STM32单片机外部中断按键抖动不好消除，有什么办法解决？

ID:302293 · 发表于 2023-9-20 16:52

/**
  ******************************************************************************
  * @file main.c
  * @author  Alexander
  * @version V1.0.0
  * @date 04-January-2023
  * @brief Main program body

  */

/* Includes ------------------------------------------------------------------*/
#include "main.h"

/** @addtogroup HK32F030Mxx_StdPeriph_Examples
  * @{
  */

/** @addtogroup EXTI_Example
  * @{
  */

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
EXTI_InitTypeDef EXTI_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

/* Private function prototypes -----------------------------------------------*/
static void EXTI4_Config(void);
static void EXTI1_Config(void);

void Delay(__IO uint32_t nCount)
{
  for(; nCount != 0; nCount--);
}
int main(void)
{
  /*!< At this stage the microcontroller clock setting is already configured,
   this is done through SystemInit() function which is called from startup
   file (KEIL_startup_hk32f030m.s) before to branch to application main.
   To reconfigure the default setting of SystemInit() function, refer to
   system_hk32f030m.c file
   */
  /* Initialize LEDs mounted on EVAL board       */
  HK_EVAL_LEDInit(LED1);
      HK_EVAL_LEDInit(LED2);
      HK_EVAL_LEDInit(LED3);

      /* Configure PC4 in interrupt mode */
      EXTI4_Config();

      /* Configure PA1 in interrupt mode */
      EXTI1_Config();

  /*  Delay(838709/5);Infinite loop */
  while (1)
  {
Delay(838709/5);
  }
}

/**
  * @brief  Configure PC4 in interrupt mode
  * @param  None
  * @retval None
  */
static void EXTI4_Config(void)
{
  /* Enable GPIOC clock */
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOC, ENABLE);

  /* Configure PC4 pin as input floating */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
  GPIO_Init(GPIOC, &GPIO_InitStructure);

  /* Enable SYSCFG clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
  /* Connect EXTI4 Line to PA0 pin */
  SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOC, EXTI_PinSource4);

  /* Configure EXTI4 line */
  EXTI_InitStructure.EXTI_Line = EXTI_Line4;
  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
  EXTI_InitStructure.EXTI_LineCmd = ENABLE;
  EXTI_Init(&EXTI_InitStructure);

  /* Enable and set EXTI4 Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = EXTI4_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPriority = 0x00;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}

/**
  * @brief  Configure PA1 in interrupt mode
  * @param  None
  * @retval None
  */
static void EXTI1_Config(void)
{
  /* Enable GPIOA clock */
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);

  /* Configure PA1 pins as input floating */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  /* Enable SYSCFG clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);

  /* Connect EXTI1 Line to PA1 pin */
  SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOA, EXTI_PinSource1);

  /* Configure EXTI1 line */
  EXTI_InitStructure.EXTI_Line = EXTI_Line1;
  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
  EXTI_InitStructure.EXTI_LineCmd = ENABLE;
  EXTI_Init(&EXTI_InitStructure);

  /* Enable and set EXTI1 Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = EXTI1_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPriority = 0x00;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}

void EXTI1_IRQHandler(void)
{
  if(EXTI_GetITStatus(EXTI_Line1) != RESET)
  {

            /* Toggle LED2 */
HK_EVAL_LEDToggle(LED2);

/* Clear the EXTI line 0 pending bit */
EXTI_ClearITPendingBit(EXTI_Line1);
  }
}

/**
  * @brief  This function handles External line 4 interrupt request.
  * @param  None
  * @retval None
  */
void EXTI4_IRQHandler(void)
{
  if(EXTI_GetITStatus(EXTI_Line4) != RESET)
  {
/* Toggle LED1 */
HK_EVAL_LEDToggle(LED1);

/* Clear the EXTI line 4 pending bit */
EXTI_ClearITPendingBit(EXTI_Line4);
  }
}

#ifdef  USE_FULL_ASSERT

/**
  * @brief  Reports the name of the source file and the source line number
  *       where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t* file, uint32_t line)
{
  /* User can add his own implementation to report the file name and line number,
   ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */

  /* Infinite loop */
  while (1)
  {
  }
}
#endif

/**
  * @}
  */

/**
  * @}
  */