alarm.lst

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C51 COMPILER V7.20   ALARM                                                                 01/17/2007 01:04:39 PAGE 1   


C51 COMPILER V7.20, COMPILATION OF MODULE ALARM
OBJECT MODULE PLACED IN Alarm.OBJ
COMPILER INVOKED BY: d:\Keil\C51\BIN\C51.EXE Alarm.C BROWSE DEBUG OBJECTEXTEND

line level    source

   1          /**************************************************
   2          
   3                           蜂鸣器报警实验                                                                 
   4                       http://www.kaifaban.com
   5          
   6          ***************************************************/
   7                             
   8          #include <reg51.h>
   9          #include <intrins.h>
  10          #define uchar unsigned char
  11          sbit SPK=P1^3;   //蜂鸣器连在P1.3
  12          uchar frq; 
  13          //延时子程序
  14          void delayms(uchar ms){                                         
  15   1      uchar i;
  16   1      while(ms--)
  17   1      {
  18   2      for(i=0;i<125;i++);
  19   2      }
  20   1      }
  21          
  22          main(){
  23   1      TMOD=0x01;
  24   1      frq=0x00;
  25   1      TH0=0x00;
  26   1      TL0=0xff;
  27   1      TR0=1;
  28   1      IE=0x82;
  29   1      while(1)
  30   1      {
  31   2      frq++;
  32   2      delayms(1);
  33   2      }
  34   1      }
  35          //定时器0中断程序
  36          void TimeInt() interrupt 1 using 1
  37          {
  38   1      TH0=0xfe;
  39   1      TL0=frq;
  40   1      SPK=~SPK;       
  41   1      }
  42          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     52    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      1    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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