What is UCDB file?
Trend UCDB is nothing but a special purpose UCDB file which contains the coverage data over the period for trend analysis. Trend report offers 2-dimensional representation of coverage number over the period for individual feature or instance of DUT.
What is code coverage in modelsim?
Modelsim or Questa Code Coverage gives you graphical and report file feedback on which executable statements, branches, conditions, and expressions in your source code have been executed. It also measures bits of logics that have been toggled during execution.
What is code coverage verification?
Code coverage is a way to assess the progress of functional verification. It helps verification engineers understand how well a design has been verified and which areas need more work.
What is toggle coverage?
Toggle coverage reports describe design activity in terms of changes in signal values. Toggle coverage reports can identify a variety of issues in the design and the testbench, for example: Identify signals which were not initialized.
What is coverage in SV?
Functional coverage is a measure of what functionalities/features of the design have been exercised by the tests. This can be useful in constrained random verification (CRV) to know what features have been covered by a set of tests in a regression.
How do I enable VCS coverage?
Any combination of coverage can be enabled simultaneously using the + sign e.g. -cm cond+line enables conditional and line coverage.
How do you write toggle coverage?
Toggle coverage could be as simple as the ratio of nodes toggled to the total number of nodes. Above example shows the signal changes from one level to another. All types of transitions mentioned above are not interested. Only 1->0 and 0->1 are important.
What is toggle coverage in SV?
Toggle coverage reports describe design activity in terms of changes in signal values. Toggle coverage reports can identify a variety of issues in the design and the testbench, for example: Identify signals which were not initialized. Locate areas of the design which are not properly tested by the testbench.
How do you write SV coverage?
How to write covergroups?
- Variables are mentioned as a coverpoint .
- Coverpoints are put together in a covergroup block.
- Multiple covergroups can be created to sample the same variables with different set of bins.
- bins are said to be “hit/covered” when the variable reaches the corresponding values.
What are the types of coverages available in SV?
There are two types of coverage metrics,
- Code Coverage.
- Functional Coverage.
How to generate code coverage report with questasim?
Generate Code Coverage Report with QuestaSim To generate code coverage reports in questasim, there are few lines of code you need to add in tcl script .do files.
How to get a HTML or text report in questa?
2.In order to get a html or text report, reload the formed ucdb file and use coverage report to form the report as follows: One can also use Questa GUI to form the report.
How does covercheck work in questa?
Questa CoverCheck automatically traverses your DUT’s state spaces and identifies unreachable areas, enables the user to “waive”/exclude items from future analyses, and pipe all results into a Unified Coverage DataBase (UCDB) for inclusion in Questa Verification Management analyses and progress reporting. releasing them to your team.
How to get a HTML or text report from a simulation?
Save the coverage report of the simulation in a UCDB file (Refer Questa User Manual for details about UCDB file). 2.In order to get a html or text report, reload the formed ucdb file and use coverage report to form the report as follows: