DS1302

.H文件

#ifndef __DS1302_H
#define __DS1302_H

#include "STC15F2K60S2.h"
#include <intrins.h>

extern unsigned char timeStart[7];
extern unsigned char timeTemp[7];

void Write_Ds1302_Byte(unsigned  char temp);
void Write_Ds1302( unsigned char address,unsigned char dat );
unsigned char Read_Ds1302 ( unsigned char address );
void write_time();
void read_time();

#endif

.C文件

#include <ds1302.h>

sbit SCK=P1^7;		
sbit SDA=P2^3;		
sbit RST = P1^3;   // DS1302复位

unsigned char timeStart[7]={55, 55, 23, 31, 12, 7, 2018};
unsigned char timeTemp[7]={00, 00, 00, 00, 00, 00, 00};



void Write_Ds1302_Byte(unsigned  char temp) 
{
	unsigned char i;
	for (i=0;i<8;i++)     	
	{ 
		SCK=0;
		SDA=temp&0x01;
		temp>>=1; 
		SCK=1;
	}
}   

void Write_Ds1302( unsigned char address,unsigned char dat )     
{
	unsigned char temp;
 	RST=0;
	_nop_();
 	SCK=0;
	_nop_();
 	RST=1;	
   	_nop_();  
	temp=(dat/10<<4)|(dat%10);            //数值转换
	
 	Write_Ds1302_Byte(address);	
 	Write_Ds1302_Byte(temp);		
 	RST=0; 
}

unsigned char Read_Ds1302 ( unsigned char address )
{
 	unsigned char i,t,temp=0x00;
 	RST=0;
	_nop_();
 	SCK=0;
	_nop_();
 	RST=1;
	_nop_();
 	Write_Ds1302_Byte(address);
 	for (i=0;i<8;i++) 	
 	{		
		SCK=0;
		temp>>=1;	
 		if(SDA)
 		temp|=0x80;	
 		SCK=1;
	} 
 	RST=0;
	_nop_();
 	RST=0;
	SCK=0;
	_nop_();
	SCK=1;
	_nop_();
	SDA=0;
	_nop_();
	SDA=1;
	_nop_();
	
	t=temp/16*10+temp%16;              //十六进制的数转换成十进制
	
	return t;			
}

void write_time()
{
	unsigned char i, addr=0x80;
	Write_Ds1302(0x8e,0x00);
	for(i=0; i<7; i++)
	{
		Write_Ds1302(addr, timeStart[i]);
		addr+=2;
	}
	Write_Ds1302(0x8e,0x80);
}

void read_time()
{
	unsigned char i, addr=0x81;
	Write_Ds1302(0x8e,0x00);
	for(i=0; i<7; i++)
	{
		timeTemp[i]=Read_Ds1302(addr);
		addr+=2;
	}
	Write_Ds1302(0x8e,0x80);
}