rs232_display.lst

串口通信实用程序,适合初学者做串口通信实验,

C51 COMPILER V7.07   RS232_DISPLAY                                                         02/15/2007 15:21:22 PAGE 1   


C51 COMPILER V7.07, COMPILATION OF MODULE RS232_DISPLAY
OBJECT MODULE PLACED IN RS232_display.OBJ
COMPILER INVOKED BY: D:\Program Files\keil\C51\BIN\C51.EXE RS232_display.c BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          //RS232接收显示实验
   2          #include "reg51.h"              
   3          
   4          unsigned char code tab[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};
   5          
   6          unsigned char dat;                              //定义全局变量
   7          
   8          //串行口初始化程序
   9          void Init_Com(void)
  10          {
  11   1           TMOD = 0x20;
  12   1           PCON = 0x00;
  13   1           SCON = 0x50;                       
  14   1           TH1 = 0xFd;
  15   1           TL1 = 0xFd;
  16   1           TR1 = 1;                           
  17   1      }
  18          
  19          //LED数码管延时程序
  20          void delay(void)
  21          {
  22   1              int k;
  23   1              for(k=0;k<600;k++);
  24   1      }
  25          
  26          //串行中断服务程序
  27          serial()interrupt 4 using 1
  28          {
  29   1              if(RI)
  30   1              RI=0;
  31   1              dat=SBUF;
  32   1      }
  33          
  34          //LED数码管显示程序
  35          void display(int k)
  36          {
  37   1              P2=0xfe;                                                                //位选                  
  38   1              P0=tab[k/1000];                                                 //显示千位数字
  39   1              delay();                                                                //延时
  40   1              P2=0xfd;                                                                //位选
  41   1              P0=tab[k%1000/100];                                             //显示百位数字
  42   1              delay();                                                                //延时
  43   1              P2=0xfb;                                                                //位选
  44   1              P0=tab[k%100/10];                                               //显示十位数字
  45   1              delay();                                                                //延时
  46   1              P2=0xf7;                                                                //位选
  47   1              P0=tab[k%10];                                                   //显示个位数字
  48   1              delay();                                                                //延时
  49   1              P2=0xff;                                                                //位选
  50   1      }
  51          
  52          //主程序
  53          void main()
  54          {   
  55   1              P2=0xff;
C51 COMPILER V7.07   RS232_DISPLAY                                                         02/15/2007 15:21:22 PAGE 2   

  56   1              P0=0xff;
  57   1              P1=0xff;
  58   1              EA=1;
  59   1              ES=1;
  60   1              Init_Com();
  61   1              while(1)
  62   1         {
  63   2            display(dat);                                                     //显示数据
  64   2         }
  65   1      }
  66          
  67          
  68          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    177    ----
   CONSTANT SIZE    =     10    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      1    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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