Hello guys, I'm working with the STM32L0538-Discovery board because I want to use the e-paper display. The demo code works well but I struggle to implement mine. My programm is just displaying a character but the epaper never refresh.

[MaxMag]

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_SPI1_Init();
  MX_SPI2_Init();
  MX_TSC_Init();
  MX_USART1_UART_Init();
  MX_USB_PCD_Init();
  /* USER CODE BEGIN 2 */
  BSP_EPD_Init();
 
  /* USER CODE END 2 */
 
  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
	BSP_EPD_DisplayChar(0, 0, 31);
	BSP_EPD_RefreshDisplay();
    /* USER CODE END WHILE */
 
    /* USER CODE BEGIN 3 */
  }
  /* USER CODE END 3 */
}

The MX configuration is let by default