C51 COMPILER V6.10  LED_FLAS                                                               04/18/2001 16:52:57 PAGE 1   


C51 COMPILER V6.10, COMPILATION OF MODULE LED_FLAS
OBJECT MODULE PLACED IN .\LED_FLAS.OBJ
COMPILER INVOKED BY: C:\KEIL\C51\BIN\C51.EXE .\LED_FLAS.C BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          /*------------------------------------------------------------------*-
   2          
   3             LED_flas.C (v1.00)
   4          
   5            ------------------------------------------------------------------
   6             
   7             Simple 'Flash LED' test function for scheduler.
   8          
   9          
  10             COPYRIGHT
  11             ---------
  12          
  13             This code is from the book:
  14          
  15             PATTERNS FOR TIME-TRIGGERED EMBEDDED SYSTEMS by Michael J. Pont 
  16             [Pearson Education, 2001; ISBN: 0-201-33138-1].
  17          
  18             This code is copyright (c) 2001 by Michael J. Pont.
  19           
  20             See book for copyright details and other information.
  21          
  22          -*------------------------------------------------------------------*/
  23          
  24          #include "Main.h"
  25          #include "Port.h"
  26          #include "LED_flas.h"
  27          
  28          // ------ Private variable definitions -----------------------------
  29          
  30          static bit LED_state_G;
  31          
  32          /*------------------------------------------------------------------*-
  33          
  34            LED_Flash_Init()
  35          
  36            - See below.
  37          
  38          -*------------------------------------------------------------------*/
  39          void LED_Flash_Init(void)
  40             {
  41   1         LED_state_G = 0;
  42   1         }
  43          
  44          
  45          /*------------------------------------------------------------------*-
  46          
  47            LED_Flash_Update()
  48          
  49            Flashes an LED (or pulses a buzzer, etc) on a specified port pin.
  50          
  51            Must schedule at twice the required flash rate: thus, for 1 Hz
  52            flash (on for 0.5 seconds, off for 0.5 seconds) must schedule
  53            at 2 Hz.
  54          
  55          -*------------------------------------------------------------------*/
C51 COMPILER V6.10  LED_FLAS                                                               04/18/2001 16:52:57 PAGE 2   

  56          void LED_Flash_Update(void)
  57             {
  58   1         // Change the LED from OFF to ON (or vice versa)
  59   1         if (LED_state_G == 1)
  60   1            {
  61   2            LED_state_G = 0;
  62   2            LED_pin = 0;
  63   2            }
  64   1         else
  65   1            {
  66   2            LED_state_G = 1;
  67   2            LED_pin = 1;
  68   2            }
  69   1         }
  70          
  71          /*------------------------------------------------------------------*-
  72            ---- END OF FILE -------------------------------------------------
  73          -*------------------------------------------------------------------*/


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     16    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =      1    ----
END OF MODULE INFORMATION.


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