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use core::future::Future;
use core::pin::Pin;
#[derive(Copy, Clone, Debug, Eq, PartialEq)]
#[cfg_attr(feature = "defmt", derive(defmt::Format))]
#[non_exhaustive]
pub enum Error {
Failed,
AddressMisaligned,
BufferMisaligned,
}
pub trait Flash {
type ReadFuture<'a>: Future<Output = Result<(), Error>>;
type WriteFuture<'a>: Future<Output = Result<(), Error>>;
type ErasePageFuture<'a>: Future<Output = Result<(), Error>>;
/// Reads data from the flash device.
///
/// address must be a multiple of self.read_size().
/// buf.len() must be a multiple of self.read_size().
fn read<'a>(self: Pin<&'a mut Self>, address: usize, buf: &'a mut [u8])
-> Self::ReadFuture<'a>;
/// Writes data to the flash device.
///
/// address must be a multiple of self.write_size().
/// buf.len() must be a multiple of self.write_size().
fn write<'a>(self: Pin<&'a mut Self>, address: usize, buf: &'a [u8]) -> Self::WriteFuture<'a>;
/// Erases a single page from the flash device.
///
/// address must be a multiple of self.erase_size().
fn erase<'a>(self: Pin<&'a mut Self>, address: usize) -> Self::ErasePageFuture<'a>;
/// Returns the total size, in bytes.
/// This is not guaranteed to be a power of 2.
fn size(&self) -> usize;
/// Returns the read size in bytes.
/// This is guaranteed to be a power of 2.
fn read_size(&self) -> usize;
/// Returns the write size in bytes.
/// This is guaranteed to be a power of 2.
fn write_size(&self) -> usize;
/// Returns the erase size in bytes.
/// This is guaranteed to be a power of 2.
fn erase_size(&self) -> usize;
}
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