原创 keil 串口仿真

转载 http://bbs.yahoo.cn/read-htm-tid-1203793.html

#include <REG52.H>
#include <stdio.h>               

#ifdef MONITOR51                      
char code reserve [3] _at_ 0x23;       
#endif                                                                           

void main (void) {

#ifndef MONITOR51
    SCON=0x50;              
    TMOD=0x20;              
    TH1 =0xfd;
TL1 =0xfd;               
    TR1 = 1;                 
    TI  = 1;                 
#endif

  while (1) {      
    printf ("Hello World\n");  
  }
}