FirstEDA Blog – Why VHDL Still Dominates FPGA Design in Europe; And Why Aligning Verification Makes Sense

Across Europe, VHDL continues to be the HDL of choice for FPGA development. This isn’t simply a matter of legacy codebases; it reflects the way engineering education, industry standards, and long‑term project requirements have evolved.

European universities still teach VHDL as the primary HDL, and sectors such as aerospace, defence, rail, and industrial automation rely on it for designs that must remain maintainable and certifiable for many years. As a result, teams across the Europe have built deep expertise, extensive libraries, and well‑established workflows around VHDL.

In this context, adopting a different language (typically SystemVerilog) for verification can introduce unnecessary complexity and cost. For many FPGA teams, keeping both design and verification in VHDL leads to a more coherent and efficient development process, without the overhead of maintaining two separate HDL skill sets.

What Makes VHDL a Strong Option for Both Design and Verification?

VHDL’s strong typing is often seen as strict, but in practice it helps engineers catch issues early and express intent clearly. In verification, where subtle mismatches can lead to long debugging sessions, this level of precision becomes a real advantage. The language’s explicit semantics also encourage engineers to be deliberate about timing, data structures, and behaviour; qualities that align well with FPGA‑centric development, where determinism and clarity are essential.

Modern VHDL has also evolved significantly. VHDL‑2008 introduced a wide range of improvements, and the more recent VHDL‑2019 standard continues that progression. It brings refinements that make the language more consistent, more expressive, and easier to use in both design and verification. Enhancements such as improved generic handling, better package usability, and clearer rules around shared variables and protected types help engineers write cleaner, more maintainable code. For verification in particular, these refinements support more modular testbench architectures and reduce the friction that once existed when building advanced verification components in pure VHDL.

Industry Support: Aldec’s Commitment to VHDL

Tool support is a critical part of any HDL ecosystem, and this is an area where VHDL continues to be well served. Aldec, in particular, has maintained a strong commitment to VHDL for decades. Their simulators offer industry‑leading support for the full VHDL‑2019 standard, giving engineers access to the latest language features without compromise. This level of support matters: it ensures that teams can adopt modern VHDL constructs confidently, build more capable testbenches, and take advantage of the improvements introduced in the most recent standards.

For organisations that rely heavily on VHDL, Aldec’s comprehensive implementation provides a stable and forward‑looking foundation for both design and verification.

OSVVM: A Natural Fit for VHDL‑Based Verification

For teams working in VHDL, OSVVM (Open Source VHDL Verification Methodology) has become the leading approach to advanced verification. It brings capabilities such as constrained random stimulus, functional coverage, scoreboarding, and transaction‑level modelling (features traditionally associated with SystemVerilog methodologies) while remaining entirely within VHDL.

What sets OSVVM apart is its practicality. It is lightweight, accessible, and designed with FPGA teams in mind. Engineers can adopt advanced verification techniques without needing to introduce a second HDL or learn a large, ASIC‑oriented framework. For many European teams, this balance of capability and simplicity makes OSVVM an ideal fit.

Strengthening Your Verification Skills with FirstEDA and Jim Lewis

As teams look to modernise their VHDL‑based verification flows, training becomes most valuable when it connects engineers directly with the people shaping the tools and methodologies they rely on. This is where FirstEDA’s partnership with Jim Lewis, the chief architect of OSVVM, carries real significance.

Jim has been a central figure in the evolution of modern VHDL verification. His work on OSVVM has helped bring advanced verification techniques (constrained random testing, functional coverage, transaction‑level modelling) into a form that is accessible and practical for FPGA‑focused teams. Learning from him offers more than just an introduction to a library; it provides insight into the reasoning behind OSVVM’s structure, the design patterns it encourages, and the direction the methodology is heading.

Developed and delivered by Jim, FirstEDA’s training builds on this foundation by focusing on how these ideas translate into day‑to‑day engineering practice. The emphasis is on clarity, maintainability, and testbench architectures that scale with real projects rather than academic examples. For teams who want to get the most out of VHDL‑2008, VHDL‑2019, and OSVVM (without shifting to a different HDL or adopting heavyweight ASIC‑oriented frameworks) this combination of practical guidance and direct access to the methodology’s creator offers a grounded, relevant way to advance their verification capability..

If you are contemplating your next FPGA design, looking for advanced FPGA development tools, or need VHDL or verification training, why not speak to us at FirstEDA Limited?