Send and Receive via serial port execution time

Hi, I have a questions. I have created a code for send and receive binary bits via serial port. However, this need very long execution time. Anyone knows how to improve on this?

%Send
send_count=1;
    loop_count=0;
    while send_count < looptimes+2;
        if strcmp(s.PinStatus.ClearToSend, 'on') && send_count <looptimes+1
            C=[];
            for i=1+5000*(send_count-1):5000*send_count 
            C=[C F((-15+16*(i)):16*(i))]; %Arrange in 16bits and send over

              end
              fprintf(s,C)
              send_count=1+send_count;
          end
  end
  s.RequestToSend='off';
  guidata(hObject,handles);

% --- Executes on button press in Receive.
function Receive_Callback(hObject, eventdata, handles)
% hObject    handle to Receive (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
Save_file=get(handles.EditSaveAs,'String');
if isempty (Save_file)
    msgbox('No File Selected!','Error','error');
else
    s.RequestToSend='off';
    s.RequestToSend='on';

      received_count=1;
      loop_count=0;
      file=[];
      while strcmp(s.PinStatus.ClearToSend,'on')
          s.RequestToSend='on';
          received=fgetl(s);
          file=[file received];   

          received_count=received_count+1;
          set(handles.EditStatusBar, 'String', 'Receiving....');
          pause (0.2);
          loop_count=0;
  s.RequestToSend='off';

          size_byte=fix(size(file)/32);
          M=size_byte(2);
          Video_bin=[];
           for j=1:M
               b=16*(j);
               a=-15+b;
               Video_bin= [Video_bin;file(a:b)];
           end
                Video_dec=bin2dec(Video_bin);
                fid1=fopen (Save_file, 'wb');
                count=fwrite(fid1, Video_dec, 'uint16');

Can thin

[Oleg Komarov]

Remove the duplicate post.

Answer 1

[Walter Roberson]

Testing RTS and CTS can take a long time. It is of no practical use to manipulate or test those lines yourself unless you are using a half-duplex transmission scheme. You should instead switch to hardware flow control.