查询式键盘设计.lst

基于Proteus的51系列单片机设计与仿真

C51 COMPILER V7.06   查裚式键盘设计                                                        05/12/2008 21:54:18 PAGE 1   


C51 COMPILER V7.06, COMPILATION OF MODULE 查裚式键盘设计
OBJECT MODULE PLACED IN 查询式键盘设计.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE 查询式键盘设计.c BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          /***********************************************************************
   2                                     查询式键盘设计
   3                                                数码管显示按键的值
   4          ************************************************************************/
   5          #include"reg51.h"
   6          #define uint unsigned int
   7          #define uchar unsigned char
   8          const uchar tab[]={0X3F,0X06,0X5B,0X4F,0X66,0X6D,0X7D,0X07,0X7F,0X6F,};/*0~9*/
   9          void delay(uint n)
  10          {   uint i;
  11   1               for(i=0;i<n;i++);              
  12   1      }
  13          void main(void)
  14          {   uchar key;
  15   1          P2=0x00;
  16   1          P3=0xff;
  17   1              while(1)
  18   1              {
  19   2                              while(P3==0xff);                //等待键按下
  20   2                              delay(2500);                     // 延时出去抖动
  21   2                      while(P3==0xff);
  22   2                              key=P3;                          //读取键值
  23   2                              switch(key)
  24   2                                      {       case 0xfe :   P2=tab[1]; break;
  25   3                                      case 0xfd :   P2=tab[2]; break;
  26   3                                              case 0xfb :       P2=tab[3]; break;
  27   3                                      case 0xf7 :   P2=tab[4]; break;
  28   3                                              case 0xef :   P2=tab[5]; break;
  29   3                                              case 0xdf :   P2=tab[6]; break;
  30   3                                              case 0xbf :   P2=tab[7]; break;
  31   3                                              case 0x7f :   P2=tab[8]; break;
  32   3                              } 
  33   2                }
  34   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    115    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =     10    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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