example.c

51单片机实验程序

#include<reg51.h>

void	main(void)
{   bit  s=0; 
	xdata  	unsigned char	memory[3];
    unsigned char j, k
	TMOD=0x20;
    TL1=0xfd;
 	TH1=0Xfd;
 	SCON=0X50;
 	PCON=0x00;
    TR1=1;
 
    while(1)
    {
		while(RI==0)
		{;
        }


  		RI=0;
  		memory[s]=SBUF;
        s++;


        if(s==1)
          { 
                for(j=0;j<100;j++)
                  for(k=0;k<20;k++)
                    {;
		             }
         	SBUF=memory[2];
          } 

   
 	     while(TI==0)
        {
		}
  		TI=0;
    }
 }