i2crtc.h

/*
 * I2CRTC.h - library for common I2C RTCs
 * This library is intended to be uses with Arduino Time.h library functions
 */


#ifndef I2CRTC_h
#define I2CRTC_h

#define DS1307_ADDR  0x68
#define MCP7940_ADDR 0x6F
#define PCF8563_ADDR 0x51

#include "TimeLib.h"

// library interface description
class I2CRTC
{
  // user-accessible "public" interface
  public:
  I2CRTC();
  static time_t get();
	static void set(time_t t);
	static void read(tmElements_t &tm);
	static void write(tmElements_t &tm);
  static bool detect();
  
  private:
	static uint8_t dec2bcd(uint8_t num);
  static uint8_t bcd2dec(uint8_t num);
  static uint8_t addr;
};

extern I2CRTC RTC;

#endif