clock.lst

自己初学C51时写的一个时钟小程序

C51 COMPILER V7.01  CLOCK                                                                  10/02/2005 22:30:29 PAGE 1   


C51 COMPILER V7.01, COMPILATION OF MODULE CLOCK
OBJECT MODULE PLACED IN clock.OBJ
COMPILER INVOKED BY: D:\Program Files\keil\C51\BIN\C51.EXE clock.c BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          #include<reg51.h>
   2          
   3          unsigned char code Table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
   4          
   5          unsigned char data Time[2];
   6          
   7          unsigned char digit,disp,delay;
   8          
   9          void timer(void) interrupt 1 using 1
  10          {
  11   1              TH0=-50000/256;
  12   1              TL0=-50000%256;
  13   1              Time[0]=Time[0]+1;
  14   1              if (Time[0]==100)
  15   1              {
  16   2                      Time[0]=0;
  17   2                      Time[1]=Time[1]+1;
  18   2                      if (Time[1]==60)
  19   2                              Time[1]=0;
  20   2              }
  21   1      }
  22          
  23          void display(void)
  24          {
  25   1      unsigned char i;
  26   1      digit=0x08;
  27   1      for(i=0;i<2;i++)
  28   1      {
  29   2              P0=digit;
  30   2              disp=Time[i]/10;
  31   2              P1=Table[disp];
  32   2              for(delay=0;delay<200;delay++);
  33   2              digit=digit>>1;
  34   2              P0=digit;
  35   2              disp=Time[i]%10;
  36   2              P1=Table[disp];
  37   2              for(delay=0;delay<200;delay++); 
  38   2              digit=digit>>1;
  39   2      }
  40   1      }
  41          void main()
  42          {
  43   1              Time[0]=0;
  44   1              Time[1]=0;
  45   1              TMOD=0x01;
  46   1              TH0=-50000/256;
  47   1              TL0=-50000%256;
  48   1              EA=1;
  49   1              ET0=1;
  50   1              TR0=1;
  51   1              while(1)
  52   1              {
  53   2                      switch (P2)
  54   2                      {
  55   3                              case 0xFF:
C51 COMPILER V7.01  CLOCK                                                                  10/02/2005 22:30:29 PAGE 2   

  56   3                                      TR0=1;
  57   3                                      display();
  58   3                                      break;
  59   3                              case 0xFE:
  60   3                                      TR0=0;
  61   3                                      display();
  62   3                                      break;
  63   3                      }
  64   2              }
  65   1      }
  66          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    163    ----
   CONSTANT SIZE    =     10    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      5    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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