本傳感器我分為使用外部中斷與不使用外部中斷

因為和按鍵原理差不多，所以移植修改按鍵即可

原理圖

main.c

/**
  * @brief  主函數(shù)
  * @param  無
  * @retval 無
  */ 
int main(void)
{
	/* LED 端口初始化 */
	LED_GPIO_Config();
	  	
	/* 初始化EXTI中斷，按下按鍵會觸發(fā)中斷，
  *  觸發(fā)中斷會進入stm32f4xx_it.c文件中的函數(shù)
	*  KEY1_IRQHandler和KEY2_IRQHandler，處理中斷，反轉LED燈。
	*/
	EXTI_Key_Config(); 
	
	/* 等待中斷，由于使用中斷方式，CPU不用輪詢按鍵 */
	while(1)                            
	{
	}
}

stm32f103x_it.c

/**
  ******************************************************************************
  * @file    Project/STM32F10x_StdPeriph_Template/stm32f10x_it.c 
  * @author  MCD Application Team
  * @version V3.5.0
  * @date    08-April-2011
  * @brief   Main Interrupt Service Routines.
  *          This file provides template for all exceptions handler and 
  *          peripherals interrupt service routine.
  ******************************************************************************
  * @attention
  *
  * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
  * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
  * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
  * DIRECT, INDIRECT OR CONSEQUENTI
  
  AL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
  * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
  * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
  *
  * <h2><center>&copy; COPYRIGHT 2011 STMicroelectronics</center></h2>
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include "stm32f10x_it.h"
#include "bsp_led.h"
#include "bsp_exti.h"

/** @addtogroup STM32F10x_StdPeriph_Template
  * @{
  */

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/

/******************************************************************************/
/*            Cortex-M3 Processor Exceptions Handlers                         */
/******************************************************************************/

/**
  * @brief  This function handles NMI exception.
  * @param  None
  * @retval None
  */
void NMI_Handler(void)
{
}

/**
  * @brief  This function handles Hard Fault exception.
  * @param  None
  * @retval None
  */
void HardFault_Handler(void)
{
  /* Go to infinite loop when Hard Fault exception occurs */
  while (1)
  {
  }
}

/**
  * @brief  This function handles Memory Manage exception.
  * @param  None
  * @retval None
  */
void MemManage_Handler(void)
{
  /* Go to infinite loop when Memory Manage exception occurs */
  while (1)
  {
  }
}

/**
  * @brief  This function handles Bus Fault exception.
  * @param  None
  * @retval None
  */
void BusFault_Handler(void)
{
  /* Go to infinite loop when Bus Fault exception occurs */
  while (1)
  {
  }
}

/**
  * @brief  This function handles Usage Fault exception.
  * @param  None
  * @retval None
  */
void UsageFault_Handler(void)
{
  /* Go to infinite loop when Usage Fault exception occurs */
  while (1)
  {
  }
}

/**
  * @brief  This function handles SVCall exception.
  * @param  None
  * @retval None
  */
void SVC_Handler(void)
{
}

/**
  * @brief  This function handles Debug Monitor exception.
  * @param  None
  * @retval None
  */
void DebugMon_Handler(void)
{
}

/**
  * @brief  This function handles PendSVC exception.
  * @param  None
  * @retval None
  */
void PendSV_Handler(void)
{
}

/**
  * @brief  This function handles SysTick Handler.
  * @param  None
  * @retval None
  */
void SysTick_Handler(void)
{
}



void KEY1_IRQHandler(void)
{
  //確保是否產(chǎn)生了EXTI Line中斷
	if(EXTI_GetITStatus(KEY1_INT_EXTI_LINE) != RESET) 
	{
		// LED1 取反		
		LED1_TOGGLE;
    //清除中斷標志位
		EXTI_ClearITPendingBit(KEY1_INT_EXTI_LINE);     
	}  
}

//void KEY2_IRQHandler(void)
//{
//  //確保是否產(chǎn)生了EXTI Line中斷
//	if(EXTI_GetITStatus(KEY2_INT_EXTI_LINE) != RESET) 
//	{
//		// LED2 取反		
//		LED2_TOGGLE;
//    //清除中斷標志位
//		EXTI_ClearITPendingBit(KEY2_INT_EXTI_LINE);     
//	}  
//}
/******************************************************************************/
/*                 STM32F10x Peripherals Interrupt Handlers                   */
/*  Add here the Interrupt Handler for the used peripheral(s) (PPP), for the  */
/*  available peripheral interrupt handler's name please refer to the startup */
/*  file (startup_stm32f10x_xx.s).                                            */
/******************************************************************************/

/**
  * @brief  This function handles PPP interrupt request.
  * @param  None
  * @retval None
  */
/*void PPP_IRQHandler(void)
{
}*/

/**
  * @}
  */ 


/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/

SW_18015P.h

#ifndef __EXTI_H
#define	__EXTI_H


#include "stm32f10x.h"


//引腳定義
#define KEY1_INT_GPIO_PORT         GPIOA
#define KEY1_INT_GPIO_CLK          (RCC_APB2Periph_GPIOA|RCC_APB2Periph_AFIO)
#define KEY1_INT_GPIO_PIN          GPIO_Pin_0
#define KEY1_INT_EXTI_PORTSOURCE   GPIO_PortSourceGPIOA
#define KEY1_INT_EXTI_PINSOURCE    GPIO_PinSource0
#define KEY1_INT_EXTI_LINE         EXTI_Line0
#define KEY1_INT_EXTI_IRQ          EXTI0_IRQn

#define KEY1_IRQHandler            EXTI0_IRQHandler


//#define KEY2_INT_GPIO_PORT         GPIOC
//#define KEY2_INT_GPIO_CLK          (RCC_APB2Periph_GPIOC|RCC_APB2Periph_AFIO)
//#define KEY2_INT_GPIO_PIN          GPIO_Pin_13
//#define KEY2_INT_EXTI_PORTSOURCE   GPIO_PortSourceGPIOC
//#define KEY2_INT_EXTI_PINSOURCE    GPIO_PinSource13
//#define KEY2_INT_EXTI_LINE         EXTI_Line13
//#define KEY2_INT_EXTI_IRQ          EXTI15_10_IRQn

//#define KEY2_IRQHandler            EXTI15_10_IRQHandler

void EXTI_Key_Config(void);


#endif /* __EXTI_H */

SW_18015P.c

#include "bsp_exti.h"

 /**
  * @brief  配置嵌套向量中斷控制器NVIC
  * @param  無
  * @retval 無
  */
static void NVIC_Configuration(void)
{
  NVIC_InitTypeDef NVIC_InitStructure;
  
  /* 配置NVIC為優(yōu)先級組1 */
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
  
  /* 配置中斷源：按鍵1 */
  NVIC_InitStructure.NVIC_IRQChannel = KEY1_INT_EXTI_IRQ;
  /* 配置搶占優(yōu)先級 */
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
  /* 配置子優(yōu)先級 */
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
  /* 使能中斷通道 */
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
  
  /* 配置中斷源：按鍵2，其他使用上面相關配置 */  
  //NVIC_InitStructure.NVIC_IRQChannel = KEY2_INT_EXTI_IRQ;
  NVIC_Init(&NVIC_InitStructure);
}

 /**
  * @brief  配置 IO為EXTI中斷口，并設置中斷優(yōu)先級
  * @param  無
  * @retval 無
  */
void EXTI_Key_Config(void)
{
	GPIO_InitTypeDef GPIO_InitStructure; 
	EXTI_InitTypeDef EXTI_InitStructure;

	/*開啟按鍵GPIO口的時鐘*/
	RCC_APB2PeriphClockCmd(KEY1_INT_GPIO_CLK,ENABLE);
  //RCC_APB2PeriphClockCmd(KEY2_INT_GPIO_CLK,ENABLE);
												
	/* 配置 NVIC 中斷*/
	NVIC_Configuration();
	
/*--------------------------KEY1配置-----------------------------*/
	/* 選擇按鍵用到的GPIO */	
  GPIO_InitStructure.GPIO_Pin = KEY1_INT_GPIO_PIN;
  /* 配置為浮空輸入 */	
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(KEY1_INT_GPIO_PORT, &GPIO_InitStructure);

	/* 選擇EXTI的信號源 */
  GPIO_EXTILineConfig(KEY1_INT_EXTI_PORTSOURCE, KEY1_INT_EXTI_PINSOURCE); 
  EXTI_InitStructure.EXTI_Line = KEY1_INT_EXTI_LINE;
	
	/* EXTI為中斷模式 */
  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
	/* 上升沿中斷 */
  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
  /* 使能中斷 */	
  EXTI_InitStructure.EXTI_LineCmd = ENABLE;
  EXTI_Init(&EXTI_InitStructure);
	
//  /*--------------------------KEY2配置-----------------------------*/
//	/* 選擇按鍵用到的GPIO */	
//  GPIO_InitStructure.GPIO_Pin = KEY2_INT_GPIO_PIN;
//  /* 配置為浮空輸入 */	
//  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
//  GPIO_Init(KEY2_INT_GPIO_PORT, &GPIO_InitStructure);

//	/* 選擇EXTI的信號源 */
//  GPIO_EXTILineConfig(KEY2_INT_EXTI_PORTSOURCE, KEY2_INT_EXTI_PINSOURCE); 
//  EXTI_InitStructure.EXTI_Line = KEY2_INT_EXTI_LINE;
//	
//	/* EXTI為中斷模式 */
//  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
//	/* 下降沿中斷 */
//  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
//  /* 使能中斷 */	
//  EXTI_InitStructure.EXTI_LineCmd = ENABLE;
//  EXTI_Init(&EXTI_InitStructure);
}
/*********************************************END OF FILE**********************/

參考

STM32-外部中斷詳解https://blog.csdn.net/qq_44016222/article/details/123539693?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522170212726916777224466739%2522%252C%2522scm%2522%253A%252220140713.130102334..%2522%257D&request_id=170212726916777224466739&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~all~baidu_landing_v2~default-1-123539693-null-null.142%5Ev96%5Epc_search_result_base7&utm_term=stm32%E7%9A%84%E5%A4%96%E9%83%A8%E4%B8%AD%E6%96%AD%E9%80%9A%E9%81%93&spm=1018.2226.3001.4187