led.c

#include "led.h"

void LED_Config(void)

{

	GPIO_InitTypeDef GPIO_InitStruct;

	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);

	GPIO_InitStruct.GPIO_Mode=GPIO_Mode_Out_PP;

	GPIO_InitStruct.GPIO_Pin=GPIO_Pin_0;

	GPIO_InitStruct.GPIO_Speed=GPIO_Speed_50MHz;

	GPIO_Init(GPIOB, &GPIO_InitStruct);

}

void LED_Toggle(void)

{

	GPIOB->ODR ^= GPIO_Pin_0;

}

led.h

#ifndef __LED_H

#define __LED_H

#include "stm32f10x.h"

void LED_Config(void);

void LED_Toggle(void);

#endif

exti.c

#include "exti.h"

#include "led.h"

static void NVIC_Config(void)

{

	NVIC_InitTypeDef NVIC_InitStruct;

	NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);

	NVIC_InitStruct.NVIC_IRQChannel=EXTI0_IRQn;

	NVIC_InitStruct.NVIC_IRQChannelCmd=ENABLE;

	NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority=1;

	NVIC_InitStruct.NVIC_IRQChannelSubPriority=1;

	NVIC_Init(&NVIC_InitStruct);

}

void EXTI_Config(void)

{

	EXTI_InitTypeDef EXTI_InitStruct;

	NVIC_Config();

	RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);

	EXTI_InitStruct.EXTI_Line=EXTI_Line0;

	EXTI_InitStruct.EXTI_LineCmd=ENABLE;

	EXTI_InitStruct.EXTI_Mode=EXTI_Mode_Interrupt;

	EXTI_InitStruct.EXTI_Trigger=EXTI_Trigger_Falling;

	EXTI_Init(&EXTI_InitStruct);

}

void EXTI0_IRQHandler(void)

{

	if(EXTI_GetITStatus(EXTI_Line0)) LED_Toggle();

	EXTI_ClearITPendingBit(EXTI_Line0);

}

exti.h

#ifndef __EXTI_H

#define __EXTI_H

#include "stm32f10x.h"

void EXTI_Config(void);

#endif

main.c

#include "stm32f10x.h"

#include "led.h"

#include "exti.h"

int main(void)

{

	LED_Config();

	EXTI_Config();

	while(1)

	{

	}

}

STM32外部中断(EXTI)控制LED亮灭的代码的相关教程结束。