fmq.lst

MCS51外部中断1和定时器T0的应用

C51 COMPILER V7.50   FMQ                                                                   08/20/2008 10:04:19 PAGE 1   


C51 COMPILER V7.50, COMPILATION OF MODULE FMQ
OBJECT MODULE PLACED IN FMQ.OBJ
COMPILER INVOKED BY: D:\Keil\C51\BIN\C51.EXE FMQ.C BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include "reg52.h"
   2          #include "intrins.h"
   3          unsigned char f=0;
   4          sbit  beep=P3^4;
   5          sbit  key=P3^2;
   6          unsigned int timer=0;
   7          void delay(unsigned int dly)
   8             {
   9   1          while(dly--)
  10   1               {
  11   2                _nop_();
  12   2                _nop_();
  13   2                _nop_();
  14   2                _nop_();
  15   2               }
  16   1        }
  17          
  18          void int0(void) interrupt 2//外部1中断处理程序
  19          {
  20   1        EX1=1; //关外部中断
  21   1        TR0=0;
  22   1        delay(0x1ff);//延时去抖动
  23   1        while(key==0);
  24   1        f+=1;//如果有按键按下，定时初值自动加1
  25   1        TH0=f;
  26   1        TL0=f;//TL0
  27   1        TR0=1;
  28   1        EX1=1;
  29   1      }
  30          void timer0() interrupt 1
  31          {   ET0=0;//开总中断
  32   1              timer++; 
  33   1          ET0=1;//开总中断
  34   1      }
  35          void initport(void) //初始化外部中断1
  36          {
  37   1      IT1=1;//下降沿触发
  38   1      EA=1;//开总中断
  39   1      EX1=1;//开外部中断1
  40   1      }
  41          void main(void)
  42          {   
  43   1          TMOD=0X02;//定时器0，工作方式2自动重装初值
  44   1              initport();//初始化外部中断1
  45   1              TH0=f;
  46   1              TL0=f;//TL0     
  47   1              TR0=1; //启动定时器0
  48   1          EA=1;//开总中断
  49   1              ET0=1;//开定时器0中断
  50   1              
  51   1      while(1)
  52   1          {     if(timer==1)
  53   2                  {
  54   3                               timer=0;
  55   3                           beep=~beep; //如果定时时间到，将P3^4端口取反
C51 COMPILER V7.50   FMQ                                                                   08/20/2008 10:04:19 PAGE 2   

  56   3                              }
  57   2          }
  58   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    125    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      3    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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