#ifndef _DS_3231_H_
#define _DS_3231_H_

#include "mbed.h"
#include "main.h"

#define DS3231_ADDR 0x68

typedef union {
    struct {
        uint8_t Value : 7;
        uint8_t       : 1;
    };
    uint8_t AS_BYTE;
} T_SECOND;

typedef union {
    struct {
        uint8_t Value : 7;
        uint8_t       : 1;
    };
    uint8_t AS_BYTE;
} T_MINUTE;

typedef union {
    struct {
        uint8_t Value : 5;
        uint8_t nAM   : 1;
        uint8_t n24   : 1;
        uint8_t       : 1;
    };
    uint8_t AS_BYTE;
} T_HOUR;

typedef union {
    struct {
        uint8_t Value : 3;
        uint8_t       : 5;
    };
    uint8_t AS_BYTE;
} T_DAY;

typedef union {
    struct {
        uint8_t Value : 6;
        uint8_t       : 2;
    };
    uint8_t AS_BYTE;
} T_DATE;

typedef union {
    struct {
        uint8_t Value   : 5;
        uint8_t         : 2;
        uint8_t Century : 1;
    };
    uint8_t AS_BYTE;
} T_MONTH;

typedef union {
    struct {
        uint8_t Value : 8;
    };
    uint8_t AS_BYTE;
} T_YEAR;

typedef union {
    struct {
        uint8_t Value : 7;
        uint8_t M1    : 1;
    };
    uint8_t AS_BYTE;
} A_SECOND;

typedef union {
    struct {
        uint8_t Value : 7;
        uint8_t M2    : 1;
    };
    uint8_t AS_BYTE;
} A_MINUTE;

typedef union {
    struct {
        uint8_t Value : 5;
        uint8_t nAM   : 1;
        uint8_t n24   : 1;
        uint8_t M3    : 1;
    };
    uint8_t AS_BYTE;
} A_HOUR;

typedef union {
    struct {
        union {
            struct {
                uint8_t Value : 4;
                uint8_t       : 2;
            } Day;
            struct {
                uint8_t Value : 6;
            } Date;
        };
        uint8_t nDT : 1;
        uint8_t M4  : 1;
    };
    uint8_t AS_BYTE;
} A_DAY_DATE;

typedef union {
    struct {
        uint8_t A1IE  : 1;
        uint8_t A2IE  : 1;
        uint8_t INTCN : 1;
        uint8_t RS1   : 1;
        uint8_t RS2   : 1;
        uint8_t CONV  : 1;
        uint8_t BBSQW : 1;
        uint8_t nEOSC : 1;
    };
    uint8_t AS_BYTE;
} CONTROL_1;

typedef union {
    struct {
        uint8_t A1F     : 1;
        uint8_t A2F     : 1;
        uint8_t BSY     : 1;
        uint8_t EN32KHZ : 1;
        uint8_t         : 3;
        uint8_t OSF     : 1;
    };
    uint8_t AS_BYTE;
} CONTROL_2;

typedef union {
    struct {
        uint8_t Value : 7;
        uint8_t Sign  : 1;
    };
    uint8_t AS_BYTE;
} AGING_OFFSET;

typedef union {
    struct {
        uint8_t Value : 7;
        uint8_t Sign  : 1;
    };
    uint8_t AS_BYTE;
} TEMP_MSB;

typedef union {
    struct {
        uint8_t       : 6;
        uint8_t Value : 2;
    };
    uint8_t AS_DATA;
} TEMP_LSB;

typedef union {
    struct {
        T_SECOND Second;            // 0x00
        T_MINUTE Minute;            // 0x01
        T_HOUR Hour;                // 0x02
        T_DAY Day;                  // 0x03
        T_DATE Date;                // 0x04
        T_MONTH Month;              // 0x05
        T_YEAR Year;                // 0x06
        A_SECOND A1_Second;         // 0x07
        A_MINUTE A1_Minute;         // 0x08
        A_HOUR A1_Hour;             // 0x09
        A_DAY_DATE A1_Day_Date;     // 0x0A
        A_MINUTE A2_Minute;         // 0x0B
        A_HOUR A2_Hour;             // 0x0C
        A_DAY_DATE A2_Day_Date;     // 0x0D
        CONTROL_1 Control_1;        // 0x0E
        CONTROL_2 Control_2;        // 0x0F
        AGING_OFFSET Aging_Offset;  // 0x10
        TEMP_MSB Temp_MSB;          // 0x11
        TEMP_LSB Temp_LSB;          // 0x12
    };
} DS3231_REGS;

void DS3231_Init(void);

#endif