keypad.lst

lcd1286显示模块 EWB Quartus2编译 电子综合设计试验箱程序

C51 COMPILER V7.50   KEYPAD                                                                08/22/2008 20:40:13 PAGE 1   


C51 COMPILER V7.50, COMPILATION OF MODULE KEYPAD
OBJECT MODULE PLACED IN keypad.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE keypad.c LARGE BROWSE DEBUG OBJECTEXTEND

line level    source

   1          # include "keypad.h"
   2          #include  "serial.h"
   3          unsigned char KeypadScan(void)//得到4×4键盘的键值，没有按键时返回0xff
   4          {
   5   1          unsigned char keycode=0xff,temp,i,tmp=0x07;
   6   1          KEYPAD_OUT=0x00;
   7   1              temp=KEYPAD_IN&0x0f; 
   8   1              if(temp!=0x0f)              //有键按下
   9   1              {
  10   2                      //Delay(10);
  11   2                      //PrintStr("key\n");
  12   2                  KEYPAD_OUT=0x07;
  13   2                  for(i=0;i<4;i++)
  14   2                      {
  15   3                              temp=KEYPAD_IN&0x0f;
  16   3                  if(temp==0x07)
  17   3                      {    
  18   4                                  keycode=i*4;
  19   4                                      break;
  20   4                              }
  21   3                      else if(temp==0x0b)
  22   3                              {
  23   4                          keycode=i*4+1;
  24   4                                      break;
  25   4                              }
  26   3                  else if(temp==0x0d)
  27   3                              {
  28   4                          keycode=i*4+2;
  29   4                                      break;
  30   4                              }
  31   3                  else if(temp==0x0e)
  32   3                              {
  33   4                          keycode=i*4+3;
  34   4                                      break;
  35   4                              }
  36   3                              tmp=(tmp>>1)|0x8;
  37   3                              KEYPAD_OUT=tmp;
  38   3                      }
  39   2      
  40   2                   while((KEYPAD_IN&0x0f)!=0x0f)   //等待释放
  41   2                       {
  42   3                           KEYPAD_OUT=0x00; 
  43   3                       }                                                                           
  44   2                  
  45   2               }
  46   1               return keycode;
  47   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    115    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----    ----
C51 COMPILER V7.50   KEYPAD                                                                08/22/2008 20:40:13 PAGE 2   

   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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