c language_lighting_A7 núcleo

 cat include/led.h 

#ifndef __LED_H__
#define __LED_H__

//声明一个结构体
typedef struct{
	unsigned int MODERl;
	unsigned int OTYPER;
	unsigned int OSPEEDR;
	unsigned int PUPDR;
	unsigned int IDR;
	unsigned int ODR;
}gpio_t;
#define GPIOE ((volatile gpio_t*)0x50006000)
#define GPIOF ((volatile gpio_t*)0x50007000)
#define RCC_MP_AHB4ENSETR (*(volatile int*)0x50000A28)

//LED1初始化
void led1_init(); 
//LED1点亮
void led1_on();
//LED1熄灭
void led1_off();

//LED2初始化
void led2_init();
//LED2点亮
void led2_on();
//LED2熄灭
void led2_off();

//LED3初始化
void led3_init();
//LED3点亮
void led3_on();
//LED3熄灭
void led3_off();


#endif

gato src/led.c 

#include "led.h"

//LED1初始化
void led1_init()
{
	//操作寄存器，参考汇编代码
	RCC_MP_AHB4ENSETR |= (0x1 << 4);
	GPIOE->MODERl &= ~(0x3 << 20);
	GPIOE->MODERl |= (0x1 << 20);
	GPIOE->OTYPER &= ~(0x1 << 10);
	GPIOE->OSPEEDR &= ~(0x3 << 20);
	GPIOE->PUPDR &= ~(0x3 << 20);
}
//LED1点亮
void led1_on()
{
	GPIOE->ODR &= (0x1 << 10);
}
//LED1熄灭
void led1_off()
{
	GPIOE->ODR &= (0x1 << 10);
}

//LED2初始化
void led2_init()
{
	//操作寄存器，参考汇编代码
	RCC_MP_AHB4ENSETR |= (0x1 << 5);
	GPIOF->MODERl &= ~(0x3 << 20);
	GPIOF->MODERl |= (0x1 << 20);
	GPIOF->OTYPER &= ~(0x1 << 10);
	GPIOF->OSPEEDR &= ~(0x3 << 20);
	GPIOF->PUPDR &= ~(0x3 << 20);
}
//LED2点亮
void led2_on()
{
	GPIOF->ODR &= ~(0x1 << 10);
}
//LED2熄灭
void led2_off()
{
	GPIOF->ODR &= ~(0x1 << 10);
}

//LED3初始化
void led3_init()
{
	//操作寄存器，参考汇编代码
	RCC_MP_AHB4ENSETR |= (0x1 << 4);
	GPIOE->MODERl &= ~(0x3 << 16);
	GPIOE->MODERl |= (0x1 << 16);
	GPIOE->OTYPER &= ~(0x1 << 8);
	GPIOE->OSPEEDR &= ~(0x3 << 16);
	GPIOE->PUPDR &= ~(0x3 << 16);
}
//LED3点亮
void led3_on()
{
	GPIOE->ODR &= ~(0x1 << 8);
}
//LED3熄灭
void led3_off()
{
	GPIOE->ODR &= ~(0x1 << 8);
}

gato main.c  

#include "led.h"
extern void printf(const char *fmt, ...);
void delay_ms(int ms)
{
	int i,j;
	for(i = 0; i < ms;i++)
		for (j = 0; j < 1800; j++);
}

int main()
{
	led1_init(); // LED灯初始化
	led2_init(); // LED灯初始化
	led3_init(); // LED灯初始化
	while(1)
	{
		led1_on();
		delay_ms(1000);
		led1_off();
		delay_ms(1000);
		led2_on();
		delay_ms(1000);
		led2_off();
		delay_ms(1000);
		led3_on();
		delay_ms(1000);
		led3_off();
		delay_ms(1000);
	}
	return 0;
}