can't burn_efuse esp32c3 (ESPTOOL-488)

[stingdau1206]

Operating System

ubuntu 22

Esptool Version

v3.3.2

Python Version

3.10.4

Chip Description

esp32c3

Device Description

No response

Hardware Configuration

No response

How is Esptool Run

terminal

Full Esptool Command Line that Was Run

espefuse.py burn_efuse SPI_BOOT_CRYPT_CNT

Esptool Output

Connecting...
Detecting chip type... ESP32-C3
espefuse.py v3.3.2-dev

=== Run "burn_efuse" command ===
The efuses to burn:
  from BLOCK0
     - SPI_BOOT_CRYPT_CNT

Burning efuses:
Traceback (most recent call last):
  File "/home/khoatn/.espressif/python_env/idf4.3_py3.10_env/lib/python3.10/site-packages/bitstring.py", line 831, in __new__
    return _cache[auto]
KeyError: 'uint:3=15'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/khoatn/.espressif/python_env/idf4.3_py3.10_env/lib/python3.10/site-packages/bitstring.py", line 1296, in _init_with_token
    b = cls(**{_tokenname_to_initialiser[name]: value})
KeyError: 'uint'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/khoatn/.espressif/python_env/idf4.3_py3.10_env/lib/python3.10/site-packages/bitstring.py", line 876, in _initialise
    init_without_length_or_offset[k](self, v)
KeyError: 'uint'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/khoatn/esp/esp-idf_v4.3.3/components/esptool_py/esptool/espefuse.py", line 198, in <module>
    _main()
  File "/home/khoatn/esp/esp-idf_v4.3.3/components/esptool_py/esptool/espefuse.py", line 191, in _main
    main()
  File "/home/khoatn/esp/esp-idf_v4.3.3/components/esptool_py/esptool/espefuse.py", line 178, in main
    operation_func(esp, efuses, args)
  File "/home/khoatn/esp/esp-idf_v4.3.3/components/esptool_py/esptool/espressif/efuse/base_operations.py", line 228, in burn_efuse
    print("\n    - '{}' ({}) {} -> {}".format(efuse.name, efuse.description, efuse.get_bitstring(), efuse.convert_to_bitstring(new_value)))
  File "/home/khoatn/esp/esp-idf_v4.3.3/components/esptool_py/esptool/espressif/efuse/base_fields.py", line 491, in convert_to_bitstring
    return BitArray(self.efuse_type + "={}".format(new_value))
  File "/home/khoatn/.espressif/python_env/idf4.3_py3.10_env/lib/python3.10/site-packages/bitstring.py", line 3117, in __new__
    y = Bits.__new__(BitArray, auto, length, offset, **kwargs)
  File "/home/khoatn/.espressif/python_env/idf4.3_py3.10_env/lib/python3.10/site-packages/bitstring.py", line 844, in __new__
    x._datastore._appendstore(Bits._init_with_token(*token)._datastore)
  File "/home/khoatn/.espressif/python_env/idf4.3_py3.10_env/lib/python3.10/site-packages/bitstring.py", line 1301, in _init_with_token
    b = cls(**{name: int(value), 'length': token_length})
  File "/home/khoatn/.espressif/python_env/idf4.3_py3.10_env/lib/python3.10/site-packages/bitstring.py", line 855, in __new__
    x._initialise(auto, length, offset, **kwargs)
  File "/home/khoatn/.espressif/python_env/idf4.3_py3.10_env/lib/python3.10/site-packages/bitstring.py", line 881, in _initialise
    init_with_length_only[k](self, v, length)
  File "/home/khoatn/.espressif/python_env/idf4.3_py3.10_env/lib/python3.10/site-packages/bitstring.py", line 1461, in _setuint
    raise CreationError(msg, uint, length, (1 << length) - 1)
bitstring.CreationError: 15 is too large an unsigned integer for a bitstring of length 3. The allowed range is [0, 7].

More Information

No response

Other Steps to Reproduce

No response

I Have Read the Troubleshooting Guide

• I confirm I have read the troubleshooting guide.

[KonstantinKondrashov]

Hi @stingdau1206!
I see that this error occurs when SPI_BOOT_CRYPT_CNT is maximum = 0x7 (all 3 bits are set). In this case, this efuse can no longer be burned. Is that your case?
Could you take a look espefuse.py summary? you will be able to see the log like:

SPI_BOOT_CRYPT_CNT (BLOCK0)                        Enables encryption and decryption, when an SPI boo = Enabled R/W (0b111)
                                                   t mode is set. Enabled when 1 or 3 bits are set,di

I will make this error more user friendly.

[stingdau1206]

hi @KonstantinKondrashov
this is summary output cmd:
Detecting chip type... ESP32-C3
espefuse.py v3.3.2-dev

=== Run "summary" command ===
EFUSE_NAME (Block) Description = [Meaningful Value] [Readable/Writeable] (Hex Value)

Config fuses:
DIS_ICACHE (BLOCK0) Disables ICache = False R/W (0b0)
DIS_DOWNLOAD_ICACHE (BLOCK0) Disables Icache when SoC is in Download mode = False R/W (0b0)
DIS_FORCE_DOWNLOAD (BLOCK0) Disables forcing chip into Download mode = False R/W (0b0)
DIS_CAN (BLOCK0) Disables the TWAI Controller hardware = False R/W (0b0)
VDD_SPI_AS_GPIO (BLOCK0) Set this bit to vdd spi pin function as gpio = False R/W (0b0)
BTLC_GPIO_ENABLE (BLOCK0) Enable btlc gpio = 0 R/W (0b00)
POWERGLITCH_EN (BLOCK0) Set this bit to enable power glitch function = False R/W (0b0)
POWER_GLITCH_DSENSE (BLOCK0) Sample delay configuration of power glitch = 0 R/W (0b00)
DIS_DIRECT_BOOT (BLOCK0) Disables direct boot mode = False R/W (0b0)
DIS_USB_SERIAL_JTAG_ROM_PRINT (BLOCK0) Disables USB-Serial-JTAG ROM printing = False R/W (0b0)
UART_PRINT_CONTROL (BLOCK0) Sets the default UART boot message output mode = Enabled R/W (0b00)
FORCE_SEND_RESUME (BLOCK0) Force ROM code to send a resume command during SPI = False R/W (0b0)
bootduring SPI boot
ERR_RST_ENABLE (BLOCK0) Use BLOCK0 to check error record registers = without check R/W (0b0)
BLOCK_USR_DATA (BLOCK3) User data
= 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 R/W

Efuse fuses:
WR_DIS (BLOCK0) Disables programming of individual eFuses = 8388864 R/W (0x00800100)
RD_DIS (BLOCK0) Disables software reading from BLOCK4-10 = 1 R/W (0b0000001)

Flash Config fuses:
FLASH_TPUW (BLOCK0) Configures flash startup delay after SoC power-up, = 0 R/W (0x0)
unit is (ms/2). When the value is 15, delay is 7.
5 ms

Identity fuses:
SECURE_VERSION (BLOCK0) Secure version (used by ESP-IDF anti-rollback feat = 0 R/W (0x0000)
ure)
MAC (BLOCK1) Factory MAC Address
= 10:91:a8:34:c7:d8 (OK) R/W
WAFER_VERSION (BLOCK1) WAFER version = 3 R/W (0b011)
PKG_VERSION (BLOCK1) Package version = ESP32-C3 R/W (0b000)
BLOCK1_VERSION (BLOCK1) BLOCK1 efuse version = 4 R/W (0b100)
OPTIONAL_UNIQUE_ID (BLOCK2) Optional unique 128-bit ID
= 86 6c 1d 3f a4 e1 8a a5 ee 85 9a be 74 3e 79 18 R/W
BLOCK2_VERSION (BLOCK2) Version of BLOCK2 = 5 R/W (0b101)
CUSTOM_MAC (BLOCK3) Custom MAC Address
= 00:00:00:00:00:00 (OK) R/W

Jtag Config fuses:
SOFT_DIS_JTAG (BLOCK0) Software disables JTAG. When software disabled, JT = 0 R/W (0b000)
AG can be activated temporarily by HMAC peripheral
DIS_PAD_JTAG (BLOCK0) Permanently disable JTAG access via pads. USB JTAG = False R/W (0b0)
is controlled separately.

Security fuses:
DIS_DOWNLOAD_MANUAL_ENCRYPT (BLOCK0) Disables flash encryption when in download boot mo = False R/W (0b0)
des
SPI_BOOT_CRYPT_CNT (BLOCK0) Enables encryption and decryption, when an SPI boo = Enable R/W (0b111)
t mode is set. Enabled when 1 or 3 bits are set,di
sabled otherwise
SECURE_BOOT_KEY_REVOKE0 (BLOCK0) If set, revokes use of secure boot key digest 0 = False R/W (0b0)
SECURE_BOOT_KEY_REVOKE1 (BLOCK0) If set, revokes use of secure boot key digest 1 = False R/W (0b0)
SECURE_BOOT_KEY_REVOKE2 (BLOCK0) If set, revokes use of secure boot key digest 2 = False R/W (0b0)
KEY_PURPOSE_0 (BLOCK0) KEY0 purpose = XTS_AES_128_KEY R/- (0x4)
KEY_PURPOSE_1 (BLOCK0) KEY1 purpose = USER R/W (0x0)
KEY_PURPOSE_2 (BLOCK0) KEY2 purpose = USER R/W (0x0)
KEY_PURPOSE_3 (BLOCK0) KEY3 purpose = USER R/W (0x0)
KEY_PURPOSE_4 (BLOCK0) KEY4 purpose = USER R/W (0x0)
KEY_PURPOSE_5 (BLOCK0) KEY5 purpose = USER R/W (0x0)
SECURE_BOOT_EN (BLOCK0) Enables secure boot = False R/W (0b0)
SECURE_BOOT_AGGRESSIVE_REVOKE (BLOCK0) Enables aggressive secure boot key revocation mode = False R/W (0b0)
DIS_DOWNLOAD_MODE (BLOCK0) Disables all Download boot modes = False R/W (0b0)
ENABLE_SECURITY_DOWNLOAD (BLOCK0) Enables secure UART download mode (read/write flas = False R/W (0b0)
h only)
BLOCK_KEY0 (BLOCK4)
Purpose: XTS_AES_128_KEY
Encryption key0 or user data
= ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? -/-
BLOCK_KEY1 (BLOCK5)
Purpose: USER
Encryption key1 or user data
= 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 R/W
BLOCK_KEY2 (BLOCK6)
Purpose: USER
Encryption key2 or user data
= 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 R/W
BLOCK_KEY3 (BLOCK7)
Purpose: USER
Encryption key3 or user data
= 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 R/W
BLOCK_KEY4 (BLOCK8)
Purpose: USER
Encryption key4 or user data
= 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 R/W
BLOCK_KEY5 (BLOCK9)
Purpose: USER
Encryption key5 or user data
= 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 R/W
BLOCK_SYS_DATA2 (BLOCK10) System data (part 2)
= 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 R/W

Spi_Pad_Config fuses:
SPI_PAD_CONFIG_CLK (BLOCK1) SPI CLK pad = 0 R/W (0b000000)
SPI_PAD_CONFIG_Q (BLOCK1) SPI Q (D1) pad = 0 R/W (0b000000)
SPI_PAD_CONFIG_D (BLOCK1) SPI D (D0) pad = 0 R/W (0b000000)
SPI_PAD_CONFIG_CS (BLOCK1) SPI CS pad = 0 R/W (0b000000)
SPI_PAD_CONFIG_HD (BLOCK1) SPI HD (D3) pad = 0 R/W (0b000000)
SPI_PAD_CONFIG_WP (BLOCK1) SPI WP (D2) pad = 0 R/W (0b000000)
SPI_PAD_CONFIG_DQS (BLOCK1) SPI DQS pad = 0 R/W (0b000000)
SPI_PAD_CONFIG_D4 (BLOCK1) SPI D4 pad = 0 R/W (0b000000)
SPI_PAD_CONFIG_D5 (BLOCK1) SPI D5 pad = 0 R/W (0b000000)
SPI_PAD_CONFIG_D6 (BLOCK1) SPI D6 pad = 0 R/W (0b000000)
SPI_PAD_CONFIG_D7 (BLOCK1) SPI D7 pad = 0 R/W (0b000000)

Usb Config fuses:
DIS_USB_JTAG (BLOCK0) Disables USB JTAG. JTAG access via pads is control = False R/W (0b0)
led separately
DIS_USB_DEVICE (BLOCK0) Disables USB DEVICE = False R/W (0b0)
USB_EXCHG_PINS (BLOCK0) Exchanges USB D+ and D- pins = False R/W (0b0)
DIS_USB_SERIAL_JTAG_DOWNLOAD_MODE (BLOCK0) Disables USB-Serial-JTAG download feature in UART = False R/W (0b0)
download boot mode

Wdt Config fuses:
WDT_DELAY_SEL (BLOCK0) Selects RTC WDT timeout threshold at startup = False R/W (0b0)

[stingdau1206]

can't I reset to burn again :(

[KonstantinKondrashov]

FYI, https://docs.espressif.com/projects/esp-idf/en/latest/esp32c3/security/flash-encryption.html#relevant-efuses
SPI_BOOT_CRYPT_CNT is max, so you can not turn off flash encryption back.