time0.c

主要用于在单片机中可以随时变更的延时操作,采用单片机的定时器实现

//1s delay ,中断方式 CLK=6MHZ,100ms外部增加10倍,共1s
#include<reg51.h>
#define uchar unsigned char
#define uint unsigned char
sbit p10=P1^0;
uchar n;
uchar delaytime;

time0() interrupt 1 using 1
{
  n--;
  if(n==0)
  {
   p10=!p10;
   n=delaytime;
  }
}

void main()
{
  delaytime=20;
  n=delaytime;
  TMOD=0x01;
  TL0=0x3c;
  TH0=0xb0;
  EA=1;
  ET0=1;
  TR0=1;
  while(1)
  {
  }
}