dsjsbxh.bak

51定时器常用例子包括测频率测脉宽产生波形

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

	void main()
         {  
	    TMOD=0X0e;
	    TR0=1;
	    TH0=-6;
	    TL0=-6;
	    
	     while(1)
	        {while(TF0==0);
		  TF0=0;
		  
		  
		    m=!m;
		   
		
		       
	         }
	  
          }