test.lst

单片机开发例子（串口程序） 适合初学者

C51 COMPILER V7.20   TEST                                                                  08/27/2006 10:48:13 PAGE 1   


C51 COMPILER V7.20, COMPILATION OF MODULE TEST
OBJECT MODULE PLACED IN test.OBJ
COMPILER INVOKED BY: d:\Keil\C51\BIN\C51.EXE test.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include "reg52.h"
   2          
   3          
   4          
   5          
   6          void init_serial(void) 
   7                            
   8          {
   9   1                                      //定时器1的工作方式2
  10   1              TMOD=0x20;      //装载计数初值
  11   1              TL1=0xfd;
  12   1              TH1=0xfd;       //采用串口工作方式1，无奇偶校验
  13   1              SCON=0x50;      //串口波特率不加倍
  14   1              PCON=0x00;      //开总中断，开串口中断
  15   1              IE=0x90;        //启动定时器1
  16   1              TR1=1;
  17   1      }
  18          code unsigned char send_txt[]={"测试程序，OK！\n"};
  19          void test_serial(void)
  20          {
  21   1              int i;
  22   1              EA=0;
  23   1              
  24   1              for(i=0;i<sizeof(send_txt);i++)
  25   1              {
  26   2                      SBUF=send_txt[i];
  27   2                      while(TI==0);
  28   2                      TI=0;
  29   2              }
  30   1              EA=1;
  31   1      
  32   1      }
  33          
  34          
  35          
  36          
  37          //中断源编号为4，即串口中断
  38          
  39          void getch(void) interrupt 4 
  40          {
  41   1                      
  42   1              unsigned char a;
  43   1              EA=0;//清除中断标志，硬件置位，软件清零
  44   1              RI=0; 
  45   1                   
  46   1              a=SBUF; //接受串口缓冲区数据
  47   1      
  48   1              if(a==0x0a)
  49   1              {
  50   2                      test_serial();
  51   2              }
  52   1          //通过串口缓冲区向外发送数据
  53   1              //SBUF=a;    
  54   1              //判断是否发送结束：TI＝＝1为结束
  55   1              //while(TI==0); 
C51 COMPILER V7.20   TEST                                                                  08/27/2006 10:48:13 PAGE 2   

  56   1              //发送结束标志清零
  57   1              //TI=0; 
  58   1              EA=1;
  59   1                           
  60   1      }
  61          
  62          main()
  63          {
  64   1              init_serial();
  65   1              test_serial();
  66   1              while(1);               
  67   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    102    ----
   CONSTANT SIZE    =     16    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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