Enet Mac address

lpcware — Wed, 15 Jun 2016 18:10:08 GMT

Content originally posted in LPCWare by terrype on Fri Aug 15 23:05:09 MST 2014
Dear Members, do the LPC1769 has unique Enet - Mac address? or we need to apply for one

terry

Re: Enet Mac address

lpcware — Wed, 15 Jun 2016 18:10:09 GMT

Content originally posted in LPCWare by MikeSimmonds on Sat Aug 16 09:20:25 MST 2014
No chip will ever have a pre-programmed MAC address; YOU have to asign one.
[Possibly some development or evaluation boards MAY have a unique MAC address but I think it unlikely.
You would have to see the documentation.]

You cannot 'apply' for a unique MAC address, you have to BUY one. This is expensive because you cannot just buy one!
you have to pay for a manufactures ID (OUID) or a block of 4096 MAC addresses and this is expensive.
See http://standards.ieee.org/regauth/oui/index.shtml
[Currently, about US Dollars 1600 or 550 respectively.]

However, you can buy eeproms from Maxim or MicroChip that have a single MAC address pre-programmed in.
However, you would then have to include that chip on your board design and read the MAC address at startup etc.
This adds a few cents to the normal cost of the eeprom. Note there is no sticker or suchlike, you have to read the
chip electronically. I am not going to go in to that here.

If you just want to mess about with some board, such as the Embedded Arrists 1769 board, I would suggest the following
strategy.

Get hold of a network adapter (or buy the cheapest one you can find). Do not put it in any PC etc.
Use the MAC address from the adapter -- It is unique and because the board is not in use (i.e. laying on a shelf etc.)
will not conflict with such usage in a demo board.

Cheers, Mike.

PS: there are also locally administered MAC addresses (certain bits in the MAC addr indicate this -- google it!) and you would be responsible for ensuring uniqueness in your own environment. These MUST NOT be connected outside your private LAN.
I.e CANNOT be connected to the internet.

Re: Enet Mac address

lpcware — Wed, 15 Jun 2016 18:10:09 GMT

Content originally posted in LPCWare by terrype on Sun Aug 17 16:16:50 MST 2014
Thanks Mike,
" Old programmers never die. They go into infinite recursion." I love the wording

terry

LPC MicrocontrollersのトピックRe: Enet Mac address

Enet Mac address

Re: Enet Mac address

Re: Enet Mac address