rs232.lst

一块实用51开发板的原理图和所以基于keil c的源代码

C51 COMPILER V6.23a  RS232                                                                 04/06/2005 10:34:54 PAGE 1   


C51 COMPILER V6.23a, COMPILATION OF MODULE RS232
OBJECT MODULE PLACED IN Rs232.OBJ
COMPILER INVOKED BY: C:\TOOLS\Keil\C51\BIN\C51.EXE Rs232.c BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          /*实验名称：RS232通信实验
   2           功能:接收电脑送过来的数据,并且显示16进制数,并将数据回传到电脑
   3            作者：http://www.mcuprog.com
   4                  05-02-01
   5          */
   6          #include <reg51.h>
   7          //LCD的口线
   8          sbit E=P3^5;
   9          sbit RW=P3^6;
  10          sbit RS=P3^7;   
  11          //8字LED的连接方法
  12          //P0.7  P.06    P0.5    P0.4    P0.3    P0.2    P0.1    P0.0
  13          // H      G      F       E       D       C       B       A
  14          
  15          unsigned char recdata;                  //RS232收到的值
  16          unsigned char code ledcode[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,  
  17                                        0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e}; //数码管段码表
  18          
  19          void Delay_ms(unsigned int t); //延时 t秒钟 ：fosc=12MHz
  20          void rs232(void);
  21          
  22          void main(void)
  23          {
  24   1              E=0;                    //取消LCD对LED的影响
  25   1              RW=0;
  26   1              RS=1;
  27   1              
  28   1              TMOD=0x20;
  29   1              TH1=0xfd;
  30   1              TL1=0xfd;
  31   1              SCON=0x50;
  32   1              TR1=1;
  33   1              REN=1;
  34   1              IE=0x90;
  35   1              while(1)
  36   1              {
  37   2                      P2=0xff;                //关显示
  38   2                      P0=ledcode[(recdata>>4)&0x0f];
  39   2                      P2=0xfe;
  40   2                      Delay_ms(1);
  41   2      
  42   2                      P2=0xff;
  43   2                      P0=ledcode[recdata&0x0f];
  44   2                      P2=0xfd;
  45   2                      Delay_ms(1);
  46   2              }
  47   1      }
  48          
  49          //以下为串口中断程序
  50          void rs232(void) interrupt 4
  51          {
  52   1              if(RI==1)
  53   1              {
  54   2                      RI=0;
  55   2                      recdata=SBUF;
C51 COMPILER V6.23a  RS232                                                                 04/06/2005 10:34:54 PAGE 2   

  56   2                      SBUF=recdata;
  57   2              }
  58   1              else
  59   1              {
  60   2                      TI=0;
  61   2              }
  62   1      }
  63          
  64          void Delay_ms(unsigned int t)   //Delay t ms for 12MHz crystal
  65          {unsigned char i;
  66   1       while(t--)
  67   1              {for(i=0;i<125;i++);
  68   2              }
  69   1      }
  70                  


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    120    ----
   CONSTANT SIZE    =     16    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      1    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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