Matlab function into simulink: variable declaration
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Hi, I'm programming an arduino due using a matlab function into simulink. As a test, i try to let the on board let blink and count how many times the led has blinked using the matlab function with the folowing code:
function [LED,counter]= blink(pulse)
%#codegen
counter=0;
LED=0;
while true
if pulse == 1
LED=1;
counter=counter+1;
else
LED=0;
end
end
In this code, pulse is a pulse generator, LED goes to the pin of the on board led. With this code, the led doesn't blink because i guess the function doesn't end because of the while loop so i tried another function
function [LED,counter]= blink(pulse)
%#codegen
counter=0;
if pulse == 1
LED=1;
counter=counter+1;
else
LED=0;
end
with this code, the led will blink, but the counter resets after every loop, but without 'counter=0' there is an error because counter isn't initialized. I tried with the model properties, StartFcn to initialize the counter but that doesn't work, anyone who can help me? Thanks!
回答（1 个）
Walter Roberson
2016-1-15
0 个投票
Use "persistent" ? Though in that particular context I am not sure what the value would initialize to.
2 个评论
Thogoe
2016-1-15
Walter Roberson
2016-1-15
Do not persistent the output variable, persistent the counter variable and copy the counter variable to the output variable.
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2016-1-15
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