speaker.lst

QH_MCU_V1.1单片机C源码. 内含实验程序 这是修改版.

C51 COMPILER V7.07   SPEAKER                                                               09/21/2007 13:43:07 PAGE 1   


C51 COMPILER V7.07, COMPILATION OF MODULE SPEAKER
OBJECT MODULE PLACED IN speaker.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE speaker.c BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          #include <REG51.H>
   2          #include <sys.h>
   3          #include <intrins.h>
   4          //说明：本实验是当串口接收到0xac后，蜂鸣器开始鸣叫，收到其它数据则停止鸣叫，串口的波特率是19200。
   5          bit  read_flag = 0;
   6          void delay ();
   7          void ISRSER() interrupt 4 using 3
   8            {
   9   1          uchar a;
  10   1               
  11   1        if (RI)
  12   1          {
  13   2                  
  14   2             RI = 0;
  15   2                 a = SBUF;
  16   2            if (a==0xac)
  17   2                 read_flag = 1;
  18   2                else 
  19   2                  read_flag = 0;
  20   2                SBUF=a;
  21   2            while(TI==0);
  22   2              TI=0;
  23   2          }
  24   1      
  25   1      
  26   1        }
  27          
  28          void speaker1()
  29            {
  30   1           delay ();
  31   1           P2 = 0x10;
  32   1           P0 = 0xf7;
  33   1           P2 = 0x00;
  34   1           P2 = 0x80;
  35   1           P0 = 0x01;
  36   1                 delay ();
  37   1           P0 = 0x00;
  38   1           P2 = 0x00;
  39   1         }
  40          void main()
  41          {
  42   1              P2 = 0x00;
  43   1              P0 = 0x00;
  44   1        delay();
  45   1              SCON |= 0x50;  /* mode 1: 8-bit UART, enable receiver */ 
  46   1              TMOD |= 0x20; /* timer 1 mode 2: 8-Bit reload */ 
  47   1              PCON |= 0x80; // baud x2
  48   1              TH1 = 0xfd;   //串口初始化 0xfd=19200,0xfa=9600,0xf4=4800,0xe8=2400,0xd0=1200  
  49   1              TR1 = 1;
  50   1              EA = 1;
  51   1              ES = 1;  // Turn on Series Interrupte;
  52   1      
  53   1      
  54   1      
  55   1              while(1)
C51 COMPILER V7.07   SPEAKER                                                               09/21/2007 13:43:07 PAGE 2   

  56   1              {
  57   2      
  58   2                   if (read_flag==1) 
  59   2      
  60   2                         {
  61   3                 
  62   3                          speaker1();
  63   3                      
  64   3                         }
  65   2         
  66   2      
  67   2              }
  68   1      }
  69          
  70          void delay()
  71          {
  72   1          uchar i = 0;
  73   1              uchar j = 0;
  74   1        for (j=0;j<255;j++)
  75   1         {
  76   2          for (i=0; i<250; i++)
  77   2                ;
  78   2         }
  79   1      }
  80          
  81          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    105    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =      1    ----
END OF MODULE INFORMATION.


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