We are using CTI’s Forge Carrier board + AGX Orin 32GB and we are seeing the “Parsing board information failed” error after running the flash script. Here are the log messages from both the host and device side:
Device side:
labuser@lab-desktop-19:~$ sudo picocom -b 115200 /dev/ttyUSB0
picocom v3.1
port is : /dev/ttyUSB0
flowcontrol : none
baudrate is : 115200
parity is : none
databits are : 8
stopbits are : 1
escape is : C-a
local echo is : no
noinit is : no
noreset is : no
hangup is : no
nolock is : no
send_cmd is : sz -vv
receive_cmd is : rz -vv -E
imap is :
omap is :
emap is : crcrlf,delbs,
logfile is : none
initstring : none
exit_after is : not set
exit is : no
Type [C-a] [C-h] to see available commands
Terminal ready
��
[0109.806] I> MB1 (version: 0.28.0.0-t234-54845784-ec016368)
[0109.812] I> t234-A01-0-Silicon (0x12347) Prod
[0109.816] I> Boot-mode : BPMP Diagnostic
[0109.820] I> Emulation:
[0109.822] I> Entry timestamp: 0x00000000
[0109.826] I> last_boot_error: 0x0
[0109.829] I> BR-BCT: preprod_dev_sign: 0
[0109.833] I> rst_source: 0xb, rst_level: 0x1
[0109.837] I> Task: Initialize MB2 params (0x5000d78d)
[0109.842] I> MB2-params @ 0x40060000
[0109.846] I> Task: Crypto init (0x5001cb8d)
[0109.850] I> Task: Secure debug controls (0x5000cd21)
[0109.855] I> Task: strap war set (0x5000c70d)
[0109.859] I> strap value(0x4000401) set to 0x4000401
[0109.864] I> Task: Program NV master stream id (0x5000ccd5)
[0109.869] I> Task: Verify boot mode (0xd482021)
[0109.875] I> Task: Alias fuses (0x500109cd)
[0109.880] W> FUSE_ALIAS: Fuse alias on production fused part is not supported.
[0109.887] I> Task: Print SKU type (0x5000fee1)
[0109.891] I> FUSE_OPT_CCPLEX_CLUSTER_DISABLE = 0x000001c0
[0109.897] I> FUSE_OPT_GPC_DISABLE = 0x00000000
[0109.901] I> FUSE_OPT_TPC_DISABLE = 0x00000008
[0109.905] I> FUSE_OPT_DLA_DISABLE = 0x00000000
[0109.909] I> FUSE_OPT_EMC_DISABLE = 0x00000000
[0109.914] I> FUSE_BOOTROM_PATCH_VERSION = 0x7
[0109.918] I> FUSE_PSCROM_PATCH_VERSION = 0x7
[0109.922] I> FUSE_OPT_ADC_CAL_FUSE_REV = 0x2
[0109.926] I> FUSE_SKU_INFO_0 = 0xd2
[0109.929] I> FUSE_OPT_SAMPLE_TYPE_0 = 0x3 PS
[0109.934] I> FUSE_PACKAGE_INFO_0 = 0x2
[0109.937] I> SKU: Prod
[0109.939] I> Task: Boost clocks (0x5001462d)
[0109.944] I> Initializing PLLC2 for AXI_CBB.
[0109.948] I> AXI_CBB : src = 35, divisor = 0
[0109.952] I> Task: Voltage monitor (0x50014639)
[0109.956] I> VMON: Vmon re-calibration and fine tuning done
[0109.962] I> Task: UPHY init (0x5000dced)
[0109.966] W> UPHY: UPHY lane info table is empty in MB1 BCT.
[0109.971] I> Task: Boot device init (0x50000b39)
[0109.976] I> Boot_device: RCM
[0109.979] I> USB configuration success
[0109.982] I> Task: TSC init (0x5001fa6d)
[0109.986] I> Task: Enable WDT 5th expiry (0x50020699)
[0109.991] I> Task: I2C register (0x50000ad9)
[0109.995] I> Task: Reset FSI (0x50014635)
[0109.999] I> Task: Enable clock-mon (0x5001fa5d)
[0110.015] I> FMON: Fmon re-programming done
[0110.019] I> Task: MB1 fixed firewalls (0x5001f0d9)
[0110.028] I> Task: Load MB2/Applet/FSKP (0x5000d691)
[0110.032] I> Loading MB2 Applet
[0110.035] I> Active chain: 0
[0110.038] I> Slot: 0
[0110.040] I> Binary[21] block-0 (partition size: 0x50000)
[0110.045] I> get_binary_info: Binary name: MB2-Applet
[0110.050] I> Size of crypto header is 8192
[0110.054] I> BCH load address is : 0x4004e000
[0110.058] I> Size of crypto header is 8192
[0110.063] I> BCH of MB2-Applet read from storage
[0110.067] I> BCH address is : 0x4004e000
[0110.071] I> MB2-Applet header integrity check is success
[0110.076] I> Binary magic in BCH component 0 is MB2A
[0110.081] I> component binary type is 21
[0110.085] I> Size of crypto header is 8192
[0110.096] I> MB2-Applet binary is read from storage
[0110.102] I> MB2-Applet binary integrity check is success
[0110.107] I> Binary MB2-Applet loaded successfully at 0x40000000 (0x41b40)
[0110.114] I> Task: Map CCPLEX SHARED carveout (0x5000d835)
[0110.119] I> Task: Prepare MB2 params (0x5000d8f1)
[0110.124] I> BR-BCT Boot Chain Fields
[0110.128] I> u32_non_gpio_select_boot_chain : 0
[0110.132] I> u32_num_boot_chains : 0
[0110.137] I> bf_bl_gpio_select_boot_chain_1b : 0
[0110.141] I> Task: Misc NV security settings (0x5000d0f9)
[0110.147] I> NVDEC sticky bits programming done
[0110.151] I> Successfully powergated NVDEC
[0110.155] I> Task: Disable/Reload WDT (0x500206e1)
[0110.160] I> Programmed SLCG global override := 0x0
[0110.165] I> MB1: MSS reconfig completed
I> Applet (version: 0.0.0.0-t234-54845784-80607037)
I> t234-A01-0-Silicon (0x12347)
I> Emulation:
I> Entry timestamp: 0xffffffff
I> Task: Pinmux init (0x4000062d)
I> Task: Boot device init (0x400012e5)
I> Applet do storage init
I> Boot_device: QSPI_FLASH instance: 0
I> Qspi clock source : clk_m
I> QSPI-0l initialized successfully
I> sdmmc DDR50 mode
I> sdmmc bdev is already initialized
E> Unknown device 7
E> Unknown device 8
I> Task: Partition Manager Init (0x40002d25)
I> Found 57 partitions in QSPI_FLASH (instance 0)
W> Cannot find any partition table for 00000003
> PARTITION_MANAGER: Failed to publish partition.
I> Found 14 partitions in SDMMC_USER (instance 3)
I> Task: I2C register (0x400006a5)
I> Task: Register exit handlers (0x400005f5)
I> Task: Enter 3p server (0x400018e9)
I> USB configuration success
I> Populate chip info
I> RAM_CODE 0x4000401
I> Populate eeprom info
I> Populate eeprom info for module cvm
I> dump bct
I> Rebooting : reboot-recovery
Host side:
# L4T BSP Information:
# R35 , REVISION: 2.1
# User release: 0.0
###############################################################################
# Target Board Information:
# Name: cti-orin-agx-agx201-09, Board Family: t186ref, SoC: Tegra 234,
# OpMode: production, Boot Authentication: NS,
# Disk encryption: disabled ,
###############################################################################
copying emc_fuse_dev_params(/home/labuser/flashing/images/june-29-2023/L4T_35.2.1/Linux_for_Tegra/bootloader/t186ref/BCT/tegra234-br-bct-diag-boot.dts)... done.
copying device_config(/home/labuser/flashing/images/june-29-2023/L4T_35.2.1/Linux_for_Tegra/bootloader/t186ref/BCT/tegra234-mb1-bct-device-p3701-0000.dts)... done.
copying misc_config(/home/labuser/flashing/images/june-29-2023/L4T_35.2.1/Linux_for_Tegra/bootloader/t186ref/BCT/tegra234-mb1-bct-misc-p3701-0000.dts)... done.
./tegraflash.py --chip 0x23 --applet "/home/labuser/flashing/images/june-29-2023/L4T_35.2.1/Linux_for_Tegra/bootloader/mb1_t234_prod.bin" --skipuid --cfg readinfo_t234_min_prod.xml --dev_params tegra234-br-bct-diag-boot.dts --device_config tegra234-mb1-bct-device-p3701-0000.dts --misc_config tegra234-mb1-bct-misc-p3701-0000.dts --bins "mb2_applet applet_t234.bin" --cmd "dump eeprom cvm cvm.bin; dump custinfo custinfo_out.bin; reboot recovery"
Welcome to Tegra Flash
version 1.0.0
Type ? or help for help and q or quit to exit
Use ! to execute system commands
[ 0.0121 ] tegrarcm_v2 --chip 0x23 0 --ismb2applet
[ 0.0125 ] File rcm_state open failed
[ 0.0127 ] ERROR: failed to read rcm_state
[ 0.0127 ]
[ 0.0152 ] tegrasign_v3.py --key None --getmode mode.txt
[ 0.0154 ] Assuming zero filled SBK key
[ 0.0129 ] Pre-processing config: tegra234-mb1-bct-device-p3701-0000.dts
[ 0.0195 ] Pre-processing config: tegra234-mb1-bct-misc-p3701-0000.dts
[ 0.0282 ] Parsing partition layout
[ 0.0286 ] tegraparser_v2 --pt readinfo_t234_min_prod.xml.tmp
[ 0.0298 ] Kernel DTB used: None
[ 0.0298 ] WARNING: dce base dtb is not provided
[ 0.0298 ] Parsing partition layout
[ 0.0301 ] tegraparser_v2 --pt readinfo_t234_min_prod.xml.tmp
[ 0.0307 ] Creating list of images to be signed
[ 0.0310 ] tegrahost_v2 --chip 0x23 0 --partitionlayout readinfo_t234_min_prod.xml.bin --list images_list.xml zerosbk
[ 0.0313 ] MB1: Nvheader already present is mb1_t234_prod_aligned.bin
[ 0.0324 ] Header already present for mb1_t234_prod_aligned_sigheader.bin
[ 0.0327 ] MB1: Nvheader already present is mb1_t234_prod_aligned.bin
[ 0.0370 ] Header already present for mb1_t234_prod_aligned_sigheader.bin
[ 0.0374 ] MB1: Nvheader already present is psc_bl1_t234_prod_aligned.bin
[ 0.0413 ] Header already present for psc_bl1_t234_prod_aligned_sigheader.bin
[ 0.0416 ] adding BCH for mb2_t234_aligned.bin
[ 0.0440 ] MB1: Nvheader already present is psc_bl1_t234_prod_aligned.bin
[ 0.0548 ] Header already present for psc_bl1_t234_prod_aligned_sigheader.bin
[ 0.0550 ] adding BCH for mb2_t234_aligned.bin
[ 0.0677 ] Filling MB1 storage info
[ 0.0677 ] Parsing dev params for multi chains
[ 0.0733 ] Generating br-bct
[ 0.0736 ] Updating dev and MSS params in BR BCT
[ 0.0736 ] tegrabct_v2 --dev_param tegra234-br-bct-diag-boot_cpp.dtb --brbct br_bct.cfg --chip 0x23 0
[ 0.0742 ] Updating bl info
[ 0.0745 ] tegrabct_v2 --brbct br_bct_BR.bct --chip 0x23 0 --updateblinfo readinfo_t234_min_prod.xml.bin
[ 0.0748 ] WARNING: boot chain is not completed. set to 0
[ 0.0755 ] Generating signatures
[ 0.0781 ] tegrasign_v3.py --key None --list images_list.xml --pubkeyhash pub_key.key --sha sha512
[ 0.0782 ] Assuming zero filled SBK key
[ 0.0860 ] Warning: pub_key.key is not found
[ 0.0836 ] Parsing dev params for multi chains
[ 0.0836 ] Generating br-bct
[ 0.0839 ] Updating dev and MSS params in BR BCT
[ 0.0839 ] tegrabct_v2 --dev_param tegra234-br-bct-diag-boot_cpp.dtb --brbct br_bct.cfg --chip 0x23 0
[ 0.0844 ] Updating bl info
[ 0.0847 ] tegrabct_v2 --brbct br_bct_BR.bct --chip 0x23 0 --updateblinfo readinfo_t234_min_prod.xml.bin --updatesig images_list_signed.xml
[ 0.0849 ] WARNING: boot chain is not completed. set to 0
[ 0.0857 ] Get Signed section of bct
[ 0.0860 ] tegrabct_v2 --brbct br_bct_BR.bct --chip 0x23 0 --listbct bct_list.xml
[ 0.0864 ] Signing BCT
[ 0.0890 ] tegrasign_v3.py --key None --list bct_list.xml --pubkeyhash pub_key.key --sha sha512
[ 0.0891 ] Assuming zero filled SBK key
[ 0.0904 ] Sha saved in br_bct_BR.sha
[ 0.0906 ] Warning: pub_key.key is not found
[ 0.0880 ] Updating BCT with signature
[ 0.0883 ] tegrabct_v2 --brbct br_bct_BR.bct --chip 0x23 0 --updatesig bct_list_signed.xml
[ 0.0885 ] Offset :4608 Len :3584
[ 0.0889 ] Generating SHA2 Hash
[ 0.0915 ] tegrasign_v3.py --key None --list bct_list.xml --sha sha512
[ 0.0915 ] Assuming zero filled SBK key
[ 0.0915 ] Assuming zero filled SBK key
[ 0.0930 ] Sha saved in br_bct_BR.sha
[ 0.0906 ] Updating BCT with SHA2 Hash
[ 0.0909 ] tegrabct_v2 --brbct br_bct_BR.bct --chip 0x23 0 --updatesha bct_list_signed.xml
[ 0.0911 ] Offset :4608 Len :3584
[ 0.0914 ] Offset :68 Len :8124
[ 0.0916 ] Generating coldboot mb1-bct
[ 0.0919 ] tegrabct_v2 --chip 0x23 0 --mb1bct mb1_cold_boot_bct.cfg --misc tegra234-mb1-bct-misc-p3701-0000_cpp.dtb --device tegra234-mb1-bct-device-p3701-0000_cpp.dtb
[ 0.0922 ] MB1-BCT version: 0.9
[ 0.0924 ] ERROR: carveout /misc/carveout/aux_info@CARVEOUT_UNUSED5/ is not supported
[ 0.0927 ] ERROR: carveout /misc/carveout/aux_info@CARVEOUT_UNUSED5/ is not supported
[ 0.0929 ] ERROR: carveout /misc/carveout/aux_info@CARVEOUT_UNUSED5/ is not supported
[ 0.0931 ] ERROR: carveout /misc/carveout/aux_info@CARVEOUT_MCE_COVERAGE/ is not supported
[ 0.0933 ] ERROR: carveout /misc/carveout/aux_info@CARVEOUT_MCE_COVERAGE/ is not supported
[ 0.0935 ] ERROR: carveout /misc/carveout/aux_info@CARVEOUT_MCE_COVERAGE/ is not supported
[ 0.0940 ] Parsing config file :tegra234-mb1-bct-device-p3701-0000_cpp.dtb
[ 0.0941 ] Added Platform Config 9 data with size :- 100
[ 0.0941 ]
[ 0.0941 ] Updating mb1-bct with firmware information
[ 0.0944 ] tegrabct_v2 --chip 0x23 0 --mb1bct mb1_cold_boot_bct_MB1.bct --updatefwinfo readinfo_t234_min_prod.xml.bin
[ 0.0954 ] tegrahost_v2 --chip 0x23 0 --align mb1_cold_boot_bct_MB1_aligned.bct
[ 0.0961 ] tegrahost_v2 --chip 0x23 0 --magicid MBCT --appendsigheader mb1_cold_boot_bct_MB1_aligned.bct zerosbk
[ 0.0963 ] adding BCH for mb1_cold_boot_bct_MB1_aligned.bct
[ 0.0994 ] tegrasign_v3.py --key None --list mb1_cold_boot_bct_MB1_aligned_sigheader.bct_list.xml --pubkeyhash pub_key.key --sha sha512
[ 0.0995 ] Assuming zero filled SBK key
[ 0.1005 ] Warning: pub_key.key is not found
[ 0.0983 ] tegrahost_v2 --chip 0x23 0 --updatesigheader mb1_cold_boot_bct_MB1_aligned_sigheader.bct.encrypt mb1_cold_boot_bct_MB1_aligned_sigheader.bct.hash zerosbk
[ 0.0990 ] Generating recovery mb1-bct
[ 0.0993 ] tegrabct_v2 --chip 0x23 0 --mb1bct mb1_bct.cfg --misc tegra234-mb1-bct-misc-p3701-0000_cpp.dtb --device tegra234-mb1-bct-device-p3701-0000_cpp.dtb
[ 0.0996 ] MB1-BCT version: 0.9
[ 0.0998 ] ERROR: carveout /misc/carveout/aux_info@CARVEOUT_UNUSED5/ is not supported
[ 0.1000 ] ERROR: carveout /misc/carveout/aux_info@CARVEOUT_UNUSED5/ is not supported
[ 0.1002 ] ERROR: carveout /misc/carveout/aux_info@CARVEOUT_UNUSED5/ is not supported
[ 0.1004 ] ERROR: carveout /misc/carveout/aux_info@CARVEOUT_MCE_COVERAGE/ is not supported
[ 0.1006 ] ERROR: carveout /misc/carveout/aux_info@CARVEOUT_MCE_COVERAGE/ is not supported
[ 0.1008 ] ERROR: carveout /misc/carveout/aux_info@CARVEOUT_MCE_COVERAGE/ is not supported
[ 0.1009 ]
[ 0.1009 ] Parsing config file :tegra234-mb1-bct-device-p3701-0000_cpp.dtb
[ 0.1009 ] Added Platform Config 9 data with size :- 100
[ 0.1009 ]
[ 0.1009 ] Updating mb1-bct with firmware information
[ 0.1011 ] tegrabct_v2 --chip 0x23 0 --mb1bct mb1_bct_MB1.bct --recov --updatefwinfo readinfo_t234_min_prod.xml.bin
[ 0.1021 ] tegrahost_v2 --chip 0x23 0 --align mb1_bct_MB1_aligned.bct
[ 0.1027 ] tegrahost_v2 --chip 0x23 0 --magicid MBCT --appendsigheader mb1_bct_MB1_aligned.bct zerosbk
[ 0.1029 ] adding BCH for mb1_bct_MB1_aligned.bct
[ 0.1060 ] tegrasign_v3.py --key None --list mb1_bct_MB1_aligned_sigheader.bct_list.xml --pubkeyhash pub_key.key --sha sha512
[ 0.1061 ] Assuming zero filled SBK key
[ 0.1069 ] Warning: pub_key.key is not found
[ 0.1047 ] tegrahost_v2 --chip 0x23 0 --updatesigheader mb1_bct_MB1_aligned_sigheader.bct.encrypt mb1_bct_MB1_aligned_sigheader.bct.hash zerosbk
[ 0.1054 ] Error: Skip generating mem_bct because sdram_config is not defined
[ 0.1054 ] Error: Skip generating mem_bct because sdram_config is not defined
[ 0.1054 ] Copying signatures
[ 0.1056 ] tegrahost_v2 --chip 0x23 0 --partitionlayout readinfo_t234_min_prod.xml.bin --updatesig images_list_signed.xml
[ 0.1100 ] mb1_t234_prod_aligned_sigheader.bin.encrypt filename is from images_list
[ 0.1101 ] psc_bl1_t234_prod_aligned_sigheader.bin.encrypt filename is from images_list
[ 0.1101 ] Boot Rom communication
[ 0.1104 ] tegrarcm_v2 --new_session --chip 0x23 0 --uid --download bct_br br_bct_BR.bct --download mb1 mb1_t234_prod_aligned_sigheader.bin.encrypt --download psc_bl1 psc_bl1_t234_prod_aligned_sigheader.bin.encrypt --download bct_mb1 mb1_bct_MB1_sigheader.bct.encrypt
[ 0.1107 ] BR_CID: 0x80012344705DD3DF0800000017038140
[ 0.1390 ] Sending bct_br
[ 0.1868 ] Sending mb1
[ 0.1878 ] Sending psc_bl1
[ 0.1985 ] Sending bct_mb1
[ 0.2045 ] Boot Rom communication completed
[ 0.2064 ] tegrahost_v2 --chip 0x23 0 --align applet_t234_aligned.bin
[ 0.2085 ] tegrahost_v2 --chip 0x23 0 --magicid MB2A --appendsigheader applet_t234_aligned.bin zerosbk
[ 0.2093 ] adding BCH for applet_t234_aligned.bin
[ 0.2338 ] tegrasign_v3.py --key None --list applet_t234_aligned_sigheader.bin_list.xml --pubkeyhash pub_key.key --sha sha512
[ 0.2342 ] Assuming zero filled SBK key
[ 0.2386 ] Warning: pub_key.key is not found
[ 0.2371 ] tegrahost_v2 --chip 0x23 0 --updatesigheader applet_t234_aligned_sigheader.bin.encrypt applet_t234_aligned_sigheader.bin.hash zerosbk
[ 0.2404 ] Sending mb2_applet...
[ 0.2412 ] tegrarcm_v2 --chip 0x23 0 --pollbl --download applet applet_t234_sigheader.bin.encrypt
[ 0.2419 ] BL: version 0.28.0.0-t234-54845784-ec016368 last_boot_error: 0
[ 0.4006 ] Sending applet
[ 0.5148 ] completed
[ 0.5157 ] tegrarcm_v2 --chip 0x23 0 --ismb2applet
[ 0.5165 ] MB2 Applet version 01.00.0000
[ 0.7022 ] tegrarcm_v2 --chip 0x23 0 --ismb2applet
[ 0.7031 ] MB2 Applet version 01.00.0000
[ 0.7339 ] Retrieving board information
[ 0.7347 ] tegrarcm_v2 --chip 0x23 0 --oem platformdetails chip chip_info.bin
[ 0.7357 ] MB2 Applet version 01.00.0000
[ 0.7814 ] Saved platform info in chip_info.bin
[ 0.7869 ] Chip minor revision: 1
[ 0.7871 ] Bootrom revision: 0x7
[ 0.7873 ] Ram code: 0x0
[ 0.7874 ] Chip sku: 0xd2
[ 0.7877 ] Chip Sample: prod
[ 0.7877 ]
[ 0.7881 ] Retrieving EEPROM data
[ 0.7882 ] tegrarcm_v2 --oem platformdetails eeprom cvm /home/labuser/flashing/images/june-29-2023/L4T_35.2.1/Linux_for_Tegra/bootloader/cvm.bin --chip 0x23 0
[ 0.7892 ] MB2 Applet version 01.00.0000
[ 0.8371 ] Saved platform info in /home/labuser/flashing/images/june-29-2023/L4T_35.2.1/Linux_for_Tegra/bootloader/cvm.bin
[ 0.8710 ] tegrarcm_v2 --chip 0x23 0 --ismb2applet
[ 0.8717 ] MB2 Applet version 01.00.0000
[ 0.9021 ] tegrarcm_v2 --chip 0x23 0 --ismb2applet
[ 0.9028 ] MB2 Applet version 01.00.0000
[ 0.9531 ] Dumping customer Info
[ 0.9537 ] tegrarcm_v2 --chip 0x23 0 --oem dump bct tmp.bct
[ 0.9540 ] MB2 Applet version 01.00.0000
[ 1.0018 ] Saved bct in tmp.bct
[ 1.0105 ] tegrabct_v2 --brbct tmp.bct --chip 0x23 0 --custinfo /home/labuser/flashing/images/june-29-2023/L4T_35.2.1/Linux_for_Tegra/bootloader/custinfo_out.bin
[ 1.0114 ] Custome[ 1.0121 ] r data saved in /home/labuser/flashing/images/june-29-2023/L4T_35.2.1/Linux_for_Tegra/bootloader/custinfo_out.bin successfully
[ 1.0122 ] Rebooting to recovery mode
[ 1.0131 ] tegrarcm_v2 --chip 0x23 0 --ismb2
[ 1.0462 ] tegrarcm_v2 --chip 0x23 0 --ismb2applet
[ 1.0470 ] MB2 Applet version 01.00.0000
[ 1.0932 ] Booting to recovery mode
[ 1.0936 ] tegrarcm_v2 --chip 0x23 0 --reboot recovery
[ 1.0938 ] MB2 Applet version 01.00.0000
Parsing board information failed.
We also wrote a script (see below) to calculate and compare the CRC to make sure it’s not an issue related to the EEPROM getting overwritten and we see this “Parsing board information failed” error message on units with the same CRC (i.e. confirmed that the EEPROM isn’t getting overwritten).
import subprocess
def AddToCRC(b, crc):
b2 = b
if (b < 0):
b2 = b + 256
for i in range(8):
odd = ((b2^crc) & 1) == 1
crc >>= 1
b2 >>= 1
if (odd):
crc ^= 0x8C # This means crc ^= 140.
return crc
def read_eeprom():
crc = 0
for i in range(255):
cmd = f"sudo i2cget -y 0 0x50 {i}"
result = subprocess.getoutput(cmd)
crc = AddToCRC(int(result, 16), crc)
# print("Calculated CRC: ", hex(crc))
cmd = f"sudo i2cget -y 0 0x50 255"
eeprom_crc = subprocess.getoutput(cmd)
if eeprom_crc == hex(crc):
print(f"Calculated CRC same as EEPROM: {eeprom_crc}")
else:
print("Fail! calculated crc and eeprom crc do not match!!")
print(f"Written crc: {eeprom_crc} Calculated: {hex(crc)}")
#print("Current CRC: ", eeprom_crc)
if __name__ == "__main__":
read_eeprom()
Could someone please help us resolve this issue?
