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Original question:

TM4C129ENCPDT: IGMP with LWIP

TM4C129ENCPDT: LWIP_IGMP device capabilities

Ping Wang
Intellectual 330 points
Part Number: TM4C129ENCPDT

Dear All

I need ti use IGMP, but it is not initialised in Tivaif_hwinit() function as below like Stellaris does:

/* Device capabilities */
psNetif->flags = NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP | NETIF_FLAG_LINK_UP;

I wonder whether this is a mistake?

Ping

  • 0
    TI__Guru*** 135355 points
    Hello Ping,

    I am not sure I am following, is the snippet you provide from Tiva or Stellaris? And what is the snippet from the other one? I can't easily compare the two when only one is provided...
  • 0 in reply to Ralph Jacobi
    Intellectual 330 points
    Hi, Ralph

    This is the corresponding one from Stellaris:

    /* device capabilities */
    /* don't set NETIF_FLAG_ETHARP if this device is not an ethernet one */
    netif->flags = NETIF_FLAG_IGMP | NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP | NETIF_FLAG_LINK_UP;

    I had to change the Tiva library file tiva-tm4c129.c to be same as above and now the IGMP is working.

    Regards!

    Ping
  • 0 in reply to Ping Wang
    TI__Guru*** 135355 points
    Hello Ping,

    So with the change everything works?

    It looks like the files that were changed are part of the lwip third party release. Is the Stellaris version an older lwip package? If so, then the change likely came from the lwip developers and is not something we can comment on why it was made.
  • 0 in reply to Ralph Jacobi
    Intellectual 330 points

    Hi, Ralph

    Yes, it turns out that was the issue after trace down.

    You are right, it is third party software, but included in Tiva Ware, I just hope there is a way to let the developers know.

    Thanks!

    Ping