mian.lst

4*4键盘设计源程序

C51 COMPILER V7.06   MIAN                                                                  10/18/2006 08:59:26 PAGE 1   


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

stmt level    source

   1          /************************************************************************************
   2          六.4X4键盘识别
   3            DPY工作室
   4          ************************************************************************************/
   5          #include <reg52.h>
   6          unsigned char code seg7code[]={0x3f,0x06,0x5b,0x4f, 0x66,0x6d,0x7d,0x07, 
   7                                        0x7f,0x6f,0x77,0x7c, 0x39,0x5e,0x79,0x71}; 
   8          unsigned char k;
   9          void delay10ms(void) //延时程序
  10          { 
  11   1              unsigned char i,j; 
  12   1              for(i=20;i>0;i--) 
  13   1              for(j=248;j>0;j--); 
  14   1      } 
  15          void Getch (  )
  16          {   
  17   1              unsigned char X,Y,Z;
  18   1              P2=0xff;
  19   1              P2=0x0f;       //先对P3置数  行扫描
  20   1              if(P2!=0x0f)     //判断是否有键按下
  21   1              {
  22   2                      delay10ms();    //延时,软件去干扰
  23   2                      if(P2!=0x0f)   //确认按键按下X = P3;
  24   2                      {
  25   3                              X=P2;          //保存行扫描时有键按下时状态
  26   3                              P2=0xf0;       //列扫描
  27   3                              Y=P2;          //保存列扫描时有键按下时状态
  28   3                              Z=X|Y;         //取出键值
  29   3                              switch ( Z )   //判断键值（那一个键按下）
  30   3                              {
  31   4                                      case 0x77: k=0; break; //对键值赋值
  32   4                                      case 0x7b: k=1; break; 
  33   4                                      case 0x7d: k=2; break; 
  34   4                                      case 0x7e: k=3; break; 
  35   4                                      case 0xb7: k=4; break; 
  36   4                                      case 0xbb: k=5; break; 
  37   4                                      case 0xbd: k=6; break; 
  38   4                                      case 0xbe: k=7; break; 
  39   4                                      case 0xd7: k=8; break; 
  40   4                                      case 0xdb: k=9; break;  
  41   4                                      case 0xdd: k=10;break; 
  42   4                                      case 0xde: k=11;break; 
  43   4                                      case 0xe7: k=12;break; 
  44   4                                      case 0xeb: k=13;break; 
  45   4                                      case 0xed: k=14;break; 
  46   4                                      case 0xee: k=15;break; 
  47   4                           }     
  48   3                    }   
  49   2              }     
  50   1      } 
  51          void main(void)
  52          { 
  53   1        while(1)
  54   1       { P2=0xff;
  55   2         Getch();
C51 COMPILER V7.06   MIAN                                                                  10/18/2006 08:59:26 PAGE 2   

  56   2         P0=seg7code[k];  //查表LED输出
  57   2         P1=0xf0;         //输出相同的四位数据。
  58   2        }
  59   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    183    ----
   CONSTANT SIZE    =     16    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      1    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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