/* ----------------------------------------------------------------------------
 *         ATMEL Microcontroller Software Support 
 * ----------------------------------------------------------------------------
 * Copyright (c) 2008, Atmel Corporation
 *
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 */
 
//------------------------------------------------------------------------------
/// \unit
///
/// This file contains apis and definitions for tilt sensing.
///
//------------------------------------------------------------------------------
 
#ifndef DV_ACCELEROMETER_H
#define DV_ACCELEROMETER_H

#include "dfm_entry.h"
 
#define ACC_SHIFT 0                           //!< Accelerometer filtering value
#define ACC_ZERO  (0x7FF >> ACC_SHIFT)        //!< Accelerometer 0 value 0x1000/2
#define ACC_1G    (0x223 >> ACC_SHIFT)        //!< Accelerometer 1G value 2.09/3.3 * 0x1000 delta 1g

#define ACC_ZERO_X  ACC_ZERO
#define ACC_ZERO_Y  ACC_ZERO
#define ACC_ZERO_Z  ACC_ZERO

#define ACC_AMPLITUDE_UPPER  (ACC_1G*ACC_1G*1.01)
#define ACC_AMPLITUDE_LOWER  (ACC_1G*ACC_1G*0.99)

#define  DV_Accelerometer_Unchanged  0      //!< default unchanged direction
#define  DV_Accelerometer_normal_up  1      //!< normal up
#define  DV_Accelerometer_up         2      //!< up 
#define  DV_Accelerometer_down       3      //!< down
#define  DV_Accelerometer_left       4      //!< left
#define  DV_Accelerometer_right      5      //!< right

#define  DV_Accelerometer_up_right      6   //!< up and right
#define  DV_Accelerometer_up_left       7   //!< up and left
#define  DV_Accelerometer_down_left     8   //!< down and left
#define  DV_Accelerometer_down_right    9   //!< down and right

#define DIR_UNCHANGED              0
#define DIR_HORIZIONTAL_UP         1
#define DIR_HORIZIONTAL_DOWN       2
#define DIR_VERTICAL_UP            3
#define DIR_VERTICAL_DOWN          4

typedef struct { 
  int x; 
  int y; 
  int z; 
} xyz_t;


typedef struct {
  xyz_t m;                                  //!< immediate acceleration   
  xyz_t k;                                  //!< calibration basis
  xyz_t ak;                                 //!< acceleration difference
 } acc_t;

extern int gDir;

extern TInputEntry gAccEntry ;
extern unsigned int gLcdRefreshFlag;
extern int DV_ACCELEROMETER_Init(void);
extern void DV_Accelerometer_Turn();
extern int DV_Check_AccStatus();
extern void DV_ACCELEROMETER_Measure(void);

#endif