forked from Archive/PX4-Autopilot
112 lines
3.2 KiB
C
112 lines
3.2 KiB
C
/****************************************************************************
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*
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* Copyright (C) 2012 PX4 Development Team. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name PX4 nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/**
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* @file Magnetometer driver interface.
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*/
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#ifndef _DRV_MAG_H
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#define _DRV_MAG_H
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#include <stdint.h>
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#include <sys/ioctl.h>
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#include "drv_sensor.h"
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#include "drv_orb_dev.h"
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#define MAG_DEVICE_PATH "/dev/mag"
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/**
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* mag report structure. Reads from the device must be in multiples of this
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* structure.
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*
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* Output values are in gauss.
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*/
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struct mag_report {
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uint64_t timestamp;
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float x;
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float y;
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float z;
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float range_ga;
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float scaling;
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int16_t x_raw;
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int16_t y_raw;
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int16_t z_raw;
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};
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/** mag scaling factors; Vout = (Vin * Vscale) + Voffset */
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struct mag_scale {
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float x_offset;
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float x_scale;
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float y_offset;
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float y_scale;
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float z_offset;
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float z_scale;
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};
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/*
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* ObjDev tag for raw magnetometer data.
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*/
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ORB_DECLARE(sensor_mag);
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/*
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* ioctl() definitions
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*/
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#define _MAGIOCBASE (0x2400)
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#define _MAGIOC(_n) (_IOC(_MAGIOCBASE, _n))
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/** set the mag internal sample rate to at least (arg) Hz */
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#define MAGIOCSSAMPLERATE _MAGIOC(0)
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/** set the mag internal lowpass filter to no lower than (arg) Hz */
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#define MAGIOCSLOWPASS _MAGIOC(1)
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/** set the mag scaling constants to the structure pointed to by (arg) */
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#define MAGIOCSSCALE _MAGIOC(2)
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/** copy the mag scaling constants to the structure pointed to by (arg) */
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#define MAGIOCGSCALE _MAGIOC(3)
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/** set the measurement range to handle (at least) arg Gauss */
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#define MAGIOCSRANGE _MAGIOC(4)
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/** perform self-calibration, update scale factors to canonical units */
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#define MAGIOCCALIBRATE _MAGIOC(5)
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/** excite strap */
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#define MAGIOCEXSTRAP _MAGIOC(6)
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#endif /* _DRV_MAG_H */
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