MATLAB: How to obtain the source and destination block names and port numbers connected by a signal in Simulink

Question

If I click on a certain signal in a Simulink model, how can I programmatically obtain the names of the source and destination blocks connected by the signal? Also, how can the port numbers (source and destination) be printed from the Command Window?

Answer 1

The handle to a selected signal can be obtained using the 'find_system' command:

>> h_line = find_system(gcs,'FindAll','on','FollowLinks','on','type','line','Selected', 'on');

The names of the source and destination blocks with respect to the selected signal can be obtained using the 'get_param' command with the 'SrcBlockHandle' and 'DstBlockHandle' parameters:

>> source_block_handle = get_param(h_line, 'SrcBlockHandle');
>> source_block_name = get_param(source_block_handle, 'Name');

Similarly, the 'SrcPortHandle' and 'DstPortHandle' parameters can be used to obtain the port numbers associated with the selected signal:

>> source_port_handle = get_param(h_line, 'SrcPortHandle');
>> source_port_number = get_param(source_port_handle, 'PortNumber');