99.lst

用AT89C51制作的99秒跑马表

C51 COMPILER V7.08   99                                                                    03/07/2009 16:53:06 PAGE 1   


C51 COMPILER V7.08, COMPILATION OF MODULE 99
OBJECT MODULE PLACED IN 99.OBJ
COMPILER INVOKED BY: f:\Keil\C51\BIN\C51.EXE 99.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include <reg51.h> 
   2          
   3          unsigned char code dis_code[10]={0x40,0x79,0x24,0x30,0x19,0x12,0x02,0x78,0x00,0x10}; // 5,6,7,8,9,off 
   4          unsigned char code DATA[]={0,1,2,3,4,5,6,7,8,9}; //要显示的数字 
   5          unsigned char disp_temp,i,j; //要显示的位变量 
   6          //unsigned char data dis_buf[8]; // dis_buf 显于缓冲区基地址 
   7          unsigned char code BIT_TAB[]={0x01,0x02};
   8          //unsigned char data dis_index; // 显示索引, 用于标识当前显示的数码管和缓冲区的偏移量 
   9          
  10          void main() 
  11          { TMOD = 0x01; // 00000001B 定时计数器0工作在方式1，16位定时器/计数器 
  12   1      TH0 = 0xfc; 
  13   1      TL0 = 0xfc; // 预置初值 FC17H=64535D, 216-64535=1001us=1ms 
  14   1      IE = 0x82; // 10000010B T0溢出中断允许   
  15   1      TR0 = 1; // 启动T0 
  16   1      while(1); // 循环等待中断 
  17   1      } 
  18          
  19          void timer0() interrupt 1 // 定时器0中断服务程序, 用于数码管的动态扫描 
  20          
  21          { 
  22   1      TH0 = 0xfc; 
  23   1      TL0 = 0xfc; // 感觉此处(及上)应该是0x18,而不是17，分析如下 
  24   1      
  25   1      //P2 = 0x00; // 先关闭所有数码管 
  26   1      for(disp_temp=0;;disp_temp++) 
  27   1      { 
  28   2      P2=dis_code[DATA[disp_temp]];//P2为段码扫描，
  29   2      P1=BIT_TAB[disp_temp]; //P1.0--P1.1为片选
  30   2      if(disp_temp==9) 
  31   2      disp_temp=0; 
  32   2      }
  33   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     65    ----
   CONSTANT SIZE    =     22    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      3    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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