Question

stm32单片机 怎么直接操作寄存器

Answer 1

楼主你这样真的很为难人，以stm32的跑马灯为例

#include "led.h"//头文件自己写

#include "stm32f4xx.h"//直接操作寄存器必备的头文件

void LED_Init(void)

{

 RCC->AHB1ENR|= 1<<5;//时钟初始化；1<<5是对寄存器第五位进行操作

//PF9为LED所接引脚

 GPIOF->MODER &= ~(3<<2*9);

 GPIOF->MODER |= 1<<(2*9);

 GPIOF->OSPEEDR &= ~(3<<2*9);

 GPIOF->OSPEEDR |= 2<<(2*9);

 GPIOF->PUPDR &= ~(3<<2*9);

 GPIOF->PUPDR |=1<<(2*9);

GPIOF->OTYPER &= ~(1<<9);

GPIOF->OTYPER |=0<<9;

GPIOF->ODR|= 1<<9;//1

//GPIOF->ODR&=~(1<<9);//0

//PF10类比于PF9

GPIOF->MODER &= ~(3<<2*10);

 GPIOF->MODER |= 1<<(2*10);

 GPIOF->OSPEEDR &= ~(3<<2*10);

 GPIOF->OSPEEDR |= 2<<(2*10);

 GPIOF->PUPDR &= ~(3<<2*10);

 GPIOF->PUPDR |=1<<(2*10);

GPIOF->OTYPER &= ~(1<<10);

GPIOF->OTYPER |=0<<10;

GPIOF->ODR|= 1<<10;

}