pulcnt_s.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  PULCNT_S                                                               04/19/2001 11:59:24 PAGE 1   


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

stmt level    source

   1          /*------------------------------------------------------------------*-
   2          
   3             PulCnt_S.C (v1.00)
   4          
   5            ------------------------------------------------------------------
   6          
   7             Software pulse-count library (see Chapter 30).
   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 "Bargraph.h"
  28          #include "PulCnt_S.h"
  29          
  30          // ------ Public variable definitions -----------------------------
  31          
  32          // Stores the average count value
  33          extern tBargraph Count_G;
  34          
  35          // ------ Private constants ----------------------------------------
  36          
  37          #define PULSE_HIGH (1)
  38          #define PULSE_LOW (0)
  39          
  40          // ------ Private variable definitions------------------------------
  41          
  42          // Stores the instantaneous count value
  43          static tWord Count_local_G;
  44          
  45          // The previous state of the pulse-count pin
  46          static bit Previous_state_G;
  47          
  48          /*------------------------------------------------------------------*-
  49          
  50            PC_SOFT_Init() 
  51          
  52            Prepare for software pulse counts.
  53          
  54          -*------------------------------------------------------------------*/
  55          void PC_SOFT_Init(void)
C51 COMPILER V6.10  PULCNT_S                                                               04/19/2001 11:59:24 PAGE 2   

  56             {
  57   1         Count_local_G = 0;
  58   1         Count_G = 0;
  59   1         }
  60          
  61          /*------------------------------------------------------------------*-
  62          
  63            PC_SOFT_Poll_Count()
  64          
  65            Using software to count falling edges on a specified pin
  66            - T0 is *NOT* used here.
  67          
  68          -*------------------------------------------------------------------*/
  69          void PC_SOFT_Poll_Count(void)
  70             {
  71   1         bit State = Count_pin;
  72   1      
  73   1         if ((Previous_state_G == PULSE_HIGH) && (State == PULSE_LOW))
  74   1            {
  75   2            Count_local_G++;
  76   2            } 
  77   1      
  78   1         Previous_state_G = State;     
  79   1         }
  80          
  81          /*------------------------------------------------------------------*-
  82          
  83            PC_SOFT_Get_Count()
  84          
  85            Schedule this function at regular intervals.
  86          
  87            Copies 'polled' count to global variable.
  88          
  89          -*------------------------------------------------------------------*/
  90          void PC_SOFT_Get_Count(void)
  91             {
  92   1         Count_G = Count_local_G;
  93   1         Count_local_G = 0;
  94   1         }
  95          
  96          /*------------------------------------------------------------------*-
  97            ---- END OF FILE -------------------------------------------------
  98          -*------------------------------------------------------------------*/
  99           


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     45    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      2    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =      1       1
END OF MODULE INFORMATION.


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