led.lst

本例通过2 2矩阵键盘对矩阵键盘的原理说明

C51 COMPILER V7.09   LED                                                                   04/06/2009 21:51:01 PAGE 1   


C51 COMPILER V7.09, COMPILATION OF MODULE LED
OBJECT MODULE PLACED IN led.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE led.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include<reg51.h>
   2          #define uchar unsigned char
   3          #define uint unsigned int
   4          
   5          sbit P10=P1^0;
   6          sbit P11=P1^1;
   7          sbit P16=P1^6;
   8          sbit P17=P1^7;
   9          
  10          sbit P20=P2^0;
  11          sbit P21=P2^1;
  12          
  13          uchar count;
  14          
  15          uchar button(uchar temp)
  16          {   
  17   1         if(temp==3||temp==2)
  18   1           {  P10=0;P11=0;
  19   2                 if(P16==0&&P17==1)
  20   2                   return 2;
  21   2                 if(P16==1&&P17==0)
  22   2                   return 3;
  23   2               }
  24   1         if(temp==4||temp==1)
  25   1           {  P10=0;P11=1;
  26   2                  if(P16==0&&P17==0)
  27   2                        return 1;
  28   2                       if(P16==1&&P17==1)
  29   2                       return 4;
  30   2               }
  31   1              else 
  32   1               return 0;
  33   1          
  34   1      }
  35          
  36          
  37          
  38          
  39          
  40          void main()
  41          {
  42   1       
  43   1        TMOD=0x01;
  44   1        EA=1;
  45   1        ET0=1;
  46   1        TH0=(65536-50000)/256;
  47   1        TL0=(65536-50000)%256;
  48   1        TR0=1;
  49   1      
  50   1        while(1)
  51   1        {
  52   2            P20=1;
  53   2          P21=1;
  54   2              count=0;
  55   2          while(2==button(2))
C51 COMPILER V7.09   LED                                                                   04/06/2009 21:51:01 PAGE 2   

  56   2                {P20=0;P21=1;}
  57   2          while(1==button(1))
  58   2                { 
  59   3              if(count==20) {P20=!P20;count=0;}
  60   3                }
  61   2      
  62   2              while(3==button(3))
  63   2                {
  64   3                  if(count==40) {P21=!P21;count=0;}
  65   3                }
  66   2              
  67   2              
  68   2        }
  69   1      }
  70          
  71          void time_0() interrupt 1
  72          {
  73   1        TH0=(65536-50000)/256;
  74   1        TL0=(65536-50000)%256;
  75   1        count++;
  76   1      }
  77          
  78          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    152    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      1    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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