392 lines
11 KiB
C
392 lines
11 KiB
C
/**
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* Copyright (c) 2020 Bosch Sensortec GmbH. All rights reserved.
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*
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* BSD-3-Clause
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* @file bme280_defs.h
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* @date 21/01/2020
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* @version 3.4.2
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*
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*/
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/*! @file bme280_defs.h
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* @brief Sensor driver for BME280 sensor
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*/
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/*!
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* @defgroup BME280 SENSOR API
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* @brief
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*/
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#ifndef BME280_DEFS_H_
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#define BME280_DEFS_H_
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/********************************************************/
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/* header includes */
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#ifdef __KERNEL__
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#include <linux/types.h>
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#include <linux/kernel.h>
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#else
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#include <stdint.h>
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#include <stddef.h>
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#endif
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/********************************************************/
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/*! @name Common macros */
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/********************************************************/
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#if !defined(UINT8_C) && !defined(INT8_C)
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#define INT8_C(x) S8_C(x)
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#define UINT8_C(x) U8_C(x)
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#endif
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#if !defined(UINT16_C) && !defined(INT16_C)
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#define INT16_C(x) S16_C(x)
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#define UINT16_C(x) U16_C(x)
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#endif
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#if !defined(INT32_C) && !defined(UINT32_C)
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#define INT32_C(x) S32_C(x)
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#define UINT32_C(x) U32_C(x)
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#endif
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#if !defined(INT64_C) && !defined(UINT64_C)
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#define INT64_C(x) S64_C(x)
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#define UINT64_C(x) U64_C(x)
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#endif
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/**@}*/
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/**\name C standard macros */
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#ifndef NULL
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#ifdef __cplusplus
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#define NULL 0
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#else
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#define NULL ((void *) 0)
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#endif
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#endif
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/********************************************************/
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#ifndef BME280_FLOAT_ENABLE
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/* #define BME280_FLOAT_ENABLE */
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#endif
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#ifndef BME280_FLOAT_ENABLE
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#ifndef BME280_64BIT_ENABLE
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/* #define BME280_64BIT_ENABLE */
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#endif
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#endif
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#ifndef TRUE
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#define TRUE UINT8_C(1)
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#endif
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#ifndef FALSE
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#define FALSE UINT8_C(0)
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#endif
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/**\name I2C addresses */
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#define BME280_I2C_ADDR_PRIM UINT8_C(0x76)
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#define BME280_I2C_ADDR_SEC UINT8_C(0x77)
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/**\name BME280 chip identifier */
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#define BME280_CHIP_ID UINT8_C(0x60)
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/**\name Register Address */
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#define BME280_CHIP_ID_ADDR UINT8_C(0xD0)
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#define BME280_RESET_ADDR UINT8_C(0xE0)
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#define BME280_TEMP_PRESS_CALIB_DATA_ADDR UINT8_C(0x88)
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#define BME280_HUMIDITY_CALIB_DATA_ADDR UINT8_C(0xE1)
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#define BME280_PWR_CTRL_ADDR UINT8_C(0xF4)
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#define BME280_CTRL_HUM_ADDR UINT8_C(0xF2)
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#define BME280_CTRL_MEAS_ADDR UINT8_C(0xF4)
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#define BME280_CONFIG_ADDR UINT8_C(0xF5)
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#define BME280_DATA_ADDR UINT8_C(0xF7)
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/**\name API success code */
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#define BME280_OK INT8_C(0)
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/**\name API error codes */
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#define BME280_E_NULL_PTR INT8_C(-1)
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#define BME280_E_DEV_NOT_FOUND INT8_C(-2)
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#define BME280_E_INVALID_LEN INT8_C(-3)
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#define BME280_E_COMM_FAIL INT8_C(-4)
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#define BME280_E_SLEEP_MODE_FAIL INT8_C(-5)
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#define BME280_E_NVM_COPY_FAILED INT8_C(-6)
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/**\name API warning codes */
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#define BME280_W_INVALID_OSR_MACRO INT8_C(1)
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/**\name Macros related to size */
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#define BME280_TEMP_PRESS_CALIB_DATA_LEN UINT8_C(26)
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#define BME280_HUMIDITY_CALIB_DATA_LEN UINT8_C(7)
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#define BME280_P_T_H_DATA_LEN UINT8_C(8)
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/**\name Sensor power modes */
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#define BME280_SLEEP_MODE UINT8_C(0x00)
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#define BME280_FORCED_MODE UINT8_C(0x01)
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#define BME280_NORMAL_MODE UINT8_C(0x03)
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/**\name Macro to combine two 8 bit data's to form a 16 bit data */
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#define BME280_CONCAT_BYTES(msb, lsb) (((uint16_t)msb << 8) | (uint16_t)lsb)
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#define BME280_SET_BITS(reg_data, bitname, data) \
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((reg_data & ~(bitname##_MSK)) | \
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((data << bitname##_POS) & bitname##_MSK))
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#define BME280_SET_BITS_POS_0(reg_data, bitname, data) \
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((reg_data & ~(bitname##_MSK)) | \
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(data & bitname##_MSK))
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#define BME280_GET_BITS(reg_data, bitname) ((reg_data & (bitname##_MSK)) >> \
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(bitname##_POS))
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#define BME280_GET_BITS_POS_0(reg_data, bitname) (reg_data & (bitname##_MSK))
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/**\name Macros for bit masking */
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#define BME280_SENSOR_MODE_MSK UINT8_C(0x03)
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#define BME280_SENSOR_MODE_POS UINT8_C(0x00)
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#define BME280_CTRL_HUM_MSK UINT8_C(0x07)
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#define BME280_CTRL_HUM_POS UINT8_C(0x00)
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#define BME280_CTRL_PRESS_MSK UINT8_C(0x1C)
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#define BME280_CTRL_PRESS_POS UINT8_C(0x02)
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#define BME280_CTRL_TEMP_MSK UINT8_C(0xE0)
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#define BME280_CTRL_TEMP_POS UINT8_C(0x05)
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#define BME280_FILTER_MSK UINT8_C(0x1C)
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#define BME280_FILTER_POS UINT8_C(0x02)
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#define BME280_STANDBY_MSK UINT8_C(0xE0)
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#define BME280_STANDBY_POS UINT8_C(0x05)
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/**\name Sensor component selection macros
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* These values are internal for API implementation. Don't relate this to
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* data sheet.
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*/
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#define BME280_PRESS UINT8_C(1)
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#define BME280_TEMP UINT8_C(1 << 1)
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#define BME280_HUM UINT8_C(1 << 2)
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#define BME280_ALL UINT8_C(0x07)
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/**\name Settings selection macros */
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#define BME280_OSR_PRESS_SEL UINT8_C(1)
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#define BME280_OSR_TEMP_SEL UINT8_C(1 << 1)
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#define BME280_OSR_HUM_SEL UINT8_C(1 << 2)
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#define BME280_FILTER_SEL UINT8_C(1 << 3)
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#define BME280_STANDBY_SEL UINT8_C(1 << 4)
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#define BME280_ALL_SETTINGS_SEL UINT8_C(0x1F)
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/**\name Oversampling macros */
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#define BME280_NO_OVERSAMPLING UINT8_C(0x00)
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#define BME280_OVERSAMPLING_1X UINT8_C(0x01)
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#define BME280_OVERSAMPLING_2X UINT8_C(0x02)
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#define BME280_OVERSAMPLING_4X UINT8_C(0x03)
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#define BME280_OVERSAMPLING_8X UINT8_C(0x04)
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#define BME280_OVERSAMPLING_16X UINT8_C(0x05)
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/**\name Measurement delay calculation macros */
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#define BME280_MEAS_OFFSET UINT16_C(1250)
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#define BME280_MEAS_DUR UINT16_C(2300)
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#define BME280_PRES_HUM_MEAS_OFFSET UINT16_C(575)
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#define BME280_MEAS_SCALING_FACTOR UINT16_C(1000)
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/**\name Standby duration selection macros */
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#define BME280_STANDBY_TIME_0_5_MS (0x00)
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#define BME280_STANDBY_TIME_62_5_MS (0x01)
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#define BME280_STANDBY_TIME_125_MS (0x02)
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#define BME280_STANDBY_TIME_250_MS (0x03)
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#define BME280_STANDBY_TIME_500_MS (0x04)
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#define BME280_STANDBY_TIME_1000_MS (0x05)
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#define BME280_STANDBY_TIME_10_MS (0x06)
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#define BME280_STANDBY_TIME_20_MS (0x07)
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/**\name Filter coefficient selection macros */
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#define BME280_FILTER_COEFF_OFF (0x00)
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#define BME280_FILTER_COEFF_2 (0x01)
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#define BME280_FILTER_COEFF_4 (0x02)
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#define BME280_FILTER_COEFF_8 (0x03)
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#define BME280_FILTER_COEFF_16 (0x04)
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#define BME280_STATUS_REG_ADDR (0xF3)
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#define BME280_SOFT_RESET_COMMAND (0xB6)
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#define BME280_STATUS_IM_UPDATE (0x01)
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/*!
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* @brief Interface selection Enums
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*/
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enum bme280_intf {
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/*! SPI interface */
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BME280_SPI_INTF,
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/*! I2C interface */
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BME280_I2C_INTF
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};
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/*!
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* @brief Type definitions
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*/
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typedef int8_t (*bme280_com_fptr_t)(uint8_t dev_id, uint8_t reg_addr, uint8_t *data, uint16_t len);
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typedef void (*bme280_delay_fptr_t)(uint32_t period);
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/*!
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* @brief Calibration data
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*/
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struct bme280_calib_data
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{
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/**
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* @ Trim Variables
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*/
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/**@{*/
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uint16_t dig_t1;
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int16_t dig_t2;
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int16_t dig_t3;
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uint16_t dig_p1;
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int16_t dig_p2;
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int16_t dig_p3;
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int16_t dig_p4;
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int16_t dig_p5;
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int16_t dig_p6;
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int16_t dig_p7;
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int16_t dig_p8;
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int16_t dig_p9;
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uint8_t dig_h1;
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int16_t dig_h2;
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uint8_t dig_h3;
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int16_t dig_h4;
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int16_t dig_h5;
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int8_t dig_h6;
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int32_t t_fine;
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/**@}*/
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};
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/*!
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* @brief bme280 sensor structure which comprises of temperature, pressure and
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* humidity data
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*/
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#ifdef BME280_FLOAT_ENABLE
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struct bme280_data
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{
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/*! Compensated pressure */
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double pressure;
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/*! Compensated temperature */
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double temperature;
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/*! Compensated humidity */
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double humidity;
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};
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#else
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struct bme280_data
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{
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/*! Compensated pressure */
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uint32_t pressure;
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/*! Compensated temperature */
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int32_t temperature;
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/*! Compensated humidity */
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uint32_t humidity;
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};
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#endif /* BME280_USE_FLOATING_POINT */
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/*!
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* @brief bme280 sensor structure which comprises of uncompensated temperature,
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* pressure and humidity data
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*/
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struct bme280_uncomp_data
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{
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/*! un-compensated pressure */
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uint32_t pressure;
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/*! un-compensated temperature */
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uint32_t temperature;
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/*! un-compensated humidity */
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uint32_t humidity;
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};
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/*!
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* @brief bme280 sensor settings structure which comprises of mode,
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* oversampling and filter settings.
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*/
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struct bme280_settings
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{
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/*! pressure oversampling */
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uint8_t osr_p;
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/*! temperature oversampling */
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uint8_t osr_t;
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/*! humidity oversampling */
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uint8_t osr_h;
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/*! filter coefficient */
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uint8_t filter;
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/*! standby time */
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uint8_t standby_time;
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};
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/*!
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* @brief bme280 device structure
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*/
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struct bme280_dev
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{
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/*! Chip Id */
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uint8_t chip_id;
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/*! Device Id */
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uint8_t dev_id;
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/*! SPI/I2C interface */
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enum bme280_intf intf;
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/*! Read function pointer */
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bme280_com_fptr_t read;
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/*! Write function pointer */
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bme280_com_fptr_t write;
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/*! Delay function pointer */
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bme280_delay_fptr_t delay_ms;
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/*! Trim data */
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struct bme280_calib_data calib_data;
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/*! Sensor settings */
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struct bme280_settings settings;
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};
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#endif /* BME280_DEFS_H_ */
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/** @}*/
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/** @}*/
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