t_lights.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  T_LIGHTS                                                               04/18/2001 14:01:18 PAGE 1   


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

stmt level    source

   1          /*------------------------------------------------------------------*-
   2          
   3             T_lights.C (v1.00)
   4          
   5            ------------------------------------------------------------------
   6             
   7             Traffic light control program (Test Version 1.0)
   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          
  25          #include "Main.h"
  26          #include "Port.h"
  27          
  28          #include "T_lights.h"
  29          
  30          // ------ Private constants ----------------------------------------
  31          
  32          // Easy to change logic here
  33          #define ON  0
  34          #define OFF 1
  35          
  36          // Times in each of the (four) possible light states
  37          // (Times are in seconds - must call the update task once per second)
  38          //
  39          #define RED_DURATION  (10)
  40          #define RED_AND_AMBER_DURATION  (10)
  41          
  42          // NOTE: 
  43          // GREEN_DURATION must equal RED_DURATION
  44          // AMBER_DURATION must equal RED_AND_AMBER_DURATION
  45          #define GREEN_DURATION RED_DURATION 
  46          #define AMBER_DURATION RED_AND_AMBER_DURATION
  47          
  48          // ------ Private variables ----------------------------------------
  49          
  50          // The state of the system
  51          static eLight_State Light_state_G;
  52          
  53          /*------------------------------------------------------------------*-
  54          
  55            TRAFFIC_LIGHTS_Init()
C51 COMPILER V6.10  T_LIGHTS                                                               04/18/2001 14:01:18 PAGE 2   

  56          
  57            Prepare for the scheduled traffic light activity.
  58          
  59          -*------------------------------------------------------------------*/
  60          void TRAFFIC_LIGHTS_Init(const eLight_State START_STATE)
  61             {
  62   1         Light_state_G = START_STATE;  // Slave is Green; Master is Red
  63   1         }
  64          
  65          
  66          /*------------------------------------------------------------------*-
  67          
  68            TRAFFIC_LIGHTS_Update()
  69          
  70            Must be called once per second.
  71          
  72          -*------------------------------------------------------------------*/
  73          void TRAFFIC_LIGHTS_Update(void)
  74             {
  75   1         static tWord Time_in_state;
  76   1      
  77   1         switch (Light_state_G)
  78   1            {
  79   2            case RED: 
  80   2               {
  81   3               Red_light = ON;
  82   3               Amber_light = OFF;
  83   3               Green_light = OFF;
  84   3      
  85   3               if (++Time_in_state == RED_DURATION)
  86   3                  {
  87   4                  Light_state_G = RED_AND_AMBER;
  88   4                  Time_in_state = 0;
  89   4                  }
  90   3      
  91   3               break;
  92   3               }
  93   2      
  94   2            case RED_AND_AMBER: 
  95   2               {
  96   3               Red_light = ON;
  97   3               Amber_light = ON;
  98   3               Green_light = OFF;
  99   3      
 100   3               if (++Time_in_state == RED_AND_AMBER_DURATION)
 101   3                  {
 102   4                  Light_state_G = GREEN;
 103   4                  Time_in_state = 0;
 104   4                  }
 105   3      
 106   3               break;
 107   3               }
 108   2      
 109   2            case GREEN: 
 110   2               {
 111   3               Red_light = OFF;
 112   3               Amber_light = OFF;
 113   3               Green_light = ON;
 114   3      
 115   3               if (++Time_in_state == GREEN_DURATION)
 116   3                  {
 117   4                  Light_state_G = AMBER;
C51 COMPILER V6.10  T_LIGHTS                                                               04/18/2001 14:01:18 PAGE 3   

 118   4                  Time_in_state = 0;
 119   4                  }
 120   3      
 121   3               break;
 122   3               }
 123   2      
 124   2            case AMBER: 
 125   2               {
 126   3               Red_light = OFF;
 127   3               Amber_light = ON;
 128   3               Green_light = OFF;
 129   3      
 130   3               if (++Time_in_state == AMBER_DURATION)
 131   3                  {
 132   4                  Light_state_G = RED;
 133   4                  Time_in_state = 0;
 134   4                  }
 135   3      
 136   3               break;
 137   3               }
 138   2            }
 139   1         }
 140          
 141          /*------------------------------------------------------------------*-
 142            ---- END OF FILE -------------------------------------------------
 143          -*------------------------------------------------------------------*/


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    129    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      3    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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