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The Virtuoso® Schematic Editor Probes Assistant has existed for a while now. It’s a dockable assistant that lets you visually inspect the probed nets across a schematic design hierarchy. Now, with the implementation of the SKILL function schTraceNet, you can ask much more complex questions than What’s this net connected to?. The SKILL function offers programmatic flexibility, allowing you to define your own callback as an argument and have it called at each hierarchical level where the traced net is present. This gives you the flexibility to write your own SKILL, based on schTraceNet, to find out answers to complex questions such as:
schTraceNet traces a schematic net through the design hierarchy and calls a user-defined callback at each hierarchical level where the net is present. The callback is able to trace all instances, including the ignored instances that are not displayed in the Navigator assistant.
Note: Using SKILL++ it also becomes possible to encapsulate the callback, global variable, and the call to schTraceNet in a namespace so that it can be referred to as standalone.
The video Probing and Calculating the Area of a Net demonstrates how probes can find all instances that connect to a net and uses the SKILL schTraceNet to calculate the connected area of a net.
To learn more about this feature, watch the video Probing and Calculating the Area of a Net. You can also find this video in the Video Library section on the Cadence Support portal.
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Zsolt Haag and Sarah Finlayson