value that increase along with changing value by manual switch block simulink using embedded matlab function

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Luhur
Luhur 2011-7-15
hi all
i just wanna ask,how we do the increasing value by changing manual switch in simulink??
for example: i have manual switch, with 2 constant block connect to it, first signal= 1 , second=0. i have calculation that everytime we change value in manual switch the system will add 10 to the current signal.
how we do it with embedded matlab function??

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采纳的回答

Fangjun Jiang
Fangjun Jiang 2011-7-15
Do you have to use EML? If not, it could be done easily in Simulink using a trigger subsystem. Type "sldemo_counters" to open the demo model, connect your manual switch block output to the triggered subsystem. Inside the system, change the trigger from "risgin" to "either", change the constant from 1 to 10 then you got it.

更多回答（4 个）

Walter Roberson
Walter Roberson 2011-7-15
Please do not open duplicate questions; it just ends up duplicating efforts.
You can edit your previous question if needed.
Kaustubha Govind
Kaustubha Govind 2011-7-15
FWIW, here's an EML implementation:
function y = mycounter(u)
%#eml
persistent count;
persistent prevInput;
firstInput = false;
if isempty(count)
count = 0;
end
if isempty(prevInput)
prevInput = 0;
firstInput = true;
end
if ~firstInput
if (prevInput ~= u)
count=count+1;
end
end
prevInput = u;
y = count;
end
Fangjun Jiang
Fangjun Jiang 2011-7-15
Okay, feed the switch output signal to the triggered subsystem, still choose "either". Also, feed the switch output signal to an Inport of the the triggered subsystem, multiple it by 10, then feed it to an Integrator block. Did not verify. Should work. Try it yourself.
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Luhur
Luhur 2011-7-15
what if i have 3 signal fang??? -1,0,1 ,, if -1 then the current value was be diminished, 0 the value stay still and 1 the value increase.
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Fangjun Jiang
Fangjun Jiang 2011-7-15
If 1 then current value is increased by 10. Increased only once, or every time step as long as the switch output is 1?
Luhur
Luhur 2011-7-15
no only once, the case was the same with the manual switch, but in this case there was 0 and -1 for minus it.
so when curent value is 10, then the signal give 1, then 10 + 10 = 20,, and then the signal gives 0, then 20 + 0 = 20,, and if the signal gives -1, then 20 - 10 = 10,,
so now, the current value is 10.
how is it fang???

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