蜂鸣器.lst

单片机c语言 用于DY500或同类型的开发板

C51 COMPILER V7.06   __鸣器                                                                08/21/2008 09:52:28 PAGE 1   


C51 COMPILER V7.06, COMPILATION OF MODULE __鸣器
OBJECT MODULE PLACED IN 蜂鸣器.OBJ
COMPILER INVOKED BY: d:\Keil2\C51\BIN\C51.EXE 蜂鸣器.c BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1             
   2          /*copyright 2007,ShangHai  HaoTun Electronic Technology co.,Ltd
   3           *
   4           *This sample is used for Speaker.
   5           *
   6           *write by Shifang 2007-4-23
   7           *
   8           *V1.1
   9           */
  10          #include<reg52.h>
  11          
  12          sbit SPK=P1^6;//定义蜂鸣器端口
  13          
  14          
  15          void delay(unsigned int cnt)//延时
  16          {
  17   1       while(--cnt);
  18   1      }
  19          
  20          main()
  21          {
  22   1      unsigned int i;
  23   1       while(1)
  24   1            {
  25   2                 for(i=0;i<200;i++)//喇叭发声的时间循环，改变大小可以改变发声时间长短
  26   2                {
  27   3                delay(80);//参数决定发声的频率，估算值
  28   3                SPK=!SPK;
  29   3                }
  30   2             SPK=1;        //喇叭停止工作，间歇的时间，可更改
  31   2             delay(20000);
  32   2                
  33   2                }
  34   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     44    ----
   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)