Problem after burning efuses
Posted: Thu Aug 20, 2020 1:49 pm
In my project I want to use the efuses in BLK3 for storing a custom MAC address and a serial number. In a first step I burned the custom MAC into BLK3. After this step everything was working as expected.
Next I burned a new serial number into BLK3 bits 192 to 255. After this step I am not able to download a new firmware. I get the following error message:
The efuse summary now is as follows:
SW download to another ESP32 board (without burnt serial number) still works. So, it can not be a general issue but an issue dedicated to the board with burnt serial number only - and the only difference between these boards it the burnt serial number only.
Do you have a hint for me how to solve the problem?
Edit:
I used the following command to burn the fuses:
In a first step I tried to burn the serial number without the option "--force-write-always". But here I received the error message:
That is why I then used the option "--force-write-always" in the next step.
Next I burned a new serial number into BLK3 bits 192 to 255. After this step I am not able to download a new firmware. I get the following error message:
Code: Select all
esptool.py v2.9-dev
Serial port COM5
Connecting....
Chip is ESP32D0WDQ5 (revision 1)
Features: WiFi, BT, Dual Core, 240MHz, VRef calibration in efuse, Coding Scheme None
Crystal is 40MHz
MAC: 24:0a:c4:c0:57:d0
Uploading stub...
Running stub...
Stub running...
Changing baud rate to 921600
Changed.
Configuring flash size...
Compressed 3072 bytes to 151...
Wrote 3072 bytes (151 compressed) at 0x00008000 in 0.0 seconds (effective 1445.6 kbit/s)...
A fatal error occurred: Timed out waiting for packet header
esptool.py failed with exit code 2Code: Select all
EFUSE_NAME Description = [Meaningful Value] [Readable/Writeable] (Hex Value)
----------------------------------------------------------------------------------------
Security fuses:
FLASH_CRYPT_CNT Flash encryption mode counter = 0 R/W (0x0)
UART_DOWNLOAD_DIS Disable UART download mode (ESP32 rev3 only) = 0 R/W (0x0)
FLASH_CRYPT_CONFIG Flash encryption config (key tweak bits) = 0 R/W (0x0)
CONSOLE_DEBUG_DISABLE Disable ROM BASIC interpreter fallback = 1 R/W (0x1)
ABS_DONE_0 secure boot enabled for bootloader = 0 R/W (0x0)
ABS_DONE_1 secure boot abstract 1 locked = 0 R/W (0x0)
JTAG_DISABLE Disable JTAG = 0 R/W (0x0)
DISABLE_DL_ENCRYPT Disable flash encryption in UART bootloader = 0 R/W (0x0)
DISABLE_DL_DECRYPT Disable flash decryption in UART bootloader = 0 R/W (0x0)
DISABLE_DL_CACHE Disable flash cache in UART bootloader = 0 R/W (0x0)
BLK1 Flash encryption key
= 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
BLK2 Secure boot key
= 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
BLK3 Variable Block 3
= 95 0c e8 2f 00 e8 4c 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 00 00 00 39 01 32 3e 71 R/W
Efuse fuses:
WR_DIS Efuse write disable mask = 0 R/W (0x0)
RD_DIS Efuse read disablemask = 0 R/W (0x0)
CODING_SCHEME Efuse variable block length scheme = 0 R/W (0x0)
KEY_STATUS Usage of efuse block 3 (reserved) = 0 R/W (0x0)
Config fuses:
XPD_SDIO_FORCE Ignore MTDI pin (GPIO12) for VDD_SDIO on reset = 1 R/W (0x1)
XPD_SDIO_REG If XPD_SDIO_FORCE, enable VDD_SDIO reg on reset = 1 R/W (0x1)
XPD_SDIO_TIEH If XPD_SDIO_FORCE & XPD_SDIO_REG, 1=3.3V 0=1.8V = 1 R/W (0x1)
CLK8M_FREQ 8MHz clock freq override = 53 R/W (0x35)
SPI_PAD_CONFIG_CLK Override SD_CLK pad (GPIO6/SPICLK) = 0 R/W (0x0)
SPI_PAD_CONFIG_Q Override SD_DATA_0 pad (GPIO7/SPIQ) = 0 R/W (0x0)
SPI_PAD_CONFIG_D Override SD_DATA_1 pad (GPIO8/SPID) = 0 R/W (0x0)
SPI_PAD_CONFIG_HD Override SD_DATA_2 pad (GPIO9/SPIHD) = 0 R/W (0x0)
SPI_PAD_CONFIG_CS0 Override SD_CMD pad (GPIO11/SPICS0) = 0 R/W (0x0)
DISABLE_SDIO_HOST Disable SDIO host = 0 R/W (0x0)
Identity fuses:
MAC Factory MAC Address
= 24:0a:c4:c0:57:d0 (CRC 0xfd OK) R/W
CHIP_VER_REV1 Silicon Revision 1 = 1 R/W (0x1)
CHIP_VER_REV2 Silicon Revision 2 = 0 R/W (0x0)
CHIP_VERSION Reserved for future chip versions = 2 R/W (0x2)
CHIP_PACKAGE Chip package identifier = 1 R/W (0x1)
Calibration fuses:
BLK3_PART_RESERVE BLOCK3 partially served for ADC calibration data = 0 R/W (0x0)
ADC_VREF Voltage reference calibration = 1128 R/W (0x4)
Flash voltage (VDD_SDIO) set to 3.3V by efuse.Do you have a hint for me how to solve the problem?
Edit:
I used the following command to burn the fuses:
Code: Select all
espefuse.py -p COM33 burn_block_data --offset 24 --force-write-always BLK3 serno.binCode: Select all
A fatal error occurred: Efuse block already has values written.