用C语言实现LED1/LED2/LED3三盏灯点亮

原创已于 2023-02-17 20:11:08 修改 · 542 阅读

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#c语言 #单片机 #stm32

于 2023-02-17 19:53:10 首次发布

该代码示例展示了如何使用C语言操作GPIO来初始化并控制三个LED灯（LED1、LED2、LED3）的亮灭，通过设置RCC和GPIO寄存器实现。在主函数中，LED灯按照特定顺序和间隔进行闪烁。

用C语言实现LED1/LED2/LED3三盏灯点亮

头文件

#ifndef __LED_H__
#define __LED_H__

typedef struct Gpio{
	volatile unsigned int MODER;
	volatile unsigned int OTYPER;
	volatile unsigned int OSPEEDR;
	volatile unsigned int PURDR;
	volatile unsigned int IDR;
	volatile unsigned int ODR;
}gpio_t;
#define RCC_AHB4_ENSETR (*(volatile unsigned int*)0x50000A28)
#define GPIOE ((gpio_t*)0x50006000)
#define GPIOF ((gpio_t*)0x50007000)


void led1_init();
void led1_on();
void led1_off();


void led2_init();
void led2_on();
void led2_off();


void led3_init();
void led3_on();
void led3_off();


#endif

源文件

#include "led.h"

/**************LED1***************/
void led1_init(){
	//RCC
	RCC_AHB4_ENSETR = RCC_AHB4_ENSETR | (0x1 << 4);
	//GPIOE
	//输出模式
	GPIOE->MODER = GPIOE->MODER & (~(0x3 << 20));
	GPIOE->MODER = GPIOE->MODER | (0x1<<20);
	//推挽输出模式
	GPIOE->OTYPER = GPIOE->OTYPER & (~(0x1<<10));
	//低速输出
	GPIOE->OSPEEDR = GPIOE->OSPEEDR & (~(0x3<<20));
	//禁止上下拉电阻
	GPIOE->PURDR = GPIOE->PURDR & (~(0x3<<20));

}
void led1_on(){
	GPIOE->ODR = GPIOE->ODR | (0x1<<10);
}
void led1_off(){
	GPIOE->ODR = GPIOE->ODR & (~(0x1<<10));
}

/**************LED2***************/
void led2_init(){
	//RCC
	RCC_AHB4_ENSETR = RCC_AHB4_ENSETR | (0x1 << 5);
	//GPIOF
	//输出模式
	GPIOF->MODER = GPIOF->MODER & (~(0x3 << 20));
	GPIOF->MODER = GPIOF->MODER | (0x1<<20);
	//推挽输出模式
	GPIOF->OTYPER = GPIOF->OTYPER & (~(0x1<<10));
	//低速输出
	GPIOF->OSPEEDR = GPIOF->OSPEEDR & (~(0x3<<20));
	//禁止上下拉电阻
	GPIOF->PURDR = GPIOF->PURDR & (~(0x3<<20));

}
void led2_on(){
	GPIOF->ODR = GPIOF->ODR | (0x1<<10);
}
void led2_off(){
	GPIOF->ODR = GPIOF->ODR & (~(0x1<<10));
}

/**************LED3***************/
void led3_init(){
	//RCC
	RCC_AHB4_ENSETR = RCC_AHB4_ENSETR | (0x1 << 4);
	//GPIOE
	//输出模式
	GPIOE->MODER = GPIOE->MODER & (~(0x3 << 16));
	GPIOE->MODER = GPIOE->MODER | (0x1<<16);
	//推挽输出模式
	GPIOE->OTYPER = GPIOE->OTYPER & (~(0x1<<8));
	//低速输出
	GPIOE->OSPEEDR = GPIOE->OSPEEDR & (~(0x3<<16));
	//禁止上下拉电阻
	GPIOE->PURDR = GPIOE->PURDR & (~(0x3<<16));

}
void led3_on(){
	GPIOE->ODR = GPIOE->ODR | (0x1<<8);
}
void led3_off(){
	GPIOE->ODR = GPIOE->ODR & (~(0x1<<8));
}
ub

主调函数文件

#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(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;
}