C51 COMPILER V7.20   WL005                                                                 03/29/2005 15:43:28 PAGE 1   


C51 COMPILER V7.20, COMPILATION OF MODULE WL005
OBJECT MODULE PLACED IN wl005.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE wl005.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          /*******************************************************************************
   2          *  標題:  偉納電子ME300B單片機開發系統演示程序 - 按鍵掃描程序                  *
   3          *  文件:  wl005.C                                                              *
   4          *  日期:  2004-1-5                                                             *
   5          *  版本:  1.0                                                                  *
   6          *  作者:  偉納電子 - Freeman                                                   *
   7          *  郵箱:  freeman@willar.com                                                   *
   8          *  網站： http://www.willar.com                                                *
   9          ********************************************************************************
  10          *  描述:                                                                       *
  11          *         按鍵掃描程序                                                         *
  12          *         上電時, 點亮P00口LED                                                 *
  13          *         按下K1時, LED向右移一位                                              *
  14          *         按下K2時, LED向左移一位                                              *
  15          *                                                                              *
  16          ********************************************************************************
  17          * 【版權】 Copyright(C)偉納電子 www.willar.com  All Rights Reserved            *
  18          * 【聲明】 此程序僅用于學習與參考，引用請注明版權和作者信息！                  *
  19          *******************************************************************************/
  20          
  21          #include <reg51.h>
  22          #include <intrins.h>
  23          
  24          unsigned char scan_key();
  25          void proc_key(unsigned char key_v);
  26          void delayms(unsigned char ms);
  27          
  28          sbit    K1 = P1^4;
  29          sbit    K2 = P1^5;
  30          
  31          main()
  32          {
  33   1              
  34   1              unsigned char key_s,key_v;
  35   1              key_v = 0x03;
  36   1              P0 = 0xfe;
  37   1              while(1)
  38   1              {
  39   2                      key_s = scan_key();
  40   2                      if(key_s != key_v)
  41   2                      {
  42   3                              delayms(10);
  43   3                              key_s = scan_key();
  44   3                              if(key_s != key_v)
  45   3                              {       
  46   4                                      key_v = key_s;
  47   4                                      proc_key(key_v);                                        
  48   4                              }
  49   3                      }
  50   2              }       
  51   1      }
  52          
  53          unsigned char scan_key()
  54          {
  55   1              unsigned char key_s;
C51 COMPILER V7.20   WL005                                                                 03/29/2005 15:43:28 PAGE 2   

  56   1              key_s = 0x00;
  57   1              key_s |= K2;
  58   1              key_s <<= 1;
  59   1              key_s |= K1;
  60   1              return key_s;           
  61   1      }
  62          
  63          void proc_key(unsigned char key_v)
  64          {
  65   1              if((key_v & 0x01) == 0)
  66   1              {
  67   2                      P0 = _cror_(P0,1);
  68   2              }
  69   1              else if((key_v & 0x02) == 0)
  70   1              {
  71   2                      P0 = _crol_(P0, 1);
  72   2              }
  73   1      }
  74          
  75          void delayms(unsigned char ms)  
  76          // 延時子程序
  77          {                                               
  78   1              unsigned char i;
  79   1              while(ms--)
  80   1              {
  81   2                      for(i = 0; i < 120; i++);
  82   2              }
  83   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    111    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----       2
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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