Function block works in 2017b but not in 2019b

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Lucas S
Lucas S 2022-3-2
评论： Lucas S 2022-3-21
Hello,
I have created a Simulink model that allow the user to simulate some Constant (True = not OK / False = OK), and spread the information to upper block.
To do that i have a function block (Function Matlab) that change the color of the upper block (Function A block) according to the information he receive :
function y = fcn(u)
coder.extrinsic('set_param','get_param','gcs');
parent = get_param(gcs,'parent');
y = u;
if u == 3
set_param(parent,'BackgroundColor','red');
elseif u == 2
set_param(parent,'BackgroundColor','orange');
elseif u == 1
set_param(parent,'BackgroundColor','gray');
else
set_param(parent,'BackgroundColor','green');
end
So if he receive 3 the Block "Function A" goes red, 2 => Orange, 1=> Gray and if all is good => Green.
In my 2017b Matlab all is working well, but when i test my model in 2019b Matlab the uppers Block colors don't change as if the Function Block don't work in 2019b.
Do you know what changed between versions ?
Thanks for helping in advance.
PS : I attached the example model : Simulate.slx

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采纳的回答

Fangjun Jiang
Fangjun Jiang 2022-3-21
Put a breakpoint in the code above and debug, the problem is clear.
The "parent" of your "gcs" is the root level model, which can't be assigned a background color.
Avoid using "gcs". Specify full path.
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Fangjun Jiang
Fangjun Jiang 2022-3-21
Indeed it is caused by the difference between R2017b and R2019b.
Paused after the "parent" line, gcb and gcs returned different value between R2017b and R2019b. In R2017b, there seems to have a S-function involved.
Lucas S
Lucas S 2022-3-21
Ok thanks you for your response ! I will try to solve this when i will have my 2019b version.

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