embassy/embassy-stm32/src/flash/mod.rs
2024-04-14 00:45:53 +02:00

141 lines
3.5 KiB
Rust

//! Flash memory (FLASH)
use embedded_storage::nor_flash::{NorFlashError, NorFlashErrorKind};
#[cfg(flash_f4)]
mod asynch;
#[cfg(flash)]
mod common;
#[cfg(flash_f4)]
pub use asynch::InterruptHandler;
#[cfg(flash)]
pub use common::*;
pub use crate::_generated::flash_regions::*;
pub use crate::_generated::MAX_ERASE_SIZE;
pub use crate::pac::{FLASH_BASE, FLASH_SIZE, WRITE_SIZE};
/// Get whether the default flash layout is being used.
///
/// In some chips, dual-bank is not default. This will then return `false`
/// when dual-bank is enabled.
pub fn is_default_layout() -> bool {
family::is_default_layout()
}
/// Get all flash regions.
pub fn get_flash_regions() -> &'static [&'static FlashRegion] {
family::get_flash_regions()
}
/// Read size (always 1)
pub const READ_SIZE: usize = 1;
/// Blocking flash mode typestate.
pub enum Blocking {}
/// Async flash mode typestate.
pub enum Async {}
/// Flash memory region
#[derive(Debug)]
#[cfg_attr(feature = "defmt", derive(defmt::Format))]
pub struct FlashRegion {
/// Bank number.
pub bank: FlashBank,
/// Absolute base address.
pub base: u32,
/// Size in bytes.
pub size: u32,
/// Erase size (sector size).
pub erase_size: u32,
/// Minimum write size.
pub write_size: u32,
/// Erase value (usually `0xFF`, but is `0x00` in some chips)
pub erase_value: u8,
pub(crate) _ensure_internal: (),
}
impl FlashRegion {
/// Absolute end address.
pub const fn end(&self) -> u32 {
self.base + self.size
}
/// Number of sectors in the region.
pub const fn sectors(&self) -> u8 {
(self.size / self.erase_size) as u8
}
}
/// Flash sector.
#[derive(Debug, PartialEq)]
#[cfg_attr(feature = "defmt", derive(defmt::Format))]
pub struct FlashSector {
/// Bank number.
pub bank: FlashBank,
/// Sector number within the bank.
pub index_in_bank: u8,
/// Absolute start address.
pub start: u32,
/// Size in bytes.
pub size: u32,
}
/// Flash bank.
#[derive(Clone, Copy, Debug, PartialEq)]
#[cfg_attr(feature = "defmt", derive(defmt::Format))]
pub enum FlashBank {
/// Bank 1
Bank1 = 0,
/// Bank 2
Bank2 = 1,
}
#[cfg_attr(any(flash_l0, flash_l1, flash_l4, flash_wl, flash_wb), path = "l.rs")]
#[cfg_attr(flash_f0, path = "f0.rs")]
#[cfg_attr(any(flash_f1, flash_f3), path = "f1f3.rs")]
#[cfg_attr(flash_f4, path = "f4.rs")]
#[cfg_attr(flash_f7, path = "f7.rs")]
#[cfg_attr(any(flash_g0, flash_g4), path = "g.rs")]
#[cfg_attr(flash_h7, path = "h7.rs")]
#[cfg_attr(flash_h7ab, path = "h7.rs")]
#[cfg_attr(flash_u5, path = "u5.rs")]
#[cfg_attr(flash_h50, path = "h50.rs")]
#[cfg_attr(flash_u0, path = "u0.rs")]
#[cfg_attr(
not(any(
flash_l0, flash_l1, flash_l4, flash_wl, flash_wb, flash_f0, flash_f1, flash_f3, flash_f4, flash_f7, flash_g0,
flash_g4, flash_h7, flash_h7ab, flash_u5, flash_h50, flash_u0
)),
path = "other.rs"
)]
mod family;
#[allow(unused_imports)]
pub use family::*;
/// Flash error
///
/// See STM32 Reference Manual for your chip for details.
#[allow(missing_docs)]
#[derive(Debug, Copy, Clone, PartialEq, Eq)]
#[cfg_attr(feature = "defmt", derive(defmt::Format))]
pub enum Error {
Prog,
Size,
Miss,
Seq,
Protected,
Unaligned,
Parallelism,
}
impl NorFlashError for Error {
fn kind(&self) -> NorFlashErrorKind {
match self {
Self::Size => NorFlashErrorKind::OutOfBounds,
Self::Unaligned => NorFlashErrorKind::NotAligned,
_ => NorFlashErrorKind::Other,
}
}
}