![]() These diagnostics allow one to test not only the 64 kB of Flash, but also the 64 kB of ‘hidden’ Flash that’s often found on these MCUs (rebadged 128 kB STM32F103 cores). Often only testing the MCU’s actual functionality can give clarity on whether it’s a real STM32 MCU. It’s clear that some of those ‘Blue Pill’ boards obviously do not have a genuine STM32 MCU on them, as they do not have the STM32 markings on them, while others fake those markings on the package and identifying can be hard to impossible. ![]() ![]() We have covered those clone MCUs previously. After more than a year of work, the Blue Pill Diagnostics project is now ready for prime time. ![]() With the market for STM32F103C8-based ‘Blue Pill’ boards slowly being overrun with boards that contain either a cloned, fake or outright broken chip, really wanted to have an easy, automated way to quickly detect whether a new board contains genuine STM32 silicon, or some fake that tries to look the part.
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