C51 COMPILER V7.09   MAIN                                                                  05/22/2004 01:49:23 PAGE 1   


C51 COMPILER V7.09, COMPILATION OF MODULE MAIN
OBJECT MODULE PLACED IN main.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE main.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include <reg52.h>
   2          #include <stdio.h>
   3          
   4          /*------------------------------------------------
   5          Timer 1 Interrupt Service Routine.
   6          
   7          Set a breakpoint on 'overflow_count++' and run the
   8          program in the debugger.  You will see this line
   9          executes every 100 clock cycles (or 10,000 Hz).
  10          
  11          So, overflow_count is actually a 1/10,000 sec
  12          timer.
  13          ------------------------------------------------*/
  14          static unsigned long overflow_count = 0;
  15          
  16          void timer1_ISR (void) interrupt 3
  17          {
  18   1      overflow_count++;   /* Increment the overflow count */
  19   1      }
  20          void main (void)
  21          {
  22   1      /*--------------------------------------
  23   1      Set Timer1 for 8-bit timer with reload
  24   1      (mode 2). The timer counts to 255,
  25   1      overflows, is reloaded with 156, and
  26   1      generates an interrupt.
  27   1      
  28   1      Set the Timer1 Run control bit.
  29   1      --------------------------------------*/
  30   1      TMOD = (TMOD & 0x0F) | 0x20;  /* Set Mode (8-bit timer with reload) */
  31   1      TH1 = 256 - 100;              /* Reload TL1 to count 100 clocks */
  32   1      TL1 = TH1;
  33   1      ET1 = 1;                      /* Enable Timer 1 Interrupts */
  34   1      TR1 = 1;                      /* Start Timer 1 Running */
  35   1      EA = 1;                       /* Global Interrupt Enable */
  36   1      
  37   1      /*--------------------------------------
  38   1      Do Nothing.  Actually, the timer 1
  39   1      interrupt will occur every 100 clocks.
  40   1      Since the oscillator runs at 12 MHz,
  41   1      the interrupt will happen every 10 KHz.
  42   1      --------------------------------------*/
  43   1      while (1)
  44   1        {
  45   2        }
  46   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     52    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      4    ----
   IDATA SIZE       =   ----    ----
C51 COMPILER V7.09   MAIN                                                                  05/22/2004 01:49:23 PAGE 2   

   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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