key.lst

单片机的键盘控制程序和Led显示程序

C51 COMPILER V7.50   KEY                                                                   09/07/2007 13:44:06 PAGE 1   


C51 COMPILER V7.50, COMPILATION OF MODULE KEY
OBJECT MODULE PLACED IN key.OBJ
COMPILER INVOKED BY: C:\Program Files\keil\C51\BIN\C51.EXE key.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include "key.h"
   2          
   3          static uchar Key_value = 0x00 ;
   4          static uchar Key_line = 0x01 ;
   5          static uchar Key_return = 0x10 ;
   6          uchar Read_key()
   7          {
   8   1              uchar Key_value = 0x00 ;
   9   1              uchar Key_line = 0x01 ;
  10   1              uchar Key_return = 0x10 ;
  11   1              uchar i = 0 ;
  12   1      
  13   1      
  14   1              Key_line = 0x01 ;
  15   1              for (i = 0; i < 4; i++)
  16   1              {
  17   2                      KEY_PORT = ~Key_line ;
  18   2                      KEY_PORT = ~Key_line ;
  19   2                      Key_value = KEY_PORT & KEY_MASK ;
  20   2                      if (Key_value == KEY_MASK)//没有按键按下
  21   2                      {
  22   3                              Key_line <<= 1 ;
  23   3                      }
  24   2                      else
  25   2                      {
  26   3                              Delay10ms(1) ;
  27   3                              if (Key_value == (KEY_PORT & KEY_MASK))//延时后再次确认按键
  28   3                              {
  29   4                                      switch (Key_value | Key_line)
  30   4                                      {
  31   5                                              case 0xe1: 
  32   5                                                      Key_return = K1_1 ;
  33   5                                                      break ; 
  34   5                                              case 0xd1: 
  35   5                                                      Key_return = K1_2 ;
  36   5                                                      break ; 
  37   5                                              case 0xb1: 
  38   5                                                      Key_return = K1_3 ;
  39   5                                                      break ; 
  40   5                                              case 0x71: 
  41   5                                                      Key_return = K1_4 ;
  42   5                                                      break ;
  43   5              
  44   5                                              case 0xe2: 
  45   5                                                      Key_return = K2_1 ;
  46   5                                                      break ;                                         
  47   5                                              case 0xd2: 
  48   5                                                      Key_return = K2_2 ;
  49   5                                                      break ;                                         
  50   5                                              case 0xb2: 
  51   5                                                      Key_return = K2_3 ;
  52   5                                                      break ; 
  53   5                                              case 0x72: 
  54   5                                                      Key_return = K2_4 ;
  55   5                                                      break ; 
C51 COMPILER V7.50   KEY                                                                   09/07/2007 13:44:06 PAGE 2   

  56   5      
  57   5                                              case 0xe4: 
  58   5                                                      Key_return = K3_1 ;
  59   5                                                      break ; 
  60   5                                              case 0xd4: 
  61   5                                                      Key_return = K3_2 ;
  62   5                                                      break ; 
  63   5                                              case 0xb4: 
  64   5                                                      Key_return = K3_3 ;
  65   5                                                      break ; 
  66   5                                              case 0x74: 
  67   5                                                      Key_return = K3_4 ;
  68   5                                                      break ;
  69   5              
  70   5                                              case 0xe8: 
  71   5                                                      Key_return = K4_1 ;
  72   5                                                      break ; 
  73   5                                              case 0xd8: 
  74   5                                                      Key_return = K4_2 ;
  75   5                                                      break ; 
  76   5                                              case 0xb8: 
  77   5                                                      Key_return = K4_3 ;
  78   5                                                      break ; 
  79   5                                              case 0x78: 
  80   5                                                      Key_return = K4_4 ;
  81   5                                                      break ; 
  82   5                                              default : Key_return = 0x0e ;
  83   5                                      }
  84   4                              while(Key_value ==( KEY_PORT & KEY_MASK)) ;
  85   4                                      break ;
  86   4                              }
  87   3                              Key_line <<= 1 ;
  88   3                      }               
  89   2              }
  90   1              return(Key_return) ;
  91   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    225    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      3       4
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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