MATLAB Programming Fundamentals - MathWorks

% object is running.

properties (Nontunable)

% The initial value of the counter

InitialValue = 0

end

properties (Nontunable, PositiveInteger)

% The maximum value of the counter

MaxValue = 3

end

properties (Logical)

% Whether to increment the counter

Increment = true

end

properties (DiscreteState)

% Count state variable

Count

end

methods (Access = protected)

% Increment the counter and return its value

% as an output

function c = stepImpl(obj)

if obj.Increment && (obj.Count < obj.MaxValue)

obj.Count = obj.Count + 1;

else

disp(['Max count, ' num2str(obj.MaxValue) ' ,reached'])

end

c = obj.Count;

end

% Setup the Count state variable

function setupImpl(obj)

obj.Count = 0;

end

% Reset the counter to one.

function resetImpl(obj)

obj.Count = obj.InitialValue;

end

34 System object Usage and Authoring