pc_o_t1.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_O_T1                                                                04/19/2001 11:40:07 PAGE 1   


C51 COMPILER V6.10, COMPILATION OF MODULE PC_O_T1
OBJECT MODULE PLACED IN .\PC_O_T1.OBJ
COMPILER INVOKED BY: C:\KEIL\C51\BIN\C51.EXE .\PC_O_T1.c OPTIMIZE(6,SIZE) BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          /*------------------------------------------------------------------*-
   2          
   3             PC_O_A.C (v1.01)
   4          
   5            ------------------------------------------------------------------
   6          
   7             Simple write-only PC link library Version A (generic)
   8             [Sends data to PC - cannot receive data from PC]
   9          
  10             Uses the USART, and Pin 3.1 (Tx) 
  11          
  12             See text for details (Chapter 18).
  13          
  14          
  15             COPYRIGHT
  16             ---------
  17          
  18             This code is from the book:
  19          
  20             PATTERNS FOR TIME-TRIGGERED EMBEDDED SYSTEMS by Michael J. Pont 
  21             [Pearson Education, 2001; ISBN: 0-201-33138-1].
  22          
  23             This code is copyright (c) 2001 by Michael J. Pont.
  24           
  25             See book for copyright details and other information.
  26          
  27          -*------------------------------------------------------------------*/
  28          
  29          #include "Main.h"
  30          #include "PC_O_T1.h"
  31          
  32          // ------ Public variable declarations -----------------------------
  33          
  34          extern tByte Out_written_index_G;  
  35          extern tByte Out_waiting_index_G;  
  36          
  37          /*------------------------------------------------------------------*-
  38          
  39            PC_LINK_O_Init_T1()
  40          
  41            This version uses T1 for baud rate generation.
  42          
  43            Uses 8051 (internal) UART hardware
  44          
  45          -*------------------------------------------------------------------*/
  46          void PC_LINK_O_Init_T1(const tWord BAUD_RATE)
  47             {
  48   1         PCON &= 0x7F;   // Set SMOD bit to 0 (don't double baud rates)
  49   1      
  50   1         //  Receiver disabled
  51   1         //  8-bit data, 1 start bit, 1 stop bit, variable baud rate (asynchronous)
  52   1         SCON = 0x42;
  53   1      
  54   1         TMOD |= 0x20;   // T1 in mode 2, 8-bit auto reload
  55   1      
C51 COMPILER V6.10  PC_O_T1                                                                04/19/2001 11:40:07 PAGE 2   

  56   1         TH1 = (256 - (tByte)((((tLong)OSC_FREQ / 100) * 3125) 
  57   1                  / ((tLong) BAUD_RATE * OSC_PER_INST * 1000)));
  58   1      
  59   1         TL1 = TH1;  
  60   1         TR1 = 1;  // Run the timer
  61   1         TI = 1;   // Send first character (dummy)
  62   1      
  63   1         // Set up the buffers for reading and writing
  64   1         Out_written_index_G = 0;
  65   1         Out_waiting_index_G = 0;
  66   1      
  67   1         PC_LINK_O_Write_String_To_Buffer("Serial OK\n");
  68   1      
  69   1         // Interrupt *NOT* enabled
  70   1         ES = 0;
  71   1         }
  72          
  73          /*------------------------------------------------------------------*-
  74            ---- END OF FILE -------------------------------------------------
  75          -*------------------------------------------------------------------*/
  76          
  77          
  78          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     69    ----
   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)