Name of Bus at input or output port of a block

Hello! I am trying to determine the name of some busses at the input and output ports of a block. How could I do this programatically?

For example, I would like to enter a series of commands into the Command Window that would return the names "Inbus" and "Inbus2" for the inputs into 'SubsystemName' and "Outbus" for the output, returned as strings. The signals themselves are not named (and will not be named). I was hoping it was something that could be done with get_param(gcb,????), but there doesn't seem to be a function that returns the Bus names.

Thanks in advance!

Answer 1

[Fangjun Jiang]

"Inbus" and "Inbus2" here are the tag names of the "From" block. They have nothing to do with the bus name, of curse except that you make it the same as the bus name. To get it

get(gcbh,'GotoTag')

To get the bus name, the bus needs to be named somewhere (preferably at its source), then at the line connecting the "From" block and the "SubsystenName" block, turn on signal name progpagation. Update the model, pass without any error.

Then follow this example

model='slexBusExample';
open_system(model)
block='slexBusExample/Subsystem5/Subsystem2';
lh=get_param(block,'LineHandles');
in1=lh.Inport(1);
set(in1,'SignalPropagation','on');% no need here in this example since this is the source of the bus name
BusName=get(in1,'Name')

BusName = 'sinusoidal'

% in case the bus name is not named here
sph=get(in1,'SrcPortHandle');
>> BusName=get(sph,'PropagatedSignals')

BusName =

    'sinusoidal'

[Cory Dinkle]

Thank you for the response. The "From" tags were used simply so I could illustrate, this is not the actual system. I have revised the graphic so that this example is clear.

Also, your response includes the requirement that the signals are named. As stated in my original post, these signals are not (and will not) be named, therefore 'SignalPropagation" will not be set to 'on'.

Is there not a way to programatically determine the Bus name of an input that is a Bus signal, at the inport/outport of a Subsystem?

[Fangjun Jiang]

Is the "Inbus" block (shown as a black dot) a "Bus Element In" block?

[Cory Dinkle]

No, in the actual system they are tags. Is it possible to get the assigned names of an inport or output, regardless of whether it is a bus or not? Maybe this is an easier task to achieve.

In my updated graphic, the names I am trying to get programatically are the inport and outport names ("Inbus", "Inbus2", and "Outbus"). Is it possible to get these names from the Command Window?

[Cory Dinkle]

I have updated the graphic to be as close as possible to what the actual system is. I am hoping to get the names of the SubsystemName block inports and outports ("Inbus", "inbus2", "Outbus").

[Fangjun Jiang]

In my code example, you can get this

SrcBlockHandle=get(in1,'SrcBlockHandle')

In your case, you will get the block handle of the "Inbus" or "Inbus2" block, then you will have all their properties.

For bus signal name, you have to specify it some where. Otherwise, no way to know what the name, right? The Inport or Outport block names are still not the bus name.

[Cory Dinkle]

"For bus signal name, you have to specify it some where. Otherwise, no way to know what the name, right? The Inport or Outport block names are still not the bus name."

Yes, this is true and I apologize. I suppose I could've stated this all along, that though I want the Bus names, I am just trying to get the Inport and Outport block names (since they are the same name).

[Fangjun Jiang]

Then it is not that hard. Start from the subsystem block, find its input and output line handles. Follow the line, find the source block handle or destination block handle and you will get it.

[Cory Dinkle]

Thanks!