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      1 /*
      2  * Copyright (C) 2008 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef ANDROID_SENSORS_H
     18 #define ANDROID_SENSORS_H
     19 
     20 #include <stdint.h>
     21 #include <errno.h>
     22 #include <sys/cdefs.h>
     23 #include <sys/types.h>
     24 
     25 #include <linux/input.h>
     26 
     27 #include <hardware/hardware.h>
     28 #include <hardware/sensors.h>
     29 
     30 __BEGIN_DECLS
     31 
     32 /*****************************************************************************/
     33 
     34 #define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
     35 
     36 #define ID_A  (0)
     37 #define ID_M  (1)
     38 #define ID_O  (2)
     39 
     40 /*****************************************************************************/
     41 
     42 /*
     43  * The SENSORS Module
     44  */
     45 
     46 /*****************************************************************************/
     47 
     48 /* For ADXL346 */
     49 #define EVENT_TYPE_ACCEL_X          ABS_X
     50 #define EVENT_TYPE_ACCEL_Y          ABS_Y
     51 #define EVENT_TYPE_ACCEL_Z          ABS_Z
     52 #define EVENT_TYPE_ACCEL_STATUS     ABS_THROTTLE
     53 
     54 /* For AK8975 */
     55 #define EVENT_TYPE_MAGV_X           ABS_RX
     56 #define EVENT_TYPE_MAGV_Y           ABS_RY
     57 #define EVENT_TYPE_MAGV_Z           ABS_RZ
     58 #define EVENT_TYPE_MAGV_STATUS      ABS_RUDDER
     59 
     60 /* Fro AKM Algorithm */
     61 #define EVENT_TYPE_YAW              ABS_HAT0X
     62 #define EVENT_TYPE_PITCH            ABS_HAT0Y
     63 #define EVENT_TYPE_ROLL             ABS_HAT1X
     64 #define EVENT_TYPE_ORIENT_STATUS    ABS_HAT1Y
     65 
     66 
     67 /* conversion of acceleration data to SI units (m/s^2) */
     68 /* 720 LSB = 1G */
     69 #define LSG                         (256.0f)
     70 #define AKSC_LSG					(720.0f)
     71 #define CONVERT_A                   (GRAVITY_EARTH / LSG)
     72 
     73 /* conversion of magnetic data to uT units */
     74 #define CONVERT_M                   (0.06f)
     75 
     76 /* conversion of orientation data to degree units */
     77 #define CONVERT_O                   (0.015625f)
     78 
     79 #define SENSOR_STATE_MASK           (0x7FFF)
     80 
     81 /*****************************************************************************/
     82 
     83 __END_DECLS
     84 
     85 #endif  // ANDROID_SENSORS_H
     86