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#define ADXL345_LOW_POWER_MODE

// Chip Address
#define ADXL345_ADDRESS                 (0x53)    // Assumes ALT address pin low

// Register Defines
#define ADXL345_REG_DEVID               (0x00)    // Device ID
#define ADXL345_REG_THRESH_TAP          (0x1D)    // Tap threshold
#define ADXL345_REG_OFSX                (0x1E)    // X-axis offset
#define ADXL345_REG_OFSY                (0x1F)    // Y-axis offset
#define ADXL345_REG_OFSZ                (0x20)    // Z-axis offset
#define ADXL345_REG_DUR                 (0x21)    // Tap duration
#define ADXL345_REG_LATENT              (0x22)    // Tap latency
#define ADXL345_REG_WINDOW              (0x23)    // Tap window
#define ADXL345_REG_THRESH_ACT          (0x24)    // Activity threshold
#define ADXL345_REG_THRESH_INACT        (0x25)    // Inactivity threshold
#define ADXL345_REG_TIME_INACT          (0x26)    // Inactivity time
#define ADXL345_REG_ACT_INACT_CTL       (0x27)    // Axis enable control for activity and inactivity detection
#define ADXL345_REG_THRESH_FF           (0x28)    // Free-fall threshold
#define ADXL345_REG_TIME_FF             (0x29)    // Free-fall time
#define ADXL345_REG_TAP_AXES            (0x2A)    // Axis control for single/double tap
#define ADXL345_REG_ACT_TAP_STATUS      (0x2B)    // Source for single/double tap
#define ADXL345_REG_BW_RATE             (0x2C)    // Data rate and power mode control
#define ADXL345_REG_POWER_CTL           (0x2D)    // Power-saving features control
#define ADXL345_REG_INT_ENABLE          (0x2E)    // Interrupt enable control
#define ADXL345_REG_INT_MAP             (0x2F)    // Interrupt mapping control
#define ADXL345_REG_INT_SOURCE          (0x30)    // Source of interrupts
#define ADXL345_REG_DATA_FORMAT         (0x31)    // Data format control
#define ADXL345_REG_DATAX0              (0x32)    // X-axis data 0
#define ADXL345_REG_DATAX1              (0x33)    // X-axis data 1
#define ADXL345_REG_DATAY0              (0x34)    // Y-axis data 0
#define ADXL345_REG_DATAY1              (0x35)    // Y-axis data 1
#define ADXL345_REG_DATAZ0              (0x36)    // Z-axis data 0
#define ADXL345_REG_DATAZ1              (0x37)    // Z-axis data 1
#define ADXL345_REG_FIFO_CTL            (0x38)    // FIFO control
#define ADXL345_REG_FIFO_STATUS         (0x39)    // FIFO status

#define ADXL345_MG2G_MULTIPLIER                 (0.004)   // 4mg per lsb

#define ADXL_BYTE_READ                                  (0x80)
#define ADXL_BYTE_WRITE                                 (0x80)
#define ADXL_MULTI_BYTE_READ                    (0xC0)

// Register values for ADXL345_REG_BW_RATE
typedef enum
{
#ifndef ADXL345_LOW_POWER_MODE
    ADXL345_DATARATE_3200_HZ    = 0xF, // 1600Hz Bandwidth   140µA IDD
    ADXL345_DATARATE_1600_HZ    = 0xE, //  800Hz Bandwidth    90µA IDD
    ADXL345_DATARATE_800_HZ     = 0xD, //  400Hz Bandwidth   140µA IDD
    ADXL345_DATARATE_6_25HZ     = 0x6, // 3.13Hz Bandwidth    45µA IDD
    ADXL345_DATARATE_3_13_HZ    = 0x5, // 1.56Hz Bandwidth    40µA IDD
    ADXL345_DATARATE_1_56_HZ    = 0x4, // 0.78Hz Bandwidth    34µA IDD
    ADXL345_DATARATE_0_78_HZ    = 0x3, // 0.39Hz Bandwidth    23µA IDD
    ADXL345_DATARATE_0_39_HZ    = 0x2, // 0.20Hz Bandwidth    23µA IDD
    ADXL345_DATARATE_0_20_HZ    = 0x1, // 0.10Hz Bandwidth    23µA IDD
    ADXL345_DATARATE_0_10_HZ    = 0x0, // 0.05Hz Bandwidth    23µA IDD (default value)
#endif
    ADXL345_DATARATE_400_HZ     = 0xC, //  200Hz Bandwidth   140µA IDD / 90uA LP
    ADXL345_DATARATE_200_HZ     = 0xB, //  100Hz Bandwidth   140µA IDD / 60uA LP
    ADXL345_DATARATE_100_HZ     = 0xA, //   50Hz Bandwidth   140µA IDD / 50uA LP
    ADXL345_DATARATE_50_HZ      = 0x9, //   25Hz Bandwidth    90µA IDD / 45uA LP
    ADXL345_DATARATE_25_HZ      = 0x8, // 12.5Hz Bandwidth    60µA IDD / 40uA LP
    ADXL345_DATARATE_12_5_HZ    = 0x7  // 6.25Hz Bandwidth    50µA IDD / 35uA LP
} dataRate_t;

// Register values for ADXL345_REG_DATA_FORMAT
typedef enum
{
    ADXL345_RANGE_16_G          = 0x3,   // +/- 16g
    ADXL345_RANGE_8_G           = 0x2,   // +/- 8g
    ADXL345_RANGE_4_G           = 0x1,   // +/- 4g
    ADXL345_RANGE_2_G           = 0x0    // +/- 2g (default value)
} range_t;

unsigned char ADXLInit(void);
void ADXLStandbyOn(void);
void ADXLStandbyOff(void);
void ADXLInitInterrupts(void);
void ADXLClearInterrupts(void);
void ADXLRead(int *x, int *y, int *z);
void ADXLSetRange(range_t range);
void ADXLSetDataRate(dataRate_t rate);