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TM4C129ENCPDT: ethernet static ip not working with tivaware / lwip

Kraftfahrzeughaftpflichtversicherung
Prodigy 200 points
Part Number: TM4C129ENCPDT

Hi. I've been chasing a problem for hours. DHCP works fine but the static IP is screwed up (and I need both to work).

I'm even using the latest and greatest tivaware 2.1.4.178.

I do have #define LWIP_DHCP 1 because the customer will be able to use DHCP or assign a static ip.

I finally traced what appears to be the problem to a little function called lwIPLinkDetect();

It wipes out the IP address (this is in lwiplib.c):

    //
    // Clear any address information from the network interface.
    //
    ip_addr.addr = 0;
    net_mask.addr = 0;
    gw_addr.addr = 0;
    netif_set_addr(&g_sNetIF, &ip_addr, &net_mask, &gw_addr);

I added this right above as a fix: if (g_ui32IPMode == IPADDR_USE_STATIC) return;

I'm not sure if I was just doing something wrong or what was going on but for anybody that has the same problem I'm posting the complete function below with the fix in it.

//*****************************************************************************
//
// This function performs a periodic check of the link status and responds
// appropriately if it has changed.
//
//*****************************************************************************
#if LWIP_AUTOIP || LWIP_DHCP
static void
lwIPLinkDetect(void)
{
    bool bHaveLink;
    struct ip_addr ip_addr;
    struct ip_addr net_mask;
    struct ip_addr gw_addr;

    //
    // See if there is an active link.
    //
    bHaveLink = MAP_EMACPHYRead(EMAC0_BASE, PHY_PHYS_ADDR, EPHY_BMSR) & 
                                EPHY_BMSR_LINKSTAT;

    //
    // Return without doing anything else if the link state hasn't changed.
    //
    if(bHaveLink == g_bLinkActive)
    {
        return;
    }

    //
    // Save the new link state.
    //
    g_bLinkActive = bHaveLink;

    if (g_ui32IPMode == IPADDR_USE_STATIC) return;
    //
    // Clear any address information from the network interface.
    //
    ip_addr.addr = 0;
    net_mask.addr = 0;
    gw_addr.addr = 0;
    netif_set_addr(&g_sNetIF, &ip_addr, &net_mask, &gw_addr);

    //
    // See if there is a link now.
    //
    if(bHaveLink)
    {
        //
        // Start DHCP, if enabled.
        //
#if LWIP_DHCP
        if(g_ui32IPMode == IPADDR_USE_DHCP)
        {
            dhcp_start(&g_sNetIF);
        }
#endif

        //
        // Start AutoIP, if enabled and DHCP is not.
        //
#if LWIP_AUTOIP
        if(g_ui32IPMode == IPADDR_USE_AUTOIP)
        {
            autoip_start(&g_sNetIF);
        }
#endif
    }
    else
    {
        //
        // Stop DHCP, if enabled.
        //
#if LWIP_DHCP
        if(g_ui32IPMode == IPADDR_USE_DHCP)
        {
            dhcp_stop(&g_sNetIF);
        }
#endif

        //
        // Stop AutoIP, if enabled and DHCP is not.
        //
#if LWIP_AUTOIP
        if(g_ui32IPMode == IPADDR_USE_AUTOIP)
        {
            autoip_stop(&g_sNetIF);
        }
#endif
    }
}
#endif