miao_biao.lst

这是一个跑表

C51 COMPILER V7.50   MIAO_BIAO                                                             04/04/2007 09:36:54 PAGE 1   


C51 COMPILER V7.50, COMPILATION OF MODULE MIAO_BIAO
OBJECT MODULE PLACED IN miao_biao.OBJ
COMPILER INVOKED BY: D:\software\Keil\C51\BIN\C51.EXE miao_biao.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          //**************************************************
   2          //程序功能：秒表，9.9秒表设计
   3          //*************************************************
   4          
   5          
   6          #include<REG52.h>
   7          
   8          code unsigned char seg7code[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,
   9                                         0x82,0xf8,0x80,0x90,0xff}; //共阳数码管段码
  10          
  11          unsigned int cnt=0;          //由于底下的cnt用到了4000，所以这时不能定义成char类型（最大才255）
  12          unsigned char sec=0;         //秒钟
  13          unsigned char min=0;         //分钟
  14          unsigned char hour=0;        //小时
  15          
  16          
  17          void delay1ms()          //1毫秒延时子程序
  18          {
  19   1       unsigned char i;
  20   1       for(i=124;i>0;i--);  //延时124*8+10=1002us
  21   1      }
  22          
  23          
  24          void LED_display()       //显示子程序
  25          {
  26   1      
  27   1               P2=0xfb;                   //P1.2=0,选通第三位
  28   1               P0=seg7code[sec/10];       
  29   1               delay1ms();
  30   1               P0=0xff;                   //消隐
  31   1      
  32   1               P2=0xf7;                   //P1.3=0,选通第四位
  33   1               P0=seg7code[sec%10];      
  34   1               delay1ms();
  35   1               P0=0xff;                  //消隐
  36   1      }
  37          
  38          
  39          void timer0 (void) interrupt 1 using 0   //定时器T0
  40          {
  41   1       cnt++;             //每过250us，cnt加一
  42   1       if(cnt==400)      //250*400=0.1s
  43   1       {
  44   2        cnt=0;
  45   2        sec++;           
  46   2        if(sec==100)       //定时10秒，重新开始
  47   2        {sec=0;}
  48   2      
  49   2        }
  50   1      }
  51          
  52          
  53          main()
  54          {
  55   1               TMOD=0x02;          //T0，方式2
C51 COMPILER V7.50   MIAO_BIAO                                                             04/04/2007 09:36:54 PAGE 2   

  56   1              
  57   1           EA=1;                 //开总中断
  58   1               ET0=1;               //开定时器T0中断
  59   1      
  60   1               TH0=0x19;          //11.0529MHZ的晶振，250us的定时中断
  61   1               TL0=0x19;
  62   1               TR0=1;
  63   1      
  64   1        while(1)
  65   1       {
  66   2        LED_display();
  67   2       }
  68   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    108    ----
   CONSTANT SIZE    =     11    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      5    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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