C51 COMPILER V7.10   KEY_LED                                                               12/23/2006 23:20:55 PAGE 1   


C51 COMPILER V7.10, COMPILATION OF MODULE KEY_LED
OBJECT MODULE PLACED IN .\key_led.obj
COMPILER INVOKED BY: D:\Program Files\keil\C51\BIN\C51.EXE ..\0123\key_led.c BROWSE DEBUG OBJECTEXTEND PRINT(.\key_led.l
                    -st) OBJECT(.\key_led.obj)

line level    source

   1          #include<reg51.h>
   2          #define uchar unsigned char 
   3          uchar k;
   4          uchar keyscan();
   5          void delay();
   6                  
   7          uchar code p[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
   8          uchar code wei[]={0xC0,0xf9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x98};
   9          uchar code first[]={0,0,0,0,0,0,0,1};
  10          uchar code second[]={0,0,0,0,4,0,0,0};
  11          uchar code third[]={0,0,0,0,8,0,0,0};
  12          uchar code fourth[]={0,0,0,1,2,0,0,0};
  13          
  14          void main()
  15          {       uchar i,j;
  16   1              while(1)
  17   1              {       if(keyscan()!=0)
  18   2                      k=keyscan();
  19   2                      for(i=0;i<8;i++)
  20   2                      {       P0=p[i];
  21   3                              j=7-i;
  22   3                              if(k==17) { P1=wei[first[j]];    }
  23   3                              if(k==18) {     P1=wei[second[j]];       }
  24   3                              if(k==20) { P1=wei[third[j]];    }
  25   3                              if(k==24) { P1=wei[fourth[j]];   }
  26   3                              delay();
  27   3                      }
  28   2              }
  29   1      }
  30          void delay()                                                
  31          {       uchar i;
  32   1              for(i=50000;i>0;i++);
  33   1      }
  34          uchar keyscan(void)
  35          {       
  36   1              uchar code_h;
  37   1              uchar code_l;
  38   1              P2=0xF0;
  39   1              if((P2&0xF0)!=0xF0)
  40   1              {       delay();
  41   2                      if((P2&0xF0)!=0xF0)
  42   2                      {       code_h=0xFE;
  43   3                              while((code_h&0x10)!=0xF0)
  44   3                              { P2=code_h;
  45   4                              if((P2&0xF0)!=0xF0)
  46   4                              {code_l=(P2&0xF0|0x0F);
  47   5                               return((~code_h)+(~code_l));
  48   5                              }
  49   4                              else code_h=(code_h<<1)|0x01;
  50   4                          }
  51   3                      }
  52   2              }
  53   1              return(0);
  54   1      }
C51 COMPILER V7.10   KEY_LED                                                               12/23/2006 23:20:55 PAGE 2   



MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    178    ----
   CONSTANT SIZE    =     50    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      1       1
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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