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Well, hello there Sentinels, today we're going beyond the final test.
We’ve all been there, haven’t we, or maybe not? You spend six hours carefully routing your logic, hit 'Generate Bitstream', and then wander off for a coffee, or perhaps a full roast dinner, while the tools do their thing. You return, load the image onto the board, and nothing. Blank screen, static LED, or, if you’re really lucky, that infamous 'blink of death' which is the FPGA’s way of saying your timing is in tatters.
In the world of FPGA (Field-Programmable Gate Array) development, the 'Wait and Pray' approach is a fast track to burnout and a caffeine addiction. Enter formal verification. Most developers treat verification like a final exam, something you cram for at the end, when it’s far too late to fix your dodgy study habits. FPGAs are now the backbone of safety-critical industries, from avionics and nuclear control to self-driving cars and medical kit. Their flexibility, reconfigurability, and parallelism are all very clever, but they also bring a whole new set of verification headaches. Enter formal verification, the gold standard for making sure your FPGA-based system behaves itself under every possible scenario, not just the ones you thought to test. Below, I’ll give you a whistle-stop tour of the discipline, with a nod to the key academic work and what the practitioners are actually doing.
But before I get too carried away with the introductions, let’s see what the internet has coughed up for us this week.
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