关于IIC的地址有关问题

关于IIC的地址问题
各位兄弟 
请问IIC从设备的地址是怎么设置的？不是物理地址吧？是不是芯片自己定义的？ 
我这有个程序是关于2410通过IIC向AT24C02（EEPROM）中写数据和读取数据的 
为什么这里面设置了两个从机地址？：：： 
void Test_Iic2(void) 
{ 
  unsigned int i,j,save_E,save_PE; 
  static U8 data[256]; 
   
  Uart_Printf("IIC Test(Polling) using AT24C02\n"); 

  save_E = rGPECON; 
  save_PE = rGPEUP; 
  rGPEUP ¦= 0xc000; //Pull-up disable 
  rGPECON &= ~0xf0000000; 
  rGPECON ¦= 0xa0000000; //GPE15:IICSDA , GPE14:IICSCL 

  //Enable ACK, Prescaler IICCLK=PCLK/16, Enable interrupt, Transmit clock value Tx //clock=IICCLK/16 
  rIICCON = (1 < <7) ¦ (0 < <6) ¦ (1 < <5) ¦ (0xf); //0xaf 

  rIICADD = 0x10; //2410 slave address = [7:1]
  rIICSTAT = 0x10; //IIC bus data output enable(Rx/Tx) 

  Uart_Printf("Write test data into AT24C02\n"); 

  for(i=0;i <256;i++) 
  _Wr24C080(0xa0,(U8)i,i);//void _Wr24C080(U32 slvAddr,U32 addr,U8 data)
  for(i=0;i <256;i++) 
  data[i] = 0; 

  Uart_Printf("Read test data from AT24C02\n"); 
  for(i=0;i <256;i++) 
  _Rd24C080(0xa0,(U8)i,&(data[i])); 

  for(i=0;i <8;i++) 
  { 
  for(j=0;j <8;j++) 
  Uart_Printf("%2x ",data[i*8+j]); 
  Uart_Printf("\n"); 
  } 
   
  Uart_Printf("OK! Write data is same to Read data!\n"); 
  rGPEUP = save_PE; 
  rGPECON = save_E; 
} 
void _Wr24C080(U32 slvAddr,U32 addr,U8 data) 
{ 
  _iicMode = WRDATA; 
  _iicPt = 0; 
  _iicData[0] = (U8)addr; 
  _iicData[1] = data; 
  _iicDataCount = 2; 
   
  rIICDS = slvAddr; //0xa0
  //Master Tx mode, Start(Write), IIC-bus data output enable 
  //Bus arbitration sucessful, Address as slave status flag Cleared, 
  //Address zero status flag cleared, Last received bit is 0 
  rIICSTAT = 0xf0;  
  //Clearing the pending bit isn't needed because the pending bit has been cleared. 
  while(_iicDataCount!=-1) 
  Run_IicPoll(); 

  _iicMode = POLLACK; 

  while(1) 
  { 
  rIICDS = slvAddr; 
  _iicStatus = 0x100; //To check if _iicStatus is changed 
  rIICSTAT = 0xf0; //Master Tx, Start, Output Enable, Sucessful, Cleared, Cleared, 0 
  rIICCON = 0xe0;//0xaf; //Resumes IIC operation. //hzh 
  while(_iicStatus==0x100)  
  Run_IicPoll(); 
   
  if(!(_iicStatus & 0x1)) 
  break; //When ACK is received 
  } 
  rIICSTAT = 0xd0; //Master Tx condition, Stop(Write), Output Enable 
  rIICCON = 0xe0;//0xaf; //Resumes IIC operation. //hzh 
  Delay(1); //Wait until stop condtion is in effect. 
  //Write is completed. 

} 


[解决办法]
1、“IIC Test(Polling) using AT24C02” 那么 AT24C02 这个芯片有自己的IIC 地址 也许是你这里的0XA0 吧
2、IIC标准中 读写 操作时通过地址字节的 最末位来确认的， Bit 0 =0 代表IIC写 Bit 0 = 1 代表 IIC 读取At24C02操作， 

详细请先看IIC协议标准 和 芯片资料的 IIC 部分讲解。