代码：

#include <mega16.h>
#include <stdio.h>
#include <i2c.h>
#include <delay.h>
// Declare your global variables here
#define EEPROM_BUS_ADDRESS 0xa0
#asm
    .equ __i2c_port=0x15
    .equ __sda_bit=1    
    .equ __scl_bit=0
#endasm
unsigned char eeprom_read(unsigned int address)
{
    unsigned char data;
    i2c_start();
    i2c_write(EEPROM_BUS_ADDRESS);
    i2c_write(address>>8);
    i2c_write(address);
    i2c_start();
    i2c_write(EEPROM_BUS_ADDRESS|1);
    data=i2c_read(0);
    i2c_stop();
    return data;
}
void eeprom_write(unsigned int address,unsigned char data)
{
    
    i2c_start();
    i2c_write(EEPROM_BUS_ADDRESS);
    i2c_write(address>>8);
    i2c_write(address);
    
    i2c_write(data);
    
    i2c_stop();   
    delay_ms(10);
    
}
void main(void)
{
// Declare your local variables here

     unsigned char i;
     PORTA=0XFF;
     DDRA=0XFF;
     UCSRA=0;
     UCSRB=0X18;
     UCSRC=0X86;
     UBRRH=0X00;
     UBRRL=0X19;
     i2c_init();
     eeprom_write(0x00aa,0x5a);
     i=eeprom_read(0x00aa);
     if(i==0x5a)
           PORTA.7=0;
     else
           PORTA.6=0; 
while (1)
      {
      // Place your code here

      }
}

仿真效果图：