embedded-savegame 0.3.0

Savegame library for embedded with power-fail safety and wear leveling
Documentation 
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//! AT24Cxx EEPROM support
//!
//! This module provides a [`Flash`](crate::storage::Flash) implementation for AT24Cxx series EEPROM chips.
//! Available with the `eeprom24x` feature.
//!
//! Supports EEPROM chips like AT24C32, AT24C64, AT24C128, etc. using the `eeprom24x` crate's driver.

use crate::storage::Flash;
use core::fmt;
use eeprom24x::Eeprom24xTrait;

/// Flash trait implementation for AT24Cxx EEPROM chips
impl<T: Eeprom24xTrait> Flash for T
where
    T::Error: fmt::Debug,
{
    type Error = eeprom24x::Error<T::Error>;

    fn read(&mut self, addr: u32, buf: &mut [u8]) -> Result<(), Self::Error> {
        self.read_data(addr, buf)?;
        Ok(())
    }

    fn write(&mut self, addr: u32, data: &mut [u8]) -> Result<(), Self::Error> {
        self.write_page(addr, data)?;
        while self.read_current_address().is_err() {}
        Ok(())
    }

    fn erase(&mut self, addr: u32) -> Result<(), Self::Error> {
        if self.read_byte(addr)? != 0xFF {
            self.write_byte(addr, 0xFF)?;
            while self.read_current_address().is_err() {}
        }
        Ok(())
    }
}