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Last Post 01 Sep 2005 05:42 AM by  overet
MCF5485 power problem?
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overet
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25 Aug 2005 09:03 AM
    Hi,
    I'm using a LinuxBSP non PCS (kernel 2.6.10) and i have compiled "ne2k_pci" module for a NE2000 PCI ethernet card. The compilation works fine. After the Linux sytem booting, i load the ne2k_pci module for my card but the card doesn't work.

    Making the command "lspci" the card isn't found. Anyone know a solution for this
    problem? Are there a power problem for some PCI cards? Anyone know a PCI ethernet card or USB ethernet adapter that works fine with the MCF5485 board?

    Tanks.

    Regards,
    Giuseppe Gottardi
    kurtl@logicpd.com
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    26 Aug 2005 11:58 AM
    overet,
    Few comments that might help you. Regarding your question about PCI power limitations, this document indicates that the power supply provided with the development kit may not supply enough power for some PCI devices. In order to ensure your PCI card is getting enough power, you should use an ATX power supply. Refer to section 7.2 of this document for more information.
    http://www.logicpd.com/do...7/70000230_Rev_E.pdf

    Out of curiousity, why do you need an additional ethernet port? The MCF54xxxFE ETX modules all have 2 supported ethernet devices onboard. Does your application require 3 or more ethernet ports?

    Thanks,
    -Kurt
    overet
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    29 Aug 2005 05:25 AM
    Hi KurtL,
    i have attached the ATX power supply to my board and it works when there'is not any PCI card into PCI slot. When i attach a PCI card and push power button, the green led on the board is lighting for a few milliseconds and then the board not works.

    I tried four Ethernet PCI cards type and i have the same result for all cards.

    Have you an idea to resolv this problem? thanks.

    PS
    Yes, i need three ethernet cards because i have to do an embedded ethernet switch to test my algorithm of Secure Switching (SAS) that works against ARP Posinonig attacks.
    kurtl@logicpd.com
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    29 Aug 2005 09:24 AM
    overet,

    Which kit do you have? M54xxLITEKIT or the M54xxEVB?
    Which LED are you refering to on the kit? On the M54xxLITEKIT D14 or on the M54xxEVB D11, D12, D13, or D14?

    On my end for a sanity check, I pulled out a M5475EVB which has a M5475CFE SOM. I used a 300W ATX supply to power the board. I tested a 3COM 3CSOHO100B-TX ethernet adapter in the J16 PCI slot. When I pressed S2, the board powered up as it should. I also tried a National DP838x chipset ethernet adapter with similar results.

    Are you using any PCI extenders or right angle adapters? While experimenting with my kit I found that if I plugged in a right angle PCI adapter backwards, the board would exhibit the characteristics you described above where, when you press the S2 button, the D14 LED would power on for a few milliseconds, then turn off right away.
    overet
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    01 Sep 2005 05:42 AM
    Well, i have resolved my problem. It was in the ethernet PCI card. The card described is working at 5V, but the board works only with 3.3V PCI cards.

    Now i have another problem. This is software problem with the linux kernel non PCS 2.6.10 version. The Bridge module not works properly on the coldfire arch. I seen that it have a problem with rcu_dereference() function, that return a NULL pointer while it shouldn't.

    Do you have found the same problem in some situation?

    Best regards and thanks for your reply,
    Giuseppe Gottardi
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