<code class="lang-cpp">#include<reg51.h>
#include<intrins.h>
#define uchar unsigned char
#define uint unsigned int
#define bool int
#define false 0
#define true 1
       
sbit scl=P2^6;
sbit sda=P2^7;
sbit OUT=P1^1;
       
       
       
void delayus()  
{  
                       
}  
       
void delayXms(uchar x)         
{
 uchar i;
 while(x--)
 {
  for(i=250;i>0;i--)
  {
   _nop_();
   _nop_();
   _nop_();
   _nop_();
  }
 } 
}
       
void iic_start() 
{  
    sda=1;  
    scl=1;  
    delayus();      
    _nop_();           
    sda=0;         
    delayus();     
}  
         
void iic_stop()   
{  
    sda=0;_nop_();    
    scl=1;  
    delayus();      
    sda=1;          
    delayus();     
                                 
}  
         
void iic_sendByte(uchar byteData) 
{  
    uchar i;  
    uchar temp=byteData;  
    for(i=0;i<8;i++)       {           temp="temp<<1;  "         scl="0;          "         _nop_();                 sda="CY;        "         _nop_();           _nop_();               }                scl="0;            "     _nop_();                       sda="1;            "     _nop_();   }   uchar iic_readbyte() {       uchar i,temp;       for(i="0;i<8;i++)  "         delayus();                                                  delayus();             return temp;                 bool iic_checkack() errcounts="255;"            while(sda)           if(0="=errCounts)  "         {               scl="0;          "             _nop_();               return false;         }           errcounts--;   true;       void iic_init()       delayus();   iic_sendack(bool b_ack)         if(b_ack)             else             delayus();     at24c02_writebyte(uchar address,uchar databyte)     iic_start();       iic_sendbyte(0xa0);     iic_checkack();         iic_sendbyte(address);       iic_checkack();       iic_sendbyte(databyte);     iic_stop();       delayxms(2);                } at24c02_writedata(uchar numbytes,uchar* buf) 写入任意长度数据       while(numbytes--)           at24c02_writebyte(address++,*buf++);   at24c02_readdata(uchar beginaddr,uchar datasize,uchar* 读取任意长度字节       iic_start();                       iic_sendbyte(0xa0);             iic_checkack();                 iic_sendbyte(beginaddr);       iic_checkack();                     iic_start();                   iic_sendbyte(0xa1);           iic_checkack();               while(datasize--)                     *buf++="iic_readByte();  "         iic_sendack(datasize);       iic_stop();                     main() {   unsigned char temp1[3]="{18,17,16};" temp2[3]="{0};"   iic_init();   at24c02_writedata(0x00,sizeof(temp1),temp1);   delayxms(5);   at24c02_readdata(0x00,sizeof(temp2),temp2);   while(1)   {       if(temp2[0]="=18|temp2[1]==17|temp2[2]==16)"            out="0;"   } }< code></8;i++)  ></intrins.h></reg51.h></code>