Struct Efuse

pub struct Efuse;

Available on crate feature unstable only.

A struct representing the eFuse functionality of the chip.

Implementations

impl Efuse

pub fn core_count() -> u32

Returns the number of CPUs available on the chip.

While ESP32 chips usually come with two mostly equivalent CPUs (protocol CPU and application CPU), the application CPU is unavailable on some.

pub fn max_cpu_frequency() -> Rate

Returns the maximum rated clock of the CPU in MHz.

Note that the actual clock may be lower, depending on the current power configuration of the chip, clock source, and other settings.

pub fn is_bluetooth_enabled() -> bool

Returns the CHIP_VER_DIS_BT eFuse value.

pub fn chip_type() -> ChipType

Returns the CHIP_VER_PKG eFuse value.

pub fn flash_encryption() -> bool

Get status of SPI boot encryption.

impl Efuse

pub fn read_base_mac_address() -> [u8; 6]

Reads chip’s MAC address from the eFuse storage.

pub fn read_field_le<T: AnyBitPattern>(field: EfuseField) -> T

Read field value in a little-endian order

pub fn read_bit(field: EfuseField) -> bool

Read bit value.

This function panics if the field’s bit length is not equal to 1.

impl Efuse

pub fn set_mac_address(mac: [u8; 6]) -> Result<(), SetMacError>

Set the base mac address

The new value will be returned by read_mac_address instead of the one hard-coded in eFuse. This does not persist across device resets.

Can only be called once. Returns Err(SetMacError::AlreadySet) otherwise.

pub fn mac_address() -> [u8; 6]

Get base mac address

By default this reads the base mac address from eFuse, but it can be overridden by set_mac_address.