I noticed that the expansion boards for the overo have an onboard eeprom. If
I wanted to create my own custom expansion board, will I need to also
include an EEPROM? What purpose does it serve? Expansion board ID, MAC,
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On 4/15/2011 11:00 AM, dtran11 wrote:
> I noticed that the expansion boards for the overo have an onboard eeprom. If
> I wanted to create my own custom expansion board, will I need to also
> include an EEPROM? What purpose does it serve? Expansion board ID, MAC,
It's used so when the COM boots it can figure out what it is plugged
into (Summit, Palo, etc.) and configure itself accordingly. The MAC
address is stored in the LAN9221 EEPROM (if you include ethernet, I
recommend including that EEPROM), but I imagine you could do a few minor
changes to pull the MAC from any available ROM on the board if you
really wanted to. I included the ID rom on my custom carrier, and now I
get the "Expansion board not found" boot message since it is still
completely unprogrammed, but it doesn't seem to affect anything.
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