96 lines
2.6 KiB
C
96 lines
2.6 KiB
C
/* ST Microelectronics IIS2DH 3-axis accelerometer driver
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*
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* Copyright (c) 2020 STMicroelectronics
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Datasheet:
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* https://www.st.com/resource/en/datasheet/iis2dh.pdf
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*/
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#ifndef ZEPHYR_DRIVERS_SENSOR_IIS2DH_IIS2DH_H_
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#define ZEPHYR_DRIVERS_SENSOR_IIS2DH_IIS2DH_H_
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#include <drivers/spi.h>
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#include <drivers/gpio.h>
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#include <sys/util.h>
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#include <drivers/sensor.h>
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#include "iis2dh_reg.h"
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union axis3bit16_t {
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int16_t i16bit[3];
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uint8_t u8bit[6];
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};
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/*
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* Return ODR reg value based on data rate set
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*/
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#define IIS2DH_ODR_TO_REG_HR(_lp, _odr) \
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((_odr == 0) ? IIS2DH_POWER_DOWN : \
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((_odr < 10) ? IIS2DH_ODR_1Hz : \
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((_odr < 25) ? IIS2DH_ODR_10Hz : \
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((_lp == IIS2DH_LP_8bit) && (_odr >= 5376) ? IIS2DH_ODR_5kHz376_LP_1kHz344_NM_HP : \
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((_lp != IIS2DH_LP_8bit) && (_odr >= 1344) ? IIS2DH_ODR_5kHz376_LP_1kHz344_NM_HP : \
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((_lp == IIS2DH_LP_8bit) && (_odr >= 1600) ? IIS2DH_ODR_1kHz620_LP : \
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((_lp != IIS2DH_LP_8bit) && (_odr >= 800) ? IIS2DH_ODR_400Hz : \
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((31 - __builtin_clz(_odr / 25))) + 3)))))))
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/* FS reg value from Full Scale */
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#define IIS2DH_FS_TO_REG(_fs) (30 - __builtin_clz(_fs))
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/**
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* struct iis2dh_device_config - iis2dh hw configuration
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* @bus_name: Pointer to bus master identifier.
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* @pm: Power mode (lis2dh_powermode).
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* @int_gpio_port: Pointer to GPIO PORT identifier.
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* @int_gpio_pin: GPIO pin number connecter to sensor int pin.
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*/
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struct iis2dh_device_config {
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const char *bus_name;
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uint8_t pm;
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#ifdef CONFIG_IIS2DH_TRIGGER
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const char *int_gpio_port;
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uint8_t int_gpio_pin;
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uint8_t int_gpio_flags;
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uint8_t int_pin;
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#endif /* CONFIG_IIS2DH_TRIGGER */
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};
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/* sensor data */
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struct iis2dh_data {
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struct device *bus;
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int16_t acc[3];
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uint32_t gain;
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stmdev_ctx_t *ctx;
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#ifdef CONFIG_IIS2DH_TRIGGER
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struct device *gpio;
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uint8_t gpio_pin;
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struct gpio_callback gpio_cb;
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sensor_trigger_handler_t drdy_handler;
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#if defined(CONFIG_IIS2DH_TRIGGER_OWN_THREAD)
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K_KERNEL_STACK_MEMBER(thread_stack, CONFIG_IIS2DH_THREAD_STACK_SIZE);
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struct k_thread thread;
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struct k_sem gpio_sem;
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#elif defined(CONFIG_IIS2DH_TRIGGER_GLOBAL_THREAD)
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struct k_work work;
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struct device *dev;
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#endif /* CONFIG_IIS2DH_TRIGGER_GLOBAL_THREAD */
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#endif /* CONFIG_IIS2DH_TRIGGER */
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#if DT_INST_SPI_DEV_HAS_CS_GPIOS(0)
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struct spi_cs_control cs_ctrl;
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#endif
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};
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int iis2dh_i2c_init(struct device *dev);
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int iis2dh_spi_init(struct device *dev);
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#ifdef CONFIG_IIS2DH_TRIGGER
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int iis2dh_init_interrupt(struct device *dev);
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int iis2dh_trigger_set(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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#endif /* CONFIG_IIS2DH_TRIGGER */
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#endif /* ZEPHYR_DRIVERS_SENSOR_IIS2DH_IIS2DH_H_ */
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