ex_2.lst

89c52 t2定时器 串口波特率生产与应用

C51 COMPILER V7.50   EX_2                                                                  05/20/2008 14:52:29 PAGE 1   


C51 COMPILER V7.50, COMPILATION OF MODULE EX_2
OBJECT MODULE PLACED IN Ex_2.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE Ex_2.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include "reg52.h"
   2          #define uint    unsigned int
   3          #define uchar   unsigned char
   4          sbit RS485Flag =P1^0;
   5          sbit dooralarm =P1^6;
   6          sbit sw1       =P1^7;
   7          /*void mDelay(uint DelayTime)
   8          {
   9                  uint i;
  10                  for(;DelayTime>0;DelayTime--)
  11                  {
  12                          for(i=0;i<124;i++)
  13                          {;}     
  14                  }
  15          }
  16          */
  17          main()
  18          {
  19   1                      //T2设置
  20   1              RCLK=1;
  21   1              TCLK=1;//选用T2作为串口时钟
  22   1              T2CON=0x30;//选择定时方式
  23   1              TH2=0xFF;  //串口波特率为9600  11.0592MHz   
  24   1              TL2=0xB8;  //6MHz  4800  FFD9
  25   1              RCAP2H = 0xFF;
  26   1              RCAP2L = 0xB8;//11.0592MHz 4800  FFB8
  27   1              ET2=0;
  28   1          ES=1;  //串口中断允许
  29   1              PS=1;  //串口中断优先
  30   1              EA=1;  //总中断
  31   1              TR2=1; //启动T2
  32   1      
  33   1              //串口设置
  34   1              SCON=0x70;              //设置串口位方式1,SM2=1时，接受到有效的停止位，RI才置1
  35   1              PCON=0x00;
  36   1      
  37   1              RS485Flag=0;
  38   1              while(1)
  39   1              {
  40   2                      SBUF=0xFF;
  41   2                      while(TI==0);
  42   2                      TI=0;
  43   2              }
  44   1      }
  45          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     47    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
C51 COMPILER V7.50   EX_2                                                                  05/20/2008 14:52:29 PAGE 2   

END OF MODULE INFORMATION.


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