key-led.lst

单片机C语言程序设计实训100例

C51 COMPILER V8.08   KEY_LED                                                               08/10/2009 09:01:53 PAGE 1   


C51 COMPILER V8.08, COMPILATION OF MODULE KEY_LED
OBJECT MODULE PLACED IN key-led.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE key-led.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include <reg52.h>
   2          #define uchar unsigned char
   3          #define uint unsigned int
   4          
   5          void DelayMS(uint x)
   6          {
   7   1              uchar t;
   8   1              while(x--)
   9   1              {
  10   2                      for(t=0;t<120;t--);
  11   2              }
  12   1      }
  13          
  14          void main()
  15          {
  16   1              uchar k,t,Key_State;
  17   1              P0 = 0xff;
  18   1              P1 = 0xff;
  19   1              while(1)
  20   1              {
  21   2                      t = P1;
  22   2                      {
  23   3                              DelayMS(10);
  24   3                              if(t != P1)
  25   3                                      continue;
  26   3                              Key_State = ~t >> 4;
  27   3                              k = 0;
  28   3                              while(Key_State != 0)
  29   3                              {
  30   4                                      k++;
  31   4                                      Key_State >>= 1;
  32   4                              }
  33   3                              switch(k)
  34   3                              {
  35   4                                      case 1: if(P0 == 0x00)
  36   4                                                      P0 = 0xff;
  37   4                                                      P0 <<= 1;
  38   4                                                      DelayMS(200);
  39   4                                                      break;
  40   4                                      case 2: P0 = 0xf0;
  41   4                                                      break;
  42   4                                      case 3: P0 = 0x0f;
  43   4                                                      break;
  44   4                                      case 4: P0 = 0xff;
  45   4                              }
  46   3                      }
  47   2              }
  48   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    110    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
C51 COMPILER V8.08   KEY_LED                                                               08/10/2009 09:01:53 PAGE 2   

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


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