fs20-3.lst

51单片机开发入门与典型实例

C51 COMPILER V7.06   FS20_3                                                                01/08/2007 15:36:34 PAGE 1   


C51 COMPILER V7.06, COMPILATION OF MODULE FS20_3
OBJECT MODULE PLACED IN fs20-3.OBJ
COMPILER INVOKED BY: C:\Keil7.06\C51\BIN\C51.EXE fs20-3.c BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          /* 程文件名：fs20-3.c */
   2          /* 程序功能：救护车声 */
   3          #include <AT89X51.H>  
   4          void delay250(unsigned int k); 
   5          void main(  )           
   6           {
   7   1        unsigned int i,j; 
   8   1          {
   9   2            for(;;)
  10   2                {
  11   3                  while( P2_7==0 )         
  12   3              {
  13   4                    for(i=0;i<2000;i++)
  14   4                  { P3_4=~P3_4;
  15   5                    delay250(2);
  16   5                  }
  17   4                  for(j=0;j<4000;j++)
  18   4                  { P3_4=~P3_4;
  19   5                    delay250(1);
  20   5                  }
  21   4              }
  22   3            }
  23   2          } 
  24   1       }
  25          
  26           /*250μs×k*/ 
  27           void delay250(unsigned int k) 
  28           {  
  29   1        unsigned int j,i;
  30   1       for(i=0;i<k;i++)
  31   1          {
  32   2           for(j=0;j<25;j++); 
  33   2          }
  34   1       } 


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    101    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----       4
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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