in original "macb.c" driver. I send
my conclusion to Atmel's developper ...
Best Regards
Martin Persich
- Original Message -
From: Dany Thiffeault
To: Mailing list for lwIP users
Sent: Tuesday, March 30, 2010 6:01 PM
Subject: Re: [lwip-users] Help in getting maximum throughp
Dany Thiffeault wrote:
I found in the AVR32 datasheet this line:
• Automatic Pad and CRC Generation on Transmitted Frames
That is referring to the padding (to a minimum length) of Ethernet frames,
and the CRC which is appended to every Ethernet frame. (These are
implemented in hardware on alm
> I found in the AVR32 datasheet this line:
> • Automatic Pad and CRC Generation on Transmitted Frames
Probably this function has not impact on the LWIP checksum but only
for Ethernet frame checksum (FCS or CRC32).
http://en.wikipedia.org/wiki/Ethernet_frame#Physical_layer
Martin
_
ok, thanks to David for the nice explanation. I was a little lost!
Chris and Simon, thanks too. I will try the 1516 size right away.
I found in the AVR32 datasheet this line:
• Automatic Pad and CRC Generation on Transmitted Frames
I guess it's what I want, but it doesn't seem intuitive to enable
Dany Thiffeault wrote:
> oh and Simon, another question. I haven't seen anything about this in your
> wiki, but are PBUF_POOL_SIZE and PBUF_POOL_BUFSIZE important too?
Oh, then it seems like I forgot those two: PBUF_POOL_SIZE is the number of
PBUF_POOL pbufs, each with a size of PBUF_POOL_BUFSIZ
Dany Thiffeault wrote:
> - How do I know if the checksum can be calculated by the hardware? I'm
> using
> a board I made but based on the Atmel EVK1100.
I'm guessing the ethernet MAC you use is embedded in the Atmel controller? You
should read the controller's manual, it should tell you whether
I would also suggest that you try using smaller packet buffers, say 256, and
more of them. The total mem used can be the same. The chaining in LWIP works
very well so there is little penalty on your large packets. However, many Enet
packets are ACKs, SYNs, FINs, etc. which are generally 100-2
- Original Message -
From: Dany Thiffeault
To: Mailing list for lwIP users
Sent: Wednesday, March 31, 2010 9:19 AM
Subject: Re: [lwip-users] Help in getting maximum throughput with LWIP.
hehe, another question.
I'm using Wireshark to see what's in flight. Whatever packe
; last idea. I changed ETHERNET_CONF_NB_TX_BUFFERS from 10 to 24 two days
>>> ago ...
>>> I haven't any problem solution in this moment.
>>> Martin Persich
>>>
>>>
>>> - Original Message -
>>> *From:* Dany Thiffeault
>&g
is moment.
>> Martin Persich
>>
>>
>> - Original Message -----
>> *From:* Dany Thiffeault
>> *To:* Mailing list for lwIP users
>> *Sent:* Monday, March 22, 2010 10:13 PM
>> *Subject:* Re: [lwip-users] Help in getting maximum throughput with LWIP.
>
-
> *From:* Dany Thiffeault
> *To:* Mailing list for lwIP users
> *Sent:* Monday, March 22, 2010 10:13 PM
> *Subject:* Re: [lwip-users] Help in getting maximum throughput with LWIP.
>
> wow, great thanks. I'll make some tests tomorrow.
>
> Indeed, I forgot to mention.
olution in this moment.
Martin Persich
- Original Message -
From: Dany Thiffeault
To: Mailing list for lwIP users
Sent: Monday, March 22, 2010 10:13 PM
Subject: Re: [lwip-users] Help in getting maximum throughput with LWIP.
wow, great thanks. I'll make some tests tomorr
Dany Thiffeault wrote:
wow, great thanks. I'll make some tests tomorrow.
Indeed, I forgot to mention. I'm using TCP with the netconn API. While
reading through the multiple posts I missed the past few months, I
found out that 1.3.2 is out and Atmel framework 1.7 too. I'll upgrade
everything t
wow, great thanks. I'll make some tests tomorrow.
Indeed, I forgot to mention. I'm using TCP with the netconn API. While
reading through the multiple posts I missed the past few months, I found out
that 1.3.2 is out and Atmel framework 1.7 too. I'll upgrade everything
tomorow.
But in the meantime
I just took the time to write something about performance/throughput on
the wiki:
- http://lwip.wikia.com/wiki/Maximizing_throughput
- http://lwip.wikia.com/wiki/Tuning_TCP
However, you didn't tell us if you are using TCP or UDP? Also, I don't
know what ETHERNET_CONF_NB_TX_BUFFERS is, so I'm gu
Hi,
I'm currently coding an application on a AVR32 UC3 board. The board is
actually an acquisition platform that's using Ethernet (lwip 1.3.1
currently). I'm using FreeRTOS and the Atmel framework 1.4.
My connection is working great with my Windows application. There are two
modes to my AVR32 app
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