threeio.lst

一个基于单片机IO的键盘扫描函数

C51 COMPILER V8.17   THREEIO                                                               04/14/2009 21:11:02 PAGE 1   


C51 COMPILER V8.17, COMPILATION OF MODULE THREEIO
OBJECT MODULE PLACED IN ThreeIO.OBJ
COMPILER INVOKED BY: D:\ѧϰ\keil 3\C51\BIN\C51.EXE ThreeIO.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include<reg52.h>
   2          #include<ThreeIO.h>
   3          
   4          uint8 Keyscan(void)
   5          {
   6   1       uint8 x;
   7   1       x = 0x00;
   8   1       key_dat |= 0x07;
   9   1       x = key_dat & 0x07;
  10   1       if(x == 0x07)
  11   1       {
  12   2        key_dat = key_dat&0xfe;
  13   2        x = key_dat&0x07;
  14   2        x = x/2 + 7;
  15   2        if(x == 10)
  16   2        {
  17   3         key_dat = key_dat | 0x07;
  18   3         key_dat = key_dat | 0xfd;
  19   3         x= key_dat & 0x07;
  20   3         x = (x + 1)/2 + 10;
  21   3         if(x == 13)
  22   3         {
  23   4          key_dat = key_dat | 0x07;
  24   4              key_dat = key_dat & 0xfb;
  25   4              x = key_dat & 0x07;
  26   4              x = x + 13;
  27   4         }
  28   3        }
  29   2       }
  30   1       return x;
  31   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     67    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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