Contents
What is meant by synthesizable Verilog?
Synthesizable Verilog is that subset of the language that are accepted by the synthesis tools. The non-synthesizable constructs are used only for simulation and the synthesis tool cannot handle them.
Can a test bench be synthesized?
The test bench is typically not synthesizable since it must often contain timing information (delays) that cannot be synthesized into hardware (while the MUT contains no timing information other than delta delays).
What is meant by test bench?
A test bench or testing workbench is an environment used to verify the correctness or soundness of a design or model. In the context of software or firmware or hardware engineering, a test bench is an environment in which the product under development is tested with the aid of software and hardware tools.
What’s the best way to write a testbench?
A good testbench can cover a wide range of inputs reducing the chances of the design failing in the real implementation. Different languages and techniques such as verilog, system verilog, direct programming interface-c (DPI_C) are used for writing testbenches. For simplicity, the step by step guide uses verilog for the testbench development.
How is a testbench used in a simulation?
Testbenches are modules written to test a design or a part of a design by giving it different inputs and observing the output using a simulator. The testbench intends to facilitate the simulation tools by giving the required input in required order and taking the output of the simulation and checking it with the expected output.
Can a testbench be a non synthesizable module?
The testbench can be non-synthesizable and need not have any synergy with a hardware design. Create the testbench file as a non-synthesizable top module and instantiate the UUT in it. Declare the registers and wires required for feeding the UUT with inputs and taking its outputs.
Do you need a synthesizable testbench for FPGA design?
A general approach is to use more abstracted tests as you progress up the stack in terms of design complexity. Yes, you need to trust the tools (and the checking tools like logical equivalence proofs), but for a whole-fpga design (a) there won’t be space for a testbench, and (b) exhaustive coverage will take a long time.