5-11.c

单片机C51的学习程序,内包含大部分的功能学习,适合初学者用.

#include <stdio.h>
#include <reg51.h> 

 main()
{
 union
 { 
 int i;
 struct
   { 
    char first;
    char second;
   }half;
  }number;
  number.i=0x4241;
  SCON = 0x50; 
  TMOD |= 0x20;
  TH1=TL1=0xfd; 
  TR1 = 1;
  TI = 1; 
  printf("%c%c\n",number.half.first,number.half.second);
  number.half.first='a';
  number.half.second='b';
  printf("%x\n",number.i);
  getchar();
     }