keyscan.lst

矩阵按键程序

C51 COMPILER V8.02   KEYSCAN                                                               12/08/2008 23:21:50 PAGE 1   


C51 COMPILER V8.02, COMPILATION OF MODULE KEYSCAN
OBJECT MODULE PLACED IN keyscan.OBJ
COMPILER INVOKED BY: d:\Keil\C51\BIN\C51.EXE keyscan.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include<AT89X51.H>
   2          #define uchar unsigned char
   3          #define uint unsigned int
   4           uchar k=0; 
   5          /////////////////////////////////延时
   6          void delaynms(uint  n)
   7          {uchar i;
   8   1      while(n--)
   9   1              {for(i=0;i<125;i++);
  10   2              }
  11   1      }
  12          //////////////////////////////
  13          uchar GetKey()
  14          {uchar temp,key=0xff;
  15   1      P2=0x0f;
  16   1      temp=P2;
  17   1      if(temp!=0x0f)
  18   1              {delaynms(50);
  19   2                      temp=P2;
  20   2                      if(temp!=0x0f)
  21   2                              {       
  22   3                              P2=0xef;
  23   3                              temp=P2;
  24   3                              switch (temp)
  25   3                                      {
  26   4                                      case 0xe7:key=0;break;
  27   4                                      case 0xeb:key=1;break;
  28   4                                      case 0xed:key=2;break;
  29   4                                      case 0xee:key=3;break;
  30   4                                      default:break;
  31   4                                      }
  32   3      
  33   3                              P2=0xdf;
  34   3                              temp=P2;
  35   3                              switch (temp)
  36   3                                      {
  37   4                                      case 0xd7:key=4;break;
  38   4                                      case 0xdb:key=5;break;
  39   4                                      case 0xdd:key=6;break;
  40   4                                      case 0xde:key=7;break;
  41   4                                      default:break;
  42   4                                      }
  43   3              
  44   3                              P2=0xbf;
  45   3                              temp=P2;
  46   3                              switch (temp)
  47   3                                      {
  48   4                                      case 0xb7:key=8;break;
  49   4                                      case 0xbb:key=9;break;
  50   4                                      case 0xbd:key=10;break;
  51   4                                      case 0xbe:key=11;break;
  52   4                                      default:break;
  53   4                                      }
  54   3              
  55   3                              P2=0x7f;
C51 COMPILER V8.02   KEYSCAN                                                               12/08/2008 23:21:50 PAGE 2   

  56   3                              temp=P2;
  57   3                              switch (temp)
  58   3                                      {
  59   4                                      case 0x77:key=12;break;
  60   4                                      case 0x7b:key=13;break;
  61   4                                      case 0x7d:key=14;break;
  62   4                                      case 0x7e:key=15;break;
  63   4                                      default:break;
  64   4                                      }
  65   3                              while(P2&0x0f!=0x0f)
  66   3                              {;}
  67   3      
  68   3                              if (key!=0xff) ;
  69   3                      
  70   3                              }
  71   2              }
  72   1              return key;
  73   1      }
  74          
  75          void KeyProcess()
  76          {uchar key=0xff;
  77   1      key=GetKey();
  78   1      
  79   1      if(P1==0x8f&&k==1)
  80   1      
  81   1      {P0_0=0;
  82   2      P3_7=0;
  83   2      delaynms(3000);
  84   2      }
  85   1       else if(P1==0x4f&&P0_5==0)
  86   1      {P3_7=0;
  87   2      P0_1=0;
  88   2      delaynms(3000);
  89   2      }
  90   1      else if(P1==0x2f&&P0_6==0)
  91   1      {P3_7=0;
  92   2      P0_2=0;
  93   2      delaynms(3000);
  94   2      }
  95   1      else if(P1==0x1f&&P0_7==0)
  96   1      {P3_7=0;
  97   2      P0_3=0;
  98   2      delaynms(3000);
  99   2      }
 100   1      
 101   1      else if(key==0)
 102   1      {k++;
 103   2      if(k==1)P0_4=0;
 104   2      
 105   2      else if(k==2)P0_4=1;
 106   2      else    if (k>2)k=0;
 107   2      }
 108   1      else if(key==1)P0_1=~P0_1;
 109   1      else if(key==2)P0_2=~P0_2;
 110   1      else if(key==3)P0_3=~P0_3;
 111   1      else if(key==4)P0_4=~P0_4;
 112   1      else if(key==5)P0_5=~P0_5;
 113   1      else if(key==6)P0_6=~P0_6;
 114   1      else if(key==7)P0_7=~P0_7;
 115   1      else if(key==8){P0_0=~P0_0;P0_1=~P0_1;}
 116   1      else if(key==9){P0_1=~P0_1;P0_2=~P0_2;}
 117   1      else if(key==10){P0_2=~P0_2;P0_3=~P0_3;}
C51 COMPILER V8.02   KEYSCAN                                                               12/08/2008 23:21:50 PAGE 3   

 118   1      else if(key==11){P0_3=~P0_3;P0_4=~P0_4;}
 119   1      else if(key==12){P0_4=~P0_4;P0_5=~P0_5;}
 120   1      else if(key==13){P0_5=~P0_5;P0_6=~P0_6;}
 121   1      else if(key==14){P0_6=~P0_6;P0_7=~P0_7;}
 122   1      else if(key==15)P0=~P0;
 123   1      }
 124          
 125          /////////////////////////
 126          main()
 127          {
 128   1       while(1)
 129   1      KeyProcess();
 130   1       }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    436    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      1       2
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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