[嵌入式]STM32 HAL库软件中断

功能：软件中断实现LED每隔2s翻转一次

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{
  /* USER CODE BEGIN 1 */

  /* USER CODE END 1 */

  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  /* USER CODE BEGIN 2 */
	
	EXTI_HandleTypeDef hexti;
	EXTI_ConfigTypeDef pExtiConfig;
	
	pExtiConfig.Line = EXTI_LINE_0;
	pExtiConfig.Mode = EXTI_MODE_INTERRUPT;
	
	HAL_EXTI_SetConfigLine(&hexti, &pExtiConfig);
	
	/* EXTI interrupt init*/
  HAL_NVIC_SetPriority(EXTI0_IRQn, 3, 0);
  HAL_NVIC_EnableIRQ(EXTI0_IRQn);

  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */
		HAL_Delay(2000);
		HAL_EXTI_GenerateSWI(&hexti);
		

    /* USER CODE BEGIN 3 */
  }
  /* USER CODE END 3 */
}

/**
  * @brief GPIO Initialization Function
  * @param None
  * @retval None
  */
static void MX_GPIO_Init(void)
{
  GPIO_InitTypeDef GPIO_InitStruct = {0};

  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOH_CLK_ENABLE();
  __HAL_RCC_GPIOB_CLK_ENABLE();

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(GPIOB, GPIO_PIN_1, GPIO_PIN_SET);

  /*Configure GPIO pin : PB1 */
  GPIO_InitStruct.Pin = GPIO_PIN_1;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_OD;
  GPIO_InitStruct.Pull = GPIO_PULLUP;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

}

/**
  * @brief This function handles EXTI line0 interrupt.
  */
void EXTI0_IRQHandler(void)
{
  /* USER CODE BEGIN EXTI0_IRQn 0 */

  /* USER CODE END EXTI0_IRQn 0 */
  HAL_GPIO_EXTI_IRQHandler(GPIO_PIN_0);
  /* USER CODE BEGIN EXTI0_IRQn 1 */

  /* USER CODE END EXTI0_IRQn 1 */
}

void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
{
	HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_1);
}

或者可以用void HAL_EXTI_IRQHandler(EXTI_HandleTypeDef *hexti)处理中断

void Hexti_PendingCallback(void)
{
	HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_1);
}

/* USER CODE END 0 */

EXTI_HandleTypeDef hexti;

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{
  /* USER CODE BEGIN 1 */

  /* USER CODE END 1 */

  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  /* USER CODE BEGIN 2 */
	
	EXTI_ConfigTypeDef pExtiConfig;
	
	pExtiConfig.Line = EXTI_LINE_0;
	pExtiConfig.Mode = EXTI_MODE_INTERRUPT;
	
	HAL_EXTI_SetConfigLine(&hexti, &pExtiConfig);
	HAL_EXTI_RegisterCallback(&hexti, HAL_EXTI_COMMON_CB_ID, Hexti_PendingCallback);//注册回调函数
	
	/* EXTI interrupt init*/
  HAL_NVIC_SetPriority(EXTI0_IRQn, 3, 0);
  HAL_NVIC_EnableIRQ(EXTI0_IRQn);

  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */
		HAL_Delay(2000);
		HAL_EXTI_GenerateSWI(&hexti);
		

    /* USER CODE BEGIN 3 */
  }
  /* USER CODE END 3 */
}

/**
  * @brief GPIO Initialization Function
  * @param None
  * @retval None
  */
static void MX_GPIO_Init(void)
{
  GPIO_InitTypeDef GPIO_InitStruct = {0};

  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOH_CLK_ENABLE();
  __HAL_RCC_GPIOB_CLK_ENABLE();

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(GPIOB, GPIO_PIN_1, GPIO_PIN_SET);

  /*Configure GPIO pin : PB1 */
  GPIO_InitStruct.Pin = GPIO_PIN_1;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_OD;
  GPIO_InitStruct.Pull = GPIO_PULLUP;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

}

/**
  * @brief This function handles EXTI line0 interrupt.
  */
void EXTI0_IRQHandler(void)
{
	HAL_EXTI_IRQHandler(&hexti); 
}