keyboard.lst

数字频率合成器DDS9851控制系统的单片机源代码

C51 COMPILER V7.07   KEYBOARD                                                              05/15/2008 21:40:04 PAGE 1   


C51 COMPILER V7.07, COMPILATION OF MODULE KEYBOARD
OBJECT MODULE PLACED IN keyboard.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE keyboard.c BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          ////////////////////////////////////////////////////////////////////////////
   2          //////////////////////////////
   3          //        0   1   2                 P1^n//
   4          //----------------- 3 ///////
   5          //        |       |       |               ///
   6          //----------------- 4 ///
   7          //        |       |   |           //
   8          //----------------- 5 ///
   9          //        |       |       |               //
  10          //----------------- 6 ///
  11          ////////////////////////
  12          //////////////////////////
  13          ////////////////////////////////////////////////////////////////////////////
  14          #include <reg52.h>
  15          
  16          #define         keyboard        P1                       //管脚定义
  17          
  18          extern  void    delay_ms(unsigned char time);
  19          
  20          unsigned char check_key(void)    //按纽检查函数，返回键码  取消（10）  确认（11）
  21          {
  22   1        unsigned char readkey;
  23   1        unsigned char xtemp,ytemp;
  24   1        while(1)
  25   1        {
  26   2              keyboard = 0x07;
  27   2              xtemp = keyboard & 0x07;
  28   2              if(xtemp == 0x07) continue;
  29   2              keyboard = 0xf8;
  30   2              ytemp = keyboard & 0xf8;
  31   2              readkey = xtemp | ytemp;
  32   2              readkey =~readkey;
  33   2      
  34   2              switch(readkey)
  35   2              {
  36   3                      case 0x09: readkey = 1;break;
  37   3                      case 0x0a: readkey = 2;break;
  38   3                      case 0x0c: readkey = 3;break;
  39   3                      case 0x11: readkey = 4;break;
  40   3                      case 0x12: readkey = 5;break;
  41   3                      case 0x14: readkey = 6;break;
  42   3                      case 0x21: readkey = 7;break;
  43   3                      case 0x22: readkey = 8;break;
  44   3                      case 0x24: readkey = 9;break;
  45   3                      case 0x41: readkey = 10;break;
  46   3                      case 0x42: readkey = 0;break;
  47   3                      case 0x44: readkey = 11;break;
  48   3              }
  49   2              keyboard = 0x07;
  50   2              while(keyboard != 0x07);                //等待按纽松开
  51   2              return readkey;
  52   2        }
  53   1      }


C51 COMPILER V7.07   KEYBOARD                                                              05/15/2008 21:40:04 PAGE 2   

MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    139    ----
   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)