222 lines
6.4 KiB
C
222 lines
6.4 KiB
C
/*
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* Copyright (c) 2018 Bosch Sensortec GmbH
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* Copyright (c) 2022, Leonard Pollak
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef __ZEPHYR_DRIVERS_SENSOR_BME680_H__
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#define __ZEPHYR_DRIVERS_SENSOR_BME680_H__
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#include <zephyr/types.h>
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#include <zephyr/device.h>
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#include <zephyr/devicetree.h>
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#include <zephyr/drivers/spi.h>
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#include <zephyr/drivers/i2c.h>
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#define DT_DRV_COMPAT bosch_bme680
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#define BME680_BUS_SPI DT_ANY_INST_ON_BUS_STATUS_OKAY(spi)
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#define BME680_BUS_I2C DT_ANY_INST_ON_BUS_STATUS_OKAY(i2c)
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union bme680_bus {
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#if BME680_BUS_SPI
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struct spi_dt_spec spi;
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#endif
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#if BME680_BUS_I2C
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struct i2c_dt_spec i2c;
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#endif
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};
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typedef int (*bme680_bus_check_fn)(const union bme680_bus *bus);
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typedef int (*bme680_reg_read_fn)(const struct device *dev,
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uint8_t start, uint8_t *buf, int size);
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typedef int (*bme680_reg_write_fn)(const struct device *dev,
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uint8_t reg, uint8_t val);
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struct bme680_bus_io {
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bme680_bus_check_fn check;
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bme680_reg_read_fn read;
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bme680_reg_write_fn write;
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};
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#if BME680_BUS_SPI
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#define BME680_SPI_OPERATION (SPI_WORD_SET(8) | SPI_TRANSFER_MSB | SPI_MODE_CPOL \
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| SPI_MODE_CPHA | SPI_OP_MODE_MASTER)
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extern const struct bme680_bus_io bme680_bus_io_spi;
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#endif
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#if BME680_BUS_I2C
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extern const struct bme680_bus_io bme680_bus_io_i2c;
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#endif
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struct bme680_config {
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union bme680_bus bus;
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const struct bme680_bus_io *bus_io;
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};
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#define BME680_CHIP_ID 0x61
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#define BME680_LEN_FIELD 15
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#define BME680_LEN_COEFF_ALL 42
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#define BME680_LEN_COEFF1 23
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#define BME680_LEN_COEFF2 14
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#define BME680_LEN_COEFF3 5
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#define BME680_REG_COEFF3 0x00
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#define BME680_REG_FIELD0 0x1d
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#define BME680_REG_IDAC_HEAT0 0x50
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#define BME680_REG_RES_HEAT0 0x5A
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#define BME680_REG_GAS_WAIT0 0x64
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#define BME680_REG_SHD_HEATR_DUR 0x6E
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#define BME680_REG_CTRL_GAS_0 0x70
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#define BME680_REG_CTRL_GAS_1 0x71
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#define BME680_REG_CTRL_HUM 0x72
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#define BME680_REG_CTRL_MEAS 0x74
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#define BME680_REG_CONFIG 0x75
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#define BME680_REG_MEM_PAGE 0x73
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#define BME680_REG_UNIQUE_ID 0x83
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#define BME680_REG_COEFF1 0x8a
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#define BME680_REG_COEFF2 0xe1
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#define BME680_REG_CHIP_ID 0xd0
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#define BME680_REG_SOFT_RESET 0xe0
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#define BME680_MSK_NEW_DATA 0x80
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#define BME680_MSK_GAS_RANGE 0x0f
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#define BME680_MSK_RH_RANGE 0x30
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#define BME680_MSK_RANGE_SW_ERR 0xf0
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#define BME680_MSK_HEATR_STAB 0x10
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#define BME680_SPI_READ_BIT 0x80
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#define BME680_SPI_WRITE_MSK 0x7f
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#define BME680_MEM_PAGE1 0x00
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#define BME680_MEM_PAGE0 0x10
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#if defined CONFIG_BME680_TEMP_OVER_1X
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#define BME680_TEMP_OVER (1 << 5)
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#elif defined CONFIG_BME680_TEMP_OVER_2X
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#define BME680_TEMP_OVER (2 << 5)
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#elif defined CONFIG_BME680_TEMP_OVER_4X
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#define BME680_TEMP_OVER (3 << 5)
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#elif defined CONFIG_BME680_TEMP_OVER_8X
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#define BME680_TEMP_OVER (4 << 5)
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#elif defined CONFIG_BME680_TEMP_OVER_16X
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#define BME680_TEMP_OVER (5 << 5)
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#endif
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#if defined CONFIG_BME680_PRESS_OVER_1X
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#define BME680_PRESS_OVER (1 << 2)
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#elif defined CONFIG_BME680_PRESS_OVER_2X
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#define BME680_PRESS_OVER (2 << 2)
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#elif defined CONFIG_BME680_PRESS_OVER_4X
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#define BME680_PRESS_OVER (3 << 2)
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#elif defined CONFIG_BME680_PRESS_OVER_8X
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#define BME680_PRESS_OVER (4 << 2)
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#elif defined CONFIG_BME680_PRESS_OVER_16X
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#define BME680_PRESS_OVER (5 << 2)
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#endif
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#if defined CONFIG_BME680_HUMIDITY_OVER_1X
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#define BME680_HUMIDITY_OVER 1
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#elif defined CONFIG_BME680_HUMIDITY_OVER_2X
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#define BME680_HUMIDITY_OVER 2
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#elif defined CONFIG_BME680_HUMIDITY_OVER_4X
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#define BME680_HUMIDITY_OVER 3
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#elif defined CONFIG_BME680_HUMIDITY_OVER_8X
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#define BME680_HUMIDITY_OVER 4
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#elif defined CONFIG_BME680_HUMIDITY_OVER_16X
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#define BME680_HUMIDITY_OVER 5
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#endif
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#if defined CONFIG_BME680_HEATR_TEMP_LP
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#define BME680_HEATR_TEMP 320
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#elif defined CONFIG_BME680_HEATR_TEMP_ULP
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#define BME680_HEATR_TEMP 400
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#endif
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#if defined CONFIG_BME680_HEATR_DUR_LP
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#define BME680_HEATR_DUR_MS 197
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#elif defined CONFIG_BME680_HEATR_DUR_ULP
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#define BME680_HEATR_DUR_MS 1943
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#endif
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#if defined CONFIG_BME680_FILTER_OFF
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#define BME680_FILTER 0
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#elif defined CONFIG_BME680_FILTER_2
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#define BME680_FILTER (1 << 2)
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#elif defined CONFIG_BME680_FILTER_4
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#define BME680_FILTER (2 << 2)
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#elif defined CONFIG_BME680_FILTER_8
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#define BME680_FILTER (3 << 2)
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#elif defined CONFIG_BME680_FILTER_16
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#define BME680_FILTER (4 << 2)
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#elif defined CONFIG_BME680_FILTER_32
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#define BME680_FILTER (5 << 2)
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#elif defined CONFIG_BME680_FILTER_64
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#define BME680_FILTER (6 << 2)
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#elif defined CONFIG_BME680_FILTER_128
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#define BME680_FILTER (7 << 2)
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#endif
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#define BME680_MODE_SLEEP 0
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#define BME680_MODE_FORCED 1
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#define BME680_CTRL_MEAS_VAL (BME680_PRESS_OVER | BME680_TEMP_OVER \
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| BME680_MODE_FORCED)
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#define BME680_CONFIG_VAL BME680_FILTER
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#define BME680_CTRL_GAS_1_VAL 0x10
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#define BME680_CONCAT_BYTES(msb, lsb) (((uint16_t)msb << 8) | (uint16_t)lsb)
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struct bme680_data {
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/* Compensation parameters. */
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uint16_t par_h1;
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uint16_t par_h2;
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int8_t par_h3;
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int8_t par_h4;
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int8_t par_h5;
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uint8_t par_h6;
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int8_t par_h7;
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int8_t par_gh1;
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int16_t par_gh2;
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int8_t par_gh3;
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uint16_t par_t1;
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int16_t par_t2;
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int8_t par_t3;
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uint16_t par_p1;
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int16_t par_p2;
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int8_t par_p3;
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int16_t par_p4;
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int16_t par_p5;
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int8_t par_p6;
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int8_t par_p7;
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int16_t par_p8;
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int16_t par_p9;
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uint8_t par_p10;
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uint8_t res_heat_range;
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int8_t res_heat_val;
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int8_t range_sw_err;
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/* Calculated sensor values. */
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int32_t calc_temp;
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uint32_t calc_press;
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uint32_t calc_humidity;
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uint32_t calc_gas_resistance;
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/* Additional information */
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uint8_t new_data;
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uint8_t heatr_stab;
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/* Carryover between temperature and pressure/humidity compensation. */
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int32_t t_fine;
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uint8_t chip_id;
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#if BME680_BUS_SPI
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uint8_t mem_page;
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#endif
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};
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#endif /* __ZEPHYR_DRIVERS_SENSOR_BME680_H__ */
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