MATLAB: Timer never stop!

timer

 function timecount(~)
sec=input('얼마나 세야 하는거냐?');
t = timer('TimerFcn', 'stat=false; disp(''땡!'')','StartDelay',sec); 
    start(t) 
        stat=true; 
        b=sec;
        a=0;
        min=0;
        hour=0;
        while(stat==true) 
            b=b-1;
            a=a+1;
                if a>=60
                a=a-60;
                min=min+1;
                end
                if min>=60
                    min=min-60;
                    hour=hour+1;
                end
            if min==0
            fprintf('%s초 \n', num2str(a));
            elseif hour==0
            fprintf('%s분 \n', num2str(min));
            fprintf('%s초 \n', num2str(a));
            else
            fprintf('%s시간 \n', num2str(hour));
            fprintf('%s분 \n', num2str(min));
            fprintf('%s초 \n', num2str(a));
            end
         pause(1) 
         if sec == 0;
             stop(t)
             delete(t)
         end
        end
end
this is whole code of timer.. Input is second that you want to count(ex : 10sec).. when you input 10sec, this function will end after 10sec. but it's not stop and run infinity…

Best Answer

When you define the timer's callback as a string, it is evaluatred in the base workspace. Therefore you cannot observe changes in the variable |stat|inside the show function. Better use a flag which is "attached" to the timer, e.g. its UserData:
t = timer('TimerFcn', @myTimerCB, 'StartDelay', sec, 'UserData', 0);
start(t)
...
while get(t, 'UserData') == 0
  ...
end
...
function mytimerCB(TimerH, EventData)
set(TimerH, 'UserData', 1);
end
Related Question