代码没有问题，但是烧写进开发板没有现象，是什么原因啊

Question

#include"iocc2530.h"
#define LED1 P1_0
#define LED2 P1_1
#define LED3 P1_3
#define LED4 P1_4
#define SW1  P1_2
unsigned int counter=0;

void delay(unsigned int time)
{ 
  unsigned int i;
  unsigned char j;
  for(i = 0; i < time; i++)
  {  
    for(j = 0; j < 240; j++)
    {   asm("NOP");
        asm("NOP");
        asm("NOP");
    }
  }
}

#pragma vector=P1INT_VECTOR
__interrupt void P1_ISR()
{
  EA=0;
  if(P1IFG&0x04)//00000100
  {
    while(SW1==0)
      delay(100);
    while(!SW1)
    {
      counter++;
    }
    P1IFG&=0xFB;//11111011
  }
  EA=1;
}


void main()
{
  P1SEL&=0xE0;//11100000
  P1DIR|=0x1B;//00011011
  P1DIR&=0xFB;//11111011,SW1
  P1INP&=0xFB;//11111011
  P2INP&=0xBF;//10111111
  IEN2|=0x10;//00010000 P1使能
  P1IEN|=0x04;//00000010 P1.2使能
  PICTL&=0xFD;//11111101 上升沿
  EA=1;
  
  LED1=0;
  LED2=0;
  LED3=0;
  LED4=0;
  while(1)
  {
  if(counter==1)
  {
    LED1=1;
  }
  else if(counter==2)
  {
    LED2=1;
  }
  else if(counter==3)
  {
    LED3=1;
  }
  else if(counter==4)
  {
    LED4=1;
  }
  else
  {
    LED1=LED2=LED3=LED4=0;
    counter=0;
  }
 }
} 

Answer 1

没有设置延时，所以led的状态人眼分辨不出来变化