148 lines
4.0 KiB
C
148 lines
4.0 KiB
C
/* ST Microelectronics LIS2DS12 3-axis accelerometer driver
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*
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* Copyright (c) 2019 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/lis2ds12.pdf
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*/
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#ifndef ZEPHYR_DRIVERS_SENSOR_LIS2DS12_LIS2DS12_H_
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#define ZEPHYR_DRIVERS_SENSOR_LIS2DS12_LIS2DS12_H_
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#include <zephyr/types.h>
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#include <drivers/sensor.h>
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#include <drivers/gpio.h>
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#define LIS2DS12_REG_WHO_AM_I 0x0F
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#define LIS2DS12_VAL_WHO_AM_I 0x43
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#define LIS2DS12_REG_CTRL1 0x20
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#define LIS2DS12_MASK_CTRL1_ODR (BIT(7) | BIT(6) | \
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BIT(5) | BIT(4))
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#define LIS2DS12_SHIFT_CTRL1_ODR 4
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#define LIS2DS12_MASK_CTRL1_FS (BIT(3) | BIT(2))
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#define LIS2DS12_SHIFT_CTRL1_FS 2
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#define LIS2DS12_MASK_CTRL1_HF_ODR BIT(1)
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#define LIS2DS12_MASK_CTRL1_HF_BDU BIT(0)
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#define LIS2DS12_REG_CTRL2 0x21
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#define LIS2DS12_SOFT_RESET 0x40
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#define LIS2DS12_REG_CTRL3 0x22
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#define LIS2DS12_SHIFT_LIR 0x02
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#define LIS2DS12_MASK_LIR 0x04
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#define LIS2DS12_REG_CTRL4 0x23
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#define LIS2DS12_SHIFT_INT1_DRDY 0x00
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#define LIS2DS12_MASK_INT1_DRDY 0x01
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#define LIS2DS12_REG_OUT_T 0x26
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#define LIS2DS12_REG_STATUS 0x27
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#define LIS2DS12_INT_DRDY 0x01
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#define LIS2DS12_REG_OUTX_L 0x28
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#define LIS2DS12_REG_OUTX_H 0x29
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#define LIS2DS12_REG_OUTY_L 0x2A
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#define LIS2DS12_REG_OUTY_H 0x2B
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#define LIS2DS12_REG_OUTZ_L 0x2C
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#define LIS2DS12_REG_OUTZ_H 0x2D
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#if (CONFIG_LIS2DS12_ODR == 0)
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#define LIS2DS12_ODR_RUNTIME 1
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#define LIS2DS12_DEFAULT_ODR 0
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#else
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#define LIS2DS12_DEFAULT_ODR (CONFIG_LIS2DS12_ODR << 4)
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#endif
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/* Accel sensor sensitivity unit is 0.061 mg/LSB */
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#define GAIN_XL (61LL / 1000.0)
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#if CONFIG_LIS2DS12_FS == 0
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#define LIS2DS12_FS_RUNTIME 1
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#define LIS2DS12_DEFAULT_FS (0 << 2)
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#define LIS2DS12_DEFAULT_GAIN GAIN_XL
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#elif CONFIG_LIS2DS12_FS == 2
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#define LIS2DS12_DEFAULT_FS (0 << 2)
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#define LIS2DS12_DEFAULT_GAIN GAIN_XL
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#elif CONFIG_LIS2DS12_FS == 4
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#define LIS2DS12_DEFAULT_FS (2 << 2)
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#define LIS2DS12_DEFAULT_GAIN (2.0 * GAIN_XL)
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#elif CONFIG_LIS2DS12_FS == 8
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#define LIS2DS12_DEFAULT_FS (3 << 2)
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#define LIS2DS12_DEFAULT_GAIN (4.0 * GAIN_XL)
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#elif CONFIG_LIS2DS12_FS == 16
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#define LIS2DS12_DEFAULT_FS (1 << 2)
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#define LIS2DS12_DEFAULT_GAIN (8.0 * GAIN_XL)
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#else
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#error "Bad LIS2DS12 FS value (should be 0, 2, 4, 8, 16)"
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#endif
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struct lis2ds12_config {
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char *comm_master_dev_name;
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int (*bus_init)(const struct device *dev);
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#ifdef CONFIG_LIS2DS12_TRIGGER
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const char *irq_port;
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gpio_pin_t irq_pin;
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gpio_dt_flags_t irq_flags;
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#endif
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};
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struct lis2ds12_data;
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struct lis2ds12_transfer_function {
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int (*read_data)(struct lis2ds12_data *data, uint8_t reg_addr,
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uint8_t *value, uint8_t len);
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int (*write_data)(struct lis2ds12_data *data, uint8_t reg_addr,
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uint8_t *value, uint8_t len);
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int (*read_reg)(struct lis2ds12_data *data, uint8_t reg_addr,
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uint8_t *value);
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int (*write_reg)(struct lis2ds12_data *data, uint8_t reg_addr,
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uint8_t value);
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int (*update_reg)(struct lis2ds12_data *data, uint8_t reg_addr,
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uint8_t mask, uint8_t value);
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};
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struct lis2ds12_data {
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const struct device *comm_master;
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int sample_x;
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int sample_y;
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int sample_z;
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float gain;
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const struct lis2ds12_transfer_function *hw_tf;
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#ifdef CONFIG_LIS2DS12_TRIGGER
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const struct device *gpio;
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struct gpio_callback gpio_cb;
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struct sensor_trigger data_ready_trigger;
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sensor_trigger_handler_t data_ready_handler;
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const struct device *dev;
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#if defined(CONFIG_LIS2DS12_TRIGGER_OWN_THREAD)
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K_KERNEL_STACK_MEMBER(thread_stack, CONFIG_LIS2DS12_THREAD_STACK_SIZE);
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struct k_thread thread;
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struct k_sem trig_sem;
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#elif defined(CONFIG_LIS2DS12_TRIGGER_GLOBAL_THREAD)
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struct k_work work;
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#endif
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#endif /* CONFIG_LIS2DS12_TRIGGER */
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};
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int lis2ds12_spi_init(const struct device *dev);
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int lis2ds12_i2c_init(const struct device *dev);
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#ifdef CONFIG_LIS2DS12_TRIGGER
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int lis2ds12_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 lis2ds12_trigger_init(const struct device *dev);
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#endif
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#endif /* ZEPHYR_DRIVERS_SENSOR_LIS2DS12_LIS2DS12_H_ */
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