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.
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