#include "config.h"

#include <avr/io.h>

#include "i2c.h"

#include "ds1307.h"

/***************************************************

Function To Read Internal Registers of DS1307

---------------------------------------------

address : Address of the register

data: value of register is copied to this.

Returns:

0= Failure

1= Success

***************************************************/

uint8_t DS1307Read(uint8_t address,uint8_t *data)

{

uint8_t res; //result

//Start

I2CStart();

//SLA+W (for dummy write to set register pointer)

res=I2CWriteByte(0b11010000); //DS1307 address + W

//Error

if(!res) return FALSE;

//Now send the address of required register

res=I2CWriteByte(address);

//Error

if(!res) return FALSE;

//Repeat Start

I2CStart();

//SLA + R

res=I2CWriteByte(0b11010001); //DS1307 Address + R

//Error

if(!res) return FALSE;

//Now read the value with NACK

res=I2CReadByte(data,0);

//Error

if(!res) return FALSE;

//STOP

I2CStop();

return TRUE;

}

/***************************************************

Function To Write Internal Registers of DS1307

---------------------------------------------

address : Address of the register

data: value to write.

Returns:

0= Failure

1= Success

***************************************************/

uint8_t DS1307Write(uint8_t address,uint8_t data)

{

uint8_t res; //result

//Start

I2CStart();

//SLA+W

res=I2CWriteByte(0b11010000); //DS1307 address + W

//Error

if(!res) return FALSE;

//Now send the address of required register

res=I2CWriteByte(address);

//Error

if(!res) return FALSE;

//Now write the value

res=I2CWriteByte(data);

//Error

if(!res) return FALSE;

//STOP

I2CStop();

return TRUE;

}