Re: [lwip-users] send/receive issue with lwip - FBE - fatal bus error DMACSR 12 th bit

[Dave Nadler]

Are you aware of (and you have fixed) all H7 driver bugs listed here?

https://community.st.com/s/question/0D50X0000BOtfhnSQB/how-to-make-ethernet-and-lwip-working-on-stm32

Are you using LwIP 2.0.0 as distributed by ST, or the latest 2.1.2?

On 2/6/2020 5:43 AM, anandhram via lwip-users wrote:

> confirm 510917de6b2772da55f5f72e5353185919cedca0
>
> hi,
> STM32 lwip stack issue - frames/not received/processed - FBE error
> FBE bit 12 -Fatal bus error.
> STM board used : STMh743
> is there any timing problem or a configuration problem with the clock, bus
> speed or DMA?
> Environment : 100Mbit/s full duplex ethernet used. 
>
> below are the additional information based on the new tests.
> from the ethernet analyzer , its been found the error occurs at the below
> occation.
>     1. time interval <40us ,dataframes sent out and received by STM32h7
> board
>         DMACSR FBE error is set.same issue is reported by switch also as
> error frames.
>         note: the same issue is observed with evaluation board also.
>     2. if time interval >40us to miliseconds ,dataframes sent out and
> received by STM32h7 board
>        is received and sent correctly without any errors.
>
> --
> Sent from: http://lwip.100.n7.nabble.com/lwip-users-f3.html
> _______________________________________________
> lwip-users mailing list
> address@hidden
> https://lists.nongnu.org/mailman/listinfo/lwip-users
>

-- 
Dave Nadler, USA East Coast voice (978) 263-0097, address@hidden, Skype 
 Dave.Nadler1