input.lst

基于单片机4*4键盘的设计

C51 COMPILER V7.09   INPUT                                                                 12/22/2005 15:20:13 PAGE 1   


C51 COMPILER V7.09, COMPILATION OF MODULE INPUT
OBJECT MODULE PLACED IN input.OBJ
COMPILER INVOKED BY: D:\Program Files\C51\BIN\C51.EXE input.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include<reg51.h>
   2          unsigned char code tab[4][4]={{'1','4','7','#'},
   3                                                  {'2','5','8','0'},
   4                                                  {'3','6','9','*'},
   5                                                  {'A','B','C','D'}};       //0到F的16个键植
   6          
   7          void delay(unsigned char a)
   8                  {
   9   1              unsigned char i;
  10   1              while(a--)
  11   1                      for(i=100;i>0;i--)
  12   1                              ;
  13   1              }
  14          
  15          char kbscan()          //键盘扫描
  16                  {
  17   1              unsigned char hang,lie;
  18   1              if(P3!=0x0f)
  19   1              delay(5);
  20   1              if(P3!=0x0f)
  21   1                      {
  22   2                      switch(P3&0xf0)
  23   2                                      {
  24   3                                      case 0x10:hang=0;break;
  25   3                                      case 0x20:hang=1;break;
  26   3                                      case 0x40:hang=2;break;
  27   3                                      case 0x80:hang=3;break;
  28   3                                      }
  29   2                      P3=0xf0;
  30   2                      P3=0xf0;
  31   2                      switch(P3&0x0f)
  32   2                                      {
  33   3                                      case 1:lie=0;break;
  34   3                                      case 2:lie=1;break;
  35   3                                      case 4:lie=2;break;
  36   3                                      case 8:lie=3;break;
  37   3                                      }
  38   2                      P3=0x0f;
  39   2                      while(P3!=0x0f);
  40   2                      return (tab[hang][lie]);
  41   2                      }
  42   1              return 0;
  43   1              }
  44          
  45          
  46          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    158    ----
   CONSTANT SIZE    =     16    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----       2
   IDATA SIZE       =   ----    ----
C51 COMPILER V7.09   INPUT                                                                 12/22/2005 15:20:13 PAGE 2   

   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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