uart_t1.lst

Atmel Uart C51程序（timer1方式）

C51 COMPILER V7.10   UART_T1                                                               04/23/2004 09:46:52 PAGE 1   


C51 COMPILER V7.10, COMPILATION OF MODULE UART_T1
OBJECT MODULE PLACED IN uart_t1.OBJ
COMPILER INVOKED BY: C:\KEIL\C51\BIN\C51.EXE uart_t1.c BROWSE DEBUG OBJECTEXTEND TABS(3)

line level    source

   1          /**
   2           * @file $RCSfile: uart_t1.c,v $
   3           *
   4           * Copyright (c) 2004 Atmel.
   5           *
   6           * Please read file license.txt for copyright notice.
   7           *
   8           * @brief This file is an example to use uart with timer1.
   9           *
  10           * This file can be parsed by Doxygen for automatic documentation
  11           * generation.
  12           * Put here the functional description of this file within the software
  13           * architecture of your program.
  14           *
  15           * @version $Revision: 1.0 $ $Name:  $
  16           */
  17          
  18          /* @section  I N C L U D E S */
  19          #include "reg_c51.h"
  20          
  21          char uart_data;
  22          
  23          /**
  24           * FUNCTION_PURPOSE: This file set up uart in mode 1 (8 bits uart) with
  25           * timer 1 in mode 2 (8 bits auto reload timer).
  26           * FUNCTION_INPUTS: void
  27           * FUNCTION_OUTPUTS: void
  28           */
  29          void main (void) 
  30          {
  31   1         PCON |= 0x80;
  32   1         SCON = 0x50;                 /* uart in mode 1 (8 bit), REN=1 */
  33   1         TMOD = TMOD | 0x20 ;         /* Timer 1 in mode 2 */
  34   1         TH1  = 0xF3;                 /* 9600 Bds at 11.059MHz */
  35   1         TL1  = 0xF3;                 /* 9600 Bds at 11.059MHz */
  36   1         ES = 1;                      /* Enable serial interrupt  */
  37   1         EA = 1;                      /* Enable global interrupt */
  38   1         TR1 = 1;                     /* Timer 1 run */
  39   1      
  40   1         while(1);                    /* endless */
  41   1      }     
  42          
  43          /**
  44           * FUNCTION_PURPOSE: serial interrupt, echo received data.
  45           * FUNCTION_INPUTS: P3.0(RXD) serial input
  46           * FUNCTION_OUTPUTS: P3.1(TXD) serial output
  47           */
  48          void serial_IT(void) interrupt 4 
  49          {
  50   1      
  51   1         if (RI == 1) 
  52   1         {                            /* if reception occur */
  53   2           RI = 0;                    /* clear reception flag for next reception */
  54   2           uart_data = SBUF;          /* Read receive data */
  55   2           SBUF = uart_data;          /* Send back same data on uart*/
C51 COMPILER V7.10   UART_T1                                                               04/23/2004 09:46:52 PAGE 2   

  56   2         }
  57   1         else
  58   1         {                            /* if emission occur */
  59   2           TI = 0;                    /* clear emission flag for next emission*/    
  60   2         }
  61   1      }
  62          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     38    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      1    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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