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Re: [lwip-users] Corrupted ETH Rx Buffer in STM32H7 with TCP protocol
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From: |
Grant Edwards |
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Subject: |
Re: [lwip-users] Corrupted ETH Rx Buffer in STM32H7 with TCP protocol |
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Date: |
Tue, 31 May 2022 13:54:56 -0000 (UTC) |
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User-agent: |
slrn/1.0.3 (Linux) |
On 2022-05-31, Indan Zupancic <indan.zupancic@mep-info.com> wrote:
> This is probably because the ST driver releases the DMA buffers
> before you have handled the data. It tries to do zero copy, but does
> it wrong.
In my experience, target code provided by Silicon vendors is always
very poor quality and should never be trusted. It's been like that for
40 years, and I've seen no sign of change. I rarely use anything
except the include files that contain register definitions, and you
have to double-check those to make sure they're right.
--
Grant