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1 change: 1 addition & 0 deletions CHANGELOG.md
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Expand Up @@ -7,6 +7,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.

## Unreleased

- Add `WordclearNorFlash` to encode relaxed `write` requirements similar to `MultiwriteNorFlash` but that allows for flashes with ECC.
- Add `start()` and `end()` method to the `Region` trait.
- Much faster `OverlapIterator`.

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9 changes: 9 additions & 0 deletions src/nor_flash.rs
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Expand Up @@ -178,6 +178,15 @@ impl<T: NorFlash> NorFlash for &mut T {
}
}

/// Marker trait for NorFlash relaxing the restrictions on `write`.
///
/// Writes to the same word twice are now allowed as long as the second write is all 0s.
/// This is common for flashes that have ECC, where after the first write only a complete clear of
/// the word is allowed after initial write.
pub trait WordclearNorFlash: NorFlash {}

impl<T> WordclearNorFlash for T where T: MultiwriteNorFlash {}

/// Marker trait for NorFlash relaxing the restrictions on `write`.
///
/// Writes to the same word twice are now allowed. The result is the logical AND of the
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