Re: [lwip-users] get dynamic ip on lwip-1.4.0.rc1

[Simon Goldschmidt]

You are completely violating lwIP threading: when using tcpip_input and the 
tcpip_thread, timers are called for you from that thread already. Also, 
dhcp_start() may *not* be called from any other thread than the tcpip_thread 
(as any other functions not explicitly allow). Please do read the little 
documentation we have and/or have a look at the examples.

Simon


PHAM ANH THIEN <address@hidden>:
> Dear all,
> 
> Has Anyone test get dynamic ip on lwip-1.4.0.rc1? I try to do it with this
> code:
> 
>     {
>         /* Configure dynamic IP */
>         vhPrintf("Configure dynamic IP...\n");
>         netif_add(pEMAC_if, NULL, NULL, NULL, NULL, ethernetif_init,
> tcpip_input);
>         /* make it the default interface */
>         netif_set_default(pEMAC_if);
>         dhcp_start(pEMAC_if);
> 
>         while (pEMAC_if->ip_addr.addr==0) {
>             PSA_Services_WaitMs(DHCP_FINE_TIMER_MSECS);
>             dhcp_fine_tmr();
>             mscnt += DHCP_FINE_TIMER_MSECS;
>             if (mscnt >= DHCP_COARSE_TIMER_SECS*1000) {
>                 dhcp_coarse_tmr();
>                 mscnt = 0;
>             }
>         }
> 
>         vhPrintf("\nDone with DHCP");
>         vhPrintf("\nAccquired IP = %d.%d.%d.%d\n",
>                                 0xff & (pEMAC_if->ip_addr.addr),
>                                 0xff & (pEMAC_if->ip_addr.addr >>8),
>                                 0xff & (pEMAC_if->ip_addr.addr >> 16),
> 
>                                  0xff & (pEMAC_if->ip_addr.addr >>24)
>                                 );
>     }
> 
> but it could not work, the attached file is log message i got, it hang at
> there! I notice that the same above code i used i can get dynamic ip with
> lwip version 1.3.1.rc1.
> 
> Thanks in advance!
> Thien

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