#include<reg52.h>

#define uchar unsigned char

#define uint unsigned int

sbit sda=P2^0;

sbit scl=P2^1;

sbit dula=P2^6;

sbit wela=P2^7;

uchar flag,sec;

uint num;

uchar code table[]={

0x3f,0x06,0x5b,0x4f,

0x66,0x6d,0x7d,0x07,

0x7f,0x6f,//0x77,0x7c,

//0x39,0x5e,0x79,0x71

};

void delay()

{ ;; }

void start() //開始訊號

{

sda=1;

delay();

scl=1;

delay();

sda=0;

delay();

}

void stop() //停止

{

sda=0;

delay();

scl=1;

delay();

sda=1;

delay();

}

void respons() //應答

{

uchar i=0;

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;

scl=0;

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

{

temp=temp<<1;

delay();

sda=CY;

delay();

scl=1;

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 delayms(uchar x)

{

uchar a,b;

for(a=x;a>0;a--)

for(b=110;b>0;b