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Altera_Forum's avatar
Altera_Forum
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21 years ago

LWIP doesn't work...

Hi!

I have tested stand-alone lwip with Nios2 standard example design, and it works fine. I implemented multiprocessor environment where is three standard nios 2 processors. One processor is going to handle interface to Internet and others have some other work. But stand-alone lwip doesn't work in Internet interface handler, sometimes it prints something like this "can't get mac-address, modify get_mac_address function...", and sometimes nothing, but telnet connection is not working.

Have someone any idea where to start looking the reason for this behaviour?

Thanks..

-CoolMan

5 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    21 years ago

    The get_mac_address function is coverred in the Nios II Software Developers Handbook in Chapter 9, you should read this first.

  • Altera_Forum's avatar
    Altera_Forum
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    21 years ago

    Hi Coolman,

    Modify you mac_addr.c file to look something like this. 

    #include "alt_types.h"# include "io.h"# include "lwip/netif.h"
/*
* read_mac_address
*
* Read the MAC address in a board specific way
*
*/
err_t read_mac_address(struct netif *netif)
{
  err_t ret_code = ERR_IF;
  alt_u32 signature;
  /*
  * Our board has the MAC address stored at 0x7f000 in flash
  */# if defined(ALTERA_NIOS_DEV_BOARD_CYCLONE_1C20) ||
    defined(ALTERA_NIOS_DEV_BOARD_STRATIX_1S10) ||
    defined(ALTERA_NIOS_DEV_BOARD_STRATIX_1S10_ES) ||
    defined(ALTERA_NIOS_DEV_BOARD_STRATIX_1S40)
  signature = IORD_32DIRECT(0x7f0000, 0);
  if (signature != 0x00005afe)
  {
    fprintf(stderr, "\n-- FIX THIS -- Can't read the MAC address from flash -- FIX THIS -- .\nSetting MAC address to default FF:FF:FF:FF:FF:FF\n");
    netif->hwaddr_len = 6;
    netif->hwaddr = 0xFF;
    netif->hwaddr = 0xFF;
    netif->hwaddr = 0xFF;
    netif->hwaddr = 0xFF;
    netif->hwaddr = 0xFF;
    netif->hwaddr = 0xFF;
    ret_code = ERR_OK;    
  }
  else
  {
    /* Set MAC hardware address length */
    netif->hwaddr_len = 6;
    netif->hwaddr = IORD_8DIRECT(0x7f0000, 4);
    netif->hwaddr = IORD_8DIRECT(0x7f0000, 5);
    netif->hwaddr = IORD_8DIRECT(0x7f0000, 6);
    netif->hwaddr = IORD_8DIRECT(0x7f0000, 7);
    netif->hwaddr = IORD_8DIRECT(0x7f0000, 8);
    netif->hwaddr = IORD_8DIRECT(0x7f0000, 9);
    ret_code = ERR_OK;
  }# else
  fprintf(stderr, "Not an Altera board.\nYou need to modify the function read_mac_address to set a MAC address for your board.\n");# endif
  return ret_code;
}

    Here you simply replace the FF's with the correct MAC address.

    NOTE this is an UGLY hack just to get it working. It CAN NOT / SHOULD NOT be used in a production system.

    It should at least give you an idea of where to look for your problem
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    21 years ago

    Hi,

    thank for your advices. But unfortunately it is not working. Is there possibility to be something wrong with my hardware connections, bdf-file or sopc-builder-file?

    Have you any idea?

    Thanks..

    -CoolMan
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    20 years ago

    --- Quote Start ---

    originally posted by coolman@Oct 15 2004, 12:31 AM

    hi,

    thank for your advices. but unfortunately it is not working. is there possibility to be something wrong with my hardware connections, bdf-file or sopc-builder-file?

    have you any idea?

    thanks..

    -coolman

    <div align='right'><{post_snapback}> (index.php?act=findpost&pid=2106)

    --- quote end ---

    --- Quote End ---

    Hi Coolman,

    same prob here.... using nios II ide 5.0....

    quite frustrating as it is

    cheers,

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

    --- Quote Start ---

    originally posted by dannyjacobs+nov 4 2005, 10:27 am--><div class='quotetop'>quote (dannyjacobs @ nov 4 2005, 10:27 am)</div>

    --- quote start ---

    <!--quotebegin-coolman@Oct 15 2004, 12:31 AM

    hi,

    thank for your advices. but unfortunately it is not working. is there possibility to be something wrong with my hardware connections, bdf-file or sopc-builder-file?

    have you any idea?

    thanks..

    -coolman

    <div align='right'><{post_snapback}> (index.php?act=findpost&pid=2106)

    --- quote end ---

    --- Quote End ---

    Hi Coolman,

    same prob here.... using nios II ide 5.0....

    quite frustrating as it is

    cheers,

    Danny

    <div align='right'><{post_snapback}> (index.php?act=findpost&pid=10796)</div>

    [/b]

    --- Quote End ---

    Hi all,

    solved it... your should remove the if statement and just assign an own MAC. It works http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/smile.gif

    Danny