esp_hal

Module efuse

Source
Available on crate feature unstable only.
Expand description

§Stability

This API is marked as unstable and is only available when the unstable crate feature is enabled. This comes with no stability guarantees, and could be changed or removed at any time.

§Reading of eFuses (ESP32)

§Overview

The efuse module provides functionality for reading eFuse data from the ESP32 chip, allowing access to various chip-specific information such as:

  • MAC address
  • Chip type, revision
  • Core count
  • Max CPU frequency

and more. It is useful for retrieving chip-specific configuration and identification data during runtime.

The Efuse struct represents the eFuse peripheral and is responsible for reading various eFuse fields and values.

§Examples

§Read data from the eFuse storage.


let mac_address = Efuse::read_base_mac_address();

println!(
    "MAC: {:#X}:{:#X}:{:#X}:{:#X}:{:#X}:{:#X}",
    mac_address[0],
    mac_address[1],
    mac_address[2],
    mac_address[3],
    mac_address[4],
    mac_address[5]
);

println!("MAC address {:02x?}", Efuse::mac_address());
println!("Flash Encryption {:?}", Efuse::flash_encryption());
println!("Core Count {}", Efuse::core_count());
println!("Bluetooth enabled {}", Efuse::is_bluetooth_enabled());
println!("Chip type {:?}", Efuse::chip_type());
println!("Max CPU clock {:?}", Efuse::max_cpu_frequency());

Structs§

  • Efuse
    A struct representing the eFuse functionality of the chip.

Enums§

  • ChipType
    Representing different types of ESP32 chips.

Constants§