485

基于proteus的485串口仿真电路及程序

C51 COMPILER V8.02   TEXT2                                                                 05/12/2011 11:33:33 PAGE 1   


C51 COMPILER V8.02, COMPILATION OF MODULE TEXT2
OBJECT MODULE PLACED IN Text2.OBJ
COMPILER INVOKED BY: D:\Program Files\Keil\C51\BIN\C51.EXE Text2.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include <reg51.h>
   2          #include <string.h>
   3          
   4          #define uchar unsigned char
   5          #define uint unsigned int
   6          
   7          sbit Enable1=P3^4;
   8          sbit Enable2=P3^5;
   9          
  10          
  11          uchar c;
  12          //延时函数
  13          void delay(uint x)
  14          {
  15   1              uchar i;
  16   1              while(x--) for(i=0;i<120;i++); 
  17   1      }
  18          
  19          //初始化51单片机
  20          void init_cpu()
  21          {
  22   1              TMOD=0x20;      //T1工作在模式2
  23   1              SCON=0x50;      //串口工作在方式1,允许接收
  24   1              PCON=0x00;         //波特率不倍增
  25   1              TL1=0xFD;
  26   1              TH1=0xFD;//波特率9600
  27   1              TI=RI=0;
  28   1              EA=1;
  29   1              ES=1;
  30   1      
  31   1              TR1=1;
  32   1              Enable1=0;
  33   1              Enable2=1;
  34   1      }
  35          
  36          
  37          void main()
  38          {
  39   1      
  40   1              init_cpu();
  41   1              while(1);
  42   1      
  43   1      
  44   1      }
  45          
  46          void led() interrupt 4
  47          {
  48   1              
  49   1              if(RI==0) return;
  50   1              
  51   1              ES=0;
  52   1              RI=0;
  53   1              //Enable1=0;
  54   1              //Enable2=1;
  55   1              P1=SBUF;
C51 COMPILER V8.02   TEXT2                                                                 05/12/2011 11:33:33 PAGE 2   

  56   1              ES=1;
  57   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     70    ----
   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)