IWR6843ISK: Porting OOB data through CAN in IWR6843ISK

Hi team,

I tried to send the OOB data through the CAN-FD in the 6843 device.

I am able to visualize the data through the Peak CAN viewer. Only the frame header is padded with 8 bytes of 'CC', but not the TLV header or the TLV data.

Please refer the below image of the CAN trace file.

Can you explain why this happened?

I found the code snippet for the calculation of pad-size in the canfd.c file 

location: sdk_v3.6.0.0_installation_directory\ti\mmwave_sdk_03_06_00_00-LTS\packages\ti\drivers\canfd\src\canfd.c

    for(index = 0U ; index < 16U ; index++)
                {
                    if(dataLength <= ptrCanFdMCB->mcanDataSize[index])
                    {
                        txBuffElem.dlc = index;
                        padSize = ptrCanFdMCB->mcanDataSize[index] - dataLength;
                        break;
                    }
                }
                txBuffElem.dlc = index;
                //changes
                if (index == 16)
                {
                    *errCode = CANFD_EINVAL;
                    retVal = MINUS_ONE;
                }
                else
                {
                    /* Pad the unused data in payload */

                    index = dataLength;
                    while (padSize != 0)
                    {
                        txBuffElem.data[index++] = (uint8_t)0xCCU;
                        padSize--;
                    }

It would be helpful if you explain this part of the code also.

Thanks