twi.h

DS1307的仿真实例

#ifndef TWI_H

	#define TWI_H

	#include "comm.h"
	#define FREQ 4
	#define DS1307_ADDR 0XD0
	#define TW_ACK  1
	#define TW_NACK 0
	#define RTC_READ 1
	#define RTC_WRITE 0


	uchar g_aTimeBuf[7];//日历/时钟BCD格式缓冲区
	uchar g_aTimeBin[7];//时钟/日历二进制格式缓冲区

	void DelayMs(uint ms);
	
	//初始化TWI功能
	void RtcInit(void);

	void twi_stop(void);
	uchar twi_start(void);

	//写一字节
	uchar twi_writebyte(uchar c);

	//读一字节 ack: true时发ACK，false时发NACK
	uchar twi_readbyte(uchar *c ,uchar ack);


#endif