_INTF_RET_TYPE intf_rslt;
/*! Store the info messages */
uint8_t info_msg;
};
#endif /* BME68X_DEFS_H_ */
/*! @endcond */