C51 COMPILER V6.10  LED_FLAS                                                               04/18/2001 11:42:10 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 OPTIMIZE(6,SPEED) BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          /*------------------------------------------------------------------*-
   2          
   3             LED_flas.C (v1.00)
   4          
   5            ------------------------------------------------------------------
   6             
   7             Simple 'Flash LED' test function.
   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          
  27          #include "LED_flas.h"
  28          
  29          // ------ Private variable definitions -----------------------------
  30          
  31          static bit LED_state_G;
  32          
  33          /*------------------------------------------------------------------*-
  34          
  35            LED_Flash_Init()
  36          
  37            - See below.
  38          
  39          -*------------------------------------------------------------------*/
  40          void LED_Flash_Init(void)
  41             {
  42   1         LED_state_G = 0;
  43   1         }
  44          
  45          
  46          /*------------------------------------------------------------------*-
  47          
  48            LED_Flash_Update()
  49          
  50            Flashes an LED (or pulses a buzzer, etc) on a specified port pin.
  51          
  52            Must call at twice the required flash rate: thus, for 1 Hz
  53            flash (on for 0.5 seconds, off for 0.5 seconds) must schedule
  54            at 2 Hz.
  55          
C51 COMPILER V6.10  LED_FLAS                                                               04/18/2001 11:42:10 PAGE 2   

  56          -*------------------------------------------------------------------*/
  57          void LED_Flash_Update(void)
  58             {
  59   1         // Change the LED from OFF to ON (or vice versa)
  60   1         if (LED_state_G == 1)
  61   1            {
  62   2            LED_state_G = 0;
  63   2            LED_pin = 0;
  64   2            }
  65   1         else
  66   1            {
  67   2            LED_state_G = 1;
  68   2            LED_pin = 1;
  69   2            }
  70   1         }
  71          
  72          /*------------------------------------------------------------------*-
  73            ---- END OF FILE -------------------------------------------------
  74          -*------------------------------------------------------------------*/


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)