timer.lst

一个通过8051来控制8019上网的程序 该程序已经通过并成功用于键盘

C51 COMPILER V7.06   TIMER                                                                 03/06/2004 14:02:48 PAGE 1   


C51 COMPILER V7.06, COMPILATION OF MODULE TIMER
OBJECT MODULE PLACED IN Timer.OBJ
COMPILER INVOKED BY: d:\Keil\C51\BIN\C51.EXE Timer.c LARGE BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          //-----------------------------------------------------------------------------
   2          // Net TIMER.C
   3          //
   4          // This module sets up the timer and handles the timer interrupt
   5          //-----------------------------------------------------------------------------
   6          #include <reg52.h>
   7          #include "net.h"
   8          #include "timer.h"
   9          
  10          
  11          extern UINT volatile event_word;
  12          extern ULONG idata initial_sequence_nr;
  13          
  14          
  15          //--------------------------------------------------------------------------
  16          // Timer 2 interrupt service routing. Intr vector location is
  17          // address 0x002B. The timer generates an interrupt every 25 msec
  18          // It is set to auto reload so do not need to reload it.
  19          //--------------------------------------------------------------------------
  20          void timer1_interrupt(void) interrupt 3
  21          {
  22   1              static UINT count1 = 0;
  23   1              static UINT count2 = 0;
  24   1              
  25   1              TH1=0X4C;
  26   1              TL1=0;  
  27   1              // Advance the initial sequence number
  28   1              initial_sequence_nr += 6250;
  29   1         // Keep it some distance from rolling over
  30   1         if (initial_sequence_nr & 0x10000000L) initial_sequence_nr = 1;
  31   1              
  32   1              count1++;
  33   1              // These events happens every 0.50 seconds, not simultaneously
  34   1              if (count1 == 5) event_word |= EVENT_ARP_RETRANSMIT;
  35   1              
  36   1              if (count1 == 10) event_word |= EVENT_TCP_INACTIVITY;
  37   1              
  38   1              if (count1 == 15) event_word |= EVENT_READ_ANALOG;
  39   1              
  40   1              if (count1 == 20)
  41   1              {
  42   2                      count1 = 0;
  43   2                      event_word |= EVENT_TCP_RETRANSMIT;
  44   2              }
  45   1              
  46   1              count2++;
  47   1              if (count2 == 2401)
  48   1              {
  49   2                      // This happens every 60.025 seconds, not simultaneous
  50   2                      // with above tasks
  51   2                      count2 = 0;
  52   2                      event_word |= EVENT_AGE_ARP_CACHE;
  53   2              }
  54   1      }
  55          
C51 COMPILER V7.06   TIMER                                                                 03/06/2004 14:02:48 PAGE 2   

  56          
  57          
  58          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    229    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =      4    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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