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/*
* Copyright (c) 2018 Bosch Sensortec GmbH
* Copyright (c) 2022, Leonard Pollak
*
* SPDX-License-Identifier: Apache-2.0
*/
#ifndef __ZEPHYR_DRIVERS_SENSOR_BME680_H__
#define __ZEPHYR_DRIVERS_SENSOR_BME680_H__
#include <zephyr/types.h>
#include <zephyr/device.h>
#include <zephyr/devicetree.h>
#include <zephyr/drivers/spi.h>
#include <zephyr/drivers/i2c.h>
#define DT_DRV_COMPAT bosch_bme680
#define BME680_BUS_SPI DT_ANY_INST_ON_BUS_STATUS_OKAY(spi)
#define BME680_BUS_I2C DT_ANY_INST_ON_BUS_STATUS_OKAY(i2c)
union bme680_bus {
#if BME680_BUS_SPI
struct spi_dt_spec spi;
#endif
#if BME680_BUS_I2C
struct i2c_dt_spec i2c;
#endif
};
typedef int (*bme680_bus_check_fn)(const union bme680_bus *bus);
typedef int (*bme680_reg_read_fn)(const struct device *dev,
uint8_t start, uint8_t *buf, int size);
typedef int (*bme680_reg_write_fn)(const struct device *dev,
uint8_t reg, uint8_t val);
struct bme680_bus_io {
bme680_bus_check_fn check;
bme680_reg_read_fn read;
bme680_reg_write_fn write;
};
#if BME680_BUS_SPI
#define BME680_SPI_OPERATION (SPI_WORD_SET(8) | SPI_TRANSFER_MSB | SPI_MODE_CPOL \
| SPI_MODE_CPHA | SPI_OP_MODE_MASTER)
extern const struct bme680_bus_io bme680_bus_io_spi;
#endif
#if BME680_BUS_I2C
extern const struct bme680_bus_io bme680_bus_io_i2c;
#endif
struct bme680_config {
union bme680_bus bus;
const struct bme680_bus_io *bus_io;
};
#define BME680_CHIP_ID 0x61
#define BME680_LEN_FIELD 15
#define BME680_LEN_COEFF_ALL 42
#define BME680_LEN_COEFF1 23
#define BME680_LEN_COEFF2 14
#define BME680_LEN_COEFF3 5
#define BME680_REG_COEFF3 0x00
#define BME680_REG_FIELD0 0x1d
#define BME680_REG_IDAC_HEAT0 0x50
#define BME680_REG_RES_HEAT0 0x5A
#define BME680_REG_GAS_WAIT0 0x64
#define BME680_REG_SHD_HEATR_DUR 0x6E
#define BME680_REG_CTRL_GAS_0 0x70
#define BME680_REG_CTRL_GAS_1 0x71
#define BME680_REG_CTRL_HUM 0x72
#define BME680_REG_CTRL_MEAS 0x74
#define BME680_REG_CONFIG 0x75
#define BME680_REG_STATUS 0x73
#define BME680_REG_UNIQUE_ID 0x83
#define BME680_REG_COEFF1 0x8a
#define BME680_REG_COEFF2 0xe1
#define BME680_REG_CHIP_ID 0xd0
#define BME680_REG_SOFT_RESET 0xe0
#define BME680_MSK_NEW_DATA 0x80
#define BME680_MSK_GAS_RANGE 0x0f
#define BME680_MSK_RH_RANGE 0x30
#define BME680_MSK_RANGE_SW_ERR 0xf0
#define BME680_MSK_HEATR_STAB 0x10
#define BME680_SPI_MEM_PAGE_MSK 0x10
#define BME680_SPI_MEM_PAGE_POS 4
#define BME680_SPI_READ_BIT 0x80
#define BME680_SPI_WRITE_MSK 0x7f
#if defined CONFIG_BME680_TEMP_OVER_1X
#define BME680_TEMP_OVER (1 << 5)
#elif defined CONFIG_BME680_TEMP_OVER_2X
#define BME680_TEMP_OVER (2 << 5)
#elif defined CONFIG_BME680_TEMP_OVER_4X
#define BME680_TEMP_OVER (3 << 5)
#elif defined CONFIG_BME680_TEMP_OVER_8X
#define BME680_TEMP_OVER (4 << 5)
#elif defined CONFIG_BME680_TEMP_OVER_16X
#define BME680_TEMP_OVER (5 << 5)
#endif
#if defined CONFIG_BME680_PRESS_OVER_1X
#define BME680_PRESS_OVER (1 << 2)
#elif defined CONFIG_BME680_PRESS_OVER_2X
#define BME680_PRESS_OVER (2 << 2)
#elif defined CONFIG_BME680_PRESS_OVER_4X
#define BME680_PRESS_OVER (3 << 2)
#elif defined CONFIG_BME680_PRESS_OVER_8X
#define BME680_PRESS_OVER (4 << 2)
#elif defined CONFIG_BME680_PRESS_OVER_16X
#define BME680_PRESS_OVER (5 << 2)
#endif
#if defined CONFIG_BME680_HUMIDITY_OVER_1X
#define BME680_HUMIDITY_OVER 1
#elif defined CONFIG_BME680_HUMIDITY_OVER_2X
#define BME680_HUMIDITY_OVER 2
#elif defined CONFIG_BME680_HUMIDITY_OVER_4X
#define BME680_HUMIDITY_OVER 3
#elif defined CONFIG_BME680_HUMIDITY_OVER_8X
#define BME680_HUMIDITY_OVER 4
#elif defined CONFIG_BME680_HUMIDITY_OVER_16X
#define BME680_HUMIDITY_OVER 5
#endif
#if defined CONFIG_BME680_HEATR_TEMP_LP
#define BME680_HEATR_TEMP 320
#elif defined CONFIG_BME680_HEATR_TEMP_ULP
#define BME680_HEATR_TEMP 400
#endif
#if defined CONFIG_BME680_HEATR_DUR_LP
#define BME680_HEATR_DUR_MS 197
#elif defined CONFIG_BME680_HEATR_DUR_ULP
#define BME680_HEATR_DUR_MS 1943
#endif
#if defined CONFIG_BME680_FILTER_OFF
#define BME680_FILTER 0
#elif defined CONFIG_BME680_FILTER_2
#define BME680_FILTER (1 << 2)
#elif defined CONFIG_BME680_FILTER_4
#define BME680_FILTER (2 << 2)
#elif defined CONFIG_BME680_FILTER_8
#define BME680_FILTER (3 << 2)
#elif defined CONFIG_BME680_FILTER_16
#define BME680_FILTER (4 << 2)
#elif defined CONFIG_BME680_FILTER_32
#define BME680_FILTER (5 << 2)
#elif defined CONFIG_BME680_FILTER_64
#define BME680_FILTER (6 << 2)
#elif defined CONFIG_BME680_FILTER_128
#define BME680_FILTER (7 << 2)
#endif
#define BME680_MODE_SLEEP 0
#define BME680_MODE_FORCED 1
#define BME680_CTRL_MEAS_VAL (BME680_PRESS_OVER | BME680_TEMP_OVER \
| BME680_MODE_FORCED)
#define BME680_CONFIG_VAL BME680_FILTER
#define BME680_CTRL_GAS_1_VAL 0x10
#define BME680_CONCAT_BYTES(msb, lsb) (((uint16_t)msb << 8) | (uint16_t)lsb)
struct bme680_data {
/* Compensation parameters. */
uint16_t par_h1;
uint16_t par_h2;
int8_t par_h3;
int8_t par_h4;
int8_t par_h5;
uint8_t par_h6;
int8_t par_h7;
int8_t par_gh1;
int16_t par_gh2;
int8_t par_gh3;
uint16_t par_t1;
int16_t par_t2;
int8_t par_t3;
uint16_t par_p1;
int16_t par_p2;
int8_t par_p3;
int16_t par_p4;
int16_t par_p5;
int8_t par_p6;
int8_t par_p7;
int16_t par_p8;
int16_t par_p9;
uint8_t par_p10;
uint8_t res_heat_range;
int8_t res_heat_val;
int8_t range_sw_err;
/* Calculated sensor values. */
int32_t calc_temp;
uint32_t calc_press;
uint32_t calc_humidity;
uint32_t calc_gas_resistance;
/* Additional information */
uint8_t new_data;
uint8_t heatr_stab;
/* Carryover between temperature and pressure/humidity compensation. */
int32_t t_fine;
uint8_t chip_id;
#if BME680_BUS_SPI
uint8_t mem_page;
#endif
};
#endif /* __ZEPHYR_DRIVERS_SENSOR_BME680_H__ */
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