led_swit.lst

时间触发嵌入式系统设计模式:使用8051系列微控制器开发可靠应用

C51 COMPILER V6.10  LED_SWIT                                                               04/18/2001 16:16:20 PAGE 1   


C51 COMPILER V6.10, COMPILATION OF MODULE LED_SWIT
OBJECT MODULE PLACED IN .\LED_SWIT.OBJ
COMPILER INVOKED BY: C:\KEIL\C51\BIN\C51.EXE .\LED_SWIT.C OPTIMIZE(6,SIZE) BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          /*------------------------------------------------------------------*-
   2          
   3             LED_Swit.C (v1.00)
   4          
   5            ------------------------------------------------------------------
   6             
   7             Simple 'Flash LED' test function for scheduler.
   8          
   9             (Controlled by switch press)
  10          
  11          
  12             COPYRIGHT
  13             ---------
  14          
  15             This code is from the book:
  16          
  17             PATTERNS FOR TIME-TRIGGERED EMBEDDED SYSTEMS by Michael J. Pont 
  18             [Pearson Education, 2001; ISBN: 0-201-33138-1].
  19          
  20             This code is copyright (c) 2001 by Michael J. Pont.
  21           
  22             See book for copyright details and other information.
  23          
  24          -*------------------------------------------------------------------*/
  25          
  26          #include "Main.h"
  27          #include "Port.h"
  28          
  29          #include "LED_Swit.h"
  30          
  31          // ------ Public variable declarations -----------------------------
  32          
  33          extern bit Sw_pressed_G;
  34          
  35          
  36          // ------ Private variables ----------------------------------------
  37          
  38          static bit LED_state_G;
  39          
  40          
  41          /*------------------------------------------------------------------*-
  42          
  43            LED_Flash_Switch_Init()
  44          
  45            - See below.
  46          
  47          -*------------------------------------------------------------------*/
  48          void LED_Flash_Switch_Init(void)
  49             {
  50   1         LED_state_G = 0;
  51   1         }
  52          
  53          
  54          /*------------------------------------------------------------------*-
  55          
C51 COMPILER V6.10  LED_SWIT                                                               04/18/2001 16:16:20 PAGE 2   

  56            LED_Flash_Switch_Update()
  57          
  58            Flashes an LED (or pulses a buzzer, etc) on a specified port pin.
  59          
  60            Must schedule at twice the required flash rate: thus, for 1 Hz
  61            flash (on for 0.5 seconds, off for 0.5 seconds) must schedule
  62            at 2 Hz.
  63          
  64          -*------------------------------------------------------------------*/
  65          void LED_Flash_Switch_Update(void)
  66             {
  67   1         // Do nothing if switch is not pressed
  68   1         if (!Sw_pressed_G)
  69   1            {
  70   2            return;
  71   2            }
  72   1      
  73   1         // Change the LED from OFF to ON (or vice versa)
  74   1         if (LED_state_G == 1)
  75   1            {
  76   2            LED_state_G = 0;
  77   2            LED_pin = 0;
  78   2            }
  79   1         else
  80   1            {
  81   2            LED_state_G = 1;
  82   2            LED_pin = 1;
  83   2            }
  84   1         }
  85          
  86          /*------------------------------------------------------------------*-
  87            ---- END OF FILE -------------------------------------------------
  88          -*------------------------------------------------------------------*/


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     19    ----
   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)