还是这种的API调用起来省事
/**
* @brief DMA2D conversion from YCbCr (video output) to RGB (Display frame buffer)
* @param pSrc : Source buffer pointer
* @param xsize: Horizontal size of the frame buffer
* @param ysize: Vertical size of the frame buffer
* @retval None
*/
void DMA2D_CopyBuffer_YCbCr_To_RGB(uint32_t *pSrc, uint16_t xsize, uint16_t ysize)
{
uint32_t inputLineOffset = 0;
uint32_t destination;
U32 BufferSize;
U32 regValue, regMask;
/* Wait if there is a transfer in progress */
_DMA2D_ExecOperation();
/* Take the TransferInProgress flag */
TransferInProgress = 1;
/* Get the buffer size */
BufferSize = _GetBufferSize(0);
/* Calculate all the needed DMA2D inputs */
destination = _aAddr[0] + BufferSize * _aBufferIndex[0];
inputLineOffset = xsize % 16;
if(inputLineOffset != 0)
{
inputLineOffset = 16 - inputLineOffset;
}
regValue = DMA2D_INPUT_YCBCR | (DMA2D_REPLACE_ALPHA << 16) |
(DMA2D_REGULAR_ALPHA << 20)|
(DMA2D_RB_REGULAR << 21) |
(0xFFU << 24) |
(DMA2D_CSS_420 << 18);
regMask = DMA2D_BGPFCCR_CM | DMA2D_BGPFCCR_AM | DMA2D_BGPFCCR_ALPHA | DMA2D_BGPFCCR_AI | DMA2D_BGPFCCR_RBS | DMA2D_FGPFCCR_CSS;
/* Setup DMA2D Configuration */
DMA2D->CR = 0x00010000UL | (1 << 9);
DMA2D->OPFCCR = DMA2D_OUTPUT_RGB565;
DMA2D->OOR = 640 - xsize;
DMA2D->OPFCCR |= (DMA2D_REGULAR_ALPHA << 20);
DMA2D->OPFCCR |= (DMA2D_RB_REGULAR << 21);
DMA2D->FGPFCCR |= (regMask & regValue);
DMA2D->FGOR = inputLineOffset;
DMA2D->NLR = (U32)(xsize << 16) | (U16)ysize;
DMA2D->OMAR = (U32)destination;
DMA2D->FGMAR = (U32)pSrc;
/* Start the transfer, and enable the transfer complete IT */
DMA2D->CR |= (1|DMA2D_IT_TC);
/* Wait for the end of the transfer */
_DMA2D_ExecOperation();
} |
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