microcontroller - STM32F7 46 G Discovery setting TIM2 to 1 second

I'm learning to programm on an STM32F7 46 G Discovery board using Eclipse as an IDE and STM32CubeMX. I'm trying to set a timer (currently TIM2) to one second without using an ISR. I'd like to get a tick from the timer every second.

Below is what I tried so far:

#include "main.h"
#include "stm32f7xx_hal.h"  

/* Private variables ---------------------------------------------------------*/

TIM_HandleTypeDef htim2;

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_TIM2_Init(void);
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim);    

int main(void)
{

    HAL_Init();
    SystemClock_Config(); 
    MX_GPIO_Init();
    MX_TIM2_Init();
    __TIM2_CLK_ENABLE();

   while (1)
   {
       HAL_TIM_PeriodElapsedCallback(&htim2);
   }

}

void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim2)
{
    if (htim2->Instance==TIM2) //check if the interrupt comes from TIM2
        {
           HAL_GPIO_TogglePin(ARDUINO_D2_GPIO_Port,ARDUINO_D2_Pin);
        }
}


static void MX_TIM2_Init(void) /* TIM2 init function */
{
  TIM_ClockConfigTypeDef sClockSourceConfig;
  TIM_MasterConfigTypeDef sMasterConfig;

  htim2.Instance = TIM2;
  htim2.Init.Prescaler = 41999; //max 65 536
  htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
  htim2.Init.Period = 1999;
  htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;

  htim2.Init.AutoReloadPreload = 0;
  HAL_TIM_Base_Init(&htim2);
  HAL_TIM_Base_Start(&htim2);

  if (HAL_TIM_Base_Init(&htim2) != HAL_OK)
  {
    _Error_Handler(__FILE__, __LINE__);
  }

  sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;


  if (HAL_TIM_ConfigClockSource(&htim2, &sClockSourceConfig) != HAL_OK)
  {
    _Error_Handler(__FILE__, __LINE__);
  }

  sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;



   if (HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig) != HAL_OK)
      {
        _Error_Handler(__FILE__, __LINE__);
      }
}

I know that the MCU runs at 42MHz which finally makes the clock run at 84MHz with PLL and I think I already set the Prescaler and the Period (to fix the autoreload time) values accordingly.

Thanks for answering and sorry for any English mistake (it's not my first language)