2440 IIC 总是不发生中断,该怎么解决

2440 IIC 总是不发生中断
平台是2440，编译器是MDK，现在在做裸机的IIC读写AT24C02，但是总是不发生中断
代码如下[code=C/C++][/code]
#include <string.h>
#include "2440addr.h"
#include "2440lib.h"
#include "def.h"
#include "IIC.h"

static U8 _iicData[IICBUFSIZE];
static volatile int _iicDataCount;
static volatile int _iicStatus;
static volatile int _iicMode;
static int _iicPt;

//===================================================================
// SMDK2440 IIC configuration
// GPE15=IICSDA, GPE14=IICSCL
// "Interrupt mode" for IIC block
//=================================================================== 

//******************[ Test_Iic ]**************************************
void Test_Iic(void)
{
  unsigned int i,j,save_E,save_PE;
  static U8 data[256];

  Uart_Printf("\nIIC Test(Interrupt) using AT24C02\n");

  save_E = rGPECON;
  save_PE = rGPEUP;
  rGPEUP |= 0xc000; //Pull-up disable
  rGPECON |= 0xa00000; //GPE15:IICSDA , GPE14:IICSCL 

  pISR_IIC = (unsigned)IicInt;
  rINTMSK &= ~(BIT_IIC);

  //Enable ACK, Prescaler IICCLK=PCLK/16, Enable interrupt, Transmit clock value Tx clock=IICCLK/16
  // If PCLK 50.7MHz, IICCLK = 3.17MHz, Tx Clock = 0.198MHz
  rIICCON = (1<<7) | (0<<6) | (1<<5) | (0xf);

  rIICADD = 0x10; //2440 slave address = [7:1] 地址不是 000 吗？为什么这里配置为0001000呢 只要后三位是0应该就行了。
  rIICSTAT = 0x10; //IIC bus data output enable(Rx/Tx) （模式没有进行配置）
rIICLC = (1<<2)|(1); // Filter enable, 15 clocks SDA output delay added by junon （应该是5clocks）
   
  Uart_Printf("Write test data into AT24C02\n");

  for(i=0;i<256;i++) //这里进行了256次写操作，也就是函数Wr24C080(0xa0,(U8)i,i);每次只进行一个数据的写操作。
  Wr24C080(0xa0,(U8)i,i); //slvaddr, addr, data
  //而且从i从0递增到255也能够看出，写数据的地址是从EEPROM的最低地址0进行写直到，256
   
  for(i=0;i<256;i++)
  data[i] = 0;

  Uart_Printf("Read test data from AT24C02\n");
   
  for(i=0;i<256;i++)
  Rd24C080(0xa1,(U8)i,&(data[i])); 

  //Line changed 0 ~ f
  for(i=0;i<16;i++)
  {
  for(j=0;j<16;j++)
  Uart_Printf("%2x ",data[i*16+j]);
  Uart_Printf("\n");
  }
  rINTMSK |= BIT_IIC;  
  rGPEUP = save_PE;
  rGPECON = save_E;
}


//*************************[ Wr24C080 ]****************************
void Wr24C080(U32 slvAddr,U32 addr,U8 data)
{
  _iicMode = WRDATA;
  _iicPt = 0;
  _iicData[0] = (U8)addr;
  _iicData[1] = data;
  _iicDataCount = 2;
   
  rIICDS = slvAddr; //0xa0
  rIICSTAT = 0xf0; //MasTx,Start
  //Clearing the pending bit isn't needed because the pending bit has been cleared.
   
  while(_iicDataCount!=-1);

  _iicMode = POLLACK; //改变模式？？？？

  while(1)
  {
  rIICDS = slvAddr;
  _iicStatus = 0x100;
  rIICSTAT = 0xf0; //MasTx,Start
  rIICCON = 0xaf; //Resumes IIC operation. 
   
  while(_iicStatus==0x100);
   
  if(!(_iicStatus&0x1))