text1.lst

单片机快速入门原程序

C51 COMPILER V7.50   TEXT1                                                                 05/27/2006 00:17:10 PAGE 1   


C51 COMPILER V7.50, COMPILATION OF MODULE TEXT1
OBJECT MODULE PLACED IN Text1.OBJ
COMPILER INVOKED BY: e:\Keil\C51\BIN\C51.EXE Text1.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include <reg51.h>
   2          #include<stdio.h>
   3          Uart_Init();
   4          int nKeyNumber;
   5          char nRxByte;
   6          char Interrupt_Flag;
   7          sbit P10=0x90;
   8          sbit P32=0xB2;
   9          sbit P33=0xB3;
  10          void GetKeyFromRxByte();
  11          main()
  12          {       nKeyNumber=0xFF;
  13   1              Uart_Init();    
  14   1              EX0=1;
  15   1              EX1=1;
  16   1              ES=1;
  17   1              EA=1;
  18   1              Uart_Init();
  19   1              while(1)
  20   1              {
  21   2                      if(nKeyNumber==0xFF) ;
  22   2                              //printf("No key pressed\n");
  23   2                      else 
  24   2                              {       printf("key %d  Pressed\n",nKeyNumber);
  25   3                                      nKeyNumber=0xFF;
  26   3                                      }
  27   2              }
  28   1      }
  29          void int0() interrupt 0 using 0
  30          {               P10=1;
  31   1                      P10=0;
  32   1      Interrupt_Flag=0;
  33   1      }
  34          void int1() interrupt 2 using 0
  35          {               P10=1;
  36   1                      P10=0;
  37   1      Interrupt_Flag=1;
  38   1      }
  39          void Serial_Port() interrupt 4 using 0
  40          {       if(RI==1)
  41   1              {
  42   2              nRxByte=SBUF;
  43   2              GetKeyFromRxByte();
  44   2              }
  45   1              TI=0;
  46   1              RI=0;
  47   1      }
  48          void GetKeyFromRxByte()
  49          {int i,ntemp;
  50   1      for(i=0;i<8;i++)
  51   1              if(((nRxByte>>i)&0x01)==0) 
  52   1                      {ntemp=i;
  53   2                      nKeyNumber=ntemp+8*Interrupt_Flag;
  54   2                      return;
  55   2                      }
C51 COMPILER V7.50   TEXT1                                                                 05/27/2006 00:17:10 PAGE 2   

  56   1              
  57   1      }
  58          Uart_Init()
  59                  {SCON = 0x52;    /* 设置串行口控制寄存器SCON*/
  60   1               TMOD = 0x20;    /* 12M时钟时波特率为2400  */
  61   1               TCON = 0x69;    /* TCON */
  62   1               TH1 =  0xf3;    /* TH1 */
  63   1              }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    177    ----
   CONSTANT SIZE    =     17    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      4    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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