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|
use embassy_hal_common::{into_ref, PeripheralRef};
use embedded_storage::nor_flash::{ErrorType, NorFlash, NorFlashError, NorFlashErrorKind, ReadNorFlash};
pub use crate::pac::{ERASE_SIZE, ERASE_VALUE, FLASH_BASE, FLASH_SIZE, WRITE_SIZE};
use crate::peripherals::FLASH;
use crate::Peripheral;
const FLASH_END: usize = FLASH_BASE + FLASH_SIZE;
#[cfg_attr(any(flash_wl, flash_wb, flash_l0, flash_l1, flash_l4), path = "l.rs")]
#[cfg_attr(flash_f3, path = "f3.rs")]
#[cfg_attr(flash_f4, path = "f4.rs")]
#[cfg_attr(flash_f7, path = "f7.rs")]
#[cfg_attr(flash_h7, path = "h7.rs")]
mod family;
pub struct Flash<'d> {
_inner: PeripheralRef<'d, FLASH>,
}
impl<'d> Flash<'d> {
pub fn new(p: impl Peripheral<P = FLASH> + 'd) -> Self {
into_ref!(p);
Self { _inner: p }
}
pub fn blocking_read(&mut self, offset: u32, bytes: &mut [u8]) -> Result<(), Error> {
let offset = FLASH_BASE as u32 + offset;
if offset as usize >= FLASH_END || offset as usize + bytes.len() > FLASH_END {
return Err(Error::Size);
}
let flash_data = unsafe { core::slice::from_raw_parts(offset as *const u8, bytes.len()) };
bytes.copy_from_slice(flash_data);
Ok(())
}
pub fn blocking_write(&mut self, offset: u32, buf: &[u8]) -> Result<(), Error> {
let offset = FLASH_BASE as u32 + offset;
if offset as usize + buf.len() > FLASH_END {
return Err(Error::Size);
}
if offset as usize % WRITE_SIZE != 0 || buf.len() as usize % WRITE_SIZE != 0 {
return Err(Error::Unaligned);
}
trace!("Writing {} bytes at 0x{:x}", buf.len(), offset);
self.clear_all_err();
unsafe {
family::unlock();
let res = family::blocking_write(offset, buf);
family::lock();
res
}
}
pub fn blocking_erase(&mut self, from: u32, to: u32) -> Result<(), Error> {
let from = FLASH_BASE as u32 + from;
let to = FLASH_BASE as u32 + to;
if to < from || to as usize > FLASH_END {
return Err(Error::Size);
}
if (from as usize % ERASE_SIZE) != 0 || (to as usize % ERASE_SIZE) != 0 {
return Err(Error::Unaligned);
}
self.clear_all_err();
unsafe {
family::unlock();
let res = family::blocking_erase(from, to);
family::lock();
res
}
}
fn clear_all_err(&mut self) {
unsafe { family::clear_all_err() };
}
}
impl Drop for Flash<'_> {
fn drop(&mut self) {
unsafe { family::lock() };
}
}
#[derive(Debug, Copy, Clone, PartialEq, Eq)]
#[cfg_attr(feature = "defmt", derive(defmt::Format))]
pub enum Error {
Prog,
Size,
Miss,
Seq,
Protected,
Unaligned,
Parallelism,
}
impl<'d> ErrorType for Flash<'d> {
type Error = Error;
}
impl NorFlashError for Error {
fn kind(&self) -> NorFlashErrorKind {
match self {
Self::Size => NorFlashErrorKind::OutOfBounds,
Self::Unaligned => NorFlashErrorKind::NotAligned,
_ => NorFlashErrorKind::Other,
}
}
}
impl<'d> ReadNorFlash for Flash<'d> {
const READ_SIZE: usize = WRITE_SIZE;
fn read(&mut self, offset: u32, bytes: &mut [u8]) -> Result<(), Self::Error> {
self.blocking_read(offset, bytes)
}
fn capacity(&self) -> usize {
FLASH_SIZE
}
}
impl<'d> NorFlash for Flash<'d> {
const WRITE_SIZE: usize = WRITE_SIZE;
const ERASE_SIZE: usize = ERASE_SIZE;
fn erase(&mut self, from: u32, to: u32) -> Result<(), Self::Error> {
self.blocking_erase(from, to)
}
fn write(&mut self, offset: u32, bytes: &[u8]) -> Result<(), Self::Error> {
self.blocking_write(offset, bytes)
}
}
/*
cfg_if::cfg_if! {
if #[cfg(feature = "nightly")]
{
use embedded_storage_async::nor_flash::{AsyncNorFlash, AsyncReadNorFlash};
use core::future::Future;
impl<'d> AsyncNorFlash for Flash<'d> {
const WRITE_SIZE: usize = <Self as NorFlash>::WRITE_SIZE;
const ERASE_SIZE: usize = <Self as NorFlash>::ERASE_SIZE;
type WriteFuture<'a> = impl Future<Output = Result<(), Self::Error>> + 'a where Self: 'a;
fn write<'a>(&'a mut self, offset: u32, data: &'a [u8]) -> Self::WriteFuture<'a> {
async move {
todo!()
}
}
type EraseFuture<'a> = impl Future<Output = Result<(), Self::Error>> + 'a where Self: 'a;
fn erase<'a>(&'a mut self, from: u32, to: u32) -> Self::EraseFuture<'a> {
async move {
todo!()
}
}
}
impl<'d> AsyncReadNorFlash for Flash<'d> {
const READ_SIZE: usize = <Self as ReadNorFlash>::READ_SIZE;
type ReadFuture<'a> = impl Future<Output = Result<(), Self::Error>> + 'a where Self: 'a;
fn read<'a>(&'a mut self, address: u32, data: &'a mut [u8]) -> Self::ReadFuture<'a> {
async move {
todo!()
}
}
fn capacity(&self) -> usize {
FLASH_SIZE
}
}
}
}
*/
|
