06 FreeRTOS Tutorial: Handling Interrupt

이번 시간에는 STM32 Discovery 보드에서 파란 버튼을 눌렀을때 간단한 UART 동작이 실행되는 것을 해볼 것 입니다.

파란 버튼을 누르면 "Hello EXTI(External Interrupt)" 가 Terminal에 출력 됩니다. 

이를 FreeRTOS 환경에서 Interrupt Task를 만들어서 실행해봅니다.

 

교육영상

https://www.youtube.com/watch?v=0lX6OERAwsM

 

영상을 보기에 앞서 GPIO 설정과 Interrupt 설정을 해줘야 합니다.

https://www.plainy.co.kr/bbs/board.php?bo_table=stm32_lecture&wr_id=17 다음의 사이트를 참고하세요

 

STM32CubeMX가 꼭 필요합니다.

 

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */

TaskHandle_t Led_GateKeeperHandle = NULL;
TaskHandle_t myTask2Handle = NULL;
TaskHandle_t myIntTaskHandle = NULL;

void Led_GateKeeper(void *pvParameters)
{

	int count = (int*) pvParameters;


	//TickType_t xDelay = 500 / portTICK_PERIOD_MS;
	TickType_t xDelay = pdMS_TO_TICKS(1000);
	TickType_t myLastUnblock;
	myLastUnblock = xTaskGetTickCount();
	char* text = "Hello STM32\r\n";

		for(;;)
		{

			HAL_GPIO_WritePin(GPIOD, LD4_Pin|LD3_Pin|LD5_Pin|LD6_Pin, GPIO_PIN_RESET);
			//vTaskDelay(xDelay); //ms가 아닌 number of ticks, (the number of CPU takes that the kernel runs on
			
			vTaskDelayUntil( &myLastUnblock, xDelay );

			HAL_GPIO_WritePin(GPIOD, LD4_Pin|LD3_Pin|LD5_Pin|LD6_Pin, GPIO_PIN_SET);
			//vTaskDelay(xDelay);
			vTaskDelayUntil( &myLastUnblock, xDelay );



		}
}


void myIntTask(void *p){

	while(1){
		char* text = "Hello EXTI\r\n";

		vTaskSuspend(NULL); // suspend itself
		HAL_UART_Transmit(&huart2, (uint8_t *)text,strlen(text) , 10);


	}



}

/* USER CODE END 0 */

/**
  * @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();
  MX_I2C1_Init();
  MX_I2S3_Init();
  MX_SPI1_Init();
  MX_USART2_UART_Init();
  /* USER CODE BEGIN 2 */

  int pass = 8;


  xTaskCreate(Led_GateKeeper,					//Task Pointer
		  	  (const char* const)"led_gate",	//Task Name
			  configMINIMAL_STACK_SIZE + 800,			//Stack Depth
			  (void *)pass,								//Parameters to pass to task
			  2,								//Task Priority
			  &Led_GateKeeperHandle);								//Pass Handle to created task



  xTaskCreate(myIntTask,					//Task Pointer
		  	  (const char* const)"IntTask",	//Task Name
			  configMINIMAL_STACK_SIZE + 800,			//Stack Depth
			  (void *)0,								//Parameters to pass to task
			  2,								//Task Priority
			  &myIntTaskHandle);


}

/* USER CODE BEGIN 4 */

void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
{


	BaseType_t checkIfYielRequired;
	checkIfYielRequired = xTaskResumeFromISR(myIntTaskHandle);
	portYIELD_FROM_ISR(checkIfYielRequired);



}

/* USER CODE END 4 */
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/