get_key.lst

单片机控制的步进电机 不是很完善 但是能实现基本功能

C51 COMPILER V7.06   GET_KEY                                                               03/24/2007 20:31:57 PAGE 1   


C51 COMPILER V7.06, COMPILATION OF MODULE GET_KEY
OBJECT MODULE PLACED IN Get_Key.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE Get_Key.c BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          #define uchar   unsigned char
   2          #define uint    unsigned int
   3          #include        <reg52.h>
   4          uchar GetKey(void)
   5                  {       uint    i=0;    
   6   1                      uchar   keybuf=0;
   7   1                      if(P1!=0xff)
   8   1                      {
   9   2                                      keybuf=P1;
  10   2                                      if(keybuf!=0xff)
  11   2                                      {
  12   3                                                      while((P1==keybuf)&&(i<0x6000)) i+=1;                   
  13   3                                              if(i>101)             
  14   3                                                      { return keybuf;}  
  15   3                                              else return 0;
  16   3                                              }
  17   2                                      else return     0;                                      
  18   2                      }               
  19   1              else    return 0;       
  20   1              }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     53    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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