4-1.lst

《单片机C语言编程与实例》的代码,使用keil编程环境,供大家参考

C51 COMPILER V7.00  4_1                                                                    08/03/2005 13:18:42 PAGE 1   


C51 COMPILER V7.00, COMPILATION OF MODULE 4_1
OBJECT MODULE PLACED IN 4-1.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE 4-1.c DEBUG OBJECTEXTEND

stmt level    source

   1          #include<reg51.h>
   2          #include<absacc.h>
   3          #define uchar unsigned char
   4          #define COM8255 XBYTE[0x007F]           //命令口地址
   5          #define PA8255 XBYTE[0x00FC]                    //A口地址
   6          #define PC8255 XBYTE[0x00F]                     //C口地址
   7          void printchar(uchar *p);
   8          
   9          void main(void)                                         //主函数
  10          {
  11   1       uchar idata chara[]="HELLO";                   //测试用的字符串
  12   1       COM8255=0x8E;                                  //输出方式选择命令字
  13   1       printchar(chara);                                              //打印字符串
  14   1      }
  15          
  16          void printchar(uchar *p)                                //打印字符串子函数
  17          {
  18   1       while(*p!='\0')
  19   1       {while((0x80&PC8255)!=0);                      //查询等待打印机的BUSY状态
  20   2        PA8255=*p;                                            //输出字符
  21   2        COM8255=0x00;                                 //模拟STB脉冲
  22   2        COM8255=0x01;
  23   2        p++;
  24   2       }
  25   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     68    ----
   CONSTANT SIZE    =      6    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----    ----
   IDATA SIZE       =   ----       6
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


C51 COMPILATION COMPLETE.  0 WARNING(S),  0 ERROR(S)