key.lst

At89s52单片机与max197的AD程序

C51 COMPILER V8.02   KEY                                                                   04/27/2007 16:19:32 PAGE 1   


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

line level    source

   1          #include "main.h"
   2          #include "reg52.h"
   3          
   4          
   5            
   6            void Delay()
   7            {
   8   1          unsigned char i;
   9   1          for(i=200;i>0;i--)
  10   1          {}
  11   1        }
  12          
  13            
  14          unsigned char Key_Scan()
  15           {
  16   1          unsigned char S_ccode,R_ecode;
  17   1          P3=0xf0;
  18   1          if((P3&0xf0)!=0xf0)
  19   1            {
  20   2              Delay();
  21   2              if((P3&0xf0)!=0xf0)
  22   2                {
  23   3                  S_ccode=0xfe;
  24   3                  while((S_ccode&0x10)!=0)
  25   3                         {
  26   4                        P3=S_ccode;
  27   4                        if((P3&0xf0)!=0xf0)
  28   4                           {
  29   5                             R_ecode=(P3&0xf0)|0x0f;
  30   5                             return((~S_ccode)+(~R_ecode));
  31   5                                }
  32   4                       else
  33   4                         S_ccode=(S_ccode<<1)|0x01;
  34   4                              }
  35   3                 }
  36   2             }
  37   1          return(0);
  38   1       }
  39          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     67    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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