Jumping from MCUs to FPGAs - 5 things you need to know

Duane Benson

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Are you a microcontroller expert beckoned by the siren song of the FPGA? Not long ago, that was me. FPGA-expert friends of mine regularly extolled the virtues of these mysterious components and I wanted in. When I made the leap, I found a world seemingly very familiar, but in reality, vastly different. I found that my years of C programming and microcontroller use often gave pre preconceived interpretations of FPGA resource material which resulted in eye-roll class mistakes in my code. I’ve gleaned five things of vital importance to help you make that transition faster than I did.

Summary

Duane Benson presents five practical lessons for developers moving from microcontrollers to FPGAs. The article explains the key differences in thinking, common pitfalls (like assuming sequential C semantics), and concrete hardware concepts—concurrency, clock domains, language/tool choices, and mixed HW/SW design—to accelerate the transition.

Key Takeaways

Recognize concurrency in hardware and write RTL with parallel execution in mind to avoid C-style sequential assumptions.
Manage clock domains and apply synchronization patterns to prevent metastability and data corruption across domains.
Map algorithms to hardware using pipelining and parallelism to meet throughput and latency requirements instead of relying on faster CPU clocking.
Choose the appropriate HDL (Verilog/SystemVerilog or VHDL) and understand synthesis vs. simulation differences and synthesis-friendly coding styles.
Integrate embedded processors, IP interfaces, and vendor toolflows to build mixed HW/SW systems and streamline debugging.

Who Should Read This

Embedded software engineers and MCU developers with some project experience who want a practical, shorter path into FPGA development and hardware design thinking.

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