/**********************************************
* File: DS1307.H
* Defines the basic function required to interact with the DS1307
* using the i2c.h header
***********************************************/

#ifndef _DS1307_H
#define _DS1307_H



#include "i2c.h" /* Need i2c bus */
#define DS1307_ID 0xD0
#define SEC   0x00
#define MIN   0x01
#define HOUR  0x02
#define DATE  0x04
#define MONTH 0x05
#define YEAR  0x06

unsigned char DS1307_get(unsigned char addr)
{
	unsigned char ret;
	I2C_start();            /* Start i2c bus */
	I2C_write(DS1307_ID);   /* Connect to DS1307 */
	I2C_write(addr); /* Request RAM address on DS1307 */
	I2C_start(); /* Start i2c bus */
	I2C_write(DS1307_ID+1); /* Connect to DS1307 for Read */
	ret = I2C_read(); /* Receive data */
	I2C_stop(); /* Stop i2c bus */
	return ret;
}

void DS1307_settime(unsigned char hh, unsigned char mm, unsigned char ss)
{
	I2C_start();
	I2C_write(DS1307_ID); /* connect to DS1307 */
	I2C_write(0x00); /* Request RAM address at 00H */
	I2C_write(ss); /* Write sec on RAM address 00H */
	I2C_write(mm); /* Write min on RAM address 01H */
	I2C_write(hh); /* Write hour on RAM address 02H */
	I2C_stop();           /* Stop i2c bus */
}

void DS1307_setdate(unsigned char dd, unsigned char mm, unsigned char yy)
{
	I2C_start();
	I2C_write(DS1307_ID); /* connect to DS1307 */
	I2C_write(0x04); /* Request RAM address at 04H */
	I2C_write(dd); /* Write date on RAM address 04H */
	I2C_write(mm); /* Write month on RAM address 05H */
	I2C_write(yy); /* Write year on RAM address 06H */
	I2C_stop(); /* Stop i2c bus */
}

void DS1307_startTimer()
{
	I2C_start();
	I2C_write(DS1307_ID); /* connect to DS1307 */
	I2C_write(0x00); /* Request RAM address at 00H */
	I2C_write(0x80); /* Set CH bit ie. 7th bit og 0x00 to start timer*/
	I2C_stop();           /* Stop i2c bus */
}

#endif