Module efuse

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-C6)

§Overview

The efuse module provides functionality for reading eFuse data from the ESP32-C6 chip, allowing access to various chip-specific information such as:

MAC address
ADC calibration data
Chip version

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());

Structs§

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

Constants§

ACTIVE_HP_DBIAS: Stores the active hp dbias
ACTIVE_LP_DBIAS: Stores the active lp dbias
ADC1_CAL_VOL_ATTEN0: ADC1 calibration voltage at atten0
ADC1_CAL_VOL_ATTEN1: ADC1 calibration voltage at atten1
ADC1_CAL_VOL_ATTEN2: ADC1 calibration voltage at atten2
ADC1_CAL_VOL_ATTEN3: ADC1 calibration voltage at atten3
ADC1_INIT_CODE_ATTEN0: ADC1 init code at atten0
ADC1_INIT_CODE_ATTEN0_CH0: ADC1 init code at atten0 ch0
ADC1_INIT_CODE_ATTEN0_CH1: ADC1 init code at atten0 ch1
ADC1_INIT_CODE_ATTEN0_CH2: ADC1 init code at atten0 ch2
ADC1_INIT_CODE_ATTEN0_CH3: ADC1 init code at atten0 ch3
ADC1_INIT_CODE_ATTEN0_CH4: ADC1 init code at atten0 ch4
ADC1_INIT_CODE_ATTEN0_CH5: ADC1 init code at atten0 ch5
ADC1_INIT_CODE_ATTEN0_CH6: ADC1 init code at atten0 ch6
ADC1_INIT_CODE_ATTEN1: ADC1 init code at atten1
ADC1_INIT_CODE_ATTEN2: ADC1 init code at atten2
ADC1_INIT_CODE_ATTEN3: ADC1 init code at atten3
BLK_VERSION_MAJOR: BLK_VERSION_MAJOR of BLOCK2
BLK_VERSION_MINOR: BLK_VERSION_MINOR of BLOCK2
BLOCK_KEY0: Key0 or user data
BLOCK_KEY1: Key1 or user data
BLOCK_KEY2: Key2 or user data
BLOCK_KEY3: Key3 or user data
BLOCK_KEY4: Key4 or user data
BLOCK_KEY5: Key5 or user data
BLOCK_SYS_DATA2: System data part 2 (reserved)
BLOCK_USR_DATA: User data
CRYPT_DPA_ENABLE: Represents whether anti-dpa attack is enabled. 1:enabled. 0: disabled
CUSTOM_MAC: Custom MAC
DBIAS_VOL_GAP: Stores the hp and lp dbias vol gap
DISABLE_BLK_VERSION_MAJOR: Disables check of blk version major
DISABLE_WAFER_VERSION_MAJOR: Disables check of wafer version major
DIS_DIRECT_BOOT: Represents whether direct boot mode is disabled or enabled. 1: disabled. 0: enabled
DIS_DOWNLOAD_ICACHE: Represents whether icache is disabled or enabled in Download mode. 1: disabled. 0: enabled
DIS_DOWNLOAD_MANUAL_ENCRYPT: Represents whether flash encrypt function is disabled or enabled(except in SPI boot mode). 1: disabled. 0: enabled
DIS_DOWNLOAD_MODE: Represents whether Download mode is disabled or enabled. 1: disabled. 0: enabled
DIS_FORCE_DOWNLOAD: Represents whether the function that forces chip into download mode is disabled or enabled. 1: disabled. 0: enabled
DIS_ICACHE: Represents whether icache is disabled or enabled. 1: disabled. 0: enabled
DIS_PAD_JTAG: Represents whether JTAG is disabled in the hard way(permanently). 1: disabled. 0: enabled
DIS_TWAI: Represents whether TWAI function is disabled or enabled. 1: disabled. 0: enabled
DIS_USB_JTAG: Represents whether the function of usb switch to jtag is disabled or enabled. 1: disabled. 0: enabled
DIS_USB_SERIAL_JTAG: Represents whether USB-Serial-JTAG is disabled or enabled. 1: disabled. 0: enabled
DIS_USB_SERIAL_JTAG_DOWNLOAD_MODE: Represents whether the USB-Serial-JTAG download function is disabled or enabled. 1: disabled. 0: enabled
DIS_USB_SERIAL_JTAG_ROM_PRINT: Represents whether print from USB-Serial-JTAG is disabled or enabled. 1: disabled. 0: enabled
DSLP_LP_DBG: Stores the dslp lp dbg
DSLP_LP_DBIAS: Stores the dslp lp dbias
ENABLE_SECURITY_DOWNLOAD: Represents whether security download is enabled or disabled. 1: enabled. 0: disabled
FLASH_CAP
FLASH_TEMP
FLASH_TPUW: Represents the flash waiting time after power-up; in unit of ms. When the value less than 15; the waiting time is the programmed value. Otherwise; the waiting time is 2 times the programmed value
FLASH_VENDOR
FORCE_SEND_RESUME: Represents whether ROM code is forced to send a resume command during SPI boot. 1: forced. 0:not forced
JTAG_SEL_ENABLE: Represents whether the selection between usb_to_jtag and pad_to_jtag through strapping gpio15 when both EFUSE_DIS_PAD_JTAG and EFUSE_DIS_USB_JTAG are equal to 0 is enabled or disabled. 1: enabled. 0: disabled
KEY_PURPOSE_0: Represents the purpose of Key0
KEY_PURPOSE_1: Represents the purpose of Key1
KEY_PURPOSE_2: Represents the purpose of Key2
KEY_PURPOSE_3: Represents the purpose of Key3
KEY_PURPOSE_4: Represents the purpose of Key4
KEY_PURPOSE_5: Represents the purpose of Key5
LSLP_HP_DBG: Stores the lslp hp dbg
LSLP_HP_DBIAS: Stores the lslp hp dbias
MAC0: MAC address
MAC1: MAC address
MAC_EXT: Stores the extended bits of MAC address
OCODE: ADC OCode
OPTIONAL_UNIQUE_ID: Optional unique 128-bit ID
PKG_VERSION: Package version
RD_DIS: Disable reading from BlOCK4-10
RESERVED_0_162: reserved
RESERVED_1_136: reserved
RESERVED_2_253: reserved
RESERVED_3_192: reserved
RESERVED_3_248: reserved
RPT4_RESERVED0_0: Reserved
RPT4_RESERVED0_1: Reserved
RPT4_RESERVED0_2: Reserved
RPT4_RESERVED1_0: Reserved
RPT4_RESERVED2_0: Reserved
RPT4_RESERVED2_1: Reserved
RPT4_RESERVED3_0: Reserved
RPT4_RESERVED3_1: Reserved
RPT4_RESERVED3_2: Reserved
RPT4_RESERVED3_3: Reserved
RPT4_RESERVED3_4: Reserved
RPT4_RESERVED3_5: Reserved
RPT4_RESERVED4_0: Reserved
SECURE_BOOT_AGGRESSIVE_REVOKE: Represents whether revoking aggressive secure boot is enabled or disabled. 1: enabled. 0: disabled
SECURE_BOOT_DISABLE_FAST_WAKE: Represents whether FAST VERIFY ON WAKE is disabled or enabled when Secure Boot is enabled. 1: disabled. 0: enabled
SECURE_BOOT_EN: Represents whether secure boot is enabled or disabled. 1: enabled. 0: disabled
SECURE_BOOT_KEY_REVOKE0: Revoke 1st secure boot key
SECURE_BOOT_KEY_REVOKE1: Revoke 2nd secure boot key
SECURE_BOOT_KEY_REVOKE2: Revoke 3rd secure boot key
SECURE_VERSION: Represents the version used by ESP-IDF anti-rollback feature
SEC_DPA_LEVEL: Represents the spa secure level by configuring the clock random divide mode
SOFT_DIS_JTAG: Represents whether JTAG is disabled in soft way. Odd number: disabled. Even number: enabled
SPI_BOOT_CRYPT_CNT: Enables flash encryption when 1 or 3 bits are set and disables otherwise
SPI_DOWNLOAD_MSPI_DIS: Represents whether SPI0 controller during boot_mode_download is disabled or enabled. 1: disabled. 0: enabled
SPI_PAD_CONF_1: Stores the first part of SPI_PAD_CONF
SPI_PAD_CONF_2: Stores the second part of SPI_PAD_CONF
SWAP_UART_SDIO_EN: Represents whether pad of uart and sdio is swapped or not. 1: swapped. 0: not swapped
SYS_DATA_PART0_2: Stores the second 32 bits of the zeroth part of system data
TEMP_CALIB: Temperature calibration data
UART_PRINT_CONTROL: Set the default UARTboot message output mode
USB_DREFH: Represents the single-end input threshold vrefh; 1.76 V to 2 V with step of 80 mV
USB_DREFL: Represents the single-end input threshold vrefl; 1.76 V to 2 V with step of 80 mV
USB_EXCHG_PINS: Represents whether the D+ and D- pins is exchanged. 1: exchanged. 0: not exchanged
VDD_SPI_AS_GPIO: Represents whether vdd spi pin is functioned as gpio. 1: functioned. 0: not functioned
WAFER_VERSION_MAJOR
WAFER_VERSION_MINOR
WDT_DELAY_SEL: Represents whether RTC watchdog timeout threshold is selected at startup. 1: selected. 0: not selected
WR_DIS: Disable programming of individual eFuses

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