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IWR1443BOOST: MATLAB

Part Number: IWR1443BOOST

Hi,

I  am using the iwr1443boost and i have been runnig the lab2: VitalSIgndemo. The SDK ist ver. 1_2. I Have 2 questions:

1)  what does this code lines mean, what do they do?

bytevec_cp(bytevec_cp_len+1:bytevec_cp_len+length(bytevec)) = bytevec;
     bytevec_cp_len = bytevec_cp_len + length(bytevec);
     bytevec=[];
     bytevecStr = char(bytevec_cp);
     magicOk = 0;
     startIdx = strfind(bytevecStr', char([2 1 4 3 6 5 8 7]));
       if ~isempty(startIdx)
            bytevec_cp(1: length(bytevec_cp)-(startIdx(1)-1)) = bytevec_cp(startIdx(1):end);
            bytevec_cp_len = bytevec_cp_len - (startIdx(1)-1);
            
            if bytevec_cp_len >= TOTAL_PAYLOAD_SIZE_BYTES
                magicOk = 1;
            else
                magicOk = 0;                
            end
        end

2) I would like to send some other data from UART. How can i get them to be written on the APP, where i already have created a textlabel field. If you could suggest me a code, that would be great.