Compiler/IWR6843ISK-ODS: how to transfer feature vectors to pc

Hello,

You will need to synchronize to the message header using the magic word as shown below, skip the header and then reach the actual data buffer. So first look for the header workds inj the output packet (i.e. the platform ID and magic word) to parse the header.

    /* Clear message to MSS */
    memset((void *)&message, 0, sizeof(MmwDemo_message));
    message.type = MMWDEMO_DSS2MSS_DETOBJ_READY;
    /* Header: */
    message.body.detObj.header.platform = 0xA1642;
    message.body.detObj.header.magicWord[0] = 0x0102;
    message.body.detObj.header.magicWord[1] = 0x0304;
    message.body.detObj.header.magicWord[2] = 0x0506;
    message.body.detObj.header.magicWord[3] = 0x0708;
    message.body.detObj.header.numDetectedObj = obj->numDetObj;
    message.body.detObj.header.version = MMWAVE_SDK_VERSION_BUILD |   //DEBUG_VERSION
        (MMWAVE_SDK_VERSION_BUGFIX << 8) |
        (MMWAVE_SDK_VERSION_MINOR << 16) |
        (MMWAVE_SDK_VERSION_MAJOR << 24);

    /* Set pointer to HSM buffer */
    ptrCurrBuffer = ptrHsmBuffer;
#if 1
    {
        int32_t idx, ik;
        gestureMetrics = (float*)ptrCurrBuffer;
        idx = 0;
        gestureMetrics[idx] = 1234; idx ++;
        gestureMetrics[idx] = gestureCntr++; idx ++; 
        gestureMetrics[idx] = gfeatures.pWtdoppler; idx ++;

Please note that the gesture demo is provided as-is to demonstrate a proof of concept only.

Regards

-Nitin

Hello Nitin

1. dss_main.c =>MmwDemo_dssSendProcessOutputToMSS 

{

      message.body.detObj.tlv[0].length = itemPayloadLen;

      message.body.detObj.tlv[0].type = MMWDEMO_OUTPUT_MSG_DETECTED_POINTS

      message.body.detObj.tlv[0].address = (uint32_t)ptrCurrBuffer;

     ==>My point of view:
     The TLV address (data buffer)has been saved in the message structure

    ...............................................................................................

    if (retVal == 0)
    {
        message.body.detObj.header.numTLVs = tlvIdx;
        /* Round up packet length to multiple of MMWDEMO_OUTPUT_MSG_SEGMENT_LEN */
        message.body.detObj.header.totalPacketLen = MMWDEMO_OUTPUT_MSG_SEGMENT_LEN *
            ((totalPacketLen + (MMWDEMO_OUTPUT_MSG_SEGMENT_LEN - 1)) / MMWDEMO_OUTPUT_MSG_SEGMENT_LEN);
        message.body.detObj.header.timeCpuCycles = Cycleprofiler_getTimeStamp();
        message.body.detObj.header.frameNumber = gMmwDssMCB.stats.frameStartIntCounter;
        message.body.detObj.header.subFrameNumber = gMmwDssMCB.subFrameIndx;
        if (MmwDemo_mboxWrite(&message) != 0) //write mailbox
        {
            retVal = -1;
        }
    }

}

2. mss_main.c : MmwDemo_mboxReadTask

{

retVal = Mailbox_read(gMmwMssMCB.peerMailbox, (uint8_t*)&message, sizeof(MmwDemo_message));

#if SEND_FEATURE_VECTORS_OUT_ON_UART
                /* Send the  feature vectors. */
                UART_writePolling(gMmwMssMCB.loggingUartHandle,
                    (uint8_t*)SOC_translateAddress(message.body.detObj.tlv[0].address, //data buffer addr
                        SOC_TranslateAddr_Dir_FROM_OTHER_CPU, NULL),
                    message.body.detObj.tlv[0].length);
#endif

}

I think the address of feature vector is : (uint8_t*)SOC_translateAddress(message.body.detObj.tlv[0].address,

so there is no need to skip the header and then reach the actual data buffer.Is this correct?