嵌入式开发之8127---DM8127如何利用EDMA搬移数据

--------------qq：1327706646

---------------------author：midu

-------------------------------datetime：2013-10-20

1.在sw_osd_ti_dmaOpt.c和sw_osd_ti_dma.c中涉及到了DMA的相关设置，但所有的API都是需要传递一个handle进去，而且所有的API都以SWOSD开头，但我不清楚这个handle需要怎么初始化，如何用在我的算法中。

2,在...ipnc_rdkipnc_mcfwmcfwsrc_bios6links_c6xdspvavalink_alg.c中的VaLink_algCopyFrames()中调用了EDMA.其中有

/* copy the frame */    

edmaWidth  = pObj->inQueInfo.chInfo[0].width;     

edmaHeight = pObj->inQueInfo.chInfo[0].height;            

  /* copy Y plane */     

 DM81XX_EDMA3_setParams(VA_LINK_EDMA3_CH_ID,    // chId                                    

                                                  VA_LINK_EDMA3_QUEUE_ID,    // dmaQueue                                   

                                                  (UInt32)pFullFrame->addr[0][0],  // srcAddr                                   

                                                  (UInt32)pEmptyFrame->addr[0][0], // dstAddr                                   

                                                    edmaWidth,              // edmaWidth                                   

                                                   edmaHeight,             // edmaHeight                                   

                                                   edmaWidth,              // srcLineOffset                                   

                                                   edmaWidth);             // dstLineOffset

 /* Trigger the edma transfer */     

 DM81XX_EDMA3_triggerTransfer(VA_LINK_EDMA3_CH_ID);         

 pEmptyFrame->timeStamp = pFullFrame->timeStamp;

于是我将该段代码添加到了Alglink_priv.c中

Int32 AlgLink_algProcessData(AlgLink_Obj * pObj)

{

    extern unsigned char *frame_buffer; //frame_buffer大小为2048*1280；开辟在在DDR 的SR2上

    unsigned char * current_frame;

     unsigned char * temp;

     int edmaWidth = 2048; 

     int edmaHeight = 1280;

     UInt32 frameId, status;    

     System_LinkInQueParams *pInQueParams;    

     FVID2_Frame *pFrame;

    FVID2_FrameList frameList;

     pInQueParams = &pObj->createArgs.inQueParams;   

    System_getLinksFullFrames(pInQueParams->prevLinkId,                             

    pInQueParams->prevLinkQueId, &frameList);

    if (frameList.numFrames)   

     {       

  /* SCD should be done first as it requires to operate on raw YUV */    

     if (pObj->createArgs.enableSCDAlg)      {            

             status =   AlgLink_ScdalgProcessData(&pObj->scdAlg, &frameList, &pObj->outObj[0].bufOutQue);

            if (status == FVID2_SOK)             {               

                 /* Send-out the output bitbuffer */                

               System_sendLinkCmd(pObj->createArgs.outQueParams.nextLink,                                   

                SYSTEM_CMD_NEW_DATA);  

        }

     }

        for(frameId=0; frameId<frameList.numFrames; frameId++)         {            

        pFrame = frameList.frames[frameId];

            if(pFrame->channelNum >= pObj->inQueInfo.numCh)                

             continue;

//*************************************add my alg ****************************//

/* copy the frame */    

edmaWidth  = pObj->inQueInfo.chInfo[0].width;    

edmaHeight = pObj->inQueInfo.chInfo[0].height;           

  /* copy Y plane */    

DM81XX_EDMA3_setParams(VA_LINK_EDMA3_CH_ID,    // chId                                    

                                                  VA_LINK_EDMA3_QUEUE_ID,    // dmaQueue                                  

                                                  (UInt32)pFrame->addr[0][0],  // srcAddr                                  

                                                  (UInt32)(frame_buffer), // dstAddr                                  

                                                    edmaWidth,              // edmaWidth                                   

                                                   edmaHeight,             // edmaHeight                                  

                                                   edmaWidth,              // srcLineOffset                                  

                                                   edmaWidth);             // dstLineOffset

/* Trigger the edma transfer */    

DM81XX_EDMA3_triggerTransfer(VA_LINK_EDMA3_CH_ID);        

pEmptyFrame->timeStamp = pFullFrame->timeStamp;

//判断数据搬移是否出错

  current_frame = (unsigned char *)pFrame->addr[0][0];

   temp = frame_buffer;

  for(i=0;i<2048*1280;i++){

   if(*temp !=*current_frame)

    Vps_printf("wrong!!!!!!!");

   current_frame++;

  temp++;

}

 //********************************************************************************//

            // do SW OSD            

 if (pObj->createArgs.enableOSDAlg)             {    

            AlgLink_OsdalgProcessFrame(&pObj->osdAlg, pFrame);            

              }        

          }        

     System_putLinksEmptyFrames(pInQueParams->prevLinkId,                                   

      pInQueParams->prevLinkQueId, &frameList);   

  }

       return FVID2_SOK;

 }

编译通过后发现EDMA源地址和目的地址的元素不一致，帧大小为2048*1280没有错，而且我跑的是fullfeature,valink是没有跑的；请问是我的DMA哪里设置不对吗？有谁在8127上用过EDMA的啊？求各位大神指点，小弟在此谢过了！！！

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