按键实验没有反应，不知道是哪里错了

32萌新跪求大佬

uint8_t press_K1(){
if(((GPIOA->IDR)&0x0001)!=1){
  return 0;
}else{
  return 1;
}
}
uint8_t press_K2(){
if(((GPIOC->IDR)&0x2000)!=1){  
  return 0;
}else{
  return 1;
}
}
void key_Init(){
RCC->APB2ENR |= (0x01<<2);
RCC->APB2ENR |= (0x01<<4);

GPIOA->CRL &= ~(0x0f<<0);
GPIOA->CRL |=  (0x04<<0);
GPIOC->CRH &= ~((uint32_t)0x0f<<20);
GPIOC->CRH |=  ((uint32_t)0x04<<20);
}


我检查了好几遍，不知道错在哪里了，求大佬指点