#define uchar unsigned char
#define uint unsigned int
#include <reg52.h>
#include <stdio.h>
#include <absacc.h>
sbit scl=P3^5; //24c02 SCL
sbit sda=P3^4; //24c02 SDA
sbit DOG=P1^7; //看門狗
uchar x24c02_read(uchar address); //從24c02的地址address中讀取一個字節數據
void x24c02_write(uchar address,uchar info); //向24c02的address地址中寫入一字節數據info
void x24c02_init(); //24c02初始化子程序
void delay1(uchar x);
void flash();
void x24c01_init();
void start();
void stop();
void writex(uchar j);
uchar readx();
void clock();
void delay1(uchar x)
{
uint i;
for(i=0;i<x;i++);
DOG=~DOG;
}
void flash()
{
uchar u;
DOG=~DOG;
}
void x24c02_init()
{
scl=1; flash(); sda=1; flash();
}
void start()
{
sda=1; flash(); scl=1; flash(); sda=0; flash(); scl=0; flash();
}
void stop()
{
sda=0; flash(); scl=1; flash(); sda=1; flash();
}
void writex(uchar j)
{
uchar i,temp;
temp=j;
for (i=0;i<8;i++){
temp=temp<<1; scl=0; flash(); sda=CY; flash(); scl=1; flash();
}
scl=0; flash(); sda=1; flash();
}
uchar readx()
{
uchar i,j,k=0;
scl=0; flash(); sda=1;
for (i=0;i<8;i++){
flash(); scl=1; flash();
if (sda==1) j=1;
else j=0;
k=(k<<1)|j; scl=0;
}
flash(); return(k);
}
void clock()
{
uchar i=0;
scl=1; flash();
while ((sda==1)&&(i<255))i++;
scl=0; flash();
}
uchar x24c02_read(uchar address)
{
uchar i;
start(); writex(0xa0);
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(0xa0);
clock(); writex(address);
clock(); writex(info);
clock(); stop();
EA=1;
delay1(50);
}






























//   24c02讀寫程序
// www.808cn.com
  #define uchar unsigned char
  #define uint unsigned int
  #include <reg52.h>
  #include <stdio.h>
  #include <absaCC.h>
  sbit scl=P3^5;  //24c02 SCL
  sbit sda=P3^4;  //24c02 SDA
  sbit DOG=P1^7;  //狗
  uchar x24c02_read(uchar address);  //從24c02的地址address中讀取一個字節數據
  void x24c02_write(uchar address,uchar info);  
  //向24c02的address地址中寫入一字節數據info
  void x24c02_init();   //24c02初始化子程序
  void delay1(uchar x);
  void flash();
  void x24c01_init();
  void start();
  void stop();
  void writex(uchar j);
  uchar readx();
  void cLOCk();
  void delay1(uchar x)
  {
     uint i;
     for(i=0;i<x;i++);
     DOG=~DOG;
  }
  void flash()
  {
     uchar u;
     DOG=~DOG;
  }
  void x24c02_init()
  {
     scl=1; flash(); sda=1; flash();
  }
  void start()
  {
     sda=1; flash(); scl=1; flash(); sda=0; flash(); scl=0; flash();
  }
  void stop()
  {
     sda=0; flash(); scl=1; flash(); sda=1; flash();
  }
  void writex(uchar j)
  {
     uchar i,temp;
     temp=j;
     for (i=0;i<8;i++){
        temp=temp<<1; scl=0; flash(); sda=CY; flash(); scl=1; 
  flash();
     }
     scl=0; flash(); sda=1; flash();
  }
  uchar readx()
  {
     uchar i,j,k=0;
     scl=0; flash(); sda=1;
     for (i=0;i<8;i++){
        flash(); scl=1; flash();
        if (sda==1) j=1;
        else j=0;
        k=(k<<1)j; scl=0;
     }
     flash(); return(k);
  }
  void cLOCk()
  {
     uchar i=0;
     scl=1; flash();
     while ((sda==1)&&(i<255))i++;
     scl=0; flash();
  }
  uchar x24c02_read(uchar address)
  {
     uchar i;
     start(); writex(0xa0);
     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(0xa0);
     cLOCk(); writex(address);
     cLOCk(); writex(info);
     cLOCk(); stop();
     EA=1;
     delay1(50);
  }



























#include <stdio.h>
#include <absacc.h>
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);  //從24c02的地址address中讀取一個字節數據
void x24c02_write(uchar address,uchar info);
  //向24c02的address地址中寫入一字節數據info
void x24c02_init();   //24c02初始化子程序
void delay1(uchar x);
void flash();
void x24c01_init();
void start();
void stop();
void writex(uchar j);
uchar readx();
void clock();
void delay1(uchar x)
{
   uint i;
   for(i=0;i<x;i++);
   DOG=~DOG;
}
void flash()
{
   uchar u;
   DOG=~DOG;
}
void x24c02_init()
{
   scl=1; flash(); sda=1; flash();
}
void start()
{
   sda=1; flash(); scl=1; flash(); sda=0; flash(); scl=0; flash();
}
void stop()
{
   sda=0; flash(); scl=1; flash(); sda=1; flash();
}
void writex(uchar j)
{
   uchar i,temp;
   temp=j;
   for (i=0;i<8;i++){
      temp=temp<<1; scl=0; flash(); sda=CY; flash(); scl=1; flash();
   }
   scl=0; flash(); sda=1; flash();
}
uchar readx()
{
   uchar i,j,k=0;
   scl=0; flash(); sda=1;
   for (i=0;i<8;i++){
      flash(); scl=1; flash();
      if (sda==1) j=1;
      else j=0;
      k=(k<<1)|j; scl=0;
   }
   flash(); return(k);
}
void clock()
{
   uchar i=0;
   scl=1; flash();
   while ((sda==1)&&(i<255))i++;
   scl=0; flash();
}
uchar x24c02_read(uchar address)
{
   uchar i;
   start(); writex(0xa0);
   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(0xa0);
   clock(); writex(address);
   clock(); writex(info);
   clock(); stop();
   EA=1;
   delay1(50);
}


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