95 lines
2.4 KiB
C
95 lines
2.4 KiB
C
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/* Copyright 2018 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* LIS2MSL magnetometer module for Chrome EC */
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#ifndef __CROS_EC_MAG_LIS2MDL_H
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#define __CROS_EC_MAG_LIS2MDL_H
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#include "accelgyro.h"
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#include "mag_cal.h"
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#include "stm_mems_common.h"
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/*
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* 8-bit address is 0011110Wb where the last bit represents whether the
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* operation is a read or a write.
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*/
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#define LIS2MDL_ADDR_FLAGS 0x1e
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#define LIS2MDL_STARTUP_MS 10
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/* Registers */
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#define LIS2MDL_WHO_AM_I_REG 0x4f
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#define LIS2MDL_CFG_REG_A_ADDR 0x60
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#define LIS2MDL_INT_CTRL_REG 0x63
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#define LIS2MDL_STATUS_REG 0x67
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#define LIS2MDL_OUT_REG 0x68
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#define LIS2MDL_WHO_AM_I 0x40
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#define LIS2MDL_FLAG_TEMP_COMPENSATION 0x80
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#define LIS2MDL_FLAG_REBOOT 0x40
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#define LIS2MDL_FLAG_SW_RESET 0x20
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#define LIS2MDL_FLAG_LOW_POWER 0x10
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#define LIS2MDL_ODR_50HZ 0x08
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#define LIS2MDL_ODR_20HZ 0x04
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#define LIS2MDL_ODR_10HZ 0x00
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#define LIS2MDL_MODE_IDLE 0x03
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#define LIS2MDL_MODE_SINGLE 0x01
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#define LIS2MDL_MODE_CONT 0x00
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#define LIS2MDL_ODR_MODE_MASK 0x8f
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#define LIS2MDL_X_DIRTY 0x01
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#define LIS2MDL_Y_DIRTY 0x02
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#define LIS2MDL_Z_DIRTY 0x04
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#define LIS2MDL_XYZ_DIRTY 0x08
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#define LIS2MDL_XYZ_DIRTY_MASK 0x0f
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#define LIS2DSL_RESOLUTION 16
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/*
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* Maximum sensor data range (milligauss):
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* Spec is 1.5 mguass / LSB, so 0.15 uT / LSB.
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* Calibration code is set to 16LSB/ut, [0.0625 uT/LSB]
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* Apply a multiplier to change the unit
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*/
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#define LIS2MDL_RATIO(_in) (((_in) * 24) / 10)
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struct lis2mdl_private_data {
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/* lsm6dsm_data union requires cal be first element */
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struct mag_cal_t cal;
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#ifndef CONFIG_LSM6DSM_SEC_I2C
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struct stprivate_data data;
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#endif
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#ifdef CONFIG_MAG_BMI160_LIS2MDL
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intv3_t hn; /* last sample for offset compensation */
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int hn_valid;
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#endif
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};
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#ifndef CONFIG_LSM6DSM_SEC_I2C
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#define LIS2MDL_ST_DATA(g) (&((g).data))
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#ifdef CONFIG_MAG_CALIBRATE
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#define LIS2MDL_CAL(_s) \
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(&(DOWNCAST(s->drv_data, struct lis2mdl_private_data, data)->cal))
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#endif
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#endif
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#define LIS2MDL_ODR_MIN_VAL 10000
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#define LIS2MDL_ODR_MAX_VAL 50000
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#if (CONFIG_EC_MAX_SENSOR_FREQ_MILLIHZ <= LIS2MDL_ODR_MAX_VAL)
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#error "EC too slow for magnetometer"
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#endif
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void lis2mdl_normalize(const struct motion_sensor_t *s,
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intv3_t v,
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uint8_t *data);
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extern const struct accelgyro_drv lis2mdl_drv;
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#endif /* __CROS_EC_MAG_LIS2MDL_H */
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