C51 COMPILER V8.08   矩誣鍵盤C編程                                                         08/17/2008 17:54:40 PAGE 1   


C51 COMPILER V8.08, COMPILATION OF MODULE 矩誣鍵盤C編程
OBJECT MODULE PLACED IN 矩陣鍵盤C編程.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE 矩陣鍵盤C編程.C BROWSE DEBUG OBJECTEXTEND

line level    source

   1          /*****************************************************************************           
   2                         4*4行列式鍵盤的C程序編寫 
   3                                       
   4          *****************************************************************************/
   5          #include<reg51.h>
   6          #include<absacc.h>
   7          #include<intrins.h>
   8          #define uchar unsigned char
   9          #define uint unsigned int
  10          
  11          uchar code Tab[16]={       
  12                  0xC0,/*0*/
  13                  0xF9,/*1*/
  14                  0xA4,/*2*/
  15                  0xB0,/*3*/
  16                  0x99,/*4*/
  17                  0x92,/*5*/
  18                  0x82,/*6*/
  19                  0xF8,/*7*/
  20                  0x80,/*8*/
  21                  0x90,/*9*/
  22                  0x88,/*A*/
  23                  0x83,/*b*/
  24                  0xC6,/*C*/
  25                  0xA1,/*d*/
  26                  0x86,/*E*/
  27                  0x8E,/*F*/
  28          };
  29          uchar idata      com1,com2;
  30          
  31          void delay(void)
  32          {
  33   1         char a,b;
  34   1         for(a=20;a>0;a--)
  35   1         for(b=248;b>0;b--);
  36   1      
  37   1      }
  38          
  39          key_scan()
  40          {  
  41   1           uchar i;
  42   1               uchar com;
  43   1               com1=0x00;
  44   1               com2=0x00;
  45   1           delay();                      //消除鍵盤抖動  延時10ms 
  46   1           P2=0xf0;
  47   1           if(P2!=0xf0)
  48   1               {
  49   2              com1=P2;
  50   2              P2=0x0f;
  51   2              com2=P2;        
  52   2            }
  53   1                P2=0xf0;
  54   1                while(P2!=0xf0);        
  55   1                com=com1|com2;
C51 COMPILER V8.08   矩誣鍵盤C編程                                                         08/17/2008 17:54:40 PAGE 2   

  56   1                if(com==0xee)i=0;
  57   1                if(com==0xed)i=1;
  58   1                if(com==0xeb)i=2;
  59   1                if(com==0xe7)i=3;
  60   1                if(com==0xde)i=4;
  61   1                if(com==0xdd)i=5;
  62   1                if(com==0xdb)i=6;
  63   1                if(com==0xd7)i=7;
  64   1                if(com==0xbe)i=8;
  65   1                if(com==0xbd)i=9;
  66   1                if(com==0xbb)i=10;
  67   1                if(com==0xb7)i=11;
  68   1                if(com==0x7e)i=12;
  69   1                if(com==0x7d)i=13;
  70   1                if(com==0x7b)i=14;
  71   1                if(com==0x77)i=15;
  72   1                return(i);
  73   1      }
  74          
  75          void main()
  76          {
  77   1         uchar dat;
  78   1         while(1){
  79   2         P2=0xf0;
  80   2         while(P2!=0xf0){
  81   3         dat=key_scan();
  82   3         P0=Tab[dat];}}
  83   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    166    ----
   CONSTANT SIZE    =     16    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----    ----
   IDATA SIZE       =      2    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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