void LED_Init(void)
{
RCC->APB2ENR__________________________; //使能PORTC时钟
GPIOC->CRH&=______________;
GPIOC->CRH|=______________;// PC11、PC12推挽输出, 50MHz
GPIOC->ODR|=( _____________|______________); //LED1、LED2熄灭
}
答案:
|=1<<4;
0XFFF00FFF
0X00033000
(1<<11 | 1<<12)