| Contributor: | Umer Yousafzai | |
| Date: | October 17, 2008 | |
| Description: | How to Use Callbacks with OVMCallbacks are useful to manipulate an object at pre-determine cut points in code from above, i.e., a test manipulating a transaction driver. They can also be used for notification. In OVM examples, callbacks are not used extensively because ovm_factory is a more powerful and general solution for defining new behavior in a class for procedural code, i.e., redefining virtual function, task, to declarations like adding variables, constraints, and functional coverage to existing objects. To illustrate the use of callbacks, I show a simple driver that gets a transaction and provides a callback hook by triggering an event before processing it. This callback hook can be used externally to manipulate the transaction procedurally For more information, see ovm_event in OVM Reference Manual
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| Download: | callback_0.sv |