Safely obtain static mutable reference in no_std

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  • rtic

    Real-Time Interrupt-driven Concurrency (RTIC) framework for ARM Cortex-M microcontrollers

  • RTIC lets you do this safely. The ingredient you need to do this in a sound way at no cost is control over the application's entry point. That way, you can guarantee that your code only runs once, and (unsafely) take a mutable reference to a static mut. That's what RTIC does (and it hides the unsafe behind a safe API). It also does a lot more to allow safe and cheap resource sharing and message passing across nested interrupts.

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