Problem reading MAC address - Beacon EmbeddedWorks

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Last Post 03 Feb 2012 10:53 AM by jsarao

Problem reading MAC address

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jsarao

New Member
Posts:29

01 Feb 2012 02:50 PM
LoLo version 2.5.0 SOM Model: SOMDM3730-20-2780AGCR-A Using the SOM with our own carrier, which has no EEPROM (U22 AT93C46-10TU-1.8 on the TORPEDO LAUNCHER 2 BASEBOARD PN 1020170) ifmac command fails losh> ifmac sm0 0x00:0x02:0x04:0x08:0xaa:0xbb readEEPROMmac: eth buffer empty??? error: ifmac: failed to write () error: ifmac: failed to write QUESTION: How can I configure the LoLo to not try to read from the EEPROM? QUESTION: How can I configure the LoLo to use a MAC that I assign? I have seen with LoLo 2.4.x there is a "config" command that doesn't seem to be available on 2.5. Any help is appreciated.

richard.laborde@logicpd.com

Basic Member
Posts:247

01 Feb 2012 03:55 PM
j - did you do ifconfig sm0 first? This does work on your kit, correct? *************************************************************** LogicLoader (c) Copyright 2002-2011, Logic PD, Inc. All Rights Reserved. LoLo Version: 2.5.0 SOM Model Number: SOMDM3730-20-2780AGCR-2 SOM Part Number: XXXXX SOM Serial Number: XXXXX *************************************************************** losh> ifconfig sm0 dhcp Waiting for link to come up... up Starting DHCP on sm0 . losh> ifmac sm0 Current MAC Address: 00:08:ee:05:21:7a losh>

jsarao

New Member
Posts:29

01 Feb 2012 04:04 PM
losh> ifconfig sm0 up readEEPROMmac: eth buffer empty??? resetMAC91C117: readEEPROMmac returns -7 MAC EEPROM not programmed! Programming to default address. Please reset the baord for this new default MAC to take effect. [js. This make sense because my custom carrier has no eeprom hooked to the LAN9 chip] ... I power cycle the board ... losh> ifconfig sm0 dhcp Waiting for link to come up... up Starting DHCP on sm0.......... error: ifconfig: unable to get ip address; still trying (sm0) [js. This makes since because the default MAC is FF:FF:FF:FF:FF:FF] losh> ifconfig sm0: up 100M full-duplex (25) sm0: mac: ff:ff:ff:ff:ff:ff ip: 0.0.0.0 mask: 0.0.0.0 gw: 0.0.0.0 I would like a way to manually override the MAC to some other address. This should allow the ifconfig sm0 dhcp command to succeed.

richard.laborde@logicpd.com

Basic Member
Posts:247

02 Feb 2012 02:31 PM
I'm checking internally, but the first reply from my LoLo guru said he doesn't know of a way to make the LAN chip work without the EERPOM connected to it. Thanks

jsarao

New Member
Posts:29

02 Feb 2012 04:04 PM
Great. thanks for checking. Otherwise, is the LoLo source available? I know the u-boot source is and we should be able to push an address to the LAN chip register... presumably.

richard.laborde@logicpd.com

Basic Member
Posts:247

03 Feb 2012 08:19 AM
Generally speaking the LoLo source is not available, and when the guy that wrote it tells me it won't work, I listen to him. Ask Matt to look into it for you. Thanks

jsarao

New Member
Posts:29

03 Feb 2012 10:53 AM
Posted By richardl on 3 Feb 2012 8:19 AM Generally speaking the LoLo source is not available, and when the guy that wrote it tells me it won''t work, I listen to him. Ask Matt to look into it for you. Thanks Thanks for checking. I will talk to Matt to see what we can do. FYI: from the LAN9221 documentation. The LAN9221/LAN9221i can optionallyload its MAC address from an external serial EEPROM. ... If a properly configured EEPROM is not detected, it is the responsibility of the host LAN Driver to set the IEEE addresses.