外部中断驱动程序出了问题，恳请各位高手，前辈，指指路！谢谢

刚开始学习写驱动程序，想用按键触发外部中断，但是只有EINT1响应，其他的2~7都不响应按键，进不到中断服务子程序中~~后来改写后，用AXD测试，不按下按键也会无序的进入到各个中断服务子程序中~~不知道是哪里出了错，请各位高手们帮忙看看，不胜感激！！！！代码如下：
void EINT1_ISR(void)
{
Intr_ClearFlag(Vic_EINT1);
//KeyPress = KEY_ISR_HEAL_SWITCH;
  //OSMboxPost(KeyMbox,&KeyPress);
}
void EINT2_ISR(void)
{
Intr_ClearFlag(Vic_EINT2);
  //KeyPress = KEY_ISR_RETURN;
  //OSMboxPost(KeyMbox,&KeyPress);
}
void EINT3_ISR(void)
{
Intr_ClearFlag(Vic_EINT3);
//KeyPress = KEY_ISR_ALARM_CLEAR;
//OSMboxPost(KeyMbox,&KeyPress);
}
void EINT4_7_ISR(void)
{
Intr_ClearFlag(Vic_EINT4_7);


if(rEINTPEND&(1<<4))
{
KeyPress = KEY_ISR_DOWN;
rEINTPEND |= 1<< 4;
//OSMboxPost(KeyMbox,&KeyPress); 
}
if(rEINTPEND&(1<<5))
{
KeyPress = KEY_ISR_LEFT;
rEINTPEND |= 1<< 5;
//OSMboxPost(KeyMbox,&KeyPress);
}
if(rEINTPEND&(1<<6))
{
KeyPress = KEY_ISR_RIGHT;
rEINTPEND |= 1<< 6;
OSMboxPost(KeyMbox,&KeyPress); 
}
if(rEINTPEND&(1<<7))
{
KeyPress = KEY_ISR_UP;
rEINTPEND |= 1<< 7;
OSMboxPost(KeyMbox,&KeyPress);
}
}

void KeyScan_Init(void)
{
vicIrqDisable(Vic_EINT0 ) ;
vicIrqDisable(Vic_EINT1 ) ;
vicIrqDisable(Vic_EINT2 ) ;
vicIrqDisable(Vic_EINT3 ) ;
vicIrqDisable(Vic_EINT4_7 ) ;
  rGPFCON =( rGPFCON & (~((3<<4)|(3<<0)|(3<<8)|(3<<2)|(3<<6)|(3<<10)|(3<<12)|(3<<12)|(3<<14)))) | ((2<<4)|(2<<0)|(2<<6)|(2<<8)|(2<<2)|(2<<10)|(2<<12)|(2<<14)) ;
rEXTINT0 &= ~(7|(7<<4)|(7<<8)|(7<<16)|(7<<20)|(7<<24)|(7<<28));
rEXTINT0 |= (BOTH_EDGE|(FALLING_EDGE<<4)|(FALLING_EDGE<<8)|(FALLING_EDGE<<16)|(FALLING_EDGE<<20)|(FALLING_EDGE<<24)|(FALLING_EDGE<<28)); //set eint0,1,2,4 falling edge int
  // 4-7 AND 8-2X MUST CONFIG BY FOLLOWING REGISTER
  rEINTPEND |= (1<<4)|(1<<5)|(1<<6)|(1<<7);
  rEINTMASK &= ~((1<<4)|(1<<5)|(1<<6)|(1<<7));
  rGPFUP =0xffff;  
  ClearPending( (Vic_EINT0<<1)|(Vic_EINT1<<1)|(Vic_EINT2<<1)|(Vic_EINT3<<1) )
   
vicIrqFuncSet(Vic_EINT0 ,EINT0_ISR ) ;
vicIrqFuncSet(Vic_EINT1 ,EINT1_ISR ) ;
vicIrqFuncSet(Vic_EINT2 ,EINT2_ISR ) ;
vicIrqFuncSet(Vic_EINT3 ,EINT3_ISR ) ;
vicIrqFuncSet(Vic_EINT4_7 ,EINT4_7_ISR ) ;

vicIrqEnable(Vic_EINT0 ) ;
vicIrqEnable(Vic_EINT1 ) ;
vicIrqEnable(Vic_EINT2 ) ;
vicIrqEnable(Vic_EINT3 ) ;
vicIrqEnable(Vic_EINT4_7 ) ;
}

中断推出前没有清空