Electrically Erasable Programmable Read-Only Memory (EEPROM)

Overview

The EEPROM API provides read and write access to Electrically Erasable Programmable Read-Only Memory (EEPROM) devices.

EEPROMs have an erase block size of 1 byte, a long lifetime, and allow overwriting data on byte-by-byte access.

Configuration Options

Related configuration options:

• CONFIG_EEPROM

API Reference

group eeprom_interface

EEPROM Interface.

Typedefs

typedef int (*eeprom_api_read)(const struct device *dev, off_t offset, void *data, size_t len)

typedef int (*eeprom_api_write)(const struct device *dev, off_t offset, const void *data, size_t len)

typedef size_t (*eeprom_api_size)(const struct device *dev)

Functions

int eeprom_read(const struct device *dev, off_t offset, void *data, size_t len)

Read data from EEPROM.

Parameters:

• dev – EEPROM device

• offset – Address offset to read from.

• data – Buffer to store read data.

• len – Number of bytes to read.

Returns:

0 on success, negative errno code on failure.

int eeprom_write(const struct device *dev, off_t offset, const void *data, size_t len)

Write data to EEPROM.

Parameters:

• dev – EEPROM device

• offset – Address offset to write data to.

• data – Buffer with data to write.

• len – Number of bytes to write.

Returns:

0 on success, negative errno code on failure.

size_t eeprom_get_size(const struct device *dev)

Get the size of the EEPROM in bytes.

Parameters:

• dev – EEPROM device.

Returns:

EEPROM size in bytes.

struct eeprom_driver_api

#include <eeprom.h>