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Altera_Forum's avatar
Altera_Forum
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17 years ago

lan91c111c debug on custom board

Hi all,

I have a custom made board that uses lan91c111 connected to a cyclone fpga. I tried first impementing the simple socket server example application. I needed to do some modifications because my system doesn't support any external flash memory. To overcome on this I changed a little bit the network_utilities.c to get the MAC address without accessing an external flash memory. Compilation succeeds, application starts giving the message:

"server starting up, socket listening on port 30".... or something likee this :rolleyes:

Anyway when I connect the ethernet cable leds doesn't get on neither on the pc-side ethernet board.

Please, does anyone have on idea if my idea of bypassing exterenal memory falsh could make the system not working?!

Can anyone suggest me a way to debug at low level the connection between NIOS and lan91c111!?

Thank a lot in advance!!

Massi

2 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    17 years ago

    I would double check your board design, top-level FPGA design connections and the connections from that top-level to SOPC Builder, first.

    - Use the Altera kits that include the 91c111 as a guide.

    - Pay attention to _all_ signals, not just the ones that are connected to the SOPC Builder module!

    Then I would proceed to stepping through the initialization of the ethernet driver in alt_sys_init.c (built as a part of your System Library...or BSP, depending on the flow you use).

    Cheers and Good Luck!

    - slacker
  • Altera_Forum's avatar
    Altera_Forum
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    17 years ago

    <div class='quotetop'>QUOTE (slacker @ Sep 4 2009, 10:54 AM) <{post_snapback}> (index.php?act=findpost&pid=23751)</div>

    --- Quote Start ---

    I would double check your board design, top-level FPGA design connections and the connections from that top-level to SOPC Builder, first.

    - Use the Altera kits that include the 91c111 as a guide.

    - Pay attention to _all_ signals, not just the ones that are connected to the SOPC Builder module!

    Then I would proceed to stepping through the initialization of the ethernet driver in alt_sys_init.c (built as a part of your System Library...or BSP, depending on the flow you use).

    Cheers and Good Luck!

    - slacker[/b]

    --- Quote End ---

    Thanks slacker,

    it succeeds, looking at other example design I found that resetn_to_lan91c111 from SOPC module wasn&#39;t really connected to the lan91c111 reset pin, along with other pins that are tied to a fixed voltage (VDD or VSS) on the board by some resistors.

    Now everything seems to work, I can, at least, connect to the socket.

    Thanks alot for your collaboration.

    Kind regards.

    Massimo