Difference b/w virtual and non virtual bus?
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hey, can anyone explain me the difference b/w virtual and non virtual bus? if possible, give a real life example for better understanding.
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Answers (2)
Guy Rouleau
on 26 Apr 2012
A virtual bus is just a visual representation in the Simulink editor. It makes your model look nicer and easier to manage when you have many signals. It does not affect how the signal is stored in memory.
With a nonvirtual bus, the data is stored as a structure in a contiguous piece of memory. Because of that, nonvirtual have more constraints.
Consider nonvirtual bus only if you have code generation constraints requiring it.
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Kaustubha Govind
on 26 Apr 2012
Edited: Rena Berman
on 1 Apr 2022
A bus signal is simple a structure signal containing numeric elements. When a bus signal has a Simulink.Bus object associated with it, it becomes a non-virtual bus. See the blog post Nonvirtual Bus Signals for a more detailed explanation. The documentation on Types of Composite Signals also is a good reference.
AFAIK, there is no "real world" example - the difference is only in how Simulink treats the signals.
2 Comments
Guy Rouleau
on 26 Apr 2012
A little precision... virtual buses can have a an associated bus object. This is not required, but can be be used for validation or initialization.
Non-virtual buses need a bus object.
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