keyborad.lst

上学时做的一个51单片机按键显示程序

C51 COMPILER V7.07   KEYBORAD                                                              11/25/2005 20:21:59 PAGE 1   


C51 COMPILER V7.07, COMPILATION OF MODULE KEYBORAD
OBJECT MODULE PLACED IN keyborad.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE keyborad.c BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          /*
   2          * Copyright(c)2005 - 2009 danise .China
   3          * All rights reserved.
   4          * Redistribution and use in source and bianry forms
   5          * with or without modification ,are permitted provided
   6          * that following conditions are met:
   7          * 
   8          * 1.Redistrubution of source code must retain the 
   9          * above copyright notice,this list of conditions and
  10          * following disclaimer.
  11          * 
  12          * 2.Redistributions in binary form must reproduce the 
  13          * above copyright notice,this list of conditions and 
  14          * following disclaimer in the documentation and /or other
  15          * materials provided with the distribution.
  16          * 
  17          * Alternately, this acknowledgment may appear in the software
  18          * itself,if and wherever such third-party acknowledgements
  19          * normally appear.
  20          *
  21          * This software is designed for key board and led display.
  22          * 
  23                  
  24          */
  25          #include"include/keyboard.h"
  26          #include "include/datatypes.h"
  27          #include "include/display.h"
  28          #include "include/global.h"
  29          #include "include/system.h"
  30          /** get key but not a safe key 
  31            using P0 port
  32          */
  33          
  34          UINT8 keyok = 0;
  35          UINT8 keyage = 0; /* */
  36          UINT8 oldkey = 0 ;
  37          UINT8 Scankey(void)
  38          {
  39   1              UINT8 tempkeycode=0xff; 
  40   1              UINT8 AA;
  41   1              UINT8 BB;
  42   1              P0=0x0f;
  43   1              AA=P0;
  44   1              AA&=0x0f;
  45   1              BB=AA;
  46   1              P0=0x0f0;
  47   1              AA=P0;
  48   1              AA&=0xf0;
  49   1              tempkeycode=AA|BB;
  50   1              return tempkeycode;                             
  51   1      
  52   1      }
  53          /*
  54          */
  55          INT8 GetSafeKeyValue()
C51 COMPILER V7.07   KEYBORAD                                                              11/25/2005 20:21:59 PAGE 2   

  56          {
  57   1              UINT8 idata temp;
  58   1              INT8 idata rKeyVal;
  59   1              temp = Scankey();
  60   1              if(0xff!=temp){
  61   2                      if(!( temp^oldkey )){/* if same */
  62   3                              oldkey = temp;
  63   3                              keyage ++;
  64   3                              if(! keyok ){ /* never response */
  65   4                                      if( keyage == 3 ){
  66   5                                              switch ( temp )
  67   5                                              {       
  68   6                                                      case 0x77:      rKeyVal=0; break;
  69   6                                                      case 0xBD:      rKeyVal=1; break;
  70   6                                                      case 0xBB:      rKeyVal=2; break;
  71   6                                                      case 0xB7:      rKeyVal=3; break;
  72   6                                                      case 0xED:      rKeyVal=4; break;
  73   6                                                      case 0xEB:      rKeyVal=5; break;
  74   6                                                      case 0xE7:      rKeyVal=6; break;
  75   6                                                      case 0xDD:      rKeyVal=7; break;
  76   6                                                      case 0xDB:      rKeyVal=8; break;
  77   6                                                      case 0xD7:      rKeyVal=9; break;
  78   6                                                      case 0x7B:      rKeyVal=10; break;//"."
  79   6                                                      case 0x7D:      rKeyVal=11; break;//"BACK"
  80   6                                                      case 0xDE:      rKeyVal=12; break;//"CLEAR ALL"
  81   6                                                      case 0xEE:      rKeyVal=13; break;//"+"
  82   6                                                      case 0xBE:      rKeyVal=14; break;//"*"
  83   6                                                      case 0x7E:      rKeyVal=15; break;//"enter"
  84   6                                                      default:        rKeyVal=-1;     
  85   6                                              }
  86   5                                       keyok = 1;
  87   5                                       keyage = 0;
  88   5                                       /* do your work ** begin **with key value */
  89   5                                       /* clr crc save */
  90   5                                       sreensaveclk = 0;
  91   5                                       scrflag = 0;
  92   5                                   return rKeyVal ;
  93   5                                       /*  ** end ** */                                       
  94   5                                      }
  95   4                                      else{ /*key age is not old enough */
  96   5                                              return (-1);
  97   5                                      }
  98   4      
  99   4      
 100   4                              }
 101   3                              else{ /* responsed */
 102   4                                      return (-1);
 103   4                              }
 104   3                      }
 105   2                      else{/* if different */
 106   3                              keyok = 0;
 107   3                              keyage = 0;
 108   3                              oldkey = temp;
 109   3                              return (-1);
 110   3                      }
 111   2                      
 112   2              }
 113   1              else{
 114   2                      keyok = 0;
 115   2                      keyage = 0;
 116   2                      return (-1);
 117   2              }
C51 COMPILER V7.07   KEYBORAD                                                              11/25/2005 20:21:59 PAGE 3   

 118   1      
 119   1              
 120   1      }
 121          void AnalyseKeyVal(UINT8 keyVal )
 122          {
 123   1              
 124   1              if (keyVal <0) return; /* no key press */
 125   1              if(keyVal>=0 && keyVal<=0xa ){
 126   2              /* data key value */
 127   2                      addKyeValHexBuf( keyVal );
 128   2              }
 129   1              else{//>0
 130   2              /* cmd key value*/
 131   2              /*
 132   2                      1. LEDS process
 133   2                      2. I2C  process
 134   2              */
 135   2                      switch ( keyVal )
 136   2                      {
 137   3                              case 11:  backspace(); break;
 138   3                              case 12:  clearallleds();break;
 139   3                              case 15:  enter();break;
 140   3                      
 141   3                      }
 142   2              }
 143   1              
 144   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    316    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      3       1
   IDATA SIZE       =   ----       2
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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