5.lst

用c51的键盘扫描

C51 COMPILER V7.09   5                                                                     08/09/2005 11:05:30 PAGE 1   


C51 COMPILER V7.09, COMPILATION OF MODULE 5
OBJECT MODULE PLACED IN 5.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE 5.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include "reg51.h"
   2          #define uchar unsigned char
   3          #define uint unsigned int
   4          void d1ms(void);
   5          uchar kbscan(void); 
   6          
   7          void main(void)
   8          {
   9   1      uchar key;
  10   1      while(1)
  11   1      {
  12   2      key=kbscan();
  13   2      d1ms();
  14   2      }
  15   1      }
  16          
  17          void d1ms(void)
  18          {
  19   1      uchar i;
  20   1      for(i=200;i>0;i--) {}
  21   1      }
  22          
  23          uchar kbscan(void)
  24          {
  25   1      uchar sccode,recode;
  26   1      P1=0xf0;
  27   1      if((P1&0xf0)!=0xf0)
  28   1      {
  29   2        d1ms();
  30   2        if((P1&0xf0)!=0xf0)
  31   2         {
  32   3          sccode=0xfe;
  33   3          while((sccode&0x10)!=0)
  34   3          {
  35   4           P1=sccode;
  36   4           if((P1&0xf0)!=0xf0)
  37   4            {
  38   5             recode=(P1&0xf0)|0x0f;
  39   5             return((~sccode)+(~recode));
  40   5            }
  41   4           else sccode=(sccode<<1)|0x01;
  42   4          }
  43   3         }
  44   2        }
  45   1      return(0);
  46   1      }
  47          
  48                   


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     77    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
C51 COMPILER V7.09   5                                                                     08/09/2005 11:05:30 PAGE 2   

   DATA SIZE        =   ----       1
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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