text1.lst

单片机快速入门原程序

C51 COMPILER V7.50   TEXT1                                                                 05/26/2006 21:23:25 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          sbit P10=0x90;
   6          sbit P11=0x91;
   7          sbit P12=0x92;
   8          sbit P13=0x93;
   9          sbit P14=0x94;
  10          sbit P15=0x95;
  11          sbit P16=0x96;
  12          sbit P17=0x97;
  13          main()
  14          {       nKeyNumber=0xFF;
  15   1              P10=0;
  16   1              P11=0;
  17   1              P12=0;
  18   1              P13=0;
  19   1              EX0=1;
  20   1              EA=1;
  21   1              Uart_Init();
  22   1              while(1)
  23   1              {       EX0=1;
  24   2                      if(nKeyNumber==0xFF) ;
  25   2                              //printf("No key pressed\n");
  26   2                      else 
  27   2                              {
  28   3                                      printf("key %d  Pressed\n",nKeyNumber);
  29   3                                      nKeyNumber=0xFF;
  30   3                                      }
  31   2                                      
  32   2                              
  33   2      
  34   2              }
  35   1      }
  36          
  37          Uart_Init()
  38                  {SCON = 0x52;    /* 设置串行口控制寄存器SCON*/
  39   1               TMOD = 0x20;    /* 12M时钟时波特率为2400  */
  40   1               TCON = 0x69;    /* TCON */
  41   1               TH1 =  0xf3;    /* TH1 */
  42   1              }
  43          
  44          void int0() interrupt 0 using 0
  45          {
  46   1      int i,j;
  47   1      int Pin1;       
  48   1              EX0=0;            /* 关中断*/
  49   1      for(i=0;i<4;i++)
  50   1              for(j=0;j<4;j++)
  51   1                      {
  52   2              P1=0xFF&(~(0x01<<(3-i)));
  53   2                      Pin1=P1;
  54   2                              if(((Pin1>>(4+j))&0x01)==0)
  55   2                                      {nKeyNumber=i+j*4;
C51 COMPILER V7.50   TEXT1                                                                 05/26/2006 21:23:25 PAGE 2   

  56   3                                      return;
  57   3                              
  58   3                                      }
  59   2                      }
  60   1      EX0=1;
  61   1      
  62   1      
  63   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    175    ----
   CONSTANT SIZE    =     17    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      2    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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