使用C语言实现LED1/LED2/LED3灯点亮

gpio.h文件

#ifndef __GPIO_H__
#define __GPIO_H__

//封装RCC寄存器
#define RCC (volatile unsigned int*)0x50000A28
//封装GPIO寄存器
typedef struct
{
	volatile unsigned int MODER;
	volatile unsigned int OTYPER;
	volatile unsigned int OSPEEDR;
	volatile unsigned int PUPDR;
	volatile unsigned int IDR;
	volatile unsigned int ODR;
}gpio_t;
#define GPIOE10 ((gpio_t*)0x50006000)
#define GPIOF10 ((gpio_t*)0x50007000)
#define GPIOE8 ((gpio_t*)0x50006000)

//LED1灯初始化
void LED1_init();
//LED2灯初始化
void LED2_init();
//LED3灯初始化
void LED3_init();

//LED1灯点亮
void LED1_on();
//LED2灯点亮
void LED2_on();
//LED3灯点亮
void LED3_on();

//LED1灯熄灭
void LED1_off();
//LED2灯熄灭
void LED2_off();
//LED3灯熄灭
void LED3_off();

#endif

gpio.c

#include "gpio.h"
extern void printf(const char *fmt, ...);
unsigned int i = 0;

//LED1灯初始化
void LED1_init()
{
	//GPIOE使能
	*RCC |= (0x1<<4);
	//GPIOE10引脚设置为输出模式
	GPIOE10->MODER &= (~(0x3<<20));
	GPIOE10->MODER |= (0x1<<20);
	//GPIOE10引脚设置为推挽输出模式
	GPIOE10->OTYPER &= (0x1<<10);
	//GPIOE10引脚设置为低速模式
	GPIOE10->OSPEEDR &= (~(0x3<<20));
	//GPIOE10引脚设置为禁止上下拉模式
	GPIOE10->PUPDR &= (~(0x3<<20));
}
//LED2灯初始化
void LED2_init()
{
	//GPIOE使能
	*RCC |= (0x1<<5);
	//GPIOF10引脚设置为输出模式
	GPIOF10->MODER &= (~(0x3<<20));
	GPIOF10->MODER |= (0x1<<20);
	//GPIOF10引脚设置为推挽输出模式
	GPIOF10->OTYPER &= (0x1<<10);
	//GPIOF10引脚设置为低速模式
	GPIOF10->OSPEEDR &= (~(0x3<<20));
	//GPIOF10引脚设置为禁止上下拉模式
	GPIOF10->PUPDR &= (~(0x3<<20));
}
//LED3灯初始化
void LED3_init()
{
	//GPIOE使能
	*RCC |= (0x1<<4);
	//GPIOF10引脚设置为输出模式
	GPIOE8->MODER &= (~(0x3<<16));
	GPIOE8->MODER |= (0x1<<16);
	//GPIOE8引脚设置为推挽输出模式
	GPIOE8->OTYPER &= (0x1<<8);
	//GPIOE8引脚设置为低速模式
	GPIOE8->OSPEEDR &= (~(0x3<<16));
	//GPIOE8引脚设置为禁止上下拉模式
	GPIOE8->PUPDR &= (~(0x3<<16));
}

//LED1灯点亮
void LED1_on()
{
	GPIOE10->ODR |= (0x1<<10);
}
//LED2灯点亮
void LED2_on()
{
	GPIOF10->ODR |= (0x1<<10);
}
//LED3灯点亮
void LED3_on()
{
	GPIOE8->ODR |= (0x1<<8);
}

//LED1灯熄灭
void LED1_off()
{
	GPIOE10->ODR &= (~(0x1<<10));
}
//LED2灯熄灭
void LED2_off()
{
	GPIOF10->ODR &= (~(0x1<<10));
}
//LED3灯熄灭
void LED3_off()
{
	GPIOE8->ODR &= (~(0x1<<8));
}

main.c

#include "gpio.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();
	LED2_init();
	LED3_init();
	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;
}

测试结果：