Code covered by the BSD License  

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CO2gui - lab control and automation

CO2gui - lab control and automation

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06 Jan 2010 (Updated )

Software used for controlling and data logging lab equipment.

fibreobj(com, userData)
function serialObject = fibreobj(com, userData)
% FIBREOBJ Returns the serial object for the Fibre Optic Reflectometer
% serialObject = fibreobj(com, userData) returns the serial object for the
% Fibre Optic Reflectometer (FOR) given a suitable COM port number
% (unsigned integer: 1-255). If an object already exists on that COM port
% (open or otherwise), it returns an error.  Information can be passed into
% the serial object through the optional userData argument.

% e.g. serialObject = fibreobj(9) - returns a serial object for the FOR on
% COM9


% checks the number of arguments
error(nargchk(1, 2, nargin))

% Error handling
if ~iscomport(com)
    % errors
    error('com must be an unsigned integer from 1 to 255')
end

% if object on specified COM port exists, errors, otherwise creates
% serial object

% initialises variables
serialPort = sprintf('COM%d', com);

% if serial object does not exist, defines serial object and opens it
if isempty(instrfindall('Port', serialPort))
    % creates the serial object
    serialObject = serial(  serialPort,...
        'BaudRate', 19200,...
        'DataBits', 8,...
        'InputBufferSize', 100 * 1024,...
        'Parity', 'none',...
        'StopBits', 1,...
        'Terminator', '',...
        'TimeOut', 1,...
        'UserData', struct('activeChannels', [true, false]));

    % if userData was provided, modify the object
    if nargin >= 2
        % changes it
        serialObject.UserData = userData;
    end
    
else
    % errors
    error('Object(s) already exist on this serial port')
end

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