How to find a source block that goes through a goto/from block?

I am trying to write a script that will list out all elements on a bus that are consumed within a model. To do this, I used find_system to find all the bus selector blocks. I was able to get all the elements being selected. I am assuming buses are inputs to the model and aren't created and read from within the same model. To trace from the bus selector back to the input port, I was using:

portC= get_param(busSelectors(i),'PortConnectivity');

busSelSrc = portC{1}.SrcBlock;

However, 'From' blocks only appear to have DestBlock field filled in and source is empty. I'm not sure how to trace 'From' -> 'Goto' block from a script.

Here is an example output where CL_e2a_sl is model name. aiAD is bus name and signal impact_press_sel from that bus is getting read in that model.

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Processing: CL_e2a_sl

aiAD.impact_press_sel

aiPF.body_lat_accel_compl_filt_e4

aiSM.along_track_accel_sel

aiSM.cross_track_accel_sel

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I am using Matlab2017a right now if that helps.

Answer 1

[Cory Mohling]

I have a work around that I can get by with. I temporarily turn on signalPropagation and get the name from that.

lh = get_param(busSelectors(i),'LineHandles');

prevLH_state = get(lh{1}.Inport, 'signalPropagation');

set(lh{1}.Inport, 'signalPropagation', 'on');

name = get_param(busSelectors(i), 'InputSignalNames');

name = string(name);

name = erase(name, '<');

name = erase(name, '>');

set(lh{1}.Inport, 'signalPropagation', prevLH_state);