楼 主:guest 2004年5月17日18:33

 请帮帮我(新手上路)
下面这段程序循环时 TL0 的初值是从0开始的 为什么呢
   
void main()
  { 
    TMOD=0x61;
          IP=0x08; 
       TH0=0x3c;
       TL0=0xB0;
        TH1=252;
        TL1=0xff;
         EA=1;    ET1=1;
         TR0=1;TR1=1;
         for(;;)
                 {  if(will_be_low)
                    { counter1=2;down=1;will_be_low=0;}
                    else 
                    {counter1=3;down=0;will_be_low=1;}
                         do { while(!TF0);
                         TF0=0;
                         TH0=0x3c;
                         TL0=0xB0;
                         }  while(--counter1);
                 }
   }