<code class="language-c">#include<reg52.h>
#define uint unsigned int
#define	uchar unsigned char
uchar code table[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71};
uint tent,sec;
bit write=0;
sbit sda=P1^2;
sbit scl=P1^7;
sbit dula=P2^6;
sbit wela=P2^7;
void delay()
{;;}
void delay1ms(uint z)
{
uint x,y;
for(x=0;x<z;x++) for(y="0;y<110;y++);" } void start() { sda="1;" delay(); scl="1;" stop() response() uint i; while((sda="=1)&&(i<250))" i++; init() write_byte(uchar date) uchar temp,i; temp="date;" for(i="0;i<8;i++)" read_byte() k,i; k="(k<<1)|sda;" dealy(); return k; write_24c02(uchar adress,uchar start(); write_byte(0xa0); response(); write_byte(adress); write_byte(date); stop(); read_add(uchar adress) date; write_byte(0xa1); date="read_byte();" display(uchar shi,uchar ge) dula="1;" p0="table[shi];" wela="1;" delay1ms(5); main() init(); sec="read_add(2);" if(sec>100)
 sec=0;
 TMOD=0x01;
 TH0=(65535-50000)/256;
 TL0=(65535-50000)%256;
 EA=1;
 ET0=1;
 TR0=1;
 while(1)
 {
 display(sec/10,sec%10);
 if(write==1)
 {
  write=0;
  write_24c02(2,sec);
 }
 }
}
void qwe()interrupt 1
{
 TH0=(65535-50000)/256;
 TL0=(65535-50000)%256;
 tent++;
 if(tent=20)
 {
 tent=0;
 sec++;
 write=1;
 if(sec==100)
 sec=0;
 }
}
</z;x++)></reg52.h></code>