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Table of Contents

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Argument

Description

i2c_bus

The I2C bus number.

eeprom_address

The EEPROM address (hex or decimal).

--yes
-y
--force

Automatically confirms the operation (skips user confirmation).

<key> <value>

One or more key-value pairs to write to EEPROM.

Anchor
TLV_EXAMPLE_USAGE_ANCH
TLV_EXAMPLE_USAGE_ANCH
Example Usage

For example if we want the following data to appear in DMI:

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Panel
panelIconIdatlassian-info
panelIcon:info:
bgColor#FFFFFF

eeprom example for this :

Code Block
python3 TLVwriter.py 3 0x50 TLV_CODE_SYS_NAME "EmbeddedDevice" TLV_CODE_SYS_SKU "ED-2024" TLV_CODE_SYS_SERIAL_NUMBER "SN123456789" TLV_CODE_SYS_VERSION "1.2.3" TLV_CODE_FAMILY "Industrial" TLV_CODE_MANUF_NAME "TechCorp" TLV_CODE_MANUF_DATE "2024-03-11" TLV_CODE_PLATFORM_NAME "ARM Cortex-A72"

00: 54 6c 76 49 6e 66 6f 00 01 65 0030 0e 45 6d 62 TlvInfo.?e.0?Emb
10: 65 64 64 65 64 44 65 76 69 63 65 3107 45 44 2d eddedDevice1?ED-
20: 32 30 32 34 32 0b 53 4e 31 32 33 34 35 36 37 38 20242?SN12345678
30: 39 33 05 31 2e 32 2e 33 20 0a 49 6e 64 75 73 74 93?1.2.3?Indust
40: 72 69 61 6c 25 09 73 6f 6c 69 64 2d 72 75 6e 23 rial%.solid-run#
50: 0a 32 30 32 34 2d 30 33 2d 31 31 24 0b 42 65 64 .2024-03-11$.Bed
60: 72 6f 63 6b 2d 49 50 43 fe 04 6e 7e c0 fd 00 00 rock-IPC??n~??
70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
80: ……

header

version

Total Payload Length (little endian)

Type

Length

Value

crc checksum

Anchor
TLV_FIND_I2CBUS_ANCH
TLV_FIND_I2CBUS_ANCH

Info

Finding the I2C Bus Number

To determine the correct I2C bus number, run the following command:

Code Block
sudo i2cdetect -y 1

If no EEPROM device is found, repeat the command with different bus numbers (e.g., 2, 3, 4, etc.) until you detect an address 0x50 or 0x56. Once found, use the corresponding bus number in the script.

Example:

Code Block
sudo i2cdetect -y 2

If the output shows:

Code Block
     0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F
00:          -- -- -- -- -- -- -- -- -- -- -- -- -- 
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
50: 50 -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

Then bus 2 and address 0x50 should be used in the script.

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Anchor
TLV_KEYS_ANCH
TLV_KEYS_ANCH
Supported TLV Keys

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