h11.c

51单片机程序C和汇编

#include <reg51.h>

sbit LED = P1^0;
bit LEDBuf;

void ExtInt0() interrupt 0
{
  LEDBuf = !LEDBuf;
  LED = LEDBuf;
}

void main()
{
  LEDBuf = 0;
  LED    = 0;
  TCON   = 0x01;   // 外部中断0下降沿触发
  IE     = 0x81;   // 打开外部中断允许位(EX0)及总中断允许位(EA)
  while (1) ;
}