Re: [lwip-users] STM32F7 HAL issues

[Mário Luzeiro]

Hi Nico,
I had issues with STM and the DMA fix did really improved.
There was lot of work then trying to find the best configurations that works 
for me, but nothing more that I need to hack to get it working...

Mario Luzeiro

________________________________________
From: lwip-users <lwip-users-bounces+mrluzeiro=address@hidden> on behalf of 
Sachs, Nico <address@hidden>
Sent: 17 January 2020 09:09
To: Mailing list for lwIP users
Subject: [lwip-users] STM32F7 HAL issues

Hi,
I know there were or are a lot of issues around stm32 ethernet  STM HAL / 
etherenetif from CubeMX etc.. which can be found on the st community or 
discussed here.
I try to reopen this conversion, since anything which I found won't solve my 
issue.

Issue: I run the http example from contrib on lwip 2.1.2. FS from example, and 
generated my file using makefsdata. So, If I now open the website, I get 
somewhere a frame which previous segment was not captured, resulting in some 
delays/timeouts on the full website load.

I had hope that this which I found here 
https://community.st.com/s/question/0D50X00009XkgffSAB/stm32f746-ethernet-dma-transmit-problem
 would help on the issue, but including the memory barrier instruction wont 
help. But if I include some Delay before HAL_ETH_TransmitFrame(&heth, 
framelength); it works like a charm.

So it has something to do with the descriptors, but I can't figure it out how 
to solve it. And I don't want to leave that delay in there.

Is, there anybody out there who had similar issues?

Cheers
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