Hi Chistoph:
The "lwIP Embedded Webserver Demo" is what I took as a starting point. I
removed the webserver functionality, now I have a task that
* checks for incoming data (nonblocking)
* checks a Queue for outgoing data (nonblocking)
* wait 1 ms (to prevent 100% cpu usage)
* repeat :-)
the LwIP webserver demo code is following, I don’t know how do you infer it is
noblocking for incoming data and outgoing ….
Where to wait 1 ms .
void WebServer_Handler(void *pdata)
{
struct netconn *__pstConn, *__pstNewConn;
__pstConn = netconn_new(NETCONN_TCP);
netconn_bind(__pstConn, NULL,80);
netconn_listen(__pstConn);
for(;;)
{
__pstNewConn = netconn_accept(__pstConn);
if(__pstNewConn != NULL)
{
vHandler_HTTP(__pstNewConn);
while(netconn_delete(__pstNewConn) != ERR_OK)
{
vTaskDelay(10);
}
}
}
}
Vincent Cui
Sr.Firmware Engineer
Mobile: +8613482482211
Tel: +86 21 34612525x6104
Fax: +86 21 34619770
E-Mail: [email protected]<mailto:[email protected]>
Shanghai EnLogic Electric Technology Co., Ltd.
Address: 1104-1106, Building A, No.391, Guiping Road, Xuhui District, Shanghai,
200233
http://www.enlogic.com
From: [email protected]
[mailto:[email protected]] On Behalf Of
Christoph Kronen
Sent: 2011年8月29日 0:48
To: [email protected]
Subject: [lwip-users] FreeRTOS / lwip multiple connections
Hi all,
I am using FreeRTOS 7.0.1 on a Sam7X512 and upgraded the contributed port lwIP
1.3.0 to 1.3.2.
The "lwIP Embedded Webserver Demo" is what I took as a starting point. I
removed the webserver functionality, now I have a task that
* checks for incoming data (nonblocking)
* checks a Queue for outgoing data (nonblocking)
* wait 1 ms (to prevent 100% cpu usage)
* repeat :-)
This works pretty well, I get around 1400 kbyte/s RX and TX.
Now to my question: Is it possible/difficult/easy to transform this
functionality to accept multiple connections on the same port ? At the moment I
am using the netconn API, so I guess I have to switch to the Socket API ?
I read through Richards thread on his "FreeRTOS/lwip Win32 simulator" project
and it sounds as if it is quite difficult to have multiple connections in a
multithreaded environment. Unfortunately I could not find other helpful topics
or contributed examples.
I am rather new to FreeRTOS and lwIP, so please excuse me if I am missing
something obvious :-)
Please give me some comments / suggestions / tips / pushes into the right
direction.
Thank you very much !
Christoph
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