simple_eos.lst

Embedded C 这本书的范例光碟程式

C51 COMPILER V7.07   SIMPLE_EOS                                                            06/12/2006 21:12:15 PAGE 1   


C51 COMPILER V7.07, COMPILATION OF MODULE SIMPLE_EOS
OBJECT MODULE PLACED IN Simple_EOS.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE Simple_EOS.c OPTIMIZE(6,SIZE) BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          /*------------------------------------------------------------------*-
   2             Simple_EOS.C (v1.00)
   3            ------------------------------------------------------------------
   4             Main file for Simple Embedded Operating System (sEOS) for 8051. 
   5          -*------------------------------------------------------------------*/
   6          #include "Main.H"
   7          #include "Simple_EOS.H"
   8          #include "Menu_Data.H"
   9          /*------------------------------------------------------------------*-  
  10            sEOS_ISR()
  11            Invoked periodically by Timer 2 overflow: 
  12            see sEOS_Init_Timer2() for timing details.
  13          -*------------------------------------------------------------------*/
  14          void sEOS_ISR() interrupt INTERRUPT_Timer_2_Overflow
  15             {
  16   1         TF2 = 0;  // Must manually reset the T2 flag   
  17   1         //===== USER CODE - Begin =======================================
  18   1         // Call MENU_Command_Processor every 5ms
  19   1         MENU_Command_Processor();
  20   1         //===== USER CODE - End =========================================
  21   1         }
  22          /*------------------------------------------------------------------*-  
  23            sEOS_Init_Timer2()
  24          
  25            Sets up Timer 2 to drive the simple EOS.
  26            Parameter gives tick interval in MILLISECONDS.
  27            Max tick interval is ~60ms (12 MHz oscillator).
  28          
  29            Note: Precise tick intervals are only possible with certain 
  30            oscillator / tick interval combinations.  If timing is important,
  31            you should check the timing calculations manually. 
  32          -*------------------------------------------------------------------*/
  33          void sEOS_Init_Timer2(const tByte TICK_MS)
  34          {
  35   1         tLong Inc;
  36   1         tWord Reload_16;
  37   1         tByte Reload_08H, Reload_08L;
  38   1         // Timer 2 is configured as a 16-bit timer,
  39   1         // which is automatically reloaded when it overflows
  40   1         T2CON   = 0x04;   // Load Timer 2 control register
  41   1         // Number of timer increments required (max 65536)
  42   1         Inc = ((tLong)TICK_MS * (OSC_FREQ/1000)) / (tLong)OSC_PER_INST;   
  43   1         // 16-bit reload value
  44   1         Reload_16 = (tWord) (65536UL - Inc);
  45   1         // 8-bit reload values (High & Low)
  46   1         Reload_08H = (tByte)(Reload_16 / 256);
  47   1         Reload_08L = (tByte)(Reload_16 % 256);
  48   1         // Used for manually checking timing (in simulator)
  49   1         //P2 = Reload_08H;
  50   1         //P3 = Reload_08L;
  51   1         TH2     = Reload_08H;   // Load Timer 2 high byte
  52   1         RCAP2H  = Reload_08H;   // Load Timer 2 reload capt. reg. high byte
  53   1         TL2     = Reload_08L;   // Load Timer 2 low byte
  54   1         RCAP2L  = Reload_08L;   // Load Timer 2 reload capt. reg. low byte
  55   1         // Timer 2 interrupt is enabled, and ISR will be called 
C51 COMPILER V7.07   SIMPLE_EOS                                                            06/12/2006 21:12:15 PAGE 2   

  56   1         // whenever the timer overflows.
  57   1         ET2     = 1;
  58   1         // Start Timer 2 running
  59   1         TR2   = 1;     
  60   1         EA = 1;            // Globally enable interrupts
  61   1      }
  62          /*  sEOS_Go_To_Sleep() */
  63          void sEOS_Go_To_Sleep(void)
  64          {
  65   1         PCON |= 0x01;    // Enter idle mode (generic 8051 version)
  66   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    123    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----       4
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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