//CPU：STC89C52RC 晶震：11.0592M

#include 〈reg52.h>

#include

#include

#define uchar unsigned char

#define uint unsigned int

uchar TAB_T[]={ 0x31,0x06,0x10,//秒,分,时

0x13,0x01,0x07,0x08};//日,星期,月,年.

sbit SDA=P2^6; //数据

sbit SCL=P2^7; //时钟

void Delay5us(void)

{

_nop_();

_nop_();

_nop_();

_nop_();

_nop_();

}

void Start(void)

{

SDA=1;

SCL=1;

Delay5us();

SDA=0;

Delay5us();

}

void Stop(void)

{

SDA=0;

SCL=1;

Delay5us();

SDA=1;

Delay5us();

}

void Reack(void)

{

uchar i=0;

SCL=1; //准备检测SDA Delay5us();

while((SDA==1)&&(i<100))i++;//SDA=0为应该信号,SDA=1为非应答

SCL=0; //准备下一变化数据

}

void WriteByte(uchar ucByte)

{

uchar i;

SCL=0;

for(i=0;i<8;i++)

{

SDA=(bit)(ucByte&0x80);//先写入高位

SCL=1;

Delay5us();

SCL=0;

ucByte<<=1;

}

SDA=1; //释放数据线

}

uchar ReadByte(void)

{

uchar i,ucByte;

SCL=0;

for(i=0;i<8;i++)

{

ucByte<<=1;

if(SDA)

ucByte++;

SCL=1;

Delay5us();

SCL=0;

}

return ucByte;

}

void Write8563(uchar ucAddr,uchar ucData)

{

Start();

WriteByte(0xa2);

Reack();

WriteByte(ucAddr);

Reack();

WriteByte(ucData);

Reack();

Stop();

}

uchar Read8563(uchar ucAddr)

{

uchar ucData;

Start();

WriteByte(0xa2); //写器件地址

Reack();

WriteByte(ucAddr); //写字节地址

Reack();

Start();

WriteByte(0xa3); //写器件地址,最低为1表示读

Reack();

ucData=ReadByte(); //写字节地址

Stop();

return ucData; //读数据

}

void Init8563(void)

{

uchar i,ucAddr=0x02;

Write8563(0x00,0x00);

Write8563(0x01,0x11);

for(i=0;i<7;i++)

{

Write8563(ucAddr,TAB_T[i]);

ucAddr++;

}

}

void GetTime(void)

{

uchar i,ucData1,ucData2,ucAddr=0x02;

uchar *pTime=TAB_T;

for(i=0;i<7;i++)

{

pTime[i]=Read8563(ucAddr);

ucAddr++;

}

pTime[0]&=0x7f; //屏蔽无效位

pTime[1]&=0x7f;

pTime[2]&=0x3f;

pTime[3]&=0x3f;

pTime[4]&=0x07;

pTime[5]&=0x1f;

for(i=0;i<7;i++)

{

ucData1=pTime[i]/16; //BCD码转十六进制

ucData2=pTime[i]%16;

pTime[i]=ucData1*10+ucData2;

}

}