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uvm-basics

The goal of this repository is to share the designs I am using to learn UVM. The examples are gradually increasing in complexity, providing a gradual learning process. All examples were tested with Questa 10.3c and 10.6e. The examples have a 'run.do' file which compiles and executes the tests.

Training Requirements

Before starting training for UVM, it is highly recommended to check these requirements:

  • Access to Questa. Those without access to Questa can try to use EDA PlayGround;
  • Object-oriented programming concepts and basic design patterns;
  • Basic experience with SystemVerilog;
  • Basic experience with Verilog/VHDL;
  • Basic experience with git.

The Branch Structure

The Master branch is supposed to be the stable one while Devel is under development. Branches such as, for instance, devel_router would have under development code for the router TB. Similarly, a branch called devel_router_feature is for the development of some specific feature for the router TB. The current branches can be seen here.

Minimal UVM

This is a minimal working UVM example, adapted from https://www.edaplayground.com/s/example/546 to work with Questa. The DUT is an adder. The testbench has just an environment with a single test, 2+3=5.

Basic design

The DUT is a simple counter. The TB is inspired by the videos Basics of UVM. I just watched the videos and tried to code the mentioned examples, including some free adaptations on my own.
Compared to the previous example, the Minimal UVM, this one resembles a recommended TB architecture, with agents, monitors, drivers, coverage, scoreboard, sequence, sequence items, randomization, and functional coverage.

Multipliers

It is a parametrizable UVM testbench tested on 4 different multipliers. The idea here was to devise a single TB that would work with different mult designs, to show a certain level of TB reuse. The reused part of the TB is located at tb/common and the TB specific part is located at the DUT's respective dir names found under TB dir. This TB includes a basic use of config_db to pass interfaces to the driver/monitor.

Network-on-Chip

The design is the NoC design presented in the paper HERMES: an infrastructure for low area overhead packet-switching networks on chip. This testbench is divided into two parts: TB for a single router (under construction) and TB for a NoC with NxM routers (to be done). Check the router TB document. The NoC TB will be under developed soon.

UART interface

An UVM testbench for an UART interface. To be done !