timer06.lst

这是用51单片机开发的电子时钟

C51 COMPILER V8.05a   TIMER06                                                              02/09/2009 08:18:26 PAGE 1   


C51 COMPILER V8.05a, COMPILATION OF MODULE TIMER06
OBJECT MODULE PLACED IN timer06.OBJ
COMPILER INVOKED BY: d:\Keil\C51\BIN\C51.EXE timer06.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          /*  
   2          *本程序能使数码管显示时钟               flag
   3          *不能用键盘进行调节
   4          *程序的写法是根据硬件电路的连接方式，数码管接在P0口上，前四位是位选，由74LS138驱动；后四位是段选，由74LS47
             -驱动；
   5          *程序的精华：74LS138一次只能选择一个数码管，故应ScanSeg7()循环扫描数码管使六个数码管全部亮起来；
   6          **************通过定时中断和write_sfm()将sec、min、hour写入DisplayArray[6]中，再通过ScanSeg7()是数码管显示
             -出时钟
   7          */
   8          #include <reg52.h>        
   9          #define  uchar unsigned char    
  10          #define  uint  unsigned int
  11          uchar hour=23;min=58;sec=12;
  12          uchar DisplayArray[6]={2,1,8,5,3,2};
  13          uchar count,s1num;
  14          sbit speaker=P3^3;
  15          void ScanSeg7()                             /*数码管扫描显示*/
  16          {
  17   1          static uchar s_scanCounter;
  18   1          s_scanCounter++;
  19   1          if(s_scanCounter>5) s_scanCounter=0;                    /*ptr1>5表示6个数码管都已经扫描过*/
  20   1          P0=s_scanCounter|(DisplayArray[s_scanCounter]<<4);
  21   1      } 
  22          
  23          void write_sfm(uchar add,uchar date)
  24          {
  25   1        uchar hour,ge;
  26   1        hour=date/10;
  27   1        ge=date%10;
  28   1        DisplayArray[add]=ge;
  29   1        DisplayArray[add+1]=hour;
  30   1      }
  31          void main()
  32          {
  33   1         TMOD=0x01;
  34   1         TR0=1;
  35   1         EA=1;
  36   1         ET0=1;
  37   1      
  38   1           while(1)
  39   1         {
  40   2      
  41   2           ScanSeg7() ;
  42   2               if(sec&min&hour==0)
  43   2               {
  44   3                 speaker=0;  
  45   3               }
  46   2               
  47   2         }
  48   1      }  
  49          void Timer0Int() interrupt 1
  50          {
  51   1               TH0=(65536-50000)/256; /*设定Timer0每隔SCAN_CYCLEu中断一次*/
  52   1           TL0=(65536-50000)%256;
  53   1           count++;
C51 COMPILER V8.05a   TIMER06                                                              02/09/2009 08:18:26 PAGE 2   

  54   1              if(count==20)
  55   1               {
  56   2                 count=0;
  57   2                 sec++;
  58   2                 if(sec==60)
  59   2                 {
  60   3                    sec=0;
  61   3                        min++;
  62   3                        if(min==60)
  63   3                        {
  64   4                          min=0;
  65   4                              hour++;
  66   4                              if(hour==24)
  67   4                              {
  68   5                              hour=0;
  69   5                              }
  70   4                              write_sfm(4,hour);
  71   4                        }
  72   3                        write_sfm(2,min);
  73   3                 }
  74   2                 write_sfm(0,sec);
  75   2               }
  76   1                      
  77   1      }   


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    212    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =     14    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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