ʱ?ӵ?·????

前段时间用pcf8563芯片做了个电子时钟，这个芯片自动走时间，我只用去读和写就行了，pcf8563要加一个后备电池，这样就不怕单片机掉电了。这个不太符合你的要求，不过这是我现成的，我可不想在这里重新写代码。代码不是很规范，但是能正常运行。

你在Keil里建个工程，下面一段是display.c的代码：

#include?"at89x51.h"

#include?"PCF8563.h"

//#include?"TG12232.h"

#define?Key_Set?P2_2

#define?Key_Add?P2_1

#define?Key_Sub?P2_0

//#define?LCD_CS?P2_5

//#define?LCD_DATA?P2_6

//#define?LCD_CLK?P2_7

void?Key_down();

void?Displaybuffer(char?Location);

//void?LCD_Display();

unsigned?char?LedTable[10]={0x3f,0x03,0x6d,0x67,0x53,0x76,0x7e,0x23,0x7f,0x77};

bit?state=0;

char?set=0;

void?main()

{

unsigned?char?i,j,n=2;

P1=0;

TMOD=0x01;

TH0=0x4c;

TL0=0x00;

ET0=1;

EA=1;

//?P8563_init();

P2=0xff;

P3=0x02;

P1=LedTable[8];

//?while(n--)

for(i=0;i<250;i++)

for(j=0;j<6;j++)

{

delay(10);;

P3<<=1;

if(P3==0x80)

P3=0x02;

delay(10);

}

delay(5000);

//?lcd_init();

//?set_lcd_position(0,1); //汉字定位到上行左端

//?lcd_display(0,0,"Welcome?to?use!");

//?lcd_display(1,0,"? Leo.Zheng? ");

//?delay(1000);

//?lcd_send_com(0x01);//清除

//?lcd_display(0,0,"20? /? /");

while(1)

{

Key_down();

Displaybuffer(set);

//?LCD_Display();

}

}

void?Time0_H()?interrupt?1

{

static?unsigned?char?i=0;?

TH0=0x4c;

TL0=0x00;

i++;

if(i==8)

{?

i=0;

state=~state;

}

}?

void?Key_down()

{

//?static?char?set=0;

unsigned?char?buffer;

if(!Key_Set)

for(buffer=0;buffer<250;buffer++)

_nop_();

if(!Key_Set)

{

if(set==0)

{

writeData(0x0,0x20);//使时间停止?

TR0=1;

}

set++;

if(set==4)

{

set=0;

TR0=0;

writeData(0x0,0x00);

}

while(!Key_Set)

Displaybuffer(set);

}

if(!Key_Add)

for(buffer=0;buffer<250;buffer++)

_nop_();

if(!Key_Add)

{

if(set==0)

return;

P8563_gettime();

buffer=?g8563_Store[set-1];

buffer=((buffer&0xf0)>>4)*10+(buffer&0x0f);

if(buffer>=59)

buffer=0;

else?if(buffer>=23?&&?set==3)

buffer=0;

else

buffer++;

buffer=(buffer/10<<4)+(buffer%10);

writeData(set+1,buffer);

while(!Key_Add)

Displaybuffer(set);

}

if(!Key_Sub)

for(buffer=0;buffer<250;buffer++)

_nop_();

if(!Key_Sub)

{

if(set==0)

return;

P8563_gettime();

buffer=?g8563_Store[set-1];

buffer=((buffer&0xf0)>>4)*10+(buffer&0x0f);

if(buffer?==?0)

{

if(set==3)

buffer=23;

else

buffer=59;

}

else

buffer--;?

buffer=(buffer/10<<4)+(buffer%10);

writeData(set+1,buffer);

while(!Key_Sub)

Displaybuffer(set);

}

}?

void?Displaybuffer(char?Location)

{

unsigned?char?i;

P8563_gettime();

if(Location==1?&&?state==0)

{?

P1=0;

P3=0;

goto?sec_bit1;

}?

P3=0x02;?

P1=LedTable[g8563_Store[0]&0x0f];?//sec

sec_bit1:

for(i=0;i<250;i++);

P1=0;?

if(Location==1?&&?state==0)

{

P1=0;

P3=0;

goto?sec_bit2;

}?

P3=0x04;

P1=LedTable[(g8563_Store[0]&0xf0)>>4];

sec_bit2:

for(i=0;i<250;i++);?

P1=0;

if(Location==2?&&?state==0)

{?

P1=0;

P3=0;

goto?min_bit1;

}?

P3=0x08;

P1=LedTable[g8563_Store[1]&0x0f];? //min

min_bit1:

for(i=0;i<250;i++);?

P1=0;

if(Location==2?&&?state==0)

{?

P1=0;

P3=0;

goto?min_bit2;

}

P3=0x10;?

P1=LedTable[(g8563_Store[1]&0xf0)>>4];

min_bit2:

for(i=0;i<250;i++);?

P1=0;

if(Location==3?&&?state==0)

{?

P1=0;

P3=0;

goto?hour_bit1;

}?

P3=0x20;

P1=LedTable[g8563_Store[2]&0x0f]; //hour

hour_bit1:

for(i=0;i<250;i++);?

P1=0;

if(Location==3?&&?state==0)

{?

P1=0;

P3=0;

goto?hour_bit2;

}?

P3=0x40;

P1=LedTable[(g8563_Store[2]&0xf0)>>4];

hour_bit2:

for(i=0;i<250;i++);

P1=0;

P3=0x02;?

}

这下面一段是pcf8563.h的代码：

#ifndef?__PFC8563_H__

#define?__PFC8563_H__

#include?<intrins.h>

#define?uchar?unsigned?char

sbit?SDA=P2^4;

sbit?SCL=P2^3;

//extern?void ? _nop_ ?(void);

//extern?void?delay(unsigned?int?ms);

uchar?g8563_Store[7];?

uchar?code?c8563_Store[7]={0x01,0x02,0x07,0x09,0x04,0x02,0x12};?

void?delay(long?time)

{while(time--);

}

void?DD()

{

//delay(1);

//?uchar?i;

// for(i=0;i<250;i++)

_nop_();

_nop_();?

}

void?Start()

{? EA=0;

SDA=1;

SCL=1;

DD();

SDA=0;

DD();

SCL=0;

}

void?Stop()

{

SDA=0;

SCL=0;

DD();

SCL=1;

DD();

SDA=1;

DD();

EA=1;

}

void?WriteACK(uchar?ack)

{

SDA=ack;

DD();

SCL=1;

DD();

SCL=0;

}

void?WaitACK()

{? uchar?errtime=20;

SDA=1;

DD();?

SCL=1;

DD();

while(SDA)

{? errtime--;

? if(!errtime)?

? {

Stop();

SDA=0;? //自己加的******

? }

}

SDA=1;?//自己加的******

SCL=0;

DD();

}

void?writebyte(uchar?wdata)

{

uchar?i;

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

{

if(wdata&0x80)?SDA=1;

else?SDA=0;

wdata<<=1;

SCL=1;

DD();

SCL=0;

}

WaitACK(); ?//I2C器件或通讯出错，将会退出I2C通讯

}

uchar?Readbyte()

{

uchar?i,bytedata;

SDA=1;

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

{

? SCL=1;?

? bytedata<<=1;

? bytedata|=SDA;

? SCL=0;

? DD();

}

return(bytedata);

}

void?writeData(uchar?address,uchar?mdata)

{

Start();

writebyte(0xa2);?

writebyte(address);?

writebyte(mdata);?

Stop();

}

uchar?ReadData(uchar?address)?

{? uchar?rdata;

Start();

writebyte(0xa2);?

writebyte(address);?

Start();

writebyte(0xa3);?

rdata=Readbyte();

WriteACK(1);

Stop();

return(rdata);

}

void?ReadData1(uchar?address,uchar?count,uchar?*?buff)?

{? uchar?i;

Start();

writebyte(0xa2);?

writebyte(address);?

Start();

writebyte(0xa3);?

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

{

buff[i]=Readbyte();

if(i<count-1)?WriteACK(0);

}

WriteACK(1);

Stop();

}

void?P8563_Read()

{ uchar?time[7];

ReadData1(0x02,0x07,time);

g8563_Store[0]=time[0]&0x7f;?

g8563_Store[1]=time[1]&0x7f;?

g8563_Store[2]=time[2]&0x3f;?

g8563_Store[3]=time[4]&0x07;?

g8563_Store[4]=time[3]&0x3f;?

g8563_Store[5]=time[5]&0x1f;?

g8563_Store[6]=time[6];?

}

void?P8563_gettime()

{

P8563_Read();

if(g8563_Store[0]==0)

? P8563_Read();?

}

//void?P8563_settime()

//{

// ?uchar?i;

// ?for(i=2;i<=8;i++)?{?writeData(i,g8563_Store[i-2]);?}

// ?writeData(6,g8563_Store[3]);

//}

#endif