main.lst

基于单片机at89c51的mp3定时器设置及中断实验源代码

C51 COMPILER V7.50   MAIN                                                                  01/15/2006 18:18:25 PAGE 1   


C51 COMPILER V7.50, COMPILATION OF MODULE MAIN
OBJECT MODULE PLACED IN main.OBJ
COMPILER INVOKED BY: d:\Keil\C51\BIN\C51.EXE main.c

line level    source

   1          #include "AT89C51SND1_REG.H"
   2          
   3          #define LED          P3_5
   4          
   5          unsigned char Counter=0;
   6          
   7          
   8          void Timer0_ISR() interrupt     1  //Vector addr 0x002b
   9          {
  10   1              TR0 = 0;   //停止T0
  11   1              TH0 = 0x5d;
  12   1          TL0 = 0x3d;
  13   1              Counter++;
  14   1              if(Counter==40)   
  15   1                      {
  16   2                              Counter=0;
  17   2                              LED=~LED;
  18   2                      }
  19   1              TR0 = 1; //重启T0
  20   1      }
  21          
  22          main()
  23          {
  24   1              CKCON|= 0x02;
  25   1              TMOD &= 0xf0;
  26   1              TMOD |= 0x01; //设置T0为模式1定时器
  27   1              TH0 = 0x5d;
  28   1              TL0 = 0x3d;
  29   1              ET0 =1;//打开T0中断
  30   1              EA = 1;//打开中断
  31   1              TR0=1; //启动定时器T0
  32   1              while(1); 
  33   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     54    ----
   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)