dsjsbx.c

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()
         {  uchar data l;
	        TMOD=0X02;
	        TR0=1;
	        TH0=-30;
	        TL0=-30;

	     while(1)
	        {while(TF0==0);
		     TF0=0;
             l=l+1;
		     if(l==10)
		       {m=!m;l=0;}
		     }
	      }