DM3730: IVA2.2 DSP and EDMA3 and McBSP in 3D mode

Hi Guys,

Hope you don't mind me jumping in here, but this thread was very useful for me, and I've a small query with my EDMA config on the MCBSP of the DM3730

I managed to get the McBSP EDMA running correctly, however I'm looking to transfer audio and kick off an interrupt after a given number of samples, and often these are much greater than the FIFO of the given McBSP.  As such, I'm trying to modify my PARAM set to do a 3D transfer where

A: 2 32-bit Samples (i.e. 1 Left sample, 1 Right sample)

B: 4 Samples per channel (i.e. 8)

C: Number of samples per frame/4 (i.e. we have N/4 transfers per frame, where a frame may be up to 2048 samples per channel etc ...)

And then this goes into a Ping/Pong buffer in the following mode (this lives in a general function, so excuse the random variables):

Basically, the question here is I'm not sure how to do intermediate chaining in the ping/pong buffer so I get an interrupt after the Ping buffer fills (which should happen after CCNT A/B transfer).  Of course, it was working with A/B before I started breaking it. ;)

I /think/ I'm nto that far off, but I'm not really sure how the chaining pulls together here.

All help gratefully received on this one!

cheers,

p.

  ACNT = 2 * sizeof(int);
  BCNT = 4;
  CCNT = (config->Threshold)/4;

mcbsp_params_ping.ACNT = ACNT; //sizeof(unsigned int);
  mcbsp_params_ping.BCNT = BCNT; //4;//config->Threshold;
  mcbsp_params_ping.CCNT = CCNT; //(config->Threshold)/4;//1
  mcbsp_params_ping.SRC = (unsigned int *)config->SrcPing;//(int *) RXBUFF2;//
  mcbsp_params_ping.DST = (unsigned int *)config->DstPing;
 
  if(config->Direction == MCBSP_INPUT)
  {
      mcbsp_params_ping.SBIDX = 0;//sizeof(int);
      mcbsp_params_ping.DBIDX = sizeof(unsigned int);
     
      mcbsp_params_ping.SCIDX = 0;
      mcbsp_params_ping.DCIDX = sizeof(unsigned int) * 4; //0;
  }
  else
  {
      mcbsp_params_ping.SBIDX = sizeof(unsigned int);
      mcbsp_params_ping.DBIDX = 0;//sizeof(int);
     
      mcbsp_params_ping.SCIDX = sizeof(unsigned int) * 4;//0;
      mcbsp_params_ping.DCIDX = 0;
  }
 
  mcbsp_params_ping.SAM = 0;
  mcbsp_params_ping.DAM = 0;
  mcbsp_params_ping.TCC = config->TCC_Ping;
  mcbsp_params_ping.TCCMODE = 0;
  mcbsp_params_ping.FWID = 0x2;
  mcbsp_params_ping.TCINTEN = 1;
  mcbsp_params_ping.ITCINTEN = 0;
  mcbsp_params_ping.ITCCHEN = 1;
  mcbsp_params_ping.BCNTRLD = BCNT;//0;//sizeof(RXBUFF1)/sizeof(int);
  mcbsp_params_ping.LINK = config->ChanPong << 5; //mcbsp2_ping << 5;
  mcbsp_params_ping.STATIC = 0;
  mcbsp_params_ping.SYNCDIM=1;
 
  mcbsp_params_pong.ACNT = ACNT; //sizeof(int);
  mcbsp_params_pong.BCNT = BCNT; //4;//config->Threshold;
  mcbsp_params_pong.CCNT = CCNT; //(config->Threshold)/4;//1;
  mcbsp_params_pong.SRC = (unsigned int *)config->SrcPong;
  mcbsp_params_pong.DST = (unsigned int *)config->DstPong;
 
  if(config->Direction == MCBSP_INPUT)
  {
      mcbsp_params_pong.SBIDX = 0;//sizeof(int);
      mcbsp_params_pong.DBIDX = sizeof(unsigned int);
     
      mcbsp_params_pong.SCIDX = 0;
    mcbsp_params_pong.DCIDX = sizeof(unsigned int)* 4;//0;
  }
  else
  {
      mcbsp_params_pong.SBIDX = sizeof(unsigned int);
      mcbsp_params_pong.DBIDX = 0;//sizeof(int);
     
      mcbsp_params_pong.SCIDX = sizeof(unsigned int)* 4;//0;
    mcbsp_params_pong.DCIDX = 0;
  }
 
  mcbsp_params_pong.SAM = 0;
  mcbsp_params_pong.DAM = 0;
  mcbsp_params_pong.TCC = config->TCC_Pong;
  mcbsp_params_pong.TCCMODE = 0;
  mcbsp_params_pong.FWID = 0x2;
  mcbsp_params_pong.TCINTEN = 1;
  mcbsp_params_pong.ITCINTEN = 0;
  mcbsp_params_pong.ITCCHEN = 1;
  mcbsp_params_pong.BCNTRLD = BCNT;//0;
  mcbsp_params_pong.LINK = config->ChanPing2 << 5;
  mcbsp_params_pong.STATIC=0;
  mcbsp_params_pong.SYNCDIM=1;
 
 
  mcbsp_params_ping2.ACNT = ACNT; //sizeof(unsigned int);
  mcbsp_params_ping2.BCNT = BCNT; //4;//config->Threshold;
  mcbsp_params_ping2.CCNT = CCNT; //(config->Threshold)/4;//1;
  mcbsp_params_ping2.SRC = (unsigned int *)config->SrcPing;//(int *) RXBUFF2;//
  mcbsp_params_ping2.DST = (unsigned int *)config->DstPing;
 
  if(config->Direction == MCBSP_INPUT)
  {
      mcbsp_params_ping2.SBIDX = 0;//sizeof(int);
      mcbsp_params_ping2.DBIDX = sizeof(unsigned int);
     
      mcbsp_params_ping2.DCIDX = 4*sizeof(unsigned int);//0;
    mcbsp_params_ping2.SCIDX = 0;
  }
  else
  {
      mcbsp_params_ping2.SBIDX = sizeof(unsigned int);
      mcbsp_params_ping2.DBIDX = 0;//sizeof(int);
     
      mcbsp_params_ping2.DCIDX = 0;
      mcbsp_params_ping2.SCIDX = 4*sizeof(unsigned int);//0;
  }

  mcbsp_params_ping2.SAM = 0;
  mcbsp_params_ping2.DAM = 0;
  mcbsp_params_ping2.TCC = config->TCC_Ping;
  mcbsp_params_ping2.TCCMODE = 0;
  mcbsp_params_ping2.FWID = 0x2;
  mcbsp_params_ping2.TCINTEN = 1;
  mcbsp_params_ping2.ITCINTEN = 0;
  mcbsp_params_ping2.ITCCHEN = 1;
  mcbsp_params_ping2.BCNTRLD = BCNT;//0;//sizeof(RXBUFF1)/sizeof(int);
  mcbsp_params_ping2.LINK = config->ChanPong << 5; //mcbsp2_ping << 5;
  mcbsp_params_ping2.STATIC = 0;
  mcbsp_params_ping2.SYNCDIM=1;