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[selva]

check out this –

#include



//Define PIC Registers #include



__CONFIG(0x3f72);



//Select HS oscillator, Enable (PWRTE,BOREN),



//Disable (CPD,CP,WDTEN,In-circuit Debugger)



#define LC01CTRLIN 0xd0



#define LC01CTRLOUT 0xd1



#define I2C_FREG 100



#define FOSC 10000



#define BAUD_RATE 9.6



// 9600 Baud rate #define BAUD_VAL (char)(FOSC/ (16 * BAUD_RATE )) - 1;



//Calculation For 9600 Baudrate @10Mhz unsigned char sec,min,hour,day,date,month,year; unsigned char data[7]={0x45,0x59,0x71,0x04,0x05,0x10,0x06};



int i;



void DS1307Write(unsigned char,unsigned char);



void WaitMSSP();



unsigned char DS1307Read(unsigned char);



void i2c_init(void);



void ds1307_init(void);



void serial_init(void);



void DelayMs(unsigned int);



void main()



{



int count=0;



DelayMs(20);



ds1307_init();



serial_init();



for(i=0;i<7;i++) DS1307Write(i,data);



printf("33[2J");



DelayMs(20);



while(1)



{



sec=DS1307Read(0);



// Read second min=DS1307Read(1);



// Read minute hour=DS1307Read(2);



// Read hour day=DS1307Read(3);



// Read day date=DS1307Read(4);



// Read date month=DS1307Read(5);



// Read month year=DS1307Read(6);



// Read year printf("Time: %x : %x : %x ",(hour&0x1f),min,sec);



//Display the Hours, Minutes, Seconds(hours is taken from 5 LSB bits printf("Date: %x / %x / %x r",date,month,year);



//Display the Date, Month, Year DelayMs(150);



}



}



void DS1307Write(unsigned char addr, unsigned char data)



{



SEN=1;



//Initiate Start condition on SDA & SCL pins WaitMSSP();



SSPBUF=LC01CTRLIN;



// Slave address + Write command WaitMSSP();



SSPBUF=addr;



// Write the location WaitMSSP();



SSPBUF=data;



// Write the Data WaitMSSP();



PEN=1;



// Enable the Stop bit WaitMSSP();



}



unsigned char DS1307Read(unsigned char addr)



{



unsigned char x;



RSEN=1;



// Enable the repeated Start Condition WaitMSSP ();



SSPBUF=LC01CTRLIN;



// Slave address + Write command WaitMSSP ();



SSPBUF=addr;



//Write the location (memory address of Hour, minute, etc... WaitMSSP ();



RSEN=1;



// Enable the repeated Start Condition WaitMSSP ();



SSPBUF=LC01CTRLOUT;



// Slave address + Read command WaitMSSP ();



RCEN=1;



// Enable to receive data WaitMSSP ();



ACKDT=1;



// Acknowledge the operation (Send NACK) ACKEN=1;



// Acknowledge sequence on SDA & SCL pins PEN=1;



// Enable the Stop bit WaitMSSP ();



x=SSPBUF;



// Store the Receive value in a variable return (x);



}



void WaitMSSP()



{



while(!SSPIF);



// SSPIF is zero while TXion is progress SSPIF=0;



}



void ds1307_init()



{



TRISC3=1;



// RC3,RC4 set to I2C Mode(Input) TRISC4=1;



SSPCON=0x28;



// Enable the SDA,SCL & I2C Master Mode SSPADD=(FOSC / (4 * I2C_FREG)) - 1;



// SSP baud rate 100Khz SSPSTAT=0x80;



// Disable slew Rate control PORTC=0x18;



DS1307Write(0,0x00);



}



void serial_init()



{ TRISC6=1;



// RC7, RC6 set to USART Mode TRISC7=1;



TXSTA=0x24;



// Enable Transmission, Asynchronous mode, High Speed mode SPBRG=BAUD_VAL;



// 9600 Baud rate selection RCSTA=0x90;



// Enable Serial Port & Continuous Reception TXIF=1;



// Enable Transmission



}



void putch(unsigned char byte)



//Required for printf statement



{



while(!TXIF);



// Wait for the Transmit Buffer to be empty TXREG = byte;



// Transmit the Data



}



void DelayMs(unsigned int Ms)



{



int delay_cnst;



while(Ms>0)



{



Ms--;



for(delay_cnst = 0;delay_cnst <220;delay_cnst++);



}



}