STM32 - Application of external interrupt induction lamp

STM32—— Application of external interruption induction lamp

Description of project ：

Environmental Overview ：

Windows10 pro

MDK—Lite 5.25

step ：

Configuration related files

Premise ： Configure related structures

	GPIO_InitTypeDef shake_init;
	EXTI_InitTypeDef exti_init;
	NVIC_InitTypeDef nvic_init;

To configure IO mouth 、 External interrupt clock 、 Multiplexed clock

// Configure external interrupt clock 
	// Reuse 
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
	GPIO_EXTILineConfig(GPIO_PortSourceGPIOA,  GPIO_PinSource1);
	NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);

1、 Initializes the used to interrupt GPIO mouth

shake_init.GPIO_Mode = GPIO_Mode_IPD;
shake_init.GPIO_Pin  = GPIO_Pin_1;
shake_init.GPIO_Speed= GPIO_Speed_10MHz;
GPIO_Init(GPIOA,&shake_init);

This is to initialize the sensor IO mouth

2、 initialization EXTI External interrupt

	// The interrupt line is consistent with the pin port 
	exti_init.EXTI_Line		= EXTI_Line1;
	exti_init.EXTI_LineCmd  = ENABLE;
	exti_init.EXTI_Mode     = EXTI_Mode_Interrupt;
	exti_init.EXTI_Trigger  = EXTI_Trigger_Falling;
	EXTI_Init(&exti_init);

3、 To configure NVIC Interrupt controller

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);

​

The parameters inside , How can we find it ？

As shown in the figure ：

nvic_init.NVIC_IRQChannel 					= EXTI1_IRQn;
nvic_init.NVIC_IRQChannelSubPriority		=  1;
nvic_init.NVIC_IRQChannelPreemptionPriority =  1;
nvic_init.NVIC_IRQChannelCmd      		    = ENABLE;
NVIC_Init(&nvic_init);

4、 Write interrupt service function

void EXTI1_IRQHandler(void)
{
    
	
	if(EXTI_GetITStatus(EXTI_Line1) != RESET)// Determine whether an interruption has occurred 
		{
    
			GPIO_ResetBits(GPIOA, GPIO_Pin_3);
			delayTime(1000);
			GPIO_SetBits(GPIOA, GPIO_Pin_3);

		
	}
	EXTI_ClearFlag( EXTI_Line1);

}

Determine whether an interruption has occurred

Code ：

exti.c Code ：

#include "exti.h"
#include "stm32f10x.h"
void Exti_Init(void){
    
	// Configuration structure 
	GPIO_InitTypeDef shake_init;
	EXTI_InitTypeDef exti_init;
	NVIC_InitTypeDef nvic_init;
	// Configure external interrupt clock 
	// Reuse 
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
	GPIO_EXTILineConfig(GPIO_PortSourceGPIOA,  GPIO_PinSource1);

	
	//1、 Initializes the used to interrupt GPIO mouth 
	shake_init.GPIO_Mode = GPIO_Mode_IPD;
	shake_init.GPIO_Pin  = GPIO_Pin_1;
	shake_init.GPIO_Speed= GPIO_Speed_10MHz;
	
	GPIO_Init(GPIOA,&shake_init);
	//2、 initialization EXTI External interrupt 
	// The interrupt line is consistent with the pin port 
	exti_init.EXTI_Line			= EXTI_Line1;
	exti_init.EXTI_LineCmd  = ENABLE;
	exti_init.EXTI_Mode     = EXTI_Mode_Interrupt;
	exti_init.EXTI_Trigger  = EXTI_Trigger_Falling;
	EXTI_Init(&exti_init);
	
	//3、 To configure NVIC Interrupt controller 
	NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);

	nvic_init.NVIC_IRQChannel 									= EXTI1_IRQn;
	nvic_init.NVIC_IRQChannelSubPriority				=  1;
	nvic_init.NVIC_IRQChannelPreemptionPriority =  1;
	nvic_init.NVIC_IRQChannelCmd      				  = ENABLE;
	NVIC_Init(&nvic_init);
	
	//4、 Write interrupt service function 
	
}

exti.h Code ：

#include "stm32f10x.h"

void Exti_Init(void);

main.c Code ：

#include "stm32f10x.h"
#include "led.h"
#include "Relay.h"
#include "Shake.h"
#include "exti.h"
int main(void)
{
     
	LED_Init();// The lamp 
	Relay_Init();// Relay 
	Shake_Init();// Vibration sensors 
	Exti_Init();

	GPIO_SetBits(GPIOA, GPIO_Pin_3);// It's pins 3j Relay high level —— Turn off the lights 
	
	while(1){
    

		}
	

}

void EXTI1_IRQHandler(void)
{
    
	
	if(EXTI_GetITStatus(EXTI_Line1) != RESET)// Determine whether an interruption has occurred 
		{
    
			GPIO_ResetBits(GPIOA, GPIO_Pin_3);
			delayTime(1000);
			GPIO_SetBits(GPIOA, GPIO_Pin_3);

		
	}
	EXTI_ClearFlag( EXTI_Line1);

}