Re: [lwip-users] fragmentation failure with stm32 if length > 1704

[address@hidden]

Am 11.12.2019 um 18:55 schrieb Ranran:
> Hello,
>
> I use a simple echo udp example for STM32 Hal , with stm32h743 EVAL.
> I encounter exception (it shows as unaligned exception, but the
> address is not anything we allocated.
>
> This failure happen if I increase the packet size from 1704 to 1744 !
>
> tcip_thread->tcip_timeouts_mbox_fetch->sys_check_timeouts->lwip_cyclic_timer->ip_reass_timr->ip_reass_free_complete_datagram
> exception error of type unaligned access.
>
> I tried to increase various  size in lwipopts.h but nothing helps.
>
> Is it stm32 issue ?
> Any idea ?

Doesn't ring a bell. Last time I tested, fragmentation/reassembly worked
just fine, so I expect this is a platform/config specific issue.

Regards,
Simon