static void DMA2D_ConvertColor(void * pSrc, void * pDst, uint32_t PixelFormatSrc, uint32_t PixelFormatDst, uint32_t NumItems)
{
/* Set up mode */
DMA2D->CR = 0x00010000UL | (1 << 9); /* Control Register (Memory to memory with pixel format conversion and TCIE) */
/* Set up pointers */
DMA2D->FGMAR = (uint32_t)pSrc; /* Foreground Memory Address Register (Source address) */
DMA2D->OMAR = (uint32_t)pDst; /* Output Memory Address Register (Destination address) */
/* Set up offsets */
DMA2D->FGOR = 0; /* Foreground Offset Register (Source line offset) */
DMA2D->OOR = 0; /* Output Offset Register (Destination line offset) */
/* Set up pixel format */
DMA2D->FGPFCCR = PixelFormatSrc; /* Foreground PFC Control Register (Defines the input pixel format) */
DMA2D->OPFCCR = PixelFormatDst; /* Output PFC Control Register (Defines the output pixel format) */
/* Set up size */
DMA2D->NLR = (uint32_t)(NumItems << 16) | 1; /* Number of Line Register (Size configuration of area to be transfered) */
/* Execute operation */
DMA2D->CR |= DMA2D_CR_START;

while (DMA2D->CR & DMA2D_CR_START)
{
}
}

void HAL_DMA2D_MspInit(DMA2D_HandleTypeDef *hdma2d)
{  
  /* Enable peripheral */
  __HAL_RCC_DMA2D_CLK_ENABLE();  
}

void HAL_LTDC_MspInit(LTDC_HandleTypeDef *hltdc)
{  
  GPIO_InitTypeDef GPIO_Init_Structure;
  
  /* Enable peripherals and GPIO Clocks */  
  /* Enable the LTDC Clock */
  __HAL_RCC_LTDC_CLK_ENABLE();
....
  /* Set LTDC Interrupt to the lowest priority */
  HAL_NVIC_SetPriority(LTDC_IRQn, 0xF, 0);
  
  /* Enable LTDC Interrupt */
  HAL_NVIC_EnableIRQ(LTDC_IRQn);
}