106 lines
3.1 KiB
C
106 lines
3.1 KiB
C
/*
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* Copyright (c) 2018 Peter Bigot Consulting, LLC
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* Copyright (c) 2018 Linaro Ltd.
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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_CCS811_CCS811_H_
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#define ZEPHYR_DRIVERS_SENSOR_CCS811_CCS811_H_
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#include <zephyr/device.h>
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#include <zephyr/drivers/i2c.h>
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#include <zephyr/drivers/gpio.h>
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#include <zephyr/sys/util.h>
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#include <zephyr/drivers/sensor/ccs811.h>
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/* Registers */
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#define CCS811_REG_STATUS 0x00
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#define CCS811_REG_MEAS_MODE 0x01
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#define CCS811_REG_ALG_RESULT_DATA 0x02
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#define CCS811_REG_RAW_DATA 0x03
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#define CCS811_REG_ENV_DATA 0x05
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#define CCS811_REG_THRESHOLDS 0x10
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#define CCS811_REG_BASELINE 0x11
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#define CCS811_REG_HW_ID 0x20
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#define CCS811_REG_HW_VERSION 0x21
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#define CCS811_REG_FW_BOOT_VERSION 0x23
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#define CCS811_REG_FW_APP_VERSION 0x24
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#define CCS811_REG_ERROR_ID 0xE0
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#define CCS811_REG_APP_START 0xF4
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#define CCS881_HW_ID 0x81
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#define CCS811_HW_VERSION_MSK 0xF0
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/* Measurement modes */
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#define CCS811_MODE_RAW_DATA 0x40
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#define CCS811_MODE_DATARDY 0x08
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#define CCS811_MODE_THRESH 0x04
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#define CCS811_RAW_VOLTAGE_POS 0
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#define CCS811_RAW_VOLTAGE_MSK (0x3FF << CCS811_RAW_VOLTAGE_POS)
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#define CCS811_RAW_VOLTAGE_SCALE (1650000U / (CCS811_RAW_VOLTAGE_MSK \
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>> CCS811_RAW_VOLTAGE_POS))
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#define CCS811_RAW_CURRENT_POS 10
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#define CCS811_RAW_CURRENT_MSK (0x3F << CCS811_RAW_CURRENT_POS)
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#define CCS811_RAW_CURRENT_SCALE 1
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#define CCS811_CO2_MIN_PPM 400
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#define CCS811_CO2_MAX_PPM 32767
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struct ccs811_data {
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#ifdef CONFIG_CCS811_TRIGGER
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const struct device *dev;
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/*
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* DATARDY is configured through SENSOR_CHAN_ALL.
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* THRESH would be configured through SENSOR_CHAN_CO2.
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*/
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struct gpio_callback gpio_cb;
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sensor_trigger_handler_t handler;
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const struct sensor_trigger *trigger;
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#if defined(CONFIG_CCS811_TRIGGER_OWN_THREAD)
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K_KERNEL_STACK_MEMBER(thread_stack, CONFIG_CCS811_THREAD_STACK_SIZE);
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struct k_sem gpio_sem;
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struct k_thread thread;
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#elif defined(CONFIG_CCS811_TRIGGER_GLOBAL_THREAD)
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struct k_work work;
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#endif
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uint16_t co2_l2m;
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uint16_t co2_m2h;
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#endif /* CONFIG_CCS811_TRIGGER */
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struct ccs811_result_type result;
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uint8_t mode;
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uint8_t app_fw_ver;
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};
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struct ccs811_config {
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struct i2c_dt_spec i2c;
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struct gpio_dt_spec irq_gpio;
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struct gpio_dt_spec reset_gpio;
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struct gpio_dt_spec wake_gpio;
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};
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#ifdef CONFIG_CCS811_TRIGGER
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int ccs811_mutate_meas_mode(const struct device *dev,
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uint8_t set,
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uint8_t clear);
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int ccs811_set_thresholds(const struct device *dev);
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int ccs811_attr_set(const struct device *dev,
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enum sensor_channel chan,
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enum sensor_attribute attr,
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const struct sensor_value *val);
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int ccs811_trigger_set(const struct device *dev,
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const struct sensor_trigger *trig,
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sensor_trigger_handler_t handler);
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int ccs811_init_interrupt(const struct device *dev);
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#endif /* CONFIG_CCS811_TRIGGER */
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#endif /* _SENSOR_CCS811_ */
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