main.lst

基于AT89C51系列单片机的按键识别的C51程序之按键识别

C51 COMPILER V7.50   MAIN                                                                  09/02/2006 14:54:13 PAGE 1   


C51 COMPILER V7.50, COMPILATION OF MODULE MAIN
OBJECT MODULE PLACED IN main.OBJ
COMPILER INVOKED BY: D:\Program Files\Keil\C51\BIN\C51.EXE main.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include <reg52.h>
   2          
   3          sbit BY1=P2^1;       //定义按键的输入端
   4          unsigned char count; //按键计数,每按一下,count加1
   5          unsigned char temp; 
   6          unsigned char a,b; 
   7          
   8          void delay10ms(void) //延时程序
   9          { 
  10   1              unsigned char i,j; 
  11   1              for(i=20;i>0;i--) 
  12   1              for(j=248;j>0;j--); 
  13   1      } 
  14          key()           //按键判断程序
  15          { 
  16   1              if(BY1==0)  //判断是否按下键盘
  17   1              { 
  18   2                delay10ms(); //延时,软件去干扰
  19   2                if(BY1==0)   //确认按键按下
  20   2                 { 
  21   3                 count++;     //按键计数加1
  22   3                 if(count==8) //计8次重新计数
  23   3                 {
  24   4              count=0;    //将count清零
  25   4                 }
  26   3               }
  27   2              while(BY1==0);//按键锁定,每按一次count只加1.
  28   2              } 
  29   1      } 
  30           move()         //广告灯向左移动移动函数
  31          {
  32   1              a=temp<<count; 
  33   1              b=temp>>(8-count); 
  34   1              P3=a|b;  
  35   1      }
  36          
  37          main()
  38          {
  39   1       count=0;  //初始华参数设置
  40   1       temp=0xfe;
  41   1       P3=0xff;
  42   1       P3=temp; 
  43   1       while(1)  //永远循环,扫描判断按键是否按下
  44   1       {
  45   2         key();    //调用按键识别函数
  46   2         move();   //调用广告灯移动函数
  47   2       }
  48   1      }
  49          
  50           
  51          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     91    ----
C51 COMPILER V7.50   MAIN                                                                  09/02/2006 14:54:13 PAGE 2   

   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      4    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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