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Remove runtime offset and size assertions

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This commit is contained in:
Rasmus Melchior Jacobsen 2023-05-26 22:07:23 +02:00
parent 62e799da09
commit e495473fc3
3 changed files with 18 additions and 20 deletions
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1
embassy-embedded-hal/src/flash/mem_flash.rs
View file

@ -1,6 +1,7 @@
use alloc::vec::Vec;
use embedded_storage::nor_flash::{ErrorType, NorFlash, ReadNorFlash};
#[cfg(feature = "nightly")]
use embedded_storage_async::nor_flash::{NorFlash as AsyncNorFlash, ReadNorFlash as AsyncReadNorFlash};
extern crate alloc;

2
embassy-embedded-hal/src/flash/mod.rs
View file

@ -3,7 +3,9 @@
mod concat_flash;
#[cfg(test)]
pub(crate) mod mem_flash;
#[cfg(feature = "nightly")]
mod partition;
pub use concat_flash::ConcatFlash;
#[cfg(feature = "nightly")]
pub use partition::Partition;

35
embassy-embedded-hal/src/flash/partition.rs
View file

@ -1,7 +1,6 @@
use embassy_sync::blocking_mutex::raw::RawMutex;
use embassy_sync::mutex::Mutex;
use embedded_storage::nor_flash::{ErrorType, NorFlashError, NorFlashErrorKind};
#[cfg(feature = "nightly")]
use embedded_storage_async::nor_flash::{NorFlash, ReadNorFlash};
/// A logical partition of an underlying shared flash
@ -11,7 +10,7 @@ use embedded_storage_async::nor_flash::{NorFlash, ReadNorFlash};
/// There is no guarantee that muliple partitions on the same flash
/// operate on mutually exclusive ranges - such a separation is up to
/// the user to guarantee.
pub struct Partition<'a, M: RawMutex, T> {
pub struct Partition<'a, M: RawMutex, T: NorFlash> {
flash: &'a Mutex<M, T>,
offset: u32,
size: u32,
@ -20,14 +19,20 @@ pub struct Partition<'a, M: RawMutex, T> {
#[derive(Debug)]
#[cfg_attr(feature = "defmt", derive(defmt::Format))]
pub enum Error<T> {
Partition,
OutOfBounds,
Flash(T),
}
impl<'a, M: RawMutex, T> Partition<'a, M, T> {
impl<'a, M: RawMutex, T: NorFlash> Partition<'a, M, T> {
/// Create a new partition
pub const fn new(flash: &'a Mutex<M, T>, offset: u32, size: u32) -> Self {
if offset % T::READ_SIZE as u32 != 0 || offset % T::WRITE_SIZE as u32 != 0 || offset % T::ERASE_SIZE as u32 != 0
{
panic!("Partition offset must be a multiple of read, write and erase size");
}
if size % T::READ_SIZE as u32 != 0 || size % T::WRITE_SIZE as u32 != 0 || size % T::ERASE_SIZE as u32 != 0 {
panic!("Partition size must be a multiple of read, write and erase size");
}
Self { flash, offset, size }
}
}
@ -35,25 +40,21 @@ impl<'a, M: RawMutex, T> Partition<'a, M, T> {
impl<T: NorFlashError> NorFlashError for Error<T> {
fn kind(&self) -> NorFlashErrorKind {
match self {
Error::Partition => NorFlashErrorKind::Other,
Error::OutOfBounds => NorFlashErrorKind::OutOfBounds,
Error::Flash(f) => f.kind(),
}
}
}
impl<M: RawMutex, T: ErrorType> ErrorType for Partition<'_, M, T> {
impl<M: RawMutex, T: NorFlash> ErrorType for Partition<'_, M, T> {
type Error = Error<T::Error>;
}
#[cfg(feature = "nightly")]
impl<M: RawMutex, T: ReadNorFlash> ReadNorFlash for Partition<'_, M, T> {
impl<M: RawMutex, T: NorFlash> ReadNorFlash for Partition<'_, M, T> {
const READ_SIZE: usize = T::READ_SIZE;
async fn read(&mut self, offset: u32, bytes: &mut [u8]) -> Result<(), Self::Error> {
if self.offset % T::READ_SIZE as u32 != 0 || self.size % T::READ_SIZE as u32 != 0 {
return Err(Error::Partition);
}
if offset + bytes.len() as u32 > self.size {
return Err(Error::OutOfBounds);
}
@ -73,9 +74,6 @@ impl<M: RawMutex, T: NorFlash> NorFlash for Partition<'_, M, T> {
const ERASE_SIZE: usize = T::ERASE_SIZE;
async fn write(&mut self, offset: u32, bytes: &[u8]) -> Result<(), Self::Error> {
if self.offset % T::WRITE_SIZE as u32 != 0 || self.size % T::WRITE_SIZE as u32 != 0 {
return Err(Error::Partition);
}
if offset + bytes.len() as u32 > self.size {
return Err(Error::OutOfBounds);
}
@ -85,9 +83,6 @@ impl<M: RawMutex, T: NorFlash> NorFlash for Partition<'_, M, T> {
}
async fn erase(&mut self, from: u32, to: u32) -> Result<(), Self::Error> {
if self.offset % T::ERASE_SIZE as u32 != 0 || self.size % T::ERASE_SIZE as u32 != 0 {
return Err(Error::Partition);
}
if to > self.size {
return Err(Error::OutOfBounds);
}
@ -110,10 +105,10 @@ mod tests {
#[futures_test::test]
async fn can_read() {
let mut flash = MemFlash::<1024, 128, 4>::default();
flash.mem[12..20].fill(0xAA);
flash.mem[132..132 + 8].fill(0xAA);
let flash = Mutex::<NoopRawMutex, _>::new(flash);
let mut partition = Partition::new(&flash, 8, 12);
let mut partition = Partition::new(&flash, 128, 256);
let mut read_buf = [0; 8];
partition.read(4, &mut read_buf).await.unwrap();
@ -126,13 +121,13 @@ mod tests {
let flash = MemFlash::<1024, 128, 4>::default();
let flash = Mutex::<NoopRawMutex, _>::new(flash);
let mut partition = Partition::new(&flash, 8, 12);
let mut partition = Partition::new(&flash, 128, 256);
let write_buf = [0xAA; 8];
partition.write(4, &write_buf).await.unwrap();
let flash = flash.try_lock().unwrap();
assert!(flash.mem[12..20].iter().position(|&x| x != 0xAA).is_none());
assert!(flash.mem[132..132 + 8].iter().position(|&x| x != 0xAA).is_none());
}
#[futures_test::test]