main.lst

c51

C51 COMPILER V7.20   MAIN                                                                  01/14/2008 16:02:52 PAGE 1   


C51 COMPILER V7.20, COMPILATION OF MODULE MAIN
OBJECT MODULE PLACED IN main.OBJ
COMPILER INVOKED BY: F:\Program_Files\Keil\C51-Product\C51\BIN\C51.EXE main.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include <reg52.h>
   2          #include <kc51.h>
   3          
   4          //定时器中断方式的跑马灯
   5          bit gb_ldelay = 0;       //长定时溢出标记,预置是0
   6          
   7          
   8          void main(void)
   9          {
  10   1              uchar code ledp[4] = {0xfe,0xfd,0xfb,0xf7};//预定的写入P1的值
  11   1              uchar ledi;      //用来指示显示顺序
  12   1      
  13   1              RCAP2H = 0x10; //赋T2的预置值0x1000，溢出30次就是1秒钟
  14   1              RCAP2L = 0x00;
  15   1      
  16   1              EA = 1;     //打开总中断
  17   1              ET2 = 1;    //打开定时器2中断
  18   1              TR2 = 1;          //启动定时器
  19   1              
  20   1                      
  21   1              while(1)
  22   1              {               
  23   2                      if(gb_ldelay)   //发现有时间溢出标记，进入处理
  24   2                      {
  25   3                              gb_ldelay = 0;  //清除标记
  26   3                              P1=ledp[ledi];  //读出一个值送到P1口
  27   3                              ledi++;         //指向下一个
  28   3                              if(ledi==4)ledi=0;      //到了最后一个灯就换到第一个
  29   3                      }
  30   2              }
  31   1      }
  32          
  33          
  34          //定时器2中断
  35          timer2() interrupt 5  
  36          {
  37   1              static uchar t;
  38   1              TF2 = 0;
  39   1              t++;
  40   1      
  41   1              if(t==30) //T2的预置值0x1000，溢出30次就是1秒钟,晶振22118400HZ
  42   1              {
  43   2                      t = 0;
  44   2                      gb_ldelay = 1;//每次长时间的溢出，就置一个标记，以便主程序处理
  45   2              }
  46   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     60    ----
   CONSTANT SIZE    =      4    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      1       1
   IDATA SIZE       =   ----    ----
C51 COMPILER V7.20   MAIN                                                                  01/14/2008 16:02:52 PAGE 2   

   BIT SIZE         =      1    ----
END OF MODULE INFORMATION.


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