• State Resolved
  • Locked Locked
  • Replies 4 replies
  • Subscribers 98 subscribers
  • Views 517 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Ethernet not working when installed in AMC slot

Matthew Jones1
Prodigy 60 points
Other Parts Discussed in Thread: TMS320C6678

I have a TI TMS320C6678 EVM Board rev 3a which boots just fine using I2C/TFTP over Ethernet or using I2C/NAND after which it successfully gets an IP address using DHCP.  However, when it is installed in an AMC slot in a MicroTCA chassis it seems that the Ethernet interface just doesn't work at all.  I don't see any broadcast packets on the network connected to the front RJ45 connector (MAC1), nor do I see any broadcast packets from MAC0 on the network managed by the switch on the microTCA backplane.  I2C/NAND boot still works except that DHCP never gets an address and I can't bring up eth0 manually once the DHCP attempts time out.  What I don't understand is what is different when the EVM is installed in the microTCA chassis and why it would affect the MAC1 ethernet interface.  Does it use a clock source from the backplane that is not configured correctly in this case?  Does the IBL need to be modified in some way to handle this configuration?  I've seen some questions that may be related to similar problems but found no definitive solution.

Any suggestions would be most helpful.

Thanks

  • 0
    TI__Mastermind 46460 points

    Matthew,

    I do not understand why this is not working.  This has been validated by other customers for many months.  There are other e2e threads on various MTCA integration issues but Ethernet has not been problematic.  The clocks used for this are all local and do not need any clocks from the AMC connector.  Does your system supply signals on any of the TELECOM Clock channels?

    Tom

     

  • 0 in reply to Tom Johnson 16214
    Prodigy 60 points

    This is good information may help to point things in the right direction.  For one, the AMC has not yet been plugged directly into the chassis, but instead is in an extender module.  That way I didn't have to disassemble the fan, but it may be introducing additional complication.  I have 100MHz on FCLKA.  I will work on installing the AMC directly in my chassis to help narrow down the problem and let you know what I find.

    Thanks,

    Matthew.

  • 0 in reply to Matthew Jones1
    Prodigy 60 points

    This is good... After removing all the extra hardware and inserting the AMC directly in the MicroTCA chassis, without using the extender card, the module successfully booted from Ethernet with the cable plugged in the front.  So this suggests that the whole problem was with the extender card I was using.  As far as I am concerned, this particular problem is resolved now.

    Thanks,

    Matthew.

  • 0 in reply to Matthew Jones1
    TI__Mastermind 46460 points

    Matthew,

    That is good to hear!

    Tom