cocotb is a coroutine based cosimulation library for writing VHDL and Verilog testbenches in Python.

cocotb is a framework empowering users to write VHDL and Verilog testbenches in Python. cocotb: Python-based chip (RTL) verification. Contribute to cocotb/cocotb development by creating an …

In this talk A step-by-step introduction to cocotb. What’s new in cocotb 2.0? How IBM is using cocotb to turbo-charge its chip development.

cocotb is a COroutine based COsimulation TestBench environment for verifying VHDL and SystemVerilog RTL using Python. cocotb is completely free, open source (under the BSD License) …

Learn cocotb, the Python-based hardware verification framework that makes testbench development faster and more intuitive.

What can you do with cocotb? Cocotb is a tool for writing testbenches to verify HDL. The learning curve is less steep than UVM or SystemVerilog - you can get up and verifying in minutes.

Nov 15, 2025 · cocotb is a coroutine based cosimulation library for writing VHDL and Verilog testbenches in Python.

In cocotb, you can access all internals of your design, e.g. signals, ports, parameters, etc. through an object that is passed to each test. In the following we’ll call this object dut.

cocotb has 5 repositories available. Follow their code on GitHub.

The COroutine based COsimulation TestBench (cocotb) is an extremely popular open-source and completely free environment for creating hardware testbenches in Python.