pc_io_in.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  PC_IO_IN                                                               04/18/2001 16:09:39 PAGE 1   


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

stmt level    source

   1          /*------------------------------------------------------------------*-
   2          
   3             PC_IN_in.C (v1.01)
   4          
   5            ------------------------------------------------------------------
   6          
   7             PC link library. Bidirectional. c515,517 etc - internal baud rate.
   8          
   9             Uses the USART, and Pins 3.1 (Tx) and 3.0 (Rx) 
  10          
  11             See text for details.
  12          
  13          
  14             COPYRIGHT
  15             ---------
  16          
  17             This code is from the book:
  18          
  19             PATTERNS FOR TIME-TRIGGERED EMBEDDED SYSTEMS by Michael J. Pont 
  20             [Pearson Education, 2001; ISBN: 0-201-33138-1].
  21          
  22             This code is copyright (c) 2001 by Michael J. Pont.
  23           
  24             See book for copyright details and other information.
  25          
  26          -*------------------------------------------------------------------*/
  27          
  28          #include "Main.h"
  29          #include "PC_IO_in.h"
  30          
  31          // ------ Public variable declarations -----------------------------
  32          
  33          extern tByte In_read_index_G;     
  34          extern tByte In_waiting_index_G;  
  35          
  36          extern tByte Out_written_index_G;  
  37          extern tByte Out_waiting_index_G;  
  38          
  39          /*------------------------------------------------------------------*-
  40          
  41            PC_LINK_Init_Internal()
  42          
  43            This version uses internal baud rate generator on C5x5 family.
  44          
  45          -*------------------------------------------------------------------*/
  46          void PC_LINK_IO_Init_Internal(const tWord BAUD_RATE)
  47             {
  48   1         tWord SRELplus1024;
  49   1         tWord SRELx;
  50   1      
  51   1         PCON &= 0x7F;   // Set SMOD bit to 0 (don't double baud rates)
  52   1      
  53   1         //  Receiver enabled.
  54   1         //  8-bit data, 1 start bit, 1 stop bit, 
  55   1         //  Variable baud rate (asynchronous)
C51 COMPILER V6.10  PC_IO_IN                                                               04/18/2001 16:09:39 PAGE 2   

  56   1         //  Receive flag will only be set if a valid stop bit is received
  57   1         //  Set TI (transmit buffer is empty)
  58   1         SCON = 0x72;
  59   1      
  60   1         // Use the internal baudrate generator (80c5x5 family)
  61   1         ADCON0 |= 0x80;
  62   1      
  63   1         // Set the baud rate (begin)
  64   1         SRELplus1024 = (tWord)((((tLong) OSC_FREQ / 100) * 3125) 
  65   1                           / ((tLong) BAUD_RATE * 1000));
  66   1      
  67   1         SRELx = 1024 - SRELplus1024;
  68   1      
  69   1         SRELL = (tByte)(SRELx & 0x00FF);
  70   1         SRELH = (tByte)((SRELx & 0x0300) >> 8);
  71   1      
  72   1         TI = 1;
  73   1         // Set the baud rate (end)
  74   1      
  75   1         // Set up the buffers for reading and writing
  76   1         In_read_index_G = 0;
  77   1         In_waiting_index_G = 0;
  78   1         Out_written_index_G = 0;
  79   1         Out_waiting_index_G = 0;
  80   1      
  81   1         PC_LINK_IO_Write_String_To_Buffer("Serial OK\n");
  82   1      
  83   1         // Serial interrupt *NOT* enabled
  84   1         ES = 0;
  85   1         }
  86          
  87          /*------------------------------------------------------------------*-
  88            ---- END OF FILE -------------------------------------------------
  89          -*------------------------------------------------------------------*/
  90          
  91          
  92          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     79    ----
   CONSTANT SIZE    =     11    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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