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bd359d09c8
This patch implements BMM150 driver with polling mode and its tested with original BMM150 sensor hardware. Driver works on I2C interface as of now. Following datasheet is taken as reference while developing driver. http://www.mouser.com/ds/2/783/BST-BMM150-DS001-01-786480.pdf Signed-off-by: Punit Vara <punit.vara@intel.com>
165 lines
4.3 KiB
C
165 lines
4.3 KiB
C
/* sensor_bmm150.h - header file for BMM150 Geomagnetic sensor driver */
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/*
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* Copyright (c) 2017 Intel Corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef _SENSOR_BMM150_H_
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#define _SENSOR_BMM150_H_
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#include <zephyr/types.h>
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#include <i2c.h>
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#include <stdint.h>
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#include <misc/util.h>
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#include <kernel.h>
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#include <device.h>
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#include <sensor.h>
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#include <misc/byteorder.h>
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#include <misc/__assert.h>
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#include <gpio.h>
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#define BMM150_REG_CHIP_ID 0x40
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#define BMM150_CHIP_ID_VAL 0x32
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#define BMM150_REG_X_L 0x42
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#define BMM150_REG_X_M 0x43
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#define BMM150_REG_Y_L 0x44
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#define BMM150_REG_Y_M 0x45
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#define BMM150_SHIFT_XY_L 3
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#define BMM150_REG_Z_L 0x46
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#define BMM150_REG_Z_M 0x47
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#define BMM150_SHIFT_Z_L 1
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#define BMM150_REG_RHALL_L 0x48
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#define BMM150_REG_RHALL_M 0x49
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#define BMM150_SHIFT_RHALL_L 2
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#define BMM150_REG_INT_STATUS 0x4A
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#define BMM150_REG_POWER 0x4B
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#define BMM150_MASK_POWER_CTL BIT(0)
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#define BMM150_REG_OPMODE_ODR 0x4C
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#define BMM150_MASK_OPMODE (BIT(2) | BIT(1))
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#define BMM150_SHIFT_OPMODE 1
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#define BMM150_MODE_NORMAL 0x00
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#define BMM150_MODE_FORCED 0x01
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#define BMM150_MODE_SLEEP 0x03
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#define BMM150_MASK_ODR (BIT(5) | BIT(4) | BIT(3))
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#define BMM150_SHIFT_ODR 3
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#define BMM150_REG_LOW_THRESH 0x4F
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#define BMM150_REG_HIGH_THRESH 0x50
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#define BMM150_REG_REP_XY 0x51
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#define BMM150_REG_REP_Z 0x52
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#define BMM150_REG_REP_DATAMASK 0xFF
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#define BMM150_REG_TRIM_START 0x5D
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#define BMM150_REG_TRIM_END 0x71
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#define BMM150_XY_OVERFLOW_VAL -4096
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#define BMM150_Z_OVERFLOW_VAL -16384
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#define BMM150_REGVAL_TO_REPXY(regval) (((regval) * 2) + 1)
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#define BMM150_REGVAL_TO_REPZ(regval) ((regval) + 1)
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#define BMM150_REPXY_TO_REGVAL(rep) (((rep) - 1) / 2)
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#define BMM150_REPZ_TO_REGVAL(rep) ((rep) - 1)
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#define BMM150_REG_INT 0x4D
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#define BMM150_REG_INT_DRDY 0x4E
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#define BMM150_MASK_DRDY_EN BIT(7)
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#define BMM150_SHIFT_DRDY_EN 7
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#define BMM150_DRDY_INT3 BIT(6)
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#define BMM150_MASK_DRDY_Z_EN BIT(5)
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#define BMM150_MASK_DRDY_Y_EN BIT(4)
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#define BMM150_MASK_DRDY_X_EN BIT(3)
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#define BMM150_MASK_DRDY_DR_POLARITY BIT(2)
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#define BMM150_SHIFT_DRDY_DR_POLARITY 2
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#define BMM150_MASK_DRDY_LATCHING BIT(1)
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#define BMM150_MASK_DRDY_INT3_POLARITY BIT(0)
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#define BMM150_I2C_ADDR CONFIG_BMM150_I2C_ADDR
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#if defined(CONFIG_BMM150_SAMPLING_REP_XY) || \
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defined(CONFIG_BMM150_SAMPLING_REP_Z)
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#define BMM150_SET_ATTR_REP
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#endif
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#if defined(CONFIG_BMM150_MAGN_SAMPLING_RATE_RUNTIME) || \
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defined(BMM150_MAGN_SET_ATTR_REP)
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#define BMM150_MAGN_SET_ATTR
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#endif
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struct bmm150_config {
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char *i2c_master_dev_name;
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u16_t i2c_slave_addr;
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};
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struct bmm150_trim_regs {
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s8_t x1;
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s8_t y1;
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u16_t reserved1;
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u8_t reserved2;
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s16_t z4;
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s8_t x2;
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s8_t y2;
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u16_t reserved3;
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s16_t z2;
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u16_t z1;
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u16_t xyz1;
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s16_t z3;
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s8_t xy2;
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u8_t xy1;
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} __packed;
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struct bmm150_data {
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struct device *i2c;
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struct k_sem sem;
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struct bmm150_trim_regs tregs;
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int rep_xy, rep_z, odr, max_odr;
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int sample_x, sample_y, sample_z;
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};
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enum bmm150_power_modes {
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BMM150_POWER_MODE_SUSPEND,
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BMM150_POWER_MODE_SLEEP,
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BMM150_POWER_MODE_NORMAL
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};
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enum bmm150_axis {
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BMM150_AXIS_X,
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BMM150_AXIS_Y,
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BMM150_AXIS_Z,
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BMM150_RHALL,
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BMM150_AXIS_XYZ_MAX = BMM150_RHALL,
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BMM150_AXIS_XYZR_MAX
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};
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enum bmm150_presets {
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BMM150_LOW_POWER_PRESET,
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BMM150_REGULAR_PRESET,
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BMM150_ENHANCED_REGULAR_PRESET,
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BMM150_HIGH_ACCURACY_PRESET
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};
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#if defined(CONFIG_BMM150_PRESET_LOW_POWER)
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#define BMM150_DEFAULT_PRESET BMM150LOW_POWER_PRESET
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#elif defined(CONFIG_BMM150_PRESET_REGULAR)
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#define BMM150_DEFAULT_PRESET BMM150_REGULAR_PRESET
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#elif defined(CONFIG_BMM150_PRESET_ENHANCED_REGULAR)
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#define BMM150_DEFAULT_PRESET BMM150_ENHANCED_REGULAR_PRESET
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#elif defined(CONFIG_BMM150_PRESET_HIGH_ACCURACY)
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#define BMM150_DEFAULT_PRESET BMM150_HIGH_ACCURACY_PRESET
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#endif
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#define SYS_LOG_DOMAIN "BMM150"
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#define SYS_LOG_LEVEL CONFIG_SYS_LOG_SENSOR_LEVEL
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#include <logging/sys_log.h>
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#endif /* __SENSOR_BMM150_H__ */
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