#include
//#include
//#include
#include
#define uchar unsigned char
#define uint unsigned int
sbit  led=P1^0;
sbit  led2=P1^1;
sbit SCL=P3^5;  //24c02 SCL
sbit SDA=P3^4;  //24c02 SDA
//sbit DOG=P1^7;  //狗
uchar x24c02_read(uchar address);             //从24c02的地址address中读取一个字节数据
void x24c02_write(uchar address,uchar info);  //向24c02的address地址中写入一字节数据info
void x24c02_init();                           //24c02初始化子程序
void delay1(uchar x);
//void _nop_();
void x24c01_init();
void start();
void stop();
void writex(uchar j);
uchar readx();
void clock();

unsigned char code dispcode[]={0x3f,0x06, 0x5b, 0x4f, 0x66, 
                               0x6d, 0x7d,0x07,0x7f,0x6f}; //显示段代码          
void delay1(uchar x)
{
   uint i;
   for(i=0;i//   DOG=~DOG;
}
/*void _nop_() 
{
//   uchar u;
   DOG=~DOG;
}*/
void x24c02_init()
{
   SCL=1; 
   _nop_(); 
   SDA=1; 
   _nop_();
}
void start()
{
   SDA=1; 
   _nop_(); 
   SCL=1; 
   _nop_(); 
   SDA=0; 
   _nop_(); 
   SCL=0; 
   _nop_();
}
void stop()
{
   SDA=0; 
   _nop_(); 
   SCL=1; 
   _nop_(); 
   SDA=1; 
   _nop_();
}
void writex(uchar j)
{
   uchar i,temp;
   temp=j;
   for (i=0;i<8;i++)
   {
      temp=temp<<1;
   SCL=0; 
   _nop_(); 
   SDA=CY; 
   _nop_(); 
   SCL=1; 
   _nop_();
   }
   SCL=0; 
   _nop_(); 
   SDA=1; 
   _nop_();
}
uchar readx()
{
   uchar i,j,k=0;
   SCL=0; _nop_(); SDA=1;
   for (i=0;i<8;i++)
   {
      _nop_();
   SCL=1; 
   _nop_();
      if (SDA==1) 
   j=1;
      else j=0;
      k=(k<<1)|j;
   SCL=0;
   }
   _nop_(); 
   return(k);
}
void clock()
{
   uchar i=0;
   SCL=1; 
   _nop_();
   while ((SDA==1)&&(i<255))
   i++;
   SCL=0; 
   _nop_();
}
uchar x24c02_read(uchar address)
{
   uchar i;
   start(); writex(0);
   clock(); writex(address);
   clock(); start();
   writex(0xa1); clock();
   i=readx(); stop();
   delay1(10);
   return(i);
}
void x24c02_write(uchar address,uchar info)
{
   EA=0;
   start(); writex(0);
   clock(); writex(address);
   clock(); writex(info);
   clock(); stop();
   EA=1;
   delay1(50);
}

void delay(int us)
{ 
  int s; 
  for ( s=0; s}

void disp(unsigned char data_X)
{
   P3_1=0;
   P2=~dispcode[data_X/10];
   P3_0=1; 
   delay(200);

   P3_0=0;
   P2=~dispcode[data_X%10];
   P3_1=1;
   delay(200); 
}

void main(void) 
{

  while(1) 
  {                          
//     uchar data a=2,b=45,c=0;
     uchar  a=2,b=55,c=0;
  x24c02_init();
  x24c02_write(a,b);
  delay(200);
  c=x24c02_read(a);
 
  if(c==b)led=0;
  led2=0;
  disp(c);

  }
}
/*====================================================================//
                            main  (){
                          uchar data a=2,b=10,c=0;
                             x24c02_init();
                             x24c02_write(a,b);
                             delay1(200);
                             c=x24c02_read(a);

                             if(c==b)led=0;
                             led2=0;
                              
                             }
//==================================================================*/