up51s002.lst

此代码为警报声程序

C51 COMPILER V7.08   UP51S002                                                              12/12/2004 20:45:38 PAGE 1   


C51 COMPILER V7.08, COMPILATION OF MODULE UP51S002
OBJECT MODULE PLACED IN uP51s002.OBJ
COMPILER INVOKED BY: C:\KEIL\C51\BIN\C51.EXE uP51s002.C BROWSE DEBUG OBJECTEXTEND

line level    source

   1          /*******************************************************************************
   2          *                                                                              *
   3          *    File       : uP51s002.asm                                                 *
   4          *    Date       : 2004-9-5                                                     *
   5          *    Version    : 1.0                                                          *
   6          *                                                                              *
   7          *    Author     : kevin           [e-mail]                               *
   8          *    Company    : Http://www.dz51.com                                          *
   9          *                                                                              *
  10          ********************************************************************************
  11          *    Descriptoon:                                                              *
  12          *                报警声程序                                                    *
  13          *                                                                              *
  14          *                                                                              *
  15          *                                                                              *
  16          *                                                                              *
  17          *                                                                              *
  18          *******************************************************************************/
  19          #include <reg51.h>
  20          #include <intrins.h>
  21          
  22          sbit    SPK = P3^7;
  23          
  24          unsigned char frq; 
  25          
  26          void delayms(unsigned char ms);
  27          
  28          main()
  29          {
  30   1              TMOD = 0x01;
  31   1              frq = 0x00;
  32   1              TH0 = 0x00;
  33   1              TL0 = 0xff;     
  34   1              TR0 = 1;
  35   1              IE = 0x82;
  36   1              
  37   1              while(1)
  38   1              {
  39   2                      frq++;
  40   2                      delayms(1);
  41   2              }
  42   1      }
  43          
  44          void timer0() interrupt 1 using 1
  45          {
  46   1              TH0 = 0xfe;
  47   1              TL0 = frq;
  48   1              SPK = ~SPK;     
  49   1      }
  50          
  51          void delayms(unsigned char ms)  
  52          // 延时子程序
  53          {                                               
  54   1              unsigned char i;
  55   1              while(ms--)
C51 COMPILER V7.08   UP51S002                                                              12/12/2004 20:45:38 PAGE 2   

  56   1              {
  57   2                      for(i = 0; i < 120; i++);
  58   2              }
  59   1      }


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)