Doing the cache invalidation is best for speed.
I am personally the type of person who thinks that every problem needs two
fixes, first is the fix for the problem, second is the fix as to why the
problem came into existence and/or was not found earlier. Hence I like to
know that when I invalidat
Hello,
Beware that everything should be cache line aligned!
To be future proof assume cache size is 64 bytes, even if it's 32 bytes.
I recommend making the TX descriptors non-cacheable, bufferable
and the RX descriptors non-cacheable, non-bufferable and the DMA
buffers fully cacheable and use ca
Am 25.03.2021 um 12:44 schrieb Trampas Stern:
> Rather than flushing cache you can create a non-cached section of RAM in
> the linker script and put buffers there.
But be aware that using non-cached buffers might be slow. While putting
the DMA descriptors into uncached memory is a good solution (y
;
> David
>
>
>
> *From:* lwip-users leicabiosystems....@nongnu.org> *On Behalf Of *Trampas Stern
> *Sent:* Thursday, 25 March 2021 4:10 AM
> *To:* Mailing list for lwIP users
> *Subject:* Re: [lwip-users] Why does enabling Debug fix this tcp_sndbuf()
>
>
>
> I h
ed all the issues yet.
Thanks for your help everyone.
Cheers
David
From: lwip-users
On Behalf Of
Trampas Stern
Sent: Thursday, 25 March 2021 4:10 AM
To: Mailing list for lwIP users
Subject: Re: [lwip-users] Why does enabling Debug fix this tcp_sndbuf()
I had similar problem with an ATSAME70 whi
:
+61 3
8400 4566 alis...@advateklights.com www.advateklights.com
-Original Message-
From: lwip-users On Behalf Of goldsi...@gmx.de
Sent: Thursday, 25 March 2021 6:11 AM
To: Mailing list for lwIP users
Subject: Re: [lwip-users] Why does enabling Debug fix
I had similar problem with an ATSAME70 which was an M7 core. Turns out
that the ethernet driver from Microchip did not invalidate cache for the
ethernet MAC driver. Hence it would work some of the time and not others,
like when debugging was on. Disabling the data cache on the processor
would al
Am 24.03.2021 um 16:32 schrieb Osborne, David:
> Hi All,
>
>
>
> I’m using LwIP + FreeRTOS + Sockets on STM32H7 with external SDRAM and
> FLASH (Ethernet buffers are internal). It works well until the server
> has to send a very large message (> 18Kbytes). One in five attempts
> ends in failure
Hi All,
I'm using LwIP + FreeRTOS + Sockets on STM32H7 with external SDRAM and FLASH
(Ethernet buffers are internal). It works well until the server has to send a
very large message (> 18Kbytes). One in five attempts ends in failure. During
the transmission tcp_sndbuf() (in api_msg.c) return
