APEX ORIN NX II EEPROM Usage#

Functions#

EEPROM is a memory chip used to store MIIVII product information.

Typical uses include:

1 Writing device information 1 Reading device information

APEX ORIN NX EEPROM Test Method:

APEX ORIN NX EEPROM Programming Method

EEPROM Programming I2C Bus Numbers by Product

Product

MIIVII EEPROM Bus Number

Module EEPROM Bus Number

AD10



APEX ORIN NX


APEX DUAL ORIN

Present only on the primary device, on I2C bus i2c-8 at address 0x50

Primary and secondary devices both have EEPROM on I2C bus i2c-0 at address 0x50













EEPROM Test Instructions.docx

EEPROM Test Instructions

  1. The following EEPROM information must be tested:



Item



Length (B)



Example



ASCII



Product Name



64



MIIVIIAPEXXAVIER



4d494956494941504558584156494552



Hardware Version



16



V2.0



56322e30



Device SN



32



ME01321014128



4d453031333231303134313238



Production Date



32



2020-09-29



323032302d30392d3239



Programmed MAC Count



4



2



32



MAC-0



64



00:15:5d:1f:ca:9a



30303a31353a35643a31663a63613a3961



MAC-1



64



00:15:5d:1f:ca:9a



30303a31353a35643a31663a63613a3961



MAC-n



64



00:15:5d:1f:ca:9a



30303a31353a35643a31663a63613a3961



CRC32 Checksum



4



 



crc32(“0~FFFF”)

  1. Test method: run the flash_eeprom script (see attachment)

  1. flash_eeprom provides methods to write/read the product information listed in Section 1.

  1. Detailed procedure:

Attachments#

Note: always use sudo when running the commands.

EEPROM Programming Script — May 9 Update

flash_eeprom

After programming the EEPROM, restart the device and run the following script to check the test results.

eeprom_test.sh

For BRD601 / THOR

BRD601: I2C bus 9

flash_eeprom

You can also find the I2C bus in dmesg:

As shown below

Troubleshooting#

Problems generally have one of two causes: the EEPROM has not been programmed, or the driver is missing.

To distinguish an unprogrammed EEPROM from a missing driver:

Run: sudo dmesg | grep miivii-eeprom

(1) The following output indicates that the EEPROM has not been programmed:

(2) If there is no output, the driver is missing.

Programming the EEPROM with the Production Test Tool:

  1. Confirm the production test tool for the product with Yanxun.

  2. Using the AD10 test tool as an example, click the MIIVII configuration entry and configure the Ethernet IP address of the device under test. Save the configuration and restart the test tool. After the tool shows that the device connection is established, enter the motherboard serial number in the PCBA field to prepare for programming.

  3. In the production platform selector at the upper right, select the Product + WiFi option. Click start below to begin testing. A check mark in the EEPROM programming row indicates that programming is complete. Restart the device under test.

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