You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: readSpData.m
    path of file: ./repos/picampinos/matlab
    
    the code of the file until where you have to start completion: function readSpData(srcComObj, ~)
    RGB_img = zeros(480,640,3,'uint8');
    img = zeros(480,640,'uint32');
    lower5 = hex2dec('1f') .* ones(480,640,'uint32'); % 0x1f 0x1f ....
    lower6 = hex2dec('3f') .* ones(480,640,'uint32'); % 0x3f 0x3f ....
    lower8 = hex2dec('ff') .* ones(480,640,'uint32'); % 0xff 0xff ....
    lower16 = 65535 .* ones(480,640,'uint32'); % 0xffff 0xffff ....


    
function readSpData(srcComObj, ~)
    RGB_img = zeros(480,640,3,'uint8');
    img = zeros(480,640,'uint32');
    lower5 = hex2dec('1f') .* ones(480,640,'uint32'); % 0x1f 0x1f ....
    lower6 = hex2dec('3f') .* ones(480,640,'uint32'); % 0x3f 0x3f ....
    lower8 = hex2dec('ff') .* ones(480,640,'uint32'); % 0xff 0xff ....
    lower16 = 65535 .* ones(480,640,'uint32'); % 0xffff 0xffff ....


    global a img1;
    %% Read the ASCII data from the serialport object.
    data = read(srcComObj,640*2/4,'uint32'); %

    img1(a,:) = data;
    
    disp(a);
    if a == 480
        %% decode image
        for HGT = 1:480 
            for WID = 1:1:320
                try
                    data = (img1(HGT,WID)); % convert end