DMA2D Private Functions

Functions
static void	DMA2D_SetConfig (DMA2D_HandleTypeDef *hdma2d, uint32_t pdata, uint32_t DstAddress, uint32_t Width, uint32_t Height)
	Set the DMA2D transfer parameters. More...

Detailed Description

Function Documentation

DMA2D_SetConfig()

static void DMA2D_SetConfig ( DMA2D_HandleTypeDef *  hdma2d, uint32_t  pdata, uint32_t  DstAddress, uint32_t  Width, uint32_t  Height  )

static

Set the DMA2D transfer parameters.

Parameters

hdma2d	Pointer to a DMA2D_HandleTypeDef structure that contains the configuration information for the specified DMA2D.
pdata	The source memory Buffer address
DstAddress	The destination memory Buffer address
Width	The width of data to be transferred from source to destination.
Height	The height of data to be transferred from source to destination.

Return values

HAL

status

Definition at line 1933 of file stm32l4xx_hal_dma2d.c.

{
  uint32_t tmp;
  uint32_t tmp1;
  uint32_t tmp2;
  uint32_t tmp3;
  uint32_t tmp4;

  /* Configure DMA2D data size */
  MODIFY_REG(hdma2d->Instance->NLR, (DMA2D_NLR_NL|DMA2D_NLR_PL), (Height| (Width << DMA2D_NLR_PL_Pos)));

  /* Configure DMA2D destination address */
  WRITE_REG(hdma2d->Instance->OMAR, DstAddress);

  /* Register to memory DMA2D mode selected */
  if (hdma2d->Init.Mode == DMA2D_R2M)
  {
    tmp1 = pdata & DMA2D_OCOLR_ALPHA_1;
    tmp2 = pdata & DMA2D_OCOLR_RED_1;
    tmp3 = pdata & DMA2D_OCOLR_GREEN_1;
    tmp4 = pdata & DMA2D_OCOLR_BLUE_1;

    /* Prepare the value to be written to the OCOLR register according to the color mode */
    if (hdma2d->Init.ColorMode == DMA2D_OUTPUT_ARGB8888)
    {
      tmp = (tmp3 | tmp2 | tmp1| tmp4);
    }
    else if (hdma2d->Init.ColorMode == DMA2D_OUTPUT_RGB888)
    {
      tmp = (tmp3 | tmp2 | tmp4);
    }
    else if (hdma2d->Init.ColorMode == DMA2D_OUTPUT_RGB565)
    {
      tmp2 = (tmp2 >> 19U);
      tmp3 = (tmp3 >> 10U);
      tmp4 = (tmp4 >> 3U );
      tmp  = ((tmp3 << 5U) | (tmp2 << 11U) | tmp4);
    }
    else if (hdma2d->Init.ColorMode == DMA2D_OUTPUT_ARGB1555)
    {
      tmp1 = (tmp1 >> 31U);
      tmp2 = (tmp2 >> 19U);
      tmp3 = (tmp3 >> 11U);
      tmp4 = (tmp4 >> 3U );
      tmp  = ((tmp3 << 5U) | (tmp2 << 10U) | (tmp1 << 15U) | tmp4);
    }
    else /* Dhdma2d->Init.ColorMode = DMA2D_OUTPUT_ARGB4444 */
    {
      tmp1 = (tmp1 >> 28U);
      tmp2 = (tmp2 >> 20U);
      tmp3 = (tmp3 >> 12U);
      tmp4 = (tmp4 >> 4U );
      tmp  = ((tmp3 << 4U) | (tmp2 << 8U) | (tmp1 << 12U) | tmp4);
    }
    /* Write to DMA2D OCOLR register */
    WRITE_REG(hdma2d->Instance->OCOLR, tmp);
  }
  else /* M2M, M2M_PFC or M2M_Blending DMA2D Mode */
  {
    /* Configure DMA2D source address */
    WRITE_REG(hdma2d->Instance->FGMAR, pdata);
  }
}