独立键盘2.lst

简单的关于独立键盘的程序

C51 COMPILER V8.08   独立键盘2                                                             09/15/2002 21:19:56 PAGE 1   


C51 COMPILER V8.08, COMPILATION OF MODULE 独立键盘2
OBJECT MODULE PLACED IN 独立键盘2.OBJ
COMPILER INVOKED BY: E:\keil\C51\BIN\C51.EXE 独立键盘2.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include<reg52.h>
   2          #define uint unsigned int
   3          #define uchar unsigned char
   4          /*sbit PD=PCON^1;       */
   5          sbit keyhx=P1^0;
   6          sbit d1=P0^1;
   7          
   8          uchar num;
   9          void delay(uint z)      
  10          {
  11   1              uint x,y;
  12   1              for(x=z;x>0;x--)
  13   1              for(y=110;y>0;y--);
  14   1      
  15   1      }
  16          void init()
  17          {       
  18   1              EA=1;
  19   1              EX0=1;
  20   1              IT0=1;
  21   1              TCON=0x01;
  22   1      }
  23          void exter0() interrupt 0
  24          {
  25   1         EA=0;
  26   1         d1=1;
  27   1         PCON&=0x02;
  28   1         EA=1;
  29   1      }
  30          void main()
  31          {   init();
  32   1              P3=0xff;  
  33   1              P1=0xff;
  34   1              while(1)
  35   1              {       
  36   2                      if(keyhx==0)
  37   2              {       
  38   3                      delay(10);
  39   3                              if(keyhx==0)
  40   3                                      {        
  41   4                                      d1=0;
  42   4                                              PCON|=0x02;
  43   4                                              
  44   4                                              num++;
  45   4                                              if(num==10)
  46   4                                                      {
  47   5                                                              num==0;
*** WARNING C275 IN LINE 47 OF 独立键盘2.C: expression with possibly no effect
  48   5                                                      }
  49   4                                      }
  50   3                              while(!keyhx);
  51   3                              delay(10);
  52   3                              while(!keyhx);
  53   3              }
  54   2      
C51 COMPILER V8.08   独立键盘2                                                             09/15/2002 21:19:56 PAGE 2   

  55   2              }
  56   1      
  57   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     94    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      1    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


C51 COMPILATION COMPLETE.  1 WARNING(S),  0 ERROR(S)