onebutton.lst

涉及51单片机上LED灯

C51 COMPILER V7.09   ONEBUTTON                                                             05/24/2004 20:28:24 PAGE 1   


C51 COMPILER V7.09, COMPILATION OF MODULE ONEBUTTON
OBJECT MODULE PLACED IN onebutton.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE onebutton.c ROM(SMALL) BROWSE DEBUG OBJECTEXTEND TABS(2)

line level    source

   1          #include <AT89x51.h>
   2          
   3          void main(void)
   4          {
   5   1        unsigned int a;
   6   1        do
   7   1        {
   8   2          P1 = 0xFF; //关闭P1上的LED
   9   2          while(P3_7); //空语句，等待P3_7按下为低电平，低电平时执行下面的语句
  10   2          P1 = 0; //点亮LED
  11   2          for(;a<60000;a++); //这也是空语句的用法,注意a的初值为当前值
  12   2        } //这样第一次按下时会有一延时点亮一段时间，以后按多久就亮多久
  13   1        while(1); //点亮一段时间后关闭再次判断P3_7,如此循环
  14   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     37    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----       2
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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