sensors.h

/*
 * Copyright (C) 2008 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef ANDROID_SENSORS_H
#define ANDROID_SENSORS_H

#include <stdint.h>
#include <errno.h>
#include <sys/cdefs.h>
#include <sys/types.h>

#include <linux/input.h>

#include <hardware/hardware.h>
#include <hardware/sensors.h>

__BEGIN_DECLS

/*****************************************************************************/

#define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))

#define ID_A  (0)
#define ID_M  (1)
#define ID_O  (2)

#define EVENT_TYPE_ACCEL_X          ABS_X
#define EVENT_TYPE_ACCEL_Y          ABS_Y
#define EVENT_TYPE_ACCEL_Z          ABS_Z

#define EVENT_TYPE_YAW              ABS_RX
#define EVENT_TYPE_PITCH            ABS_RY
#define EVENT_TYPE_ROLL             ABS_RZ
#define EVENT_TYPE_ORIENT_STATUS    ABS_RUDDER

#define EVENT_TYPE_MAGV_X           ABS_HAT0X
#define EVENT_TYPE_MAGV_Y           ABS_HAT0Y
#define EVENT_TYPE_MAGV_Z           ABS_BRAKE

// 720 LSG = 1G
#define LSG                         (720.0f)
#define NUMOFACCDATA                8

// conversion of acceleration data to SI units (m/s^2)
#define RANGE_A                     (8*GRAVITY_EARTH)
#define RESOLUTION_A                (GRAVITY_EARTH/32768.0f)
#define CONVERT_A                   (RESOLUTION_A)
#define CONVERT_A_X                 (CONVERT_A)
#define CONVERT_A_Y                 (CONVERT_A)
#define CONVERT_A_Z                 (CONVERT_A)

// conversion of magnetic data to uT units
#define CONVERT_M                   (100.0f/32768.0f)
#define CONVERT_M_X                 (CONVERT_M)
#define CONVERT_M_Y                 (CONVERT_M)
#define CONVERT_M_Z                 (CONVERT_M)

/* conversion of orientation data to degree units */
#define CONVERT_O                   (360.0f/65536.0f)
#define CONVERT_O_A                 (CONVERT_O)
#define CONVERT_O_P                 (CONVERT_O)
#define CONVERT_O_R                 (CONVERT_O)

#define SENSOR_STATE_MASK           (0x7FFF)

/*****************************************************************************/

__END_DECLS

#endif  // ANDROID_SENSORS_H