MATLAB: Event-based Programming

programming

Hi, I need to write a program in such a way that it performs certain operations when an event happens. In particular, the event concerns the reading of a precise number of bytes from a serial port. I have to write the program using the concept of event-based programming; so if my event does not happen (so there is no precise number of bytes to read on the serial port) my program performs other operations. Is there any example I can start from to do this? I state that I am not familiar with this type of approach.

Thanks in advance

Best Answer

You can use callbacks in MATLAB to use event based execution.

As you are working with the Serial Port, I would suggest you to start with Using Callbacks for Serial Port Communication.

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MATLAB: Accumulator for Event-based model…

I assume the feedback accumulator you describe is an Add block whose output is fed back via a Memory block to itself. Try placing this accumulator inside an Atomic Subsystem and set the Memory sample time to be -1 (inherited). When this Atomic Subsystem is connected to the Get Attribute block it will run only when a new entity arrives at the Get Attribute. The documentation example (ex_signal_cycle_delay) shows how such a configuration can be used.

simeventsdocex('ex_signal_cycle_delay')

MATLAB: Event-based ODE inside a handle class

You need a static method. ode event functions are not expecting the object to be passed. They are, however, expecting t to be passed as the first parameter.

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MATLAB: Accumulator for Event-based model…

MATLAB: Event-based ODE inside a handle class

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