主程序：
# include "reg52.h"
# include "DS13.h"
typedef unsigned char u8;
typedef unsigned int u16;
sbit LSA=P2^2;
sbit LSB=P2^3;
sbit LSC=P2^4;
u8 DisplayData[8];
u8 code smgduan [10]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
void delay (u16 i)
{
while (i--);
}
void datapros ()
{ DS1302ReadTime();
DisplayData[0]=smgduan[TIME[2]/16]; //? ??λ 16???????****1111???????λ?????
DisplayData[1]=smgduan[TIME[2]&0x0f]; //??λ
DisplayData[2]=0x40; //????
DisplayData[3]=smgduan[TIME[1]/16]; //?? ??λ
DisplayData[4]=smgduan[TIME[1]&0x0f]; //??λ
DisplayData[5]=0x40;
DisplayData[6]=smgduan[TIME[0]/16]; //?? //??λ
DisplayData[7]=smgduan[TIME[0]&0x0f]; //??λ
}
void DigDisplay ()
{
u8 i;
for (i=0;i<8;i++)
{
switch(i)
{
case (0): //???i????0???????????
LSA=0;LSB=0;LSC=0;break; //break????????case (0)?????switch
case (1):
LSA=1;LSB=0;LSC=0;break;
case (2):
LSA=0;LSB=1;LSC=0;break;
case (3):
LSA=1;LSB=1;LSC=0;break;
case (4):
LSA=0;LSB=0;LSC=1;break;
case (5):
LSA=1;LSB=0;LSC=1;break;
case (6):
LSA=0;LSB=1;LSC=1;break;
case (7):
LSA=1;LSB=1;LSC=1;break;
}
P0=DisplayData[ i];
delay (100);
P0=0x00; //??????????????
}
}
void main ()
{
DS1302Tnit ();
while (1)
{
datapros ();
DigDisplay ();
}
}
DS13.c：
# include "DS13.h"
uchar code READ_RTC_ADDR [7]={0X81,0x83,0x85,0x87,0x89,0x8b,0x8d}; //?????
uchar code WRITE_RTC_ADDR [7]={0X80,0x82,0x84,0x86,0x88,0x8a,0x8c}; //д???
uchar TIME[7]={0,0,0x05,0x14,0x05,0x04,0x20}; //?????????? ?洢????BCD?????滹?????
void DS1302Write (uchar addr,uchar dat) //?????????????????????????? //??λ????????
{
uchar n;
RST=0;
_nop_();
SCLK=0;//???SCLK?????
_nop_();
RST=1;//???RST(CE)?????
_nop_();
for (n=0;n<8;n++) //???????8λ???????
{
DSIO=addr&0x01; //??????λ???????
addr>>=1;
SCLK=1; //???????????????DS1302?????
_nop_();
SCLK=0; //??????8??
_nop_();
}
for (n=0;n<8;n++) //д??8λ????
{
DSIO=addr&0x01; //??????λ???????
dat>>=1;
SCLK=1; //???????????????DS1302???????
_nop_();
SCLK=0;
_nop_();
}
RST=0;//???????????
_nop_();
}
uchar DS1302Read (uchar addr) //??λ??????? //uchar ?????з????
{
uchar n,dat,dat1;
RST=0;
_nop_();
SCLK=0;//???SCLK?????
_nop_();
RST=1;//???RST(CE)?????
_nop_();
for (n=0;n<8;n++) //???????8λ???????
{
DSIO=addr&0x01; //??????λ???????
addr>>=1;
SCLK=1; //???????????????DS1302???????
_nop_();
SCLK=0;
_nop_();
}
_nop_();
for (n=0;n<8;n++) //д??8λ????
{
dat1=DSIO; //??????λ???????
dat=(dat>>1)|(dat1<<7);
SCLK=1; //???????????????DS1302???????
_nop_();
SCLK=0; //DS1302????????????????
_nop_();
}
RST=0;
_nop_(); //?????DS1302??λ????????????? ?????????
SCLK=1;
_nop_();
DSIO=0;
_nop_();
DSIO=1;
_nop_();
return dat;
}
void DS1302Tnit () //?????
{
uchar n;
DS1302Write(0x8e,0x00); //???д????????????д????????
for (n=0;n<7;n++) //д?????????????????????????????
{
DS1302Write (WRITE_RTC_ADDR[n],TIME[n]); //??? ????
}
DS1302Write (0x8e,0x80); //??д????????
}
void DS1302ReadTime ()
{
uchar n;
for (n=0;n<7;n++) //???7??????????????????????????
{
TIME[n]=DS1302Read(READ_RTC_ADDR[n]);
}
}
DS13.h
# ifndef _DS13_H_
# define _DS13_H_
# include <reg52.h>
# include <intrins.h>
# ifndef uchar
# define uchar unsigned char
# endif
# ifndef uint //????ж???uint
# define uint unsigned int //???????uint?unsigned int????
# endif
sbit DSIO=P3^4; //IO
sbit RST=P3^5; //CE
sbit SCLK=P3^6; //SCLK
void DS1302Write (uchar addr,uchar dat);
uchar DS1302Read (uchar dat);
void DS1302Tnit ();
void DS1302ReadTime ();
extern uchar TIME[7];//??????????
# endif
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