send/receive issue with lwip - FBE - fatal bus error DMACSR 12 th bit

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send/receive issue with lwip - FBE - fatal bus error DMACSR 12 th bit

lwip-users mailing list
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.



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Re: 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?
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
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Dave Nadler, USA East Coast voice (978) 263-0097, [hidden email], Skype 
 Dave.Nadler1

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