It seems like you want to run a loop to check for client commands, executing the loop asynchronously while being able to interrupt it based on client commands.
To address this issue, consider using MATLAB's `timer` objects.
A `timer` object can be set up to execute its callback function at specified intervals, allowing your server to periodically check for new client commands without blocking the main thread that listens for incoming data.
- Define a `timer` object for running the device function loop. This allows the main server thread to remain responsive to incoming client commands.
- Use the `timer` callback to execute the device function. Within this callback, check the global `continueLoop` variable to determine if the loop should continue or be stopped.
- Adjust the `timer` execution based on client commands. When a start command (1) is received, start or resume the timer. When a stop command (2) is received, stop the timer, effectively breaking the loop.
Here's a simplified example to illustrate this approach:
% Define global variable
global continueLoop;
% Define the timer object globally or in an appropriate scope
global deviceTimer;
deviceTimer = timer('ExecutionMode', 'fixedSpacing', ...
'Period', 0.250, ... % Adjust the period to match your device function's requirements
'TimerFcn', @deviceFunctionLoop);
function readClientData
global continueLoop;
global deviceTimer;
% Read Client Data (integer)
switch
case 0
% Don't do anything
case 1
continueLoop = true;
if strcmp(deviceTimer.Running, 'off')
start(deviceTimer);
end
case 2
continueLoop = false;
stop(deviceTimer); % This will allow the loop to be interrupted
case 3
% Eval change parameters of function in base workspace
end
end
function deviceFunctionLoop(~, ~)
global continueLoop;
if ~continueLoop
% Optionally, stop the timer here if you want to ensure it doesn't fire again
stop(deviceTimer);
return;
end
% Eval start device function in base workspace
end
Refer to the following MathWorks Documentation for more details:
Thanks,
Chetan
