adc_m150.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  ADC_M150                                                               04/18/2001 17:58:16 PAGE 1   


C51 COMPILER V6.10, COMPILATION OF MODULE ADC_M150
OBJECT MODULE PLACED IN .\ADC_M150.OBJ
COMPILER INVOKED BY: C:\KEIL\C51\BIN\C51.EXE .\ADC_M150.C BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          /*------------------------------------------------------------------*-
   2          
   3             ADC_m150.c (v1.00)
   4          
   5            ------------------------------------------------------------------
   6          
   7             Simple, single-channel, 8-bit A-D (input) library for 8051 family
   8             - uses Max150 8-bit parallel ADC.
   9          
  10             See Chapter 32 for details.
  11          
  12          
  13             COPYRIGHT
  14             ---------
  15          
  16             This code is from the book:
  17          
  18             PATTERNS FOR TIME-TRIGGERED EMBEDDED SYSTEMS by Michael J. Pont 
  19             [Pearson Education, 2001; ISBN: 0-201-33138-1].
  20          
  21             This code is copyright (c) 2001 by Michael J. Pont.
  22           
  23             See book for copyright details and other information.
  24          
  25          -*------------------------------------------------------------------*/
  26          
  27          #include "Main.H"
  28          #include "Port.h"
  29          
  30          #include "Bargraph.h"
  31          
  32          // ------ Public variable definitions ------------------------------
  33          
  34          // Stores the latest ADC reading
  35          tByte Analog_G;
  36          
  37          // ------ Public variable declarations -----------------------------
  38          
  39          extern tByte Error_code_G;
  40          
  41          
  42          /*------------------------------------------------------------------*-
  43          
  44            ADC_Max150_Init()
  45          
  46            Set up the Max150 ADC.  Using WR-RD mode (see data sheet)
  47          
  48          -*------------------------------------------------------------------*/
  49          void ADC_Max150_Init(void)
  50             {
  51   1         // Set 'NOT read' pin high
  52   1         ADC_Max150_NOT_Read_pin = 1;
  53   1      
  54   1         // Set 'NOT write' pin high
  55   1         ADC_Max150_NOT_Write_pin = 1;
C51 COMPILER V6.10  ADC_M150                                                               04/18/2001 17:58:16 PAGE 2   

  56   1      
  57   1         // Prepare 'NOT Int' pin for reading
  58   1         ADC_Max150_NOT_Int_pin   = 1;
  59   1         }
  60          
  61          /*------------------------------------------------------------------*-
  62          
  63            ADC_Max150_Get_Sample()
  64          
  65            Get a single data sample (8 bits) from the ADC.
  66          
  67          -*------------------------------------------------------------------*/
  68          void ADC_Max150_Get_Sample(void)
  69             {
  70   1         tWord Time_out_loop = 1;
  71   1      
  72   1         // Start conversion by pulling 'NOT Write' low
  73   1         ADC_Max150_NOT_Write_pin = 0;
  74   1      
  75   1         // Take sample from A-D (with simple loop time-out)
  76   1         while ((ADC_Max150_NOT_Int_pin == 1) && (Time_out_loop != 0));
  77   1            {
  78   2            Time_out_loop++;  // Disable for use in dScope...
  79   2            }
  80   1      
  81   1         if (!Time_out_loop)
  82   1            {
  83   2            // Timed out
  84   2            Error_code_G =  
  85   2            Analog_G = 0;
  86   2            }
  87   1         else 
  88   1            {     
  89   2            // Set port to 'read' mode
  90   2            ADC_Max150_port = 0xFF;  
  91   2      
  92   2            // Set 'NOT read' pin low
  93   2            ADC_Max150_NOT_Read_pin = 0;
  94   2      
  95   2            // ADC result is now available
  96   2            Analog_G = ADC_Max150_port; 
  97   2      
  98   2            // Set 'NOT read' pin high
  99   2            ADC_Max150_NOT_Read_pin = 1;
 100   2            }
 101   1      
 102   1         // Pull 'NOT Write' high
 103   1         ADC_Max150_NOT_Write_pin = 1;
 104   1         } 
 105          
 106          /*------------------------------------------------------------------*-
 107            ---- END OF FILE -------------------------------------------------
 108          -*------------------------------------------------------------------*/


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     48    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      1    ----
   IDATA SIZE       =   ----    ----
C51 COMPILER V6.10  ADC_M150                                                               04/18/2001 17:58:16 PAGE 3   

   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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