2440按鍵中斷的問題

penny

#include "def.h"
#include "option.h"
#include "2440addr.h"     
#include "2440lib.h"
#include "2440slib.h"
#define KEY1 (1<<0)
#define KEY2 (1<<3)
#define KEY3 (1<<5)
#define KEY4 (1<<6)
#define LED1 (1<<5)
#define LED2 (1<<6)
#define LED3 (1<<7)
#define LED4 (1<<8)

void IRQ_KEY(void)
{
    rSRCPND&=(~(1<<5));
    rINTPND&=(~(1<<5));
    rEINTPEND&=(~((1<<8)|(1<<11)|(1<<13)|(1<<14)));
    rGPGCON = rGPGCON & (~((3 << 0) | (3 << 6) | (3 << 10) | (3 << 12)));
    if (rGPGDAT & KEY1){
        rGPBDAT |= LED1;
    }
    else {
        rGPBDAT &= ~LED1;
    }
    if (rGPGDAT & KEY2){
        rGPBDAT |= LED2;
    }
    else {
        rGPBDAT &= ~LED2;
    }
    if (rGPGDAT & KEY3){
        rGPBDAT |= LED3;
    }
    else {
        rGPBDAT &= ~LED3;
    }
    if (rGPGDAT & KEY4){
        rGPBDAT |= LED4;
    }
    else {
        rGPBDAT &= ~LED4;
    }
    rGPGCON |= (2 << 0) | (2 << 6) | (2 << 10) | (2 << 12);
}



void Main(void){
    rGPBCON = (rGPBCON & 0xfffc03ff) | 0x15400;
    rGPBDAT |= LED1 | LED2 | LED3 | LED4;
        while (1);
}  


void EINT_Init(void){
   rGPGCON &= (~((3 <<0) | (3 <<6) | (3 << 10) | (3 << 12)));
  rGPGCON |= (2 << 0) | (2 << 6) | (2 << 10) | (2 << 12);
  rEXTINT1 = rEXTINT1 & (~((7 << 0) | (7 << 12) | (7 << 20) | (7 << 24)));
  rEXTINT1 = rEXTINT1 | ((6 << 0) | (6 << 12) | (6 << 20) | (6 << 24));
  pISR_EINT8_23 = (unsigned int)IRQ_KEY;
  rPRIORITY = 0x7f;     // 使用默認的固定的優先級
rINTMOD = 0x00000000;     // 所有中斷均為IRQ中斷
  rSRCPND&=(~(1<<5));
   rINTPND&=(~(1<<5));
   rEINTPEND&=(~((1<<8)|(1<<11)|(1<<13)|(1<<14)));
  rINTMSK &= (~(1<<5)); // 使能外部中斷8_23
  rEINTMASK &= (~((1 << 8) | (1 << 11) | (1 << 13) | (1 << 14)));
}


程序MAKE后無錯誤提示，仿真運行后在板子上按鍵后LED沒有反應，調試時GO后程序有時候會跳入一個死循環：33f01608 [0xeafffffe] dcd 0xeafffffe;
但有時候會在主程序斷點停下來。
請教高手什么原因啊，是程序問題么？？

penny

有沒有人知道原因的啊，我換了個程序，還是出現上面的問題，ＧＯ后程序進入ＰＣ為33f01608 [0xeafffffe] dcd 0xeafffffe;死循環．