key.lst

应用电子密码锁

C51 COMPILER V7.50   KEY                                                                   05/03/2009 21:32:10 PAGE 1   


C51 COMPILER V7.50, 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 <reg51.h>
   2          #include <intrins.h>
   3          
   4          #define uchar unsigned char
   5          #define uint unsigned int
   6          
   7          void delayms(void);
   8          
   9           
  10          uchar kbscan(void)
  11          {
  12   1              unsigned char sccode,recode;
  13   1              P2=0x0f;  //发0扫描,列线输入
  14   1              if ((P2 & 0x0f) != 0x0f)  //有键按下
  15   1              {
  16   2                      delayms();   //延时去抖动
  17   2                      if ((P2&0x0f)!= 0x0f)
  18   2                      {
  19   3                              sccode = 0xef;    //逐行扫描初值
  20   3                              while((sccode&0x01)!=0)
  21   3                              {
  22   4                                  P2=sccode;
  23   4                                      if((P2&0x0f)!=0x0f)
  24   4                                      {
  25   5                                          recode=(P2&0x0f)|0xf0;
  26   5                                              while((P2&0x0f)!=0x0f);//松开按键返回键值
  27   5                                              return((~sccode)+(~recode));
  28   5                                       }
  29   4                              else
  30   4                                      sccode=(sccode<<1)|0x01;
  31   4                              }
  32   3                      }
  33   2              }
  34   1              return 0;  //无键按下，返回0
  35   1      }
  36          
  37          
  38          void delayms(void)
  39          {
  40   1          unsigned char k,y;
  41   1              for (k=200; k>0; k--)
  42   1              for (y=50;y>0;y--);
  43   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     81    ----
   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)