DM8168 EDMA

你好，

你看的是哪个版本的DVR RDK？我看了一下，v3.0以后都没有你说的这两个函数调用了。建议你还是更新一下软件。

Utils_dmaCopy2D利用了EDMA实现了两维的数据复制。

是这个版本的hdvpss_01_00_01_37_patched，

Void CaptureLink_drvMergeData_Yuv422i(CaptureLink_Obj * pObj,
UInt32 queId,
UInt32 queChId,
FVID2_Frame *pFrame)
{
Int32 status;
System_LinkChInfo* pChInfo = &pObj->info.queInfo[queId].chInfo[queChId];
CaptureLink_ChObj *pChObj;
pChObj = &pObj->chObj[queId][queChId];
Int32 width, height, pitch0;
Int32 startx, starty;
width = pChInfo->width;
height = pChInfo->height;
pitch0 = pChInfo->pitch[0];
startx = pChInfo->startX;
starty = pChInfo->startY;

if((width<=0)||(height<=0)||(pitch0<=0))
{
Vps_printf("### Cap: width %d, height %d, pitch0 %d\n",\
width, height, pitch0);
return;
}
int *addr;
addr=pObj->tmpBufAddr;
Vps_printf("----->pitch0:%d,addr:0x%08x\n",pitch0,addr);
addr=pFrame->addr[0][0];
Vps_printf("----->pFrame->addr[0][0]:0x%08x\n",addr);

pChObj->Dma2DParam_Merge.destAddr[0] = pObj->tmpBufAddr;
pChObj->Dma2DParam_Merge.srcAddr[0] = pFrame->addr[0][0]+pitch0;
pChObj->Dma2DParam_Merge.width = width;
pChObj->Dma2DParam_Merge.height = height/2;
pChObj->Dma2DParam_Merge.destPitch[0] = pitch0;
pChObj->Dma2DParam_Merge.srcPitch[0] = pitch0*2;

pChObj->Dma2DParam_Merge.dataFormat = FVID2_DF_YUV422I_YUYV;
pChObj->Dma2DParam_Merge.srcStartX = startx;
pChObj->Dma2DParam_Merge.srcStartY = starty;
pChObj->Dma2DParam_Merge.destStartX = startx;
pChObj->Dma2DParam_Merge.destStartY = starty/2;

status = Utils_dmaCopy2D(&pObj->dmaObj, &pChObj->Dma2DParam_Merge, 1);
UTILS_assert(status==FVID2_SOK);

pChObj->Dma2DParam_Merge.destAddr[0] = pFrame->addr[0][0]+pitch0;
pChObj->Dma2DParam_Merge.srcAddr[0] = pFrame->addr[0][0]+pitch0*2;
pChObj->Dma2DParam_Merge.width = width;
pChObj->Dma2DParam_Merge.height = height/2-1;
pChObj->Dma2DParam_Merge.destPitch[0] = pitch0;
pChObj->Dma2DParam_Merge.srcPitch[0] = pitch0*2;

pChObj->Dma2DParam_Merge.dataFormat = FVID2_DF_YUV422I_YUYV;
pChObj->Dma2DParam_Merge.srcStartX = startx;
pChObj->Dma2DParam_Merge.srcStartY = starty;
pChObj->Dma2DParam_Merge.destStartX = startx;
pChObj->Dma2DParam_Merge.destStartY = starty/2;

status = Utils_dmaCopy2D(&pObj->dmaObj, &pChObj->Dma2DParam_Merge, 1);
UTILS_assert(status==FVID2_SOK);

pChObj->Dma2DParam_Merge.destAddr[0] = pFrame->addr[0][0]+pitch0*height/2;
pChObj->Dma2DParam_Merge.srcAddr[0] = pObj->tmpBufAddr;
pChObj->Dma2DParam_Merge.width = width;
pChObj->Dma2DParam_Merge.height = height/2;
pChObj->Dma2DParam_Merge.destPitch[0] = pitch0;
pChObj->Dma2DParam_Merge.srcPitch[0] = pitch0;

pChObj->Dma2DParam_Merge.dataFormat = FVID2_DF_YUV422I_YUYV;
pChObj->Dma2DParam_Merge.srcStartX = startx;
pChObj->Dma2DParam_Merge.srcStartY = starty/2;
pChObj->Dma2DParam_Merge.destStartX = startx;
pChObj->Dma2DParam_Merge.destStartY = starty;

status = Utils_dmaCopy2D(&pObj->dmaObj, &pChObj->Dma2DParam_Merge, 1);
if(status==FVID2_SOK)
UTILS_assert(status==FVID2_SOK);
}

我计算了一下参数设置如下：

没有搞懂这样做的目的？

你好，

请参考mcfw下的capture link相关代码，而不是hdvpss下面的。

哦！抱歉是MCFW下的写错了，是DVR_RDK ，

请教一下 Utils_dmaCopy2D(&pObj->dmaObj, &pChObj->Dma2DParam_Merge, 1);

函数，就是应用EDMA将Frame从我设置的源地址复制到目的地址是吗？是否是连续传送呢？

另外SRCBIDX和DSTBIDX的作用是什么呢？