Summary

This blog explains three practical, often-missed differences engineers encounter when moving from MCU firmware to FPGA/HDL design: code reuse vs templating, metastability and clock-domain crossings, and blocking vs non-blocking operations. It shows how these differences affect design patterns, verification, and system reliability so MCU developers can avoid common FPGA pitfalls.

Key Takeaways

• Recognize when software-style code reuse doesn't map to HDL and adopt templating/parameterized modules and generate constructs instead of copy-paste.
• Apply proper clock-domain crossing techniques and synchronizers to mitigate metastability and reduce MTBF risks.
• Distinguish blocking and non-blocking assignment semantics in Verilog/SystemVerilog and understand their impact on simulation behavior versus real hardware.
• Design targeted testbenches and verification steps to catch concurrency and timing bugs introduced by HDL and multiple clock domains.

Who Should Read This

Firmware engineers and embedded developers with MCU experience who are beginning to design or integrate FPGAs/HDL and want practical guidance to avoid common hardware-software pitfalls.

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