头文件

#ifndef __LED_H__
#define __LED_H__

#define RCC (*(unsigned int *)0X50000A28)

#define GPIOE_MODER (*(unsigned int *)0X50006000)
#define GPIOF_MODER (*(unsigned int *)0X50007000)
#define GPIOE_OTYPER (*(unsigned int *)0X50006004)
#define GPIOE_OSPEEDR (*(unsigned int *)0X50006008)
#define GPIOE_OPUPDR (*(unsigned int *)0X5000600C)
#define GPIOE_ODR (*(unsigned int *)0X50006014)

#define GPIOF_OTYPER (*(unsigned int *)0X50007004)
#define GPIOF_OSPEEDR (*(unsigned int *)0X50007008)
#define GPIOF_OPUPDR (*(unsigned int *)0X5000700C)
#define GPIOF_ODR (*(unsigned int *)0X50007014)

void all_led_init();
void LED1_ON();
void LED2_ON();
void LED3_ON();
void LED1_OFF();
void LED2_OFF();
void LED3_OFF();
#endif

.c

#include "led.h"
 
void all_led_init()//led灯的初始化
{
    //GPIOE/GPIOF时钟使能
   RCC  |= (0x3<<4);
    //PE10设置为输出
    GPIOE_MODER &= (~(0X3<<20));
    GPIOE_MODER |= (0X1<<20);
    //PF10设置为输出
    GPIOF_MODER &= (~(0X3<<20));
    GPIOF_MODER |= (0X1<<20);
    //PE8设置为输出
    GPIOE_MODER &= (~(0X3<<16));
    GPIOE_MODER |= (0X1<<16);
    //PE10设置为推挽输出
    GPIOE_OTYPER &= (~(0X1<<10));
    //PF10设置为推挽输出
    GPIOF_OTYPER &= (~(0X1<<10));
    //PE8设置为推挽输出
    GPIOE_OTYPER &= (~(0X1<<8));
    //PE10设置为低速输出
    GPIOE_OSPEEDR &= (~(0X3<<20));
    //PF10设置为低速输出
    GPIOF_OSPEEDR &= (~(0X3<<20));
    //PE8设置为低速输出
   GPIOE_OSPEEDR &= (~(0X3<<16));
    //PE10无上拉下拉电阻
    GPIOE_OPUPDR &= (~(0X3<<20));
    //PF10无上拉下拉电阻
    GPIOF_OPUPDR &= (~(0X3<<20));
    //PE8无上拉下拉电阻
    GPIOE_OPUPDR &= (~(0X3<<16));
 
    //三盏灯默认输出低电平
    GPIOE_ODR &= (~(0X1<<10));
   GPIOF_ODR &= (~(0X1<<10));
    GPIOE_ODR &= (~(0X1<<8));
}
 
//led1亮
void LED1_ON()
{
    GPIOE_ODR |= (0X1<<10);
}
//led2亮
void LED2_ON()
{
   GPIOF_ODR |= (0X1<<10);
}
//led3亮
void LED3_ON()
{
    GPIOE_ODR |= (0X1<<8);
}
 
//LED1灭
void LED1_OFF()
{
     GPIOE_ODR &= (~(0X1<<10));
}
//LED2灭
void LED2_OFF()
{
     GPIOF_ODR &= (~(0X1<<10));
}
//LED3灭
void LED3_OFF()
{
     GPIOE_ODR &= (~(0X1<<8));
}