main_ex3.lst

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C51 COMPILER V8.02   MAIN_EX3                                                              01/05/2007 12:17:30 PAGE 1   


C51 COMPILER V8.02, COMPILATION OF MODULE MAIN_EX3
OBJECT MODULE PLACED IN main_ex3.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE main_ex3.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          // P3口外接的键盘控制P1外接的LED显示
   2          #include <REGX51.H>
   3          #define LEDCOM P2_4 //LED公共端
   4          #define LEDZXM P0       //LED的显示控制端
   5          
   6          #define KEY1 P2_4    //按键输入端
   7          #define KEY2 P2_5    //按键输入端
   8          #define KEY3 P2_6    //按键输入端
   9          #define KEY4 P2_7    //按键输入端
  10          
  11          extern void delay(unsigned int i);
  12          
  13          ex3( )  // C语言的主函数
  14          {
  15   1        unsigned char LED,tmp;  
  16   1        LED = 0xff; // 关LED显示
  17   1        while(1){     
  18   2           P2 |=0xf0; //选通键盘输入端  
  19   2               tmp = (P2>>4);
  20   2               P2 = 0x00;              
  21   2               if(tmp != 0x0f) LED = tmp | 0xf0;
  22   2               LEDCOM =1;              
  23   2               LEDZXM = LED; // 键盘状态送LED显示
  24   2               delay(100);     
  25   2        }
  26   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     39    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----       1
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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