循环点亮三个led灯

方法1

------------------led.h----------------
#ifndef __LED_H__
#define __LED_H__

#define RCC (*(volatile unsigned int *)0x50000A28)
#define GPIOE ((GPIO_t *)0x50006000)
#define GPIOF ((GPIO_t *)0x50007000)

//结构体封装
typedef struct
{
	volatile unsigned int MODER;
	volatile unsigned int OTYPER;
	volatile unsigned int OSPEED;
	volatile unsigned int PUPDR;
	volatile unsigned int IDR;
	volatile unsigned int ODR;
}GPIO_t;

//RCC章节初始化
void RCC_INIT();
//LED1 ----> PE10
//LED1 - GPIO章节初始化
void LED1_GPIO_INIT();
//LED1点亮
void LED1_ON();
//LED1熄灭
void LED1_OFF();


//LED2 ----> PF10
//LED2 - GPIO章节初始化
void LED2_GPIO_INIT();
//LED2点亮
void LED2_ON();
//LED2熄灭
void LED2_OFF();


//LED3 ----> PF10
//LED3 - GPIO章节初始化
void LED3_GPIO_INIT();
//LED3点亮
void LED3_ON();
//LED3熄灭
void LED3_OFF();

#endif

------------------led.c----------------
#include "led.h"

//LED1 ---> PE10
//RCC章节初始化
void RCC_INIT()
{
	RCC = RCC | (0x3 << 4);
}
//LED1 - GPIO章节初始化
void LED1_GPIO_INIT()
{
	//设置为输出模式 0x50006000[21,20] -> 01
	GPIOE->MODER &= (~(0x3 << 20));
	GPIOE->MODER |= (0x1 << 20);
	//设置为推挽输出 0x50006004[10] -> 0
	GPIOE->OTYPER &= (~(0x1 << 10));
	//设置为低速模式 0x50006008[21,20] -> 00
	GPIOE->OSPEED &= (~(0x3 << 20));
	//设置为禁止上下拉电阻 0x5000600c[21,20] -> 00
	GPIOE->PUPDR &= (~(0x3 << 20));
}
//LED1点亮
void LED1_ON()
{
	//点亮LED1 0x50006014[10] -> 1
	GPIOE->ODR |= (0x1 << 10);
}
//LED1熄灭
void LED1_OFF()
{
	//熄灭LED1 0x50006014[10] -> 0
	GPIOE->ODR &= (~(0x1 << 10));
}


//LED2 ----> PF10
//LED2 - GPIO章节初始化
void LED2_GPIO_INIT()
{
	//设置为输出模式 0x50007000[21,20] -> 01
	GPIOF->MODER &= (~(0x3 << 20));
	GPIOF->MODER |= (0x1 << 20);
	//设置为推挽输出 0x50007004[10] -> 0
	GPIOF->OTYPER &= (~(0x1 << 10));
	//设置为低速模式 0x50007008[21,20] -> 00
	GPIOF->OSPEED &= (~(0x3 << 20));
	//设置为禁止上下拉电阻 0x5000700c[21,20] -> 00
	GPIOF->PUPDR &= (~(0x3 << 20));

}
//LED2点亮
void LED2_ON()
{
	//点亮LED2 0x50007014[10] -> 1
	GPIOF->ODR |= (0x1 << 10);
}

//LED2熄灭
void LED2_OFF()
{
	//熄灭LED2 0x50007014[10] -> 0
	GPIOF->ODR &= (~(0x1 << 10));
}

//LED3 ----> PF10
//LED3 - GPIO章节初始化
void LED3_GPIO_INIT()
{
	//设置为输出模式 0x50006000[17,16] -> 01
	GPIOE->MODER &= (~(0x3 << 16));
	GPIOE->MODER |= (0x1 << 16);
	//设置为推挽输出 0x50006004[8] -> 0
	GPIOE->OTYPER &= (~(0x1 << 8));
	//设置为低速模式 0x50006008[17,16] -> 00
	GPIOE->OSPEED &= (~(0x3 << 16));
	//设置为禁止上下拉电阻 0x5000600c[17,16] -> 00
	GPIOE->PUPDR &= (~(0x3 << 16));
}

//LED3点亮
void LED3_ON()
{
	//点亮LED3 0x50006014[8] -> 1
	GPIOE->ODR |= (0x1 << 8);
}
//LED3熄灭
void LED3_OFF()
{
	//熄灭LED3 0x50006014[8] -> 0
	GPIOE->ODR &= (~(0x1 << 8));
}

-----------------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()
{
	// LED灯初始化
	RCC_INIT();
	LED1_GPIO_INIT();
	LED2_GPIO_INIT();
	LED3_GPIO_INIT();

	while(1)
	{
		
		//点亮LED1
		LED1_ON();
		delay_ms(500);
		//熄灭LED1
		LED1_OFF();
		//点亮LED2
		LED2_ON();
		delay_ms(500);
		//熄灭LED2
		LED2_OFF();
		//点亮LED3
		LED3_ON();
		delay_ms(500);
		//熄灭LED3
		LED3_OFF();
		

	}
	return 0;
}

方法2