关于IO引脚问题

lingdongwoxin

大家看看这段程序 #include <hidef.h>      /* common defines and macros */
#include "derivative.h"      /* derivative-specific definitions */

void main(void)
{
  /* put your own code here */
EnableInterrupts;
   DDRB=0x01;
   PORTB_PB0=0;
   if(PORTB_PB1==0)
   PORTB_PB0=1;
      
   
  for(;;) {
    _FEED_COP(); /* feeds the dog */
  } /* loop forever */
  /* please make sure that you never leave main */现在我把脚 PORTB_PB1=0但PORTB_PB0不等于1
}