Hi,
Might I add a suggestion from my experience?
I also have a system with limited memory availability. When my system
needs to serve a web page, I serve most of it in chunks from ROM,
constructung the variable parts in memory when needed.
The page server includes multiple function calls, as below:
netconn_write(thisconn, http_page_start, strlen(http_page_start),
NETCONN_NOCOPY);
netconn_write(thisconn, http_page_style_open,
strlen(http_page_style_open), NETCONN_NOCOPY);
where the macros "http_page_start" etc. are defined constant strings
containing several lines of html.
I find this method uses very little memory, no matter how big the
eventual page served is.
Hope this is useful.
Regards,
Mike Fleetwood.
On 31/08/2016 19:56, Noam Weissman wrote:
Hi Anand,
I do not know what HTTP server you use but what I sent earlier is just
a skeleton or pseudo code
for you to get an idea on how to send a large buffer in chunks.
If you cannot send the hole buffer (make sense) and you are limited
with memory you must wait
for the TCP stack to free the buffer it used to send your data before
you can send more. Here comes
the sent call back in hand... it synchronizes sending and freeing of
memory.
Do you understand that ?
Try and follow the code I wrote in an earlier reply.
Good luck,
Noam.
------------------------------------------------------------------------
*From:* lwip-users <lwip-users-bounces+noam=silrd....@nongnu.org> on
behalf of goldsi...@gmx.de <goldsi...@gmx.de>
*Sent:* Wednesday, August 31, 2016 9:31 PM
*To:* Mailing list for lwIP users
*Subject:* Re: [lwip-users] LW IP - TCP instantaneous data transmission
anand arjunan wrote:
> Should I do something in the http_sent callback to make room for next
> set of data ?
I'm afraid I don't really understand your questions. As Noam said, have
a look at the http server, I guess you can learn everything you need
from there.
SImon
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