C语言实现LED1闪烁

led.h

#ifndef __LED_H__
#define __LED_H__

//RCC寄存器封装
#define RCC_MP_AHB4_ENSETR (*(volatile unsigned int*)0x50000A28) //寄存器封装

//GPIO寄存器封装
typedef struct{
    volatile unsigned int MODER; //00
    volatile unsigned int OTYPER; //04
    volatile unsigned int OSPEEDR; //08
    volatile unsigned int PUPDR; //0C
    volatile unsigned int IDR; //10
    volatile unsigned int ODR; //14
}gpio_t;
#define GPIOE (*(gpio_t*)0x50006000) //GPIOE基地址 0x50006000
#define GPIOF (*(gpio_t*)0x50007000) //GPIOF基地址 0x50007000

//LED1灯初始化
void led1_rcc_init();
//LED1灯点亮
void led1_on();
//LED1灯熄灭
void led1_off();


#endif

led.c

#include "led.h"


//LED1灯初始化
void led1_rcc_init()
{
	//设置GPIOE组时钟使能 通过RCC_MP_AHB4ENSETR寄存器设置 0x50000A28[4] = 1
	RCC_MP_AHB4_ENSETR |=(0x1<<4);
	//1.设置PE10引脚为输出模式 通过GPIOE_MODER寄存器设置 0x50006000[21:20] = 01
	GPIOE.MODER&=~(0x3<<20);
	GPIOE.MODER|=(0x1<<20);
	//2.设置PE10引脚为推挽输出类型 通过GPIOE_OTYPER寄存器设置 0x50006004[10] = 0
	GPIOE.OTYPER&=~(0x1<<10);
	//3.设置PE10引脚为低速输出 通过GPIOE_OSPEEDR寄存器设置 0x50006008[21:20] =00
	GPIOE.OSPEEDR&=~(0x3<<20);
	//4.设置PE10引脚为禁止上下拉电阻 通过GPIOE_PUPDR寄存器设置 0x5000600C[21:20]= 00
	GPIOE.PUPDR&=~(0x3<<20);

}

//LED1灯点亮
void led1_on()
{
	//1.设置PE10引脚为输出高电平 通过GPIOE_ODR寄存器设置 0x50006014[10] = 1
	GPIOE.ODR|=(0x1<<10);
}

//LED1灯熄灭
void led1_off()
{
	//1.设置PE10引脚为输出低电平 通过GPIOE_ODR寄存器设置 0x50006014[10] = 0
	GPIOE.ODR&=~(0x1<<10);
}

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灯初始化
	 led1_rcc_init();
	while(1)
	{
		//LED1灯点亮
		led1_on();
		delay_ms(500);
		//LED1灯熄灭
		led1_off();
		delay_ms(500);
	}
	return 0;
}