keyscan.lst

这是一个用于视频切换的控制程序,采用AT89C51芯片,KEIL 51开发

C51 COMPILER V7.01  KEYSCAN                                                                10/15/2004 15:20:38 PAGE 1   


C51 COMPILER V7.01, COMPILATION OF MODULE KEYSCAN
OBJECT MODULE PLACED IN keyscan.OBJ
COMPILER INVOKED BY: d:\Keil\C51\BIN\C51.EXE keyscan.c BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          
   2          //scan the Alarm input
   3          #include "reg52.h"
   4          #include "main.h"
   5          
   6          
   7          
   8          unsigned char data keydata;
   9          extern keybuffer;
  10          
  11          unsigned char keyscan(void)
  12          {
  13   1       unsigned char data keytmp;
  14   1       keydata=0;
  15   1       COLUMN1_PIN = 0;
  16   1       COLUMN2_PIN = 1;
  17   1       COLUMN3_PIN = 1;
  18   1       keytmp = ~(P1) & 0x0f;
  19   1      
  20   1       switch(keytmp)
  21   1        {
  22   2         case 1:
  23   2           keydata = key1;
  24   2               break;
  25   2         case 2:
  26   2           keydata = key2;
  27   2               break;
  28   2         case 4:
  29   2           keydata = key3;
  30   2               break;
  31   2         case 8:
  32   2           keydata = key4;
  33   2               break;
  34   2         default:
  35   2           break;
  36   2        }
  37   1      
  38   1       COLUMN1_PIN = 1;
  39   1       COLUMN2_PIN = 0;
  40   1       COLUMN3_PIN = 1;
  41   1       keytmp = ~(P1) & 0x0f;
  42   1      
  43   1       switch(keytmp)
  44   1       {
  45   2         case 1:
  46   2           keydata = key5;
  47   2               break;
  48   2         case 2:
  49   2           keydata = key6;
  50   2               break;
  51   2         case 4:
  52   2           keydata = key7;
  53   2               break;
  54   2         case 8:
  55   2           keydata = key8;
C51 COMPILER V7.01  KEYSCAN                                                                10/15/2004 15:20:38 PAGE 2   

  56   2               break;
  57   2         default:
  58   2           break;
  59   2        }
  60   1      
  61   1       COLUMN1_PIN = 1;
  62   1       COLUMN2_PIN = 1;
  63   1       COLUMN3_PIN = 0;
  64   1       keytmp = ~(P1) & 0x0f;
  65   1      
  66   1       switch(keytmp)
  67   1        {
  68   2         case 1:
  69   2           keydata = key9;
  70   2               break;
  71   2         case 2:
  72   2           keydata = key10;
  73   2               break;
  74   2         case 4:
  75   2           keydata = key11;
  76   2               break;
  77   2         case 8:
  78   2           keydata = key12;
  79   2               break;
  80   2         default:
  81   2           break;
  82   2        }
  83   1        COLUMN3_PIN=1;
  84   1        return keydata;
  85   1      }
  86          
  87          
  88          
  89          
  90          
  91          
  92          
  93          
  94          
  95          
  96          
  97          
  98          
  99          
 100          
 101          
 102          
 103          
 104          
 105          
 106          
 107          
 108          
 109          
 110          
 111          
 112          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    143    ----
   CONSTANT SIZE    =   ----    ----
C51 COMPILER V7.01  KEYSCAN                                                                10/15/2004 15:20:38 PAGE 3   

   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      1    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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