1
Download VCS user guide
Transcript
- functional coverage - stimulus generation - response checking This chapter focuses on the stimulus generation requirement. This chapter is of interest to those responsible for creating reusable test scenarios and testcases through directed or random stimulus. Directed stimulus can be considered as a subset of random stimulus and with a properly designed random generator, which can be created simply. Random generators are aimed at exercising the DUT according to the requirements outlined in the verification planning process (VMM Book, Chapter 2). Random generators should be controllable to cover the entire spectrum of randomness between pure random and directed stimulus. Generating Stimulus In a typical simulation, thousands of data items or transaction descriptors are created, which flow through transactors, record and compare in the self-checking structure. Also, only a handful of data and transaction sources that need to exist at the beginning of the simulation and remain in existence until the end are there. You should model the generation of data (packets, frames, instructions) or transaction descriptors separately from the data models themselves because of the different dynamics of their respective lifetimes. VMM User Guide 6-2
