dsjs2.bak

C51单片机定时器常用例子

	#include"at89x52.h"
	#define uchar unsigned char
	#define uint  unsigned int
	sbit m=P1^0;
        

	void main()

        {    TMOD=0X10;
	     TR1=1;

           while(1)
	    {
	      	
	      TH1=(-5000)>>8;
	      TL1=-5000;
	      while(TF1==0);
		{ TF1=0;m=0;
		  TH1=(-12000)>>8;
		  TL1=-12000;
		  while(TF1==0);
		    {TF1=0;m=1;}
		 }
	      }
	  }