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#ifndef MCP79412RTC_h

#define MCP79412RTC_h

#include <Time.h>

#if defined(ARDUINO) && ARDUINO >= 100

#include <Arduino.h>

#else

#include <WProgram.h>

#endif

#if defined(__AVR_ATtiny44__) || defined(__AVR_ATtiny84__) || defined(__AVR_ATtiny45__) || defined(__AVR_ATtiny85__)

#define i2cBegin TinyWireM.begin

#define i2cBeginTransmission TinyWireM.beginTransmission

#define i2cEndTransmission TinyWireM.endTransmission

#define i2cRequestFrom TinyWireM.requestFrom

#define i2cRead TinyWireM.receive

#define i2cWrite TinyWireM.send

#elif ARDUINO >= 100

#define i2cBegin Wire.begin

#define i2cBeginTransmission Wire.beginTransmission

#define i2cEndTransmission Wire.endTransmission

#define i2cRequestFrom Wire.requestFrom

#define i2cRead Wire.read

#define i2cWrite Wire.write

#else

#define i2cBegin Wire.begin

#define i2cBeginTransmission Wire.beginTransmission

#define i2cEndTransmission Wire.endTransmission

#define i2cRequestFrom Wire.requestFrom

#define i2cRead Wire.receive

#define i2cWrite Wire.send

#endif

#define RTC_ADDR 0x6F

#define EEPROM_ADDR 0x57

#define TIME_REG 0x00 //7 registers, Seconds, Minutes, Hours, DOW, Date, Month, Year

#define DAY_REG 0x03 //the RTC Day register contains the OSCON, VBAT, and VBATEN bits

#define YEAR_REG 0x06 //RTC year register

#define CTRL_REG 0x07 //control register

#define CALIB_REG 0x08 //calibration register

#define UNLOCK_ID_REG 0x09 //unlock ID register

#define ALM0_REG 0x0A //alarm 0, 6 registers, Seconds, Minutes, Hours, DOW, Date, Month

#define ALM1_REG 0x11 //alarm 1, 6 registers, Seconds, Minutes, Hours, DOW, Date, Month

#define ALM0_DAY 0x0D //DOW register has alarm config/flag bits

#define PWRDWN_TS_REG 0x18 //power-down timestamp, 4 registers, Minutes, Hours, Date, Month

#define PWRUP_TS_REG 0x1C //power-up timestamp, 4 registers, Minutes, Hours, Date, Month

#define TIMESTAMP_SIZE 8 //number of bytes in the two timestamp registers

#define SRAM_START_ADDR 0x20 //first SRAM address

#define SRAM_SIZE 64 //number of bytes of SRAM

#define EEPROM_SIZE 128 //number of bytes of EEPROM

#define EEPROM_PAGE_SIZE 8 //number of bytes on an EEPROM page

#define UNIQUE_ID_ADDR 0xF0 //starting address for unique ID

#define UNIQUE_ID_SIZE 8 //number of bytes in unique ID

#define OUT 7 //sets logic level on MFP when not used as square wave output

#define SQWE 6 //set to enable square wave output

#define ALM1 5 //alarm 1 is active

#define ALM0 4 //alarm 0 is active

#define EXTOSC 3 //set to drive the RTC registers from an external oscillator instead of a crystal

#define RS2 2 //RS2:0 set square wave output frequency: 0==1Hz, 1==4096Hz, 2==8192Hz, 3=32768Hz

#define RS1 1

#define RS0 0

enum {SQWAVE_1_HZ, SQWAVE_4096_HZ, SQWAVE_8192_HZ, SQWAVE_32768_HZ, SQWAVE_NONE};

#define ST 7 //Seconds register (TIME_REG) oscillator start/stop bit, 1==Start, 0==Stop

#define HR1224 6 //Hours register (TIME_REG+2) 12 or 24 hour mode (24 hour mode==0)

#define AMPM 5 //Hours register (TIME_REG+2) AM/PM bit for 12 hour mode

#define OSCON 5 //Day register (TIME_REG+3) oscillator running (set and cleared by hardware)

#define VBAT 4 //Day register (TIME_REG+3) set by hardware when Vcc fails and RTC runs on battery.

//VBAT is cleared by software, clearing VBAT also clears the timestamp registers

#define VBATEN 3 //Day register (TIME_REG+3) VBATEN==1 enables backup battery, VBATEN==0 disconnects the VBAT pin (e.g. to save battery)

#define LP 5 //Month register (TIME_REG+5) leap year bit

#define ALMPOL 7 //Alarm Polarity: Defines the logic level for the MFP when an alarm is triggered.

#define ALMC2 6 //Alarm configuration bits determine how alarms match. See ALM_MATCH defines below.

#define ALMC1 5

#define ALMC0 4

#define ALMIF 3 //Alarm Interrupt Flag: Set by hardware when an alarm was triggered, cleared by software.

enum {ALM_MATCH_SECONDS, ALM_MATCH_MINUTES, ALM_MATCH_HOURS, ALM_MATCH_DAY, ALM_MATCH_DATE, ALM_RESERVED_5, ALM_RESERVED_6, ALM_MATCH_DATETIME, ALM_DISABLE};

#define ALARM_0 0 //constants for calling functions

#define ALARM_1 1

class MCP79412RTC

};

extern MCP79412RTC RTC;

#endif