keyc.lst

郑州远博公司生产的单片机B型实验板电路原理图及配套源程序代码

C51 COMPILER V7.20   KEYC                                                                  04/01/2005 12:19:34 PAGE 1   


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

line level    source

   1          
   2          /***************************************************************
   3          按键扫描子程序
   4          作者：郑州远博科技  王兴民
   5          0371-66949037 0371-67256036  13949105551
   6          ****************************************************************/
   7          #include <config.h>
   8          #define KEYDATA   P2_0   //按键公共端接口
   9          
  10          Uchar Key_s(void)        {
  11   1              Uchar buffer,key_bit,i;
  12   1              Dsenddata(0x00);
  13   1              if(KEYDATA) return(0xff);
  14   1              if(!KEYDATA)
  15   1                  {
  16   2                    buffer=0xff;
  17   2                    Delayms(2);
  18   2                    key_bit=0xfe;
  19   2                    for(i=0;i<8;i++)
  20   2                      {
  21   3                        Dsenddata(key_bit);
  22   3                        if(!KEYDATA)
  23   3                           {
  24   4                            buffer=key_bit;
  25   4                            return(buffer);
  26   4                                                break;
  27   4                           }
  28   3                        key_bit=_crol_(key_bit,1);
  29   3                      }
  30   2                  }
  31   1                                  }          
  32                              
  33          
  34          
  35          
  36          
  37          
  38          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     67    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----       3
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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