key_test.lst

单片机实现按键的功能程序

C51 COMPILER V8.02   KEY_TEST                                                              04/28/2008 22:01:34 PAGE 1   


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

line level    source

   1          #include<reg51.h>
   2          #include"key_test.h"
   3          
   4          void delay()
   5          {       uchar i,j;
   6   1              for(i=0;i<50;i++)
   7   1              for(j=0;j<255;j++);
   8   1      }
   9          char keypad_scan()
  10          {
  11   1              char key,i;
  12   1              keyout=0xf0;
  13   1              while(keyout!=0xf0);
  14   1              do{
  15   2                      for(i=0;i<=3;i++)
  16   2                      {
  17   3                              keyout=ksp[i];
  18   3                              if(keyout!=ksp[i])
  19   3                              {
  20   4                                      delay();
  21   4                                      key=keyout;
  22   4                                      if(key!=ksp[i]) 
  23   4                                              return(key);
  24   4                              }               
  25   3                      }
  26   2              }while(1);
  27   1      }
  28          char gotkey()
  29          {
  30   1              char temp,i;
  31   1              temp=keypad_scan();
  32   1              for(i=0;i<=15;i++)
  33   1              {
  34   2                      if(temp==key_code[i])   return(i);
  35   2              }
  36   1               return(16);    
  37   1      } 
  38          
  39          void main()
  40          {       
  41   1      while(1)
  42   1      {
  43   2              P2=0xaa;
  44   2              delay();
  45   2              P2=0x55;
  46   2       }
  47   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    165    ----
   CONSTANT SIZE    =     24    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----    ----
C51 COMPILER V8.02   KEY_TEST                                                              04/28/2008 22:01:34 PAGE 2   

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


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