2022-11-27 ARM- 用C语言实现stm32的三盏灯的点亮

1. 头文件

#ifndef __LED_H__
#define __LED_H__
 
//结构体封装
/*LED1*/
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;
#define GPIOE ((gpio_t*)0x50006000)
#define GPIOF ((gpio_t*)0x50007000)
 
//LED1灯初始化
void led1_init(void);
//LED1灯点亮
void led1_on(void);
//LED1灯熄灭
void led1_off(void);
 
 
//LED2灯初始化
void led2_init(void);
//LED2灯的点亮
void led2_on(void);
//LED2灯的熄灭
void led2_off(void);
 
//LED3灯初始化
void led3_init(void);
//LED3灯的点亮
void led3_on(void);
//LED3灯的熄灭
void led3_off(void);
 
#endif

2.功能函数

#include "led.h"
 
//LED1灯初始化
void led1_init(void)
{
	//1.设置GPIOE控制器使能
	*(volatile unsigned int*)0x50000A28 |= (0x1 << 4);
 
	//2.设置PE10引脚为输出模式
	GPIOE->MODER &= (~(0x3 << 20));
	GPIOE->MODER |= (0x1 << 20);
 
	//3.设置PE10引脚为推晚输出模式
	GPIOE->OTYPER &= (~(0x1 << 10));	
 
	//4.设置PE10引脚为低速输出
	GPIOE->OSPEED &= (~(0x3 << 20));
 
	//5.设置PE10引脚禁止上下拉电阻
	GPIOE->PUPDR &= (~(0x3 << 20));
}
 
//LED1灯点亮
void led1_on(void)
{
	//1.设置PE10引脚输出高电平
	GPIOE->ODR |= (0x1 << 10);
}
 
//LED1灯熄灭
void led1_off(void)
{
	//1.设置PE10引脚输出低电平
	GPIOE->ODR &= (~(0x1 << 10));
}
 
 
//LED2灯初始化
void led2_init(void)
{
	//1.设置GPIOF控制器使能
	*(volatile unsigned int*)0x50000A28 |= (0x1 << 5);
 
	//2.设置PF10引脚为输出模式
	GPIOF->MODER &= (~(0x3 << 20));
	GPIOF->MODER |= (0x1 << 20);
 
	//3.设置PF10的引脚为推挽输出模式
	GPIOF->OTYPER &= (~(0x3 << 20));
 
	//4.设置PF10引脚为低速输出
	GPIOF->OSPEED &= (~(0x3 << 20));
 
	//设置PF10引脚进制上下拉电阻
	GPIOF->PUPDR &= (~(0x3 << 20));
	
 
}
//LED2灯的点亮
void led2_on(void)
{
	GPIOF->ODR |= (0x1 << 10);
}
 
//LED2灯的熄灭
void led2_off(void)
{
	GPIOF->ODR &= (~(0x1 << 10));
}
 
 
//LED3灯初始化
void led3_init(void)
{
	//1.设置GPIOE控制器是使能
	*(volatile unsigned int*)0x50000A28 |= (0x1 << 4);
 
	//2.设置PE8为输出模式
	GPIOE->MODER &= (~(0x3 << 16));
	GPIOE->MODER |= (0x1 << 16);
 
	//3.设置PE8为推挽输出
	GPIOE->OTYPER &= (~(0x1 << 8));
 
	//4.设置PE8为低速运行
	GPIOE->OSPEED &= (~(0x3 << 16));
 
	//5.设置PE8进制上下拉电阻
	GPIOE->PUPDR &= (~(0x3 << 16));
}
//LED3灯的点亮
void led3_on(void)
{
	GPIOE->ODR |= (0x1 << 8);
}
//LED3灯的熄灭
void led3_off(void)
{
	GPIOE->ODR &= (~(0x1 << 8));
}
 

3.测试函数

 

#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();
	led2_init();
	led3_init();
	while(1)
	{
		led1_on();
		delay_ms(500);
		led1_off();
		delay_ms(500);
 
		led2_on();
		delay_ms(500);
		led2_off();
		delay_ms(500);
 
		led3_on();
		delay_ms(500);
		led3_off();
		delay_ms(500);
 
 
 
	}
 
 
 
	return 0;
}