key.lst

这是关于按键显示的基本程序

C51 COMPILER V7.20   KEY                                                                   11/20/2007 08:25:42 PAGE 1   


C51 COMPILER V7.20, COMPILATION OF MODULE KEY
OBJECT MODULE PLACED IN .\KEY.obj
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE ..\PUB\KEY.c BROWSE INCDIR(.\;C:\KEIL\C51\Include) DEBUG OBJECTEXTEND PRINT
                    -(.\KEY.lst) OBJECT(.\KEY.obj)

line level    source

*** WARNING C500 IN LINE 1 OF ..\PUB\KEY.C: MISSING DEVICE (SECURITY KEY NOT FOUND)
   1          /*******************************************************************
   2           *  key.c 
   3           *
   4           *  LCD utility for SST89E58/SST89E516 Experimental BOARD 
   5           *  
   6           *
   7           *  Copyright(C) 2007, Finley ZHU, HUST
   8           *  All rights reserved.
   9           *
  10           *   History
  11           *   2007.11.18  ver 1.00
  12           *
  13           *******************************************************************/
  14          
  15          #include <SST/SST89x5x4.H>
  16          
  17          #include "..\pub\board.h"
  18          #include "key.h"
  19          
  20          char QueryKeyPress(void)
  21          {
  22   1              char    ky1, ky2;
  23   1              while (1) {
  24   2                      ky1 = (P3 & (KEY1|KEY2|KEY3|KEY4));
  25   2                      if (ky1!=(KEY1|KEY2|KEY3|KEY4)) {
  26   3                              Delay5Mss(4);
  27   3                              ky2 = (P3 & (KEY1|KEY2|KEY3|KEY4));
  28   3                              if (ky2==ky1) {
  29   4                                      if ((ky1&KEY1)==0) return KEY1;
  30   4                                      if ((ky1&KEY2)==0) return KEY2;
  31   4                                      if ((ky1&KEY3)==0) return KEY3;
  32   4                                      if ((ky1&KEY4)==0) return KEY4; 
  33   4                              }
  34   3                      }
  35   2              }
  36   1      }
  37          
  38          /************* END of FILE *****************************************/


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     55    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----       1
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


C51 COMPILATION COMPLETE.  1 WARNING(S),  0 ERROR(S)