AWR1642BOOST: DECODING THE MEANING OF UART DATA FROM SRR DEMO

Hi,

Please see

https://e2e.ti.com/support/sensors-group/sensors/f/sensors-forum/934080/awr1642boost-ods-data-format-for-srr-demo

Thank you

Cesar

Hi Cesar,

Thanks for the reply, but i already know that the output format is mentioned in the function SRR_DSS_SendProcessOutputToMSS, so as an example can you please decode me the meaning of TLV with a frame length of 68.

Hi,

Please see in the gui src code how the TLV is parsed

\labs\lab0002_short_range_radar\gui\read_serial_port_and_plot_object_location.m

Every new frame packet starts with following

% Every packet from the AWR1642 has the following barker code at the beginning.
barker_code = char([2 1 4 3 6 5 8 7]);

This is the code that parses the TLVs

MMWDEMO_UART_MSG_DETECTED_POINTS    = 1;
MMWDEMO_UART_MSG_CLUSTERS           = 2;
MMWDEMO_UART_MSG_TRACKED_OBJ        = 3;
MMWDEMO_UART_MSG_PARKING_ASSIST     = 4;
MMWDEMO_UART_MSG_STATS = 6;

----

   if(magicOk == 1)
        tStart = tic;
        bytevec_cp_flt = single(bytevec_cp);
        % Extract the header.
        [Header, byteVecIdx] = getHeader(bytevec_cp_flt, byteVecIdx);
        sfIdx = Header.subframeNumber+1;
        if (sfIdx > 2) || (Header.numDetectedObj > MAX_NUM_OBJECTS)
            continue;
        end
        detObj.numObj = 0;
        clusterObj.numObj = 0;
        trackedObj.numObj = 0;
        
        % Extract each of the TLVs (type length value) in the current message.
        for tlvIdx = 1:Header.numTLVs
            [tlv, byteVecIdx] = getTlv(bytevec_cp_flt, byteVecIdx);
            switch tlv.type
                case MMWDEMO_UART_MSG_DETECTED_POINTS
                    if tlv.length >= OBJ_STRUCT_SIZE_BYTES
                        [detObj, byteVecIdx] = getDetObj(bytevec_cp_flt, ...
                            byteVecIdx, ...
                            tlv.length);
                    end
                case MMWDEMO_UART_MSG_CLUSTERS
                    if tlv.length >= CLUSTER_STRUCT_SIZE_BYTES
                        [clusterObj, byteVecIdx] = getClusters(bytevec_cp_flt, ...
                            byteVecIdx, ...
                            tlv.length);
                    end
                case MMWDEMO_UART_MSG_TRACKED_OBJ
                    if tlv.length >= TRACKER_STRUCT_SIZE_BYTES
                        [trackedObj, byteVecIdx] = getTrackers(bytevec_cp_flt, byteVecIdx, tlv.length);
                    end
                    
                case MMWDEMO_UART_MSG_PARKING_ASSIST
                    [parkingAssistRangeBins, byteVecIdx] = getParkingAssistBins(bytevec_cp_flt, byteVecIdx, tlv.length);
                    
                case MMWDEMO_UART_MSG_STATS
                    [StatsInfo, byteVecIdx] = getStatsInfo(bytevec_cp_flt, byteVecIdx);
                    %fprintf('StatsInfo: %d, %d, %d %d \n', StatsInfo.interFrameProcessingTime, StatsInfo.transmitOutputTime, StatsInfo.interFrameProcessingMargin, StatsInfo.interChirpProcessingMargin);
                    displayUpdateCntr = displayUpdateCntr + 1;
                    interFrameCPULoad = [interFrameCPULoad(2:end); StatsInfo.interFrameCPULoad];
                    activeFrameCPULoad = [activeFrameCPULoad(2:end); StatsInfo.activeFrameCPULoad];
                    guiCPULoad = [guiCPULoad(2:end); 100*guiProcTime/Params(1).frameCfg.framePeriodicity];
                    if displayUpdateCntr == 40
                        UpdateDisplayTable(Params);
                        displayUpdateCntr = 0;
                    end
                otherwise
            end
        end
       

hi,

i already saw read_serial_port_and_plot_object_location.m. But i'm not running the SRR program using GUI. I made the configuration to hard code. Now it's running as soon as i power the system.

i found out madic word, header, tlv type length etc... but i'm not getting the explanation for the rest inside tlv. i also found a pattern inside first tlv. can you please explain the rest. 

First Sequence: "1 0 0 251 15 99 1 106"

• X Coordinate:
  • Integer part: 1
  • Fractional part: 0.251 (approximately, in Q15 format)
• Y Coordinate:
  • Integer part: 15
  • Fractional part: 0.99 (approximately, in Q1 format)
• Z Coordinate:
  • Integer part: 1
  • Fractional part: 0.106 (approximately, in Q15 format)       Can i interpret the meaning of TLV1 like this? 

Hi,

Sorry for the delay

Please let me know if this is still an issue

thank you
Cesar