ex4-5.lst

22个51单片机的实例

C51 COMPILER V8.05a   EX4_5                                                                10/02/2008 15:50:29 PAGE 1   


C51 COMPILER V8.05a, COMPILATION OF MODULE EX4_5
OBJECT MODULE PLACED IN ex4-5.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE ex4-5.c DEBUG OBJECTEXTEND

line level    source

   1          #include <reg51.h>
   2          #include <stdio.h>
   3          
   4          #define byte unsigned char
   5          
   6          //中断服务程序
   7          void keyinterrupt()   interrupt 2
   8          {
   9   1              int t;
  10   1              byte keycode,scancode,flag=0xff;
  11   1              t=5000;
  12   1              while(t--);
  13   1              if(INT1==1)
  14   1                      return;
  15   1              EX1=0;
  16   1              scancode=0xef;
  17   1              while(scancode!=0xff)
  18   1              {
  19   2                      P1=scancode;
  20   2                      keycode=P1;
  21   2                      if((keycode&0x0f)!=0x0f)
  22   2                              break;
  23   2                      scancode=(keycode<<1)|0x0f;
  24   2              }
  25   1              keycode=~keycode;
  26   1      
  27   1              P2=keycode; //将扫描码输出，数码管采用具有译码功能的数码管
  28   1              P1=0X0F;
  29   1              while(1)
  30   1              {
  31   2                      if(INT1==1)
  32   2                      {
  33   3                              flag=~flag;
  34   3                              if(flag==0)
  35   3                              break;
  36   3                      }
  37   2                      t=10000;
  38   2                      while(t--);
  39   2              }
  40   1              EX1=1;
  41   1              return;
  42   1      }
  43          
  44          void main(void)
  45          {    
  46   1              IE=0;
  47   1              EX1=1;
  48   1              EA=1;  //中断open
  49   1              P2=0XFF;
  50   1              P1=0X0F;
  51   1          while(1)
  52   1          {           
  53   2              }                  
  54   1      }

C51 COMPILER V8.05a   EX4_5                                                                10/02/2008 15:50:29 PAGE 2   


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    132    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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