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Firmware fundamentals: endianness, ring buffers and the stack

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NvidiaCodingLast asked Jul 2026

Answer and code short firmware questions: what big- and little-endian mean and how to detect or convert byte order, how a ring buffer works between an interrupt handler and the main loop (and what must be volatile or atomic), and how the stack behaves: frames, local variables, recursion depth and what a stack overflow looks like on a microcontroller.

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