蜂鸣器 响.lst

蜂鸣器响 改变蜂鸣器的频率

C51 COMPILER V7.50   蜂胈芲_响                                                             02/17/2009 15:31:27 PAGE 1   


C51 COMPILER V7.50, COMPILATION OF MODULE 蜂胈芲_响
OBJECT MODULE PLACED IN 蜂鸣器 响.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE 蜂鸣器 响.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include<reg52.h>
   2          sbit speaker=P1^4;
   3          void delay(int x,int y) ;
   4          main()
   5          {
   6   1              while (1)
   7   1              {
   8   2                      speaker=1;
   9   2                      delay(1,20);
  10   2                      speaker=0;
  11   2                      delay(1,20);
  12   2              }
  13   1      
  14   1      }
  15          void delay(int x,int y) //延时子函数2  从网上抄的  可以用
  16          { 
  17   1      unsigned int a,b; 
  18   1      for(a=x;a>0;a--) 
  19   1      for(b=y;b>0;b--); 
  20   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     57    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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