127 lines
3.6 KiB
C
127 lines
3.6 KiB
C
/* ST Microelectronics IIS2DLPC 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/iis2dlpc.pdf
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*/
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#ifndef ZEPHYR_DRIVERS_SENSOR_IIS2DLPC_IIS2DLPC_H_
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#define ZEPHYR_DRIVERS_SENSOR_IIS2DLPC_IIS2DLPC_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.h>
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#include <stmemsc.h>
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#include "iis2dlpc_reg.h"
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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 /* DT_ANY_INST_ON_BUS_STATUS_OKAY(spi) */
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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 /* DT_ANY_INST_ON_BUS_STATUS_OKAY(i2c) */
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/* Return ODR reg value based on data rate set */
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#define IIS2DLPC_ODR_TO_REG(_odr) \
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((_odr <= 1) ? IIS2DLPC_XL_ODR_1Hz6_LP_ONLY : \
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(_odr <= 12) ? IIS2DLPC_XL_ODR_12Hz5 : \
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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 IIS2DLPC_FS_TO_REG(_fs) (30 - __builtin_clz(_fs))
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/* Acc Gain value in ug/LSB in High Perf mode */
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#define IIS2DLPC_FS_2G_GAIN 244
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#define IIS2DLPC_FS_4G_GAIN 488
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#define IIS2DLPC_FS_8G_GAIN 976
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#define IIS2DLPC_FS_16G_GAIN 1952
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#define IIS2DLPC_SHFT_GAIN_NOLP1 2
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#define IIS2DLPC_ACCEL_GAIN_DEFAULT_VAL IIS2DLPC_FS_2G_GAIN
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#define IIS2DLPC_FS_TO_GAIN(_fs, _lp1) \
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(IIS2DLPC_FS_2G_GAIN << ((_fs) + (_lp1)))
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/* shift value for power mode */
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#define IIS2DLPC_SHIFT_PM1 4
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#define IIS2DLPC_SHIFT_PMOTHER 2
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/**
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* struct iis2dlpc_dev_config - iis2dlpc 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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* @irq_dev_name: Pointer to GPIO PORT identifier.
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* @irq_pin: GPIO pin number connected to sensor int pin.
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* @drdy_int: Sensor drdy int (int1/int2).
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*/
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struct iis2dlpc_config {
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stmdev_ctx_t ctx;
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union {
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#if DT_ANY_INST_ON_BUS_STATUS_OKAY(i2c)
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const 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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const struct spi_dt_spec spi;
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#endif
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} stmemsc_cfg;
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iis2dlpc_mode_t pm;
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uint8_t range;
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#ifdef CONFIG_IIS2DLPC_TRIGGER
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const struct gpio_dt_spec gpio_drdy;
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uint8_t drdy_int;
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#ifdef CONFIG_IIS2DLPC_TAP
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uint8_t tap_mode;
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uint8_t tap_threshold[3];
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uint8_t tap_shock;
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uint8_t tap_latency;
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uint8_t tap_quiet;
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#endif /* CONFIG_IIS2DLPC_TAP */
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#endif /* CONFIG_IIS2DLPC_TRIGGER */
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};
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/* sensor data */
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struct iis2dlpc_data {
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const struct device *dev;
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int16_t acc[3];
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/* save sensitivity */
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uint16_t gain;
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#ifdef CONFIG_IIS2DLPC_TRIGGER
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const 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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const struct sensor_trigger *drdy_trig;
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#ifdef CONFIG_IIS2DLPC_TAP
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sensor_trigger_handler_t tap_handler;
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const struct sensor_trigger *tap_trig;
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sensor_trigger_handler_t double_tap_handler;
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const struct sensor_trigger *double_tap_trig;
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#endif /* CONFIG_IIS2DLPC_TAP */
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#ifdef CONFIG_IIS2DLPC_ACTIVITY
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sensor_trigger_handler_t activity_handler;
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const struct sensor_trigger *activity_trig;
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#endif /* CONFIG_IIS2DLPC_ACTIVITY */
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#if defined(CONFIG_IIS2DLPC_TRIGGER_OWN_THREAD)
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K_KERNEL_STACK_MEMBER(thread_stack, CONFIG_IIS2DLPC_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_IIS2DLPC_TRIGGER_GLOBAL_THREAD)
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struct k_work work;
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#endif /* CONFIG_IIS2DLPC_TRIGGER_GLOBAL_THREAD */
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#endif /* CONFIG_IIS2DLPC_TRIGGER */
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};
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#ifdef CONFIG_IIS2DLPC_TRIGGER
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int iis2dlpc_init_interrupt(const struct device *dev);
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int iis2dlpc_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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#endif /* CONFIG_IIS2DLPC_TRIGGER */
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#endif /* ZEPHYR_DRIVERS_SENSOR_IIS2DLPC_IIS2DLPC_H_ */
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