111 lines
2.8 KiB
C
111 lines
2.8 KiB
C
#ifndef LIS3DH_H
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#define LIS3DH_H
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#include <stdint.h>
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/* rates */
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#define LIS3DH_ODR_POWEROFF 0b0000
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#define LIS3DH_ODR_1_HZ 0b0001
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#define LIS3DH_ODR_10_HZ 0b0010
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#define LIS3DH_ODR_25_HZ 0b0011
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#define LIS3DH_ODR_50_HZ 0b0100
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#define LIS3DH_ODR_100_HZ 0b0101
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#define LIS3DH_ODR_200_HZ 0b0110
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#define LIS3DH_ODR_400_HZ 0b0111
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#define LIS3DH_ODR_NORM_1344_HZ 0b1001
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#define LIS3DH_ODR_LP_1600_HZ 0b1000
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#define LIS3DH_ODR_LP_5376_HZ 0b1001
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/* range/sens */
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#define LIS3DH_FS_2G 0b00
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#define LIS3DH_FS_4G 0b01
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#define LIS3DH_FS_8G 0b10
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#define LIS3DH_FS_16G 0b11
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/* operating modes */
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#define LIS3DH_MODE_HR 0b00
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#define LIS3DH_MODE_LP 0b01
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#define LIS3DH_MODE_NORMAL 0b10
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/* FIFO modes */
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#define LIS3DH_FIFO_MODE_BYPASS 0b00
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#define LIS3DH_FIFO_MODE_NORMAL 0b01 /* "FIFO" */
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#define LIS3DH_FIFO_MODE_STREAM 0b10
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#define LIS3DH_FIFO_MODE_STREAM_TO_FIFO 0b11
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/* FIFO trigger pin selection */
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#define LIS3DH_FIFO_TRIG_INT1 0b0
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#define LIS3DH_FIFO_TRIG_INT2 0b1
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/* filter modes */
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/* this one is reset by reading REFERENCE (0x26) */
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#define LIS3DH_FILTER_MODE_NORMAL 0b00
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#define LIS3DH_FILTER_MODE_REFERENCE 0b01
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#define LIS3DH_FILTER_MODE_NORMAL2 0b10 /* same as 00? */
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#define LIS3DH_FILTER_MODE_AUTORESET 0b11
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/* filter cutoff */
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/* unfortunately, there is only a table for low-power mode,
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and the actual cutoff-frequency depends on the ODR.
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Naming scheme after ODR@400Hz
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AN3308 > section 4.3.1.1 */
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#define LIS3DH_FILTER_CUTOFF_8 0b00 /* highest freq */
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#define LIS3DH_FILTER_CUTOFF_4 0b01
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#define LIS3DH_FILTER_CUTOFF_2 0b10
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#define LIS3DH_FILTER_CUTOFF_1 0b11 /* lowest freq */
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struct lis3dh_device {
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int (*init)(void);
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int (*read)(uint8_t reg, uint8_t *dst, uint32_t size);
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int (*write)(uint8_t reg, uint8_t value);
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int (*sleep)(uint32_t dur_us);
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int (*deinit)(void);
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};
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struct lis3dh_filter_config {
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uint8_t mode;
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uint8_t cutoff;
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uint8_t fds; /* 1 -> use this filter */
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uint8_t hpclick; /* 1 -> use for "CLICK" function */
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uint8_t ia2; /* 1 -> use for AOI func on INT 2 */
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uint8_t ia1; /* 1 -> use for AOI func on INT 1 */
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};
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struct lis3dh_fifo_config {
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uint8_t fth;
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uint8_t trig;
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uint8_t mode;
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};
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struct lis3dh_config {
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uint8_t rate; /* ODR */
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uint8_t range; /* FS */
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uint8_t mode; /* LPen and HR */
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struct lis3dh_fifo_config fifo;
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struct lis3dh_filter_config filter;
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};
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struct lis3dh_acceleration {
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double x;
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double y;
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double z;
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};
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struct lis3dh {
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struct lis3dh_device dev;
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struct lis3dh_config cfg;
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struct lis3dh_acceleration acc;
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};
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typedef struct lis3dh lis3dh_t;
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int lis3dh_init(lis3dh_t *lis3dh);
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int lis3dh_deinit(lis3dh_t *lis3dh);
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int lis3dh_configure(lis3dh_t *lis3dh);
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int lis3dh_poll(lis3dh_t *lis3dh);
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int lis3dh_read(lis3dh_t *lis3dh);
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int lis3dh_poll_fifo(lis3dh_t *lis3dh);
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int lis3dh_read_fifo(lis3dh_t *lis3dh);
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#endif |