embassy/embassy-nrf/src/util.rs

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const SRAM_LOWER: usize = 0x2000_0000;
const SRAM_UPPER: usize = 0x3000_0000;
/// Does this slice reside entirely within RAM?
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pub(crate) fn slice_in_ram<T>(slice: &[T]) -> bool {
let ptr = slice.as_ptr() as usize;
ptr >= SRAM_LOWER && (ptr + slice.len() * core::mem::size_of::<T>()) < SRAM_UPPER
}
/// Return an error if slice is not in RAM.
#[cfg(not(feature = "nrf51"))]
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pub(crate) fn slice_in_ram_or<T, E>(slice: &[T], err: E) -> Result<(), E> {
if slice.is_empty() || slice_in_ram(slice) {
Ok(())
} else {
Err(err)
}
}