门铃声发生器.lst

这是本人花了200元买的51开发板上的所有程序资料

C51 COMPILER V8.02   门铃蒧发蒧芲                                                          05/14/2008 19:13:58 PAGE 1   


C51 COMPILER V8.02, COMPILATION OF MODULE 门铃蒧发蒧芲
OBJECT MODULE PLACED IN 门铃声发生器.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE 门铃声发生器.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          //MCU:AT89S51
   2          //晶振：12M
   3          #include "AT89X51.H"
   4          unsigned char time_500hz;
   5          unsigned char time_700hz;
   6          unsigned int tcount;
   7           
   8          bit stop;
   9          bit flag;
  10           
  11          void main(void)
  12          {
  13   1        unsigned char i,j;
  14   1       
  15   1        TMOD=0x02;  //使用定时器0，选择方式2（常数自动重装的8位定时器）
  16   1        TH0=0x06;   //保存数值，用于自动重装
  17   1        TL0=0x06;  //定时250uS初值
  18   1        TR0=1;    //开定时器0
  19   1        ET0=1;    //开定时器0溢出中断
  20   1        EA=1;     //开总中断
  21   1        P2_6=0;
  22   1       
  23   1        while(1)
  24   1          {
  25   2            if(P2_0==0)
  26   2              {
  27   3                for(i=10;i>0;i--)
  28   3                for(j=248;j>0;j--);
  29   3                if(P2_0==0)
  30   3                  {
  31   4                    time_500hz=0;
  32   4                    time_700hz=0;
  33   4                    tcount=0;
  34   4                    flag=0;
  35   4                                stop=0;
  36   4                    TR0=1;
  37   4                    while(stop==0);
  38   4                  }
  39   3              }
  40   2          }
  41   1      }
  42          
  43          /********250uS中断服务程序*************/
  44          void t0(void) interrupt 1 using 0
  45          {
  46   1        tcount++;
  47   1        if(tcount==2500)
  48   1          {
  49   2            tcount=0;
  50   2            if(flag==0)
  51   2              {
  52   3                flag=~flag;
  53   3              }
  54   2              else
  55   2                {
C51 COMPILER V8.02   门铃蒧发蒧芲                                                          05/14/2008 19:13:58 PAGE 2   

  56   3                  stop=1;
  57   3                  TR0=0;
  58   3                }
  59   2          }
  60   1        if(flag==0)
  61   1          {
  62   2            time_700hz++;
  63   2            if(time_700hz==3)
  64   2              {
  65   3                time_700hz=0;
  66   3               P2_6=~P2_6;
  67   3              }
  68   2          }
  69   1          else
  70   1            {
  71   2              time_500hz++;
  72   2              if(time_500hz==4)
  73   2                {
  74   3                  time_500hz=0;
  75   3                  P2_6=~P2_6;
  76   3                }
  77   2            }
  78   1      }
  79          
  80          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    122    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      4    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =      2    ----
END OF MODULE INFORMATION.


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