t_lights.lst

Keil uVision2用C语言开发的交通灯嵌入式系统

C51 COMPILER V6.21  T_LIGHTS                                                               01/23/2002 18:00:41 PAGE 1   


C51 COMPILER V6.21, COMPILATION OF MODULE T_LIGHTS
OBJECT MODULE PLACED IN T_Lights.OBJ
COMPILER INVOKED BY: C:\KEIL\C51\BIN\C51.EXE T_Lights.c OPTIMIZE(6,SPEED) 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             COPYRIGHT
  10             ---------
  11          
  12             This code is associated with the book:
  13          
  14             EMBEDDED C by Michael J. Pont 
  15             [Pearson Education, 2002: ISBN: 0-201-79523-X].
  16          
  17             This code is copyright (c) 2001 by Michael J. Pont.
  18           
  19             See book for copyright details and other information.
  20          
  21          
  22          -*------------------------------------------------------------------*/
  23          
  24          #include "Main.H"
  25          #include "Port.H"
  26          
  27          #include "T_lights.H"
  28          
  29          // ------ Private constants ----------------------------------------
  30          
  31          // Easy to change logic here
  32          #define ON  0
  33          #define OFF 1
  34          
  35          // Times in each of the (four) possible light states
  36          // (Times are in seconds)
  37          #define RED_DURATION  20
  38          #define RED_AND_AMBER_DURATION  5
  39          #define GREEN_DURATION 30
  40          #define AMBER_DURATION 5
  41          
  42          
  43          // ------ Private variables ----------------------------------------
  44          
  45          // The state of the system
  46          static eLight_State Light_state_G;
  47          
  48          // The time in that state
  49          static tLong Time_in_state;
  50          
  51          // Used by sEOS
  52          static tByte Call_count_G = 0;
  53          
  54          
  55          /*------------------------------------------------------------------*-
C51 COMPILER V6.21  T_LIGHTS                                                               01/23/2002 18:00:41 PAGE 2   

  56          
  57            TRAFFIC_LIGHTS_Init()
  58          
  59            Prepare for the traffic light activity.
  60          
  61          -*------------------------------------------------------------------*/
  62          void TRAFFIC_LIGHTS_Init(const eLight_State START_STATE)
  63             {
  64   1         Light_state_G = START_STATE;  // Decide on initial state
  65   1         }
  66          
  67          
  68          /*------------------------------------------------------------------*-
  69          
  70            TRAFFIC_LIGHTS_Update()
  71          
  72            Must be called once per second.
  73          
  74          -*------------------------------------------------------------------*/
  75          void TRAFFIC_LIGHTS_Update(void)
  76             {
  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 V6.21  T_LIGHTS                                                               01/23/2002 18:00:41 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        =    160    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      6    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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