key.lst

52单片机开发板的实例程序

C51 COMPILER V7.20   KEY                                                                   09/03/2011 19:06:38 PAGE 1   


C51 COMPILER V7.20, COMPILATION OF MODULE KEY
OBJECT MODULE PLACED IN key.OBJ
COMPILER INVOKED BY: C:\keil\C51\BIN\C51.EXE key.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include<reg52.h>
   2          #define uint unsigned int
   3          #define uchar unsigned char 
   4          sbit a=P1^0;
   5          sbit b=P1^1;
   6          sbit c=P1^2;
   7          const uchar table[]={
   8                    0x3f,0x06,0x5b,0x4f,0x66,
   9                    0x6d,0x7d,0x07,0x7f,0x6f};
  10          void delay(uint k)
  11          {
  12   1        uint i;
  13   1        for(;k>0;k--)
  14   1        for(i=110;i>0;i--);
  15   1      }
  16          void HC138(uchar i)
  17          {
  18   1        a=i&0x01;
  19   1        b=i&0x02;
  20   1        c=i&0x04;
  21   1      }
  22          void display(uchar num)
  23          {
  24   1         uchar ge,shi;
  25   1         shi=num/10;
  26   1         ge=num%10;
  27   1         HC138(0);
  28   1         P2=table[ge];
  29   1         delay(3);
  30   1         HC138(1);
  31   1         P2=table[shi];
  32   1         delay(3);   
  33   1      }
  34          uchar keyscan()
  35          {
  36   1          uchar num,temp;
  37   1              P0=0xfe;
  38   1              temp=P0;
  39   1              temp=temp&0xf0;
  40   1              if(temp!=0xf0)
  41   1                      {
  42   2                              delay(5);
  43   2                              temp=P0;
  44   2                              temp=temp&0xf0;
  45   2                              while(temp!=0xf0)
  46   2                                      {
  47   3                                              temp=P0;
  48   3                                              switch(temp)
  49   3                                              {
  50   4                                                      case 0xee:num=0;break;
  51   4                                                      case 0xde:num=1;break;
  52   4                                                      case 0xbe:num=2;break;
  53   4                                                      case 0x7e:num=3;break;
  54   4                                              }
  55   3                                              while(P0!=0xf0)
C51 COMPILER V7.20   KEY                                                                   09/03/2011 19:06:38 PAGE 2   

  56   3                                                      P0&=0xf0;                               
  57   3                                      }
  58   2                      }
  59   1              P0=0xfd;
  60   1              temp=P0;
  61   1              temp=temp&0xf0;
  62   1              if(temp!=0xf0)
  63   1                      {
  64   2                              delay(5);
  65   2                              temp=P0;
  66   2                              temp=temp&0xf0;
  67   2                              while(temp!=0xf0)
  68   2                                      {
  69   3                                              temp=P0;
  70   3                                              switch(temp)
  71   3                                              {
  72   4                                                      case 0xed:num=4;break;
  73   4                                                      case 0xdd:num=5;break;
  74   4                                                      case 0xbd:num=6;break;
  75   4                                                      case 0x7d:num=7;break;
  76   4                                              }
  77   3                                              while(P0!=0xf0)
  78   3                                                      P0&=0xf0;                               
  79   3                                      }
  80   2                      }
  81   1              P0=0xfb;
  82   1              temp=P0;
  83   1              temp=temp&0xf0;
  84   1              if(temp!=0xf0)
  85   1                      {
  86   2                              delay(5);
  87   2                              temp=P0;
  88   2                              temp=temp&0xf0;
  89   2                              while(temp!=0xf0)
  90   2                                      {
  91   3                                              temp=P0;
  92   3                                              switch(temp)
  93   3                                              {
  94   4                                                      case 0xeb:num=8;break;
  95   4                                                      case 0xdb:num=9;break;
  96   4                                                      case 0xbb:num=10;break;
  97   4                                                      case 0x7b:num=11;break;
  98   4                                              }
  99   3                                              while(P0!=0xf0)
 100   3                                                      P0&=0xf0;                               
 101   3                                      }
 102   2                      }
 103   1              P0=0xf7;
 104   1              temp=P0;
 105   1              temp=temp&0xf0;
 106   1              if(temp!=0xf0)
 107   1                      {
 108   2                              delay(5);
 109   2                              temp=P0;
 110   2                              temp=temp&0xf0;
 111   2                              while(temp!=0xf0)
 112   2                                      {
 113   3                                              temp=P0;
 114   3                                              switch(temp)
 115   3                                              {
 116   4                                                      case 0xe7:num=12;break;
 117   4                                                      case 0xd7:num=13;break;
C51 COMPILER V7.20   KEY                                                                   09/03/2011 19:06:38 PAGE 3   

 118   4                                                      case 0xb7:num=14;break;
 119   4                                                      case 0x77:num=15;break;
 120   4                                              }
 121   3                                              while(P0!=0xf0)                         
 122   3                              P0&=0xf0;
 123   3                                      }
 124   2                      }
 125   1      return num;
 126   1      }
 127          void main()
 128          {
 129   1         uchar key=0;
 130   1         while(1)
 131   1         { 
 132   2          key=keyscan();
 133   2          display(key);
 134   2         }
 135   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    434    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =     10       2
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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