Michael Huang asked 4 years ago
Hi,
I am trying to make the target moving straight. I noticed that in the moving target sample. The way to make it moving is to change VCODE(3) and VCCODE(4). In my case it will be VCODE(4)=VCODE(4)-speed*counter. The problem is the counter cannot reset when it turns to second target. I have tried to use mod, but this will not solve the problem eventually
Thanks,
Michael
Duncan McLean Staff answered 4 years ago
Hi Michael,
The moving target sample was really just intended as an example – the use of the counter in this case was a convenience.
You could make your own counter with a bit of embedded MATLAB. Something like this should work:
function counter=Counter(reset)
persistent value
if isempty(value) || reset == 1
value = -1;
end
value = value + 1;
counter = value;
end
In your Stateflow you would need to send the “reset” input on this code to 1 briefly at the start of each trial.
This counter would run at the default speed of the model. i.e. 2 or 4 kHz. If you want the counter to run at 1 kHz then you would need to right click on the MATLAB block, get properties, and explicitly set the update rate to 0.001 (i.e. 1 ms).
There are many other ways to solve this problem, it just depends on the specifics of what you want to do.
Cheers!
Duncan
Michael Huang
replied 4 years ago Hi Duncan,
When I right click the MATLAB function block, properties, there are general, block annotation and callbacks. There is no option to set the update rate
Duncan McLean Staff answered 4 years ago
Hi Michael,
Sorry, rather than “properties” you should open “block parameters”.