stm32f051r8t6 TIM14 interrupt handler not working after reset

Question

I am using STM32CubeMX to generate code into IAR, and I am using a stm32f051r8t6 microcontroller, The problem I am having is that when first loading the code onto the chip, it all works perfect, however after pressing restart on either the board or IAR debugger, the TIM14 interrupt handler is not entered, but as soon as I leave the debugger and enter again, it starts working until I press restart. Has anybody come across this problem before? My code is below

static void MX_TIM14_Init(void);

void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
  if (htim->Instance == TIM14)
  {
    HAL_GPIO_WritePin(GPIOA, USART1_TE_Pin, GPIO_PIN_SET);
  }
}

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_DMA_Init();
  MX_ADC_Init();
  MX_USART1_UART_Init();
  MX_USART2_UART_Init();
  MX_TIM14_Init();

  HAL_TIM_Base_Start(&htim14);
  /* USER CODE END 2 */

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

/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}
static void MX_TIM14_Init(void)
{

 /* USER CODE BEGIN TIM14_Init 0 */

 /* USER CODE END TIM14_Init 0 */

 /* USER CODE BEGIN TIM14_Init 1 */

 /* USER CODE END TIM14_Init 1 */
 htim14.Instance = TIM14;
 htim14.Init.Prescaler = 47999;
 htim14.Init.CounterMode = TIM_COUNTERMODE_UP;
 htim14.Init.Period = 1;
 htim14.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
 htim14.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_ENABLE;
 if (HAL_TIM_Base_Init(&htim14) != HAL_OK)
 {
  Error_Handler();
 }
 /* USER CODE BEGIN TIM14_Init 2 */

 /* USER CODE END TIM14_Init 2 */

 }

Answer 1

You need to add to enable the interrupt.

  MX_TIM14_Init();

  HAL_NVIC_EnableIRQ(TIM14_IRQn);   // <----------------------------

  HAL_TIM_Base_Start(&htim14);

Just check the IRQn TIM14 UG event number. They are defined in the IRQn_Type enum type defined in the STM32F___.h file where ___ is the model of your micro (you will find it in the include folder)