Avoiding Common Pitfalls in FPGA Project Development

Throughout my career, I have designed numerous FPGA solutions for a broad spectrum of applications. Unfortunately, I have also had to rescue several projects that had gone off course. While each case involved distinct applications and teams, a recurring pattern emerged: these designs shared common traits that doomed them before the first line of HDL was written.

With this experience in mind, I outline five frequent issues I have observed when rescuing FPGA projects. These issues are:

#1: A stable requirements baseline is essential. Engineers often begin work while requirements are still evolving, hoping to demonstrate progress. Beginning development without a fully agreed baseline leads to rework, delays, and cost overruns. In safety‑critical contexts such as SIL4 systems, detailed requirements are mandatory, whereas commercial systems may allow less granularity. Regardless, scope creep becomes inevitable if the baseline is not established early, and subsequent modifications can break the architecture.

#2: Every team member must understand the development plan. A clear plan—defining the path from kick‑off to delivery—identifies major milestones and engineering review gates. Coupled with an architecture and design description, this documentation ensures that all functions trace back to the requirements and that the proposed approach satisfies every high‑level need.

#3: Verification is often the most time‑consuming phase, yet it is critical. Beyond logical simulation, verification must cover all operating conditions of the device. A structured verification strategy—encompassing functional, performance, and environmental tests—is required. Simply writing code, running a few simulations, and deploying the design to hardware is insufficient.

#4: Design reviews are indispensable for catching oversights. By conducting independent reviews at defined stages, teams confirm adherence to best engineering practices and internal standards. Reviews provide an objective assessment of architecture and implementation, helping to prevent downstream integration issues and ensuring quality.

#5: While process matters, efficient code development and IP reuse are equally vital. Reusing existing IP blocks from the library reduces risk and accelerates delivery. When new modules are necessary, designing them for future reuse should be a priority. High‑Level Synthesis (HLS) tools enable higher‑level abstraction, facilitating rapid exploration of solution spaces and cutting development time and costs.

These points reflect patterns I have seen while rescuing FPGA designs. I welcome your experiences with projects that have gone astray.