Hi,
On Wed, 18 Mar 2015 09:12:47 +0100, Henrik Nordström
<[email protected]> wrote:
> ons 2015-03-18 klockan 08:55 +0100 skrev Olliver Schinagl:
> > I'm all for common methods, but you are suggesting to use a single
> > dedicated page purely for the MAC address? Where is it defined which
> > page that is? And what about using the subsequent page for stuff like a
> > crc/checksum and verify the mac against that? It would yield in an easy
> > way to verify if there is actually a MAC stored there or not.
>
> What I am saying is that unless you are doing a very high volume then
> the most practical approach to get a real MAC is to buy them as
> preprogrammed eeproms, for example Microchip 24AA02E48. There is no
> checksum what so ever in these devices, only the MAC at a predefined
> location (write protected). There is also some small amount of
> unprotected space for custom data if needed (can often be protected
> after programming).
Yes, this is exactly our case.
We have LIME with additional board with Microchip MCP79401. This is
RTC+EEPROM with preprogrammed (and somehow protected) MAC. That particular
EEPROM has only 64-bits without any checksum. I just trust that the MAC is
stored in I2C EEPROM at address X in a register Y.
Best regards,
Tomas
> Regards
> Henrik
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