请问各位大神我这个能实现用PB0 PB1的输入来控制PA的输出吗？

朱琳 · 发表于 2013-7-23 14:11:37

#include <hidef.h>    /* common defines and macros */
#include "derivative.h"    /* derivative-specific definitions  */
void PLL_Init(void)
{                   //锁相环时钟=2*16*(2+1)/(1+1)=48MHz
  REFDV=1;          //总线时钟=48/2=24MHz
  SYNR=2;
  while(!(CRGFLG&0x08));
  CLKSEL=0x80;
}
void judge(void) {

if(PORTB_PB0=1)
{

PORTA=0X01;
}
else if(PORTB_PB1=1)
{
   PORTA=0X03;
}
else
{
   PORTA=0X07;
}
}
void main(void) {
  /* put your own code here */
PLL_Init( );
DDRB=0X00;
PORTB=0X00;
DDRA=0XFF;
PORTA=0X00;
while(1)
{
   judge() ;
}
EnableInterrupts;
  for(;;) {

  } /* loop forever */
  /* please make sure that you never leave main */
}