最近学IIC，拿PCF8563做个钟！在OURAVR得到很多帮助，再次感谢！

哦！那就说说吧！放芯片那板是我用油性笔画的。    电路很简单。相信大家都懂！

#include<reg52.h>
#define uchar unsigned char
sbit sda=P1^7;
sbit scl=P1^6;
sbit w1=P2^0;
sbit w2=P2^1;
sbit w3=P2^2;
sbit w4=P2^3;
sbit w5=P2^4;
sbit w6=P2^5;
sbit w7=P2^6;
sbit w8=P2^7;

unsigned char leddata[]={

                0xC0,  //"0"
                0xF9,  //"1"
                0xA4,  //"2"
                0xB0,  //"3"
                0x99,  //"4"
                0x92,  //"5"
                0x82,  //"6"
                0xF8,  //"7"
                0x80,  //"8"
                0x90,  //"9"
                0x88,  //"A"
                0x83,  //"B"
                0xC6,  //"C"
                0xA1,  //"D"
                0x86,  //"E"
                0x8E,  //"F"
                0x89,  //"H"
                0xC7,  //"L"
                0xC8,  //"n"
                0xC1,  //"u"
                0x8C,  //"[s:9]"
                0xA3,  //"o"
                0xBF,  //"-"
                0xFF,  //熄灭
                0xFF  //自定义

                         };

uchar t, a,month,day,fen,shi,miao;
uchar mo1,mo2,f1,f2,d1,d2,s1,s2;
void disp(uchar mo1,uchar mo2,uchar day1,uchar day2,uchar shi1,uchar shi2,fen1,uchar fen2);
void delay1(uchar x);
void read_8563();
void delay()
{

   ; ;

}

void start()  //开始信号
{

    sda=1;
    delay1(1);
    //delay1(1);
    disp(mo1,mo2,d1,d2,s1,s2,f1,f2);
    scl=1;
    delay1(1);
    //delay1(1);
    disp(mo1,mo2,d1,d2,s1,s2,f1,f2);
    sda=0;
    delay();

}

void stop()   //停止
{
    sda=0;
    delay();
    scl=1;
    delay();
    sda=1;
    delay();
}

void respons()  //应答
{
    uchar i;
    scl=1;
    delay();
    while((sda==1)&&(i<250))i++;
    scl=0;
    delay();
}

void init()
{
    sda=1;
    delay();
    scl=1;
    delay();
}

void write_byte(uchar date)
{
    uchar i,temp;
    temp=date;

    for(i=0;i<8;i++)
    {
        temp=temp<<1;
        scl=0;
        delay();
        sda=CY;
        delay();
        scl=1;
        delay();
    //    scl=0;
     //   delay();
    }
    scl=0;
    delay();
    sda=1;
    delay();
}

uchar read_byte()
{
    uchar i,k;
    scl=0;
    delay();
    sda=1;
    delay();
    for(i=0;i<8;i++)
    {
        scl=1;
        delay();
        k=(k<<1)|sda;
        scl=0;
        delay();
    }
    return k;
}

void delay1(unsigned int x)
{
    uchar a,b;
    for(a=x;a>0;a--)
     for(b=100;b>0;b--);
}

void write_add(uchar address,uchar date)
{
    start();
    write_byte(0xa2);
    respons();

    write_byte(address);
    respons();
    write_byte(date);
    respons();
    stop();
}

uchar read_add(uchar address)
{
    uchar date;
    start();
    write_byte(0xa2);
    respons();
    write_byte(address);
    respons();
    start();
    write_byte(0xa3);
    respons();
    date=read_byte();
    stop();
    return date;
}

void uart()
{
     TMOD=0x21;//设置定时器1为工作方式2，8位自动重装，设定时器0为16位定时器。    d=0;
    TH1=0xfd;
    TL1=0xfd;
    TR0=1;
    ET0=1;
    TH0=0x4c;
    TL0=0x00;



    TR1=1;//启动定时器1
    REN=1;// 允许串行接收。

    SM1=1; //方式1，8位UART
    EA=1; //开总中断
    ES=1; //开串行中断

}
void main()
{
    init();
    uart();
    write_add(0x07,0x06);    //月
    delay1(100);
    delay1(100);

    write_add(0x05,0x29); // 日
    delay1(100);
    delay1(100);


       write_add(0x04,0x23); //时
    delay1(100);
    delay1(100);

    write_add(0x03,0x29);  //分
    delay1(100);
    delay1(100);

     P2=0xff;


    while(1)
    {

          mo1=month/10;
           mo2=month%10;
           d1=day/10;
           d2=day%10;
           s1=shi/10;
           s2=shi%10;
           f1=fen/10;
           f2=fen%10;

           disp(mo1,mo2,d1,d2,s1,s2,f1,f2);

          if(t==20)
          {
              t=0;
            read_8563();
            ES=0;
            SBUF=miao;
            while(!TI);
            TI=0;
            ES=1;


            }
     }

}

void disp(uchar mo1,uchar mo2,uchar day1,uchar day2,uchar shi1,uchar shi2,fen1,uchar fen2)
{
w1=0;
P0=leddata[mo1];
delay1(10);
w1=1;
P0=0xff;

w2=0;
P0=leddata[mo2];
delay1(10);
w2=1;
P0=0xff;

w3=0;
P0=leddata[day1];
delay1(10);
w3=1;
P0=0xff;

w4=0;
P0=leddata[day2];
delay1(10);
w4=1;
P0=0xff;

w5=0;
P0=leddata[shi1];
delay1(10);
w5=1;
P0=0xff;

w6=0;
P0=leddata[shi2];
delay1(10);
w6=1;
P0=0xff;

w7=0;
P0=leddata[fen1];
delay1(10);
w7=1;
P0=0xff;

w8=0;
P0=leddata[fen2];
delay1(10);
w8=1;
P0=0xff;

}

void read_8563()
   {
       miao=read_add(0x02)&0x7f;//获取秒数据
      /* miao=((miao&0xf0)>>4&0x0f)*10+(miao&0x0f);//BCD码转换成10进制数
   if(miao>=60){miao=0;} */





   fen=read_add(0x03)&0x7f;//获取分钟
   fen=((fen&0xf0)>>4&0x0f)*10+(fen&0x0f);//BCD码转换成10进制数
   if(fen>=60){fen=0;}


   shi=read_add(0x04)&0x3f;//获取小时
   shi=((shi&0xf0)>>4&0x0f)*10+(shi&0x0f);//BCD码转换成10进制数
   if(shi>=24){shi=0;}


   day=read_add(0x05)&0x3f;//获取日数据
        day=(( day&0xf0)>>4&0x0f)*10+( day&0x0f);//BCD码转换成10进制数
   if( day>=31){ day=0;}


  /* week=read_add(0x06)&0x07;//获取星期
   if(week>6){week=0;} */

   month=read_add(0x07)&0x1f;//获取月
   month=((month&0xf0)>>4&0x0f)*10+(month&0x0f);//BCD码转换成10进制数
   if(month>=24){month=0;}

  /* year=read_add(0x08)&0xff;//获取年
   year=((year&0xf0)>>4&0x0f)*10+(year&0x0f);//BCD码转换成10进制数
   delay1(100); */
   }

void time()    interrupt 1
{
    TH0=0x4c;
    TL0=0x00;
    t++;

}
   void ser() interrupt 4
{
    RI=0;
    P0=SBUF;

}