144 lines
4.1 KiB
C
144 lines
4.1 KiB
C
/*
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* Copyright (c) 2024 Gustavo Silva
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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_ENS160_ENS160_H_
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#define ZEPHYR_DRIVERS_SENSOR_ENS160_ENS160_H_
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#include <zephyr/types.h>
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#include <zephyr/device.h>
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#include <zephyr/drivers/gpio.h>
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#include <zephyr/logging/log.h>
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#include <zephyr/drivers/sensor.h>
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#if DT_ANY_INST_ON_BUS_STATUS_OKAY(i2c)
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#include <zephyr/drivers/i2c.h>
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#endif
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#if DT_ANY_INST_ON_BUS_STATUS_OKAY(spi)
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#include <zephyr/drivers/spi.h>
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#endif
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/* Registers */
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#define ENS160_REG_PART_ID 0x00
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#define ENS160_REG_OPMODE 0x10
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#define ENS160_REG_CONFIG 0x11
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#define ENS160_REG_COMMAND 0x12
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#define ENS160_REG_TEMP_IN 0x13
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#define ENS160_REG_RH_IN 0x15
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#define ENS160_REG_DEVICE_STATUS 0x20
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#define ENS160_REG_DATA_AQI 0x21
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#define ENS160_REG_DATA_TVOC 0x22
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#define ENS160_REG_DATA_ECO2 0x24
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#define ENS160_REG_DATA_T 0x30
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#define ENS160_REG_DATA_RH 0x32
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#define ENS160_REG_DATA_MISR 0x38
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#define ENS160_REG_GPR_WRITE0 0x40
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#define ENS160_REG_GPR_WRITE1 0x41
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#define ENS160_REG_GPR_WRITE2 0x42
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#define ENS160_REG_GPR_WRITE3 0x43
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#define ENS160_REG_GPR_WRITE4 0x44
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#define ENS160_REG_GPR_WRITE5 0x45
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#define ENS160_REG_GPR_WRITE6 0x46
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#define ENS160_REG_GPR_WRITE7 0x47
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#define ENS160_REG_GPR_READ0 0x48
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#define ENS160_REG_GPR_READ1 0x49
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#define ENS160_REG_GPR_READ2 0x4A
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#define ENS160_REG_GPR_READ3 0x4B
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#define ENS160_REG_GPR_READ4 0x4C
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#define ENS160_REG_GPR_READ5 0x4D
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#define ENS160_REG_GPR_READ6 0x4E
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#define ENS160_REG_GPR_READ7 0x4F
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#define ENS160_PART_ID 0x160
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#define ENS160_TIMEOUT_US (1000000U)
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#define ENS160_BOOTING_TIME_MS (10U)
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/* Operation modes */
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#define ENS160_OPMODE_DEEP_SLEEP 0x00
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#define ENS160_OPMODE_IDLE 0x01
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#define ENS160_OPMODE_STANDARD 0x02
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#define ENS160_OPMODE_RESET 0xF0
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/* Device status */
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#define ENS160_STATUS_STATER BIT(6)
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#define ENS160_STATUS_VALIDITY_FLAG GENMASK(3, 2)
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#define ENS160_STATUS_NEWDAT BIT(1)
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#define ENS160_STATUS_NORMAL 0x00
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#define ENS160_STATUS_WARM_UP 0x01
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#define ENS160_STATUS_START_UP 0x02
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#define ENS160_STATUS_INVALID 0x03
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/* Commands */
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#define ENS160_COMMAND_NOP 0x00
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#define ENS160_COMMAND_GET_APPVER 0x0E
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#define ENS160_COMMAND_CLRGPR 0xCC
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/* Config register fields */
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#define ENS160_CONFIG_INTPOL BIT(6)
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#define ENS160_CONFIG_INT_CFG BIT(5)
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#define ENS160_CONFIG_INTGPR BIT(3)
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#define ENS160_CONFIG_INTDAT BIT(1)
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#define ENS160_CONFIG_INTEN BIT(0)
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#define ENS160_DATA_AQI_UBA GENMASK(2, 0)
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struct ens160_config {
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int (*bus_init)(const struct device *dev);
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const union {
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#if DT_ANY_INST_ON_BUS_STATUS_OKAY(i2c)
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struct i2c_dt_spec i2c;
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#endif
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#if DT_ANY_INST_ON_BUS_STATUS_OKAY(spi)
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struct spi_dt_spec spi;
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#endif
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};
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#ifdef CONFIG_ENS160_TRIGGER
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struct gpio_dt_spec int_gpio;
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#endif
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};
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struct ens160_transfer_function {
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int (*read_reg)(const struct device *dev, uint8_t reg, uint8_t *val);
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int (*read_data)(const struct device *dev, uint8_t reg, uint8_t *data, size_t len);
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int (*write_reg)(const struct device *dev, uint8_t reg, uint8_t val);
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int (*write_data)(const struct device *dev, uint8_t reg, uint8_t *data, size_t len);
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};
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struct ens160_data {
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uint16_t eco2;
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uint16_t tvoc;
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uint8_t aqi;
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const struct ens160_transfer_function *tf;
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#ifdef CONFIG_ENS160_TRIGGER
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struct gpio_callback gpio_cb;
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const struct device *dev;
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sensor_trigger_handler_t data_ready_handler;
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const struct sensor_trigger *data_ready_trigger;
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#if defined(CONFIG_ENS160_TRIGGER_OWN_THREAD)
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K_KERNEL_STACK_MEMBER(thread_stack, CONFIG_ENS160_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_ENS160_TRIGGER_GLOBAL_THREAD)
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struct k_work work;
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#endif
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#endif /* CONFIG_ENS160_TRIGGER */
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};
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#ifdef CONFIG_ENS160_TRIGGER
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int ens160_trigger_set(const struct device *dev, const struct sensor_trigger *trigg,
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sensor_trigger_handler_t handler);
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int ens160_init_interrupt(const struct device *dev);
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#endif
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int ens160_i2c_init(const struct device *dev);
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int ens160_spi_init(const struct device *dev);
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#endif /* ZEPHYR_DRIVERS_SENSOR_ENS160_ENS160_H_ */
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