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May's giveaway is a STM32F411RE, mbed-Enabled Development Nucleo-64 series ARM® Cortex®-M4 MCU 32-Bit Embedded Evaluation Board. As it has a debug port, it's perfect for learning about working with ARM Cortex M4 MCUs. Enter the contest via this link.

Spurious vector! Bad DMA transfer! A null pointer was dereferenced!

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