LWIP doesn't work...

Altera_Forum · ‎10-14-2004

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

Altera_Forum · ‎10-14-2004

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

Altera_Forum · ‎10-14-2004

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&#39;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 · ‎10-15-2004

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 · ‎11-04-2005

--- 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 · ‎11-04-2005

--- 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