Port usage (ARINC for VxWorks code)
A Port Usage is not an ARINC item, but on the Configuration Diagram's tab there is a Port Usage button that creates a UML Association between an Application Part and a Port on a Configuration Diagram. When generated, a Port Usage results in an APEX queuing port or APEX sampling port being generated.
A Port Usage link between an Application Part and a Port results in that Port being generated in the Configuration XML and the application startup code that is generated for the Application Part. For information about how Queuing Ports and Sampling Ports are generated, see the related links below.
To define port usage on a
Configuration Diagram: click the 
Port Usage button, and the click the following items:
Port Usage button, and the click the following items:• An
Application Part, and then a
Source Queuing Port or
Source Sampling Port on the Application Part's parent
Partition Part.
• A
Destination Queuing Port or
Destination Sampling Port on a
Partition Part, and then an
Application Part within that Partition Part.
When shown on a Configuration Diagram a Port Usage's (Association's) notation is as follows:
A Port Usage is a UML Association.
The following sections provide information about how a Port Usage is used in the model.
Shown on these diagrams
ARINC properties
None.