wl005.lst

周立功的51单片机试验例程,我当年就是靠这个学会单片机的

C51 COMPILER V7.08   WL005                                                                 02/17/2004 12:02:16 PAGE 1   


C51 COMPILER V7.08, COMPILATION OF MODULE WL005
OBJECT MODULE PLACED IN wl005.OBJ
COMPILER INVOKED BY: d:\Keil\C51\BIN\C51.EXE wl005.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          /*******************************************************************************
   2          *                                                                              *
   3          *    File       : wl005.c                                                      *
   4          *    Date       : 2004-1-5                                                     *
   5          *    Version    : 1.0                                                          *
   6          *                                                                              *
   7          *    Author     : Freeman          [e-mail]                          *
   8          *    Company    : Willar           www.willar.com                              *
   9          *                                                                              *
  10          ********************************************************************************
  11          *    Description:                                                              *
  12          *                按键扫描程序                                                  *
  13          *                上电时, 点亮P00口LED                                          *
  14          *                按下AN1时, LED向右移一位                                      *
  15          *                按下AN2时, LED向左移一位                                      *
  16          *******************************************************************************/
  17          #include <reg51.h>
  18          #include <intrins.h>
  19          
  20          unsigned char scan_key();
  21          void proc_key(unsigned char key_v);
  22          void delayms(unsigned char ms);
  23          
  24          sbit    AN1 = P3^2;
  25          sbit    AN2 = P3^3;
  26          
  27          main()
  28          {
  29   1              
  30   1              unsigned char key_s,key_v;
  31   1              key_v = 0x03;
  32   1              P0 = 0xfe;
  33   1              while(1)
  34   1              {
  35   2                      key_s = scan_key();
  36   2                      if(key_s != key_v)
  37   2                      {
  38   3                              delayms(10);
  39   3                              key_s = scan_key();
  40   3                              if(key_s != key_v)
  41   3                              {       
  42   4                                      key_v = key_s;
  43   4                                      proc_key(key_v);                                        
  44   4                              }
  45   3                      }
  46   2              }       
  47   1      }
  48          
  49          unsigned char scan_key()
  50          {
  51   1              unsigned char key_s;
  52   1              key_s = 0x00;
  53   1              key_s |= AN2;
  54   1              key_s <<= 1;
  55   1              key_s |= AN1;
C51 COMPILER V7.08   WL005                                                                 02/17/2004 12:02:16 PAGE 2   

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