#ifdef atmega168

#include "lg_rtc.h"

bool ClockInit()

{

//Initialize DS1307 Interface

DS1307Init();

//Clear CH bit of RTC

#define CH 7

uint8_t temp;

if(!DS1307Read(0x00,&temp)) return 0;

//Clear CH Bit

temp&=(~(1<<CH));//ch becomes 0

if(!DS1307Write(0x00,temp)) return 0;

//Set 12 Hour Mode

if(!DS1307Read(0x02,&temp)) return 0;

//Set 12Hour BIT

temp|=(0b01000000);

//Write Back to DS1307

if(!DS1307Write(0x02,temp)) return 0;

return 1;

}

uint8_t GetSecond()

{

uint8_t sec,temp;

//Read the Second Register

DS1307Read(0x00,&temp);

sec=(((temp & 0b01110000)>>4)*10)+(temp & 0b00001111);

return sec;

}

uint8_t GetMinute()

{

return GetSecond();

uint8_t min,temp;

//Read the Minute Register

DS1307Read(0x01,&temp);

min=(((temp & 0b01110000)>>4)*10)+(temp & 0b00001111);

return min;

}

uint8_t GetHour()

{

uint8_t hr,temp;

//Read the Hour Register

DS1307Read(0x02,&temp);

hr=(((temp & 0b00010000)>>4)*10)+(temp & 0b00001111);//for 12-hour

return hr;

}

//0 is AM, 1 is PM

uint8_t GetAmPm()

{

uint8_t am_pm,temp;

//Read the Hour Register

DS1307Read(0x02,&temp);

am_pm=(temp & 0b00100000)>>5;

return am_pm;

}

uint8_t GetDay()

{

uint8_t day, temp;

DS1307Read(0x03,&temp);

day=(temp & 0b00000111);

return day;

}

uint8_t GetDate()

{

uint8_t date, temp;

DS1307Read(0x04,&temp);

date=(((temp & 0b00110000)>>4)*10)+(temp & 0b00001111);

return date;

}

uint8_t GetMonth()

{

uint8_t month, temp;

DS1307Read(0x05,&temp);

month=(((temp & 0b00010000)>>4)*10)+(temp & 0b00001111);

return month;

}

uint8_t GetYear()

{

uint8_t year, temp;

DS1307Read(0x06,&temp);

year=(((temp & 0b11110000)>>4)*10)+(temp & 0b00001111);

return year;

}

bool SetSecond(uint8_t sec)

{

uint8_t temp,result;

temp=((sec/10)<<4)|(sec%10);

result=DS1307Write(0x00,temp);

return result;

}

bool SetMinute(uint8_t min)

{

uint8_t temp,result;

temp=((min/10)<<4)|(min%10);

result=DS1307Write(0x01,temp);

return result;

}

bool SetHour(uint8_t hr)

{

uint8_t temp,result,am_pm;

am_pm=GetAmPm();

temp=((hr/10)<<4)|(hr%10);

temp|=0b01000000; //12 Hr Mode

if(am_pm)

{

temp|=0b00100000;

}

result=DS1307Write(0x02,temp);

return result;

}

//0 is AM 1 is PM

bool SetAmPm(bool pm)

{

uint8_t temp,result;

DS1307Read(0x02,&temp);

if(pm)

temp|=0b00100000;//SET

else

temp&=0b11011111;//CLEAR

result=DS1307Write(0x02,temp);

return result;

}

bool SetDay(uint8_t day)

{

uint8_t temp,result;

temp=(day%10);

result=DS1307Write(0x03,temp);

return result;

}

bool SetDate(uint8_t date)

{

uint8_t temp,result;

temp=((date/10)<<4)|(date%10);

result=DS1307Write(0x04,temp);

return result;

}

bool SetMonth(uint8_t month)

{

uint8_t temp,result;

temp=((month/10)<<4)|(month%10);

result=DS1307Write(0x05,temp);

return result;

}

bool SetYear(uint8_t year)

{

uint8_t temp,result;

temp=((year/10)<<4)|(year%10);

result=DS1307Write(0x06,temp);

return result;

}

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

Gets the current time as a ascii/text string.

Example 12:49:22 PM (HH:MM:SS: PM)

Parameters

----------

Pointer to a string.

Return Value

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

0=failure

1=success

Example Usage

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

char time[12]; //The string must be at least 12bytes long

GetTimeString(time); //Now the string time contains the current time

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

bool GetTimeString(char *Time)

{

uint8_t data;

if(!DS1307Read(0x00,&data))

{

//I/O Error

return 0;

}

Time[11]='\0';

Time[10]='M';

Time[8]=' ';

Time[7]=48+(data & 0b00001111);

Time[6]=48+((data & 0b01110000)>>4);

Time[5]=':';

if(!DS1307Read(0x01,&data))

{

//I/O Error

return 0;

}

Time[4]=48+(data & 0b00001111);

Time[3]=48+((data & 0b01110000)>>4);

Time[2]=':';

if(!DS1307Read(0x02,&data))

{

//I/O Error

return 0;

}

Time[1]=48+(data & 0b00001111);

Time[0]=48+((data & 0b00010000)>>4);

//AM/PM

if(data & 0b00100000)

{

Time[9]='P';

}

else

{

Time[9]='A';

}

return 1;//Success

}

void DS1307Init(void)

{

SoftI2CInit();

}

bool DS1307Read(uint8_t address,uint8_t *data)

{

uint8_t res; //result

//Start

SoftI2CStart();

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

res=SoftI2CWriteByte(0xD0); //DS1307 address + W

//Error

if(!res) return false;

//Now send the address of required register

res=SoftI2CWriteByte(address);

//Error

if(!res) return false;

//Repeat Start

SoftI2CStart();

//SLA + R

res=SoftI2CWriteByte(DS1307_SLA_R); //DS1307 Address + R

//Error

if(!res) return false;

//Now read the value with NACK

*data=SoftI2CReadByte(0);

//Error

if(!res) return false;

//STOP

SoftI2CStop();

return true;

}

bool DS1307Write(uint8_t address,uint8_t data)

{

uint8_t res; //result

//Start

SoftI2CStart();

//SLA+W

res=SoftI2CWriteByte(DS1307_SLA_W); //DS1307 address + W

//Error

if(!res) return false;

//Now send the address of required register

res=SoftI2CWriteByte(address);

//Error

if(!res) return false;

//Now write the value

res=SoftI2CWriteByte(data);

//Error

if(!res) return false;

//STOP

SoftI2CStop();

return true;

}

void SoftI2CInit()

{

SDAPORT&=(1<<SDA);

SCLPORT&=(1<<SCL);

SDADDR&=(~(1<<SDA));

SCLDDR&=(~(1<<SCL));

}

void SoftI2CStart()

{

SCLDDR&=(~(1<<SCL));

_delay_loop_2(5);

SDADDR|=((1<<SDA));

_delay_loop_2(5);

}

void SoftI2CStop()

{

SDADDR|=((1<<SDA));

_delay_loop_2(5);

SCLDDR&=(~(1<<SCL));

_delay_loop_2(3);

SDADDR&=(~(1<<SDA));

_delay_loop_2(5);

}

uint8_t SoftI2CWriteByte(uint8_t data)

{

uint8_t i;

for(i=0;i<8;i++)

{

SCLDDR|=((1<<SCL));

_delay_loop_2(3);

if(data & 0x80)

SDADDR&=(~(1<<SDA));

else

SDADDR|=((1<<SDA));

_delay_loop_2(5);

SCLDDR&=(~(1<<SCL));

_delay_loop_2(5);

while((SCLPIN & (1<<SCL))==0);//pinA and PA0

data=data<<1;

}

//The 9th clock (ACK Phase)

SCLDDR|=((1<<SCL));

_delay_loop_2(3);

SDADDR&=(~(1<<SDA));

_delay_loop_2(5);

SCLDDR&=(~(1<<SCL));

_delay_loop_2(5);

uint8_t ack=!(SDAPIN & (1<<SDA));

//set ack == 0 if error

//means can't be congruent

SCLDDR|=((1<<SCL));

_delay_loop_2(5);

return ack;

}

uint8_t SoftI2CReadByte(uint8_t ack)

{

uint8_t data=0x00;

uint8_t i;

for(i=0;i<8;i++)

{

SCLDDR|=((1<<SCL));

_delay_loop_2(5);

SCLDDR&=(~(1<<SCL));

_delay_loop_2(5);

while((SCLPIN & (1<<SCL))==0);

if(SDAPIN &(1<<SDA))

data|=(0x80>>i);

}

SCLDDR|=((1<<SCL));

_delay_loop_2(3); //Soft_I2C_Put_Ack

if(ack)

{

SDADDR|=((1<<SDA));

}

else

{

SDADDR&=(~(1<<SDA));

}

_delay_loop_2(5);

SCLDDR&=(~(1<<SCL));

_delay_loop_2(5);

SCLDDR|=((1<<SCL));

_delay_loop_2(5);

return data;

}

#endif