timer period resolution issue
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Hi all,
I am using MATLAB 2022b version.
I am developing a script which sends the packet at every 10 msec.
I configured the timer in free running mode with the period of 10 msec and then started storing the time stamp value in an array at each interrupt in my timer ISR.
Then plotted the difference between the time stamp values ,we are observing that the timer interrupt is varying from 7msec to 15msec.
But when the same calculations are carried out for 1sec period, we have observed that max error was 2msec .
Can you please provide me a wayout to configure the timer at 10 msec period.
回答（2 个）
Dr. JANAK TRIVEDI
2023-2-7
0 个投票
% Start timer
t = timer('TimerFcn',@timerISR, 'Period', 10/1000, 'ExecutionMode', 'fixedRate');
start(t);
% Timer ISR function
function timerISR(~,~)
tic; % Start measuring processing time
% Code to store time stamp value in an array
processingTime = toc; % End measuring processing time
set(t,'Period',(10 - processingTime)/1000); % Adjust timer period
end
Hi Rakesh,
ExecutionMode can be set to 'fixedRate', so that the timer generates events at a fixed rate.
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