TMS570LC4357: DMA and DCAN: copying of IF3ARB register

Hello,

Is it possible to use DMA to copy IF3ARB, IF3DATA and IF3DATB registers during one DMA request?

Right now I have configured several DCAN MessageBoxes to receive different filtered messages (Each MessageBox receives different set of messages). I'm able to copy data of these messages, but I need to determine Ids of these messages as processing of these messages differs based on it.

My setting of IF3OBS register and DMA is:

// Read ARB, DATA A & B - 8 bytes */
        canREG1->IF3OBS = 0x1A;

        canREG1->IF3UEy[0]= 0xFFFFFFFF;
        canREG1->IF3UEy[1]= 0xFFFFFFFF;

dmaReqAssign(DMA_CH0,16);

        dma_control.SADD      = (uint32)(&(canREG1->IF3DATx[0]));
        //dma_control.SADD      = (uint32)(&(canREG1->IF3ARB[0]));
        dma_control.DADD      = DESTINATION_ADDRESS;
        dma_control.CHCTRL    = 0x00000000;
        dma_control.FRCNT     = 0x00000001;
        dma_control.ELCNT     = 0x00000002;
        //dma_control.ELCNT     = 0x00000001;
        dma_control.ELDOFFSET = 0x00000000;
        dma_control.ELSOFFSET = 0x00000000;
        dma_control.FRDOFFSET = 0x00000060;
        dma_control.FRSOFFSET = 0x00000000;
        dma_control.PORTASGN  = PORTB_READ_PORTA_WRITE;
        dma_control.RDSIZE    = ACCESS_32_BIT;
        dma_control.WRSIZE    = ACCESS_32_BIT;
        //dma_control.RDSIZE    = ACCESS_64_BIT;
        //dma_control.WRSIZE    = ACCESS_64_BIT;
        dma_control.TTYPE     = FRAME_TRANSFER;
        dma_control.ADDMODERD = ADDR_FIXED;
        dma_control.ADDMODEWR = ADDR_INC1;
        dma_control.AUTOINIT  = AUTOINIT_ON;

        dmaSetCtrlPacket(DMA_CH0, dma_control);

        dmaSetChEnable(DMA_CH0, DMA_HW);

But I can't figure out to what address should be source address pointed to so I can start by reading at IF3ARB register address. I have also problem with setting of Frame and Element counts as there is IF3MCTL register in between IF3ARB and IF3DATA registers. I would normally try to copy all these register but my destination memory is limited and I'm reaching hard limit.

Is copying of all of these registers possible in one DMA request or would I need to configure more DMA requests?

Thanks for your support,

Marek A.