Arduino通信 DS1307 RTC I2C模块原理图及程序分享 -

/*
DS1307.h - library for DS1307 rtc
*/
// ensure this library description is only included once
#ifndef DS1307_h
#define DS1307_h
// include types & constants of Wiring core API
#include <WConstants.h>
// include types & constants of Wire ic2 lib
#include <../Wire/Wire.h>
#define DS1307_SEC 0
#define DS1307_MIN 1
#define DS1307_HR 2
#define DS1307_DOW 3
#define DS1307_DATE 4
#define DS1307_MTH 5
#define DS1307_YR 6
#define DS1307_BASE_YR 2000
#define DS1307_SQW1HZ 7
#define DS1307_SQW4KHZ 8
#define DS1307_SQW8KHZ 9
#define DS1307_SQW32KHZ 10
#define DS1307_CTRL_ID B1101000 //DS1307
// Define register bit masks
#define DS1307_CLOCKHALT B10000000
#define DS1307_LO_BCD B00001111
#define DS1307_HI_BCD B11110000
#define DS1307_HI_SEC B01110000
#define DS1307_HI_MIN B01110000
#define DS1307_HI_HR B00110000
#define DS1307_LO_DOW B00000111
#define DS1307_HI_DATE B00110000
#define DS1307_HI_MTH B00110000
#define DS1307_HI_YR B11110000
// Prescaler
#define DS1307_LOW_BIT B00000000
#define DS1307_HIGH_BIT B10000000
#define DS1307_SQW1HZ_BIT B00010000
#define DS1307_SQW4KHZ_BIT B00010001
#define DS1307_SQW8KHZ_BIT B00010010
#define DS1307_SQW32KHZ_BIT B00010011
// library interface description
class DS1307
{
// user-accessible "public" interface
public:
DS1307();
void get(int *, boolean);
int get(int, boolean);
void set(int, int);
void start(void);
void stop(void);
void SetOutput(int c);
int GetOutput(void);
// library-accessible "private" interface
private:
byte rtc_bcd[7]; // used prior to read/set ds1307 registers;
void read(void);
void save(void);
};
extern DS1307 RTC;
#endif

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