test.lst

单片机学习例子（按键中断） 适合初学者使用

C51 COMPILER V7.09   TEST                                                                  04/15/2007 19:02:16 PAGE 1   


C51 COMPILER V7.09, COMPILATION OF MODULE TEST
OBJECT MODULE PLACED IN test.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE test.c BROWSE DEFINE(evalboard) DEBUG OBJECTEXTEND

line level    source

   1          /************************* *********** 程序功能 ********************************************
   2                              由按键产生，对中断次数从0到9进行计数，同时在数码管上显示
   3          ********************************************************************************************/
   4          #include<reg52.h>
   5          sbit s1 = P2^0;
   6          sbit s2 = P2^1;
   7          sbit s3 = P2^2;
   8          sbit s4 = P2^3;
   9          sbit en = P2^5;
  10          sbit lcd_e=P2^7;
  11          
  12          int dispcount = 0;
  13          
  14          void Delay(int m)
  15          {
  16   1              while(--m);
  17   1      }
  18          
  19          void ext_int0() interrupt 0    //中断服务程序
  20          {  
  21   1              EA = 0;
  22   1              Delay(4000);
  23   1              dispcount++;              //每按一次中断按键，计数加一
  24   1          if(dispcount==10)     
  25   1                      dispcount=0;
  26   1              EA = 1;
  27   1      }
  28          
  29          void display(void)            //数码管显示函数
  30          {
  31   1              s1 = 0;
  32   1              s2 = 0;
  33   1              s3 = 0;
  34   1              s4 = 0;
  35   1              en = 1;
  36   1              switch(dispcount)
  37   1              {                                                       
  38   2                      case 0:
  39   2                              P0 = 0xC0;                       //display  0        
  40   2                              break;
  41   2                      case 1:
  42   2                              P0 = 0xF9;               //display  1
  43   2                              break;
  44   2                      case 2: 
  45   2                              P0 = 0xA4;      
  46   2                              Delay(60000);            //display  2
  47   2                              break;
  48   2                      case 3:
  49   2                              P0 = 0xB0;               //display  3         
  50   2                              break;
  51   2                      case 4:
  52   2                              P0 = 0x99;              //display  4
  53   2                              break;
  54   2                      case 5:
  55   2                              P0 = 0x92;          //display  5
C51 COMPILER V7.09   TEST                                                                  04/15/2007 19:02:16 PAGE 2   

  56   2                              break;
  57   2                      case 6:
  58   2                              P0 = 0x82;              //display  6
  59   2                              break;
  60   2                      case 7:
  61   2                              P0 = 0xF8;                      //display  7
  62   2                              break;
  63   2                      case 8:
  64   2                              P0 = 0x80;         //display  8
  65   2                              break;
  66   2                      case 9:
  67   2                              P0 = 0x90;         //display  9
  68   2                              break;
  69   2                      default:
  70   2                              P0 = 0x88;         //display  a 
  71   2                              break;
  72   2              }
  73   1      }
  74          void main()
  75          {
  76   1              TCON=0x01;  //中断设置
  77   1              IE=0x81;
  78   1              lcd_e=0;
  79   1              while(1)   //循环执行
  80   1              {
  81   2              display();     //只须调用显示函数
  82   2          }
  83   1      }
  84          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    180    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      2    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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