Embedded

1. 클럭설정

- TIM2 사용을 위해 APB1 Timer clocks 설정 - 72MHz

2. TIM2 설정

- Clock Source : Internal Clock

- Prescaler : 7200-1

- Counter Period : 10000-1

계산식 : 72MHz / 7200 / 10000 = 1

3. 코드

- 프로젝트 생성 후 htim2 타이머 인터럽트 시작 추가

- 정의된 HAL_TIM_PeriodElapsedCallback 사용 LED 토글

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_TIM2_Init();
  /* USER CODE BEGIN 2 */
  HAL_TIM_Base_Start_IT(&htim2);

  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */

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

void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
  if (htim->Instance == TIM2) /* 1s */
  {
    HAL_GPIO_TogglePin(LD2_GPIO_Port, LD2_Pin);
  }
}