key.lst

单片机实现密码锁功能！ 输入密码时显示：FFFFFF 输入错误时可按“取消键”重新输入 密码输入完毕按“确认键盘”

C51 COMPILER V6.12  KEY                                                                    04/20/2008 12:33:28 PAGE 1   


C51 COMPILER V6.12, COMPILATION OF MODULE KEY
OBJECT MODULE PLACED IN .\key.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE .\key.c BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          #include <AT89X51.H>
   2          code char key_code[]={0xee,0xde,0xbe,0x7e,0xed,0xdd,0xbd,0x7d,0xeb,0xdb,0xbb,0x7b,0xe7,0xd7,0xb7,0x77};
   3          code ksp[4]={0x7f,0xbf,0xdf,0xef};
   4          
   5          //键盘消抖动延时程序
   6          void delay(void)
   7          {
   8   1        unsigned char j;
   9   1      	  for(j=300;j>0;j--);
  10   1      }
  11          
  12          //检查是否有键按下
  13          char keypad_scan()
  14           {
  15   1         char key,i;
  16   1      	P1=0xf0;
  17   1      	while(P1!=0xf0);
  18   1      	 do{
  19   2      	     for(i=0;i<=3;i++)
  20   2      		  {
  21   3      		     P1=ksp[i];
  22   3      			  if(P1!=ksp[i])
  23   3      			    {
  24   4      				   delay();
  25   4      					key=P1;
  26   4      					if(key!=ksp[i])
  27   4      					  {
  28   5      				       return(key);	  
  29   5      					  }
  30   4      				 }
  31   3      		  }
  32   2      	   }while(1); 
  33   1       }
  34          
  35           //检查哪个按钮按下，返回键码
  36           char gotkey()
  37           {
  38   1         char temp ,i;
  39   1      	temp=keypad_scan();
  40   1      	for(i=0;i<=15;i++)
  41   1      	 {
  42   2      	   if(temp==key_code[i])
  43   2      		  return(i);
  44   2      	 }return(16);
  45   1       }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    147    ----
   CONSTANT SIZE    =     24    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
C51 COMPILER V6.12  KEY                                                                    04/20/2008 12:33:28 PAGE 2   

END OF MODULE INFORMATION.


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