Re: [lwip-users] lwip 1.2.0 + freeRTOS

[Sirjee Rooplall]

Yes I do have stack overflow check in place, and the stack is hardly used, I 
have allocated 1024*4 byte stacks for my tasks, which I can easily reduce as 
my stack is barely used from what I see in the stack stats been dumped to 
debug screen

It fails in this function which is called by QueueReceive which is called by 
sys_arch_mbox_fetch.

static void prvCopyDataFromQueue( xQUEUE * const pxQueue, const void 
*pvBuffer )
{
if( pxQueue->uxQueueType != queueQUEUE_IS_MUTEX )
{
 pxQueue->pcReadFrom += pxQueue->uxItemSize;
 if( pxQueue->pcReadFrom >= pxQueue->pcTail )
 {
  pxQueue->pcReadFrom = pxQueue->pcHead;  // **** ALWAYS FAILS HERE ****
 }
 memcpy( ( void * ) pvBuffer, ( void * ) pxQueue->pcReadFrom, ( unsigned ) 
pxQueue->uxItemSize );
}
}

Kind Regards, Sirjee Rooplall Figment Design laboratories (Pty) Ltd mailto: 
address@hidden Mobile: +27 (0)83 230 8466
----- Original Message ----- 
From: "FreeRTOS Info" <address@hidden>
To: "Mailing list for lwIP users" <address@hidden>
Sent: Monday, January 25, 2010 4:48 PM
Subject: Re: [lwip-users] lwip 1.2.0 + freeRTOS


Sirjee Rooplall wrote:

> If I look in my debugger, sorry I am using freeRTOS + ATMEL's UC3
> device, it crashes at FreeRTOS QueueReceive function which when I dig
> deeper is pending on sys_arch_mbox_fetch.


Can you say where in that function?

Do you have stack checking switched on?  (configCHECK_FOR_STACK_OVERFLOW
set to 2 in FreeRTOSConfig.h).



Regards,
Richard.

+ http://www.FreeRTOS.org
Designed for Microcontrollers.  More than 7000 downloads per month.

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> Is there any application not that would teach me more about proper usage
> of the LWIP API's, and hopefully it will deal with fail states as well.
>
> Thanks in advance.
>
> Kind Regards, Sirjee Rooplall Figment Design laboratories (Pty) Ltd
> mailto: address@hidden Mobile: +27 (0)83 230 8466
> ----- Original Message ----- From: "Simon Goldschmidt" <address@hidden>
> To: "Mailing list for lwIP users" <address@hidden>
> Sent: Monday, January 25, 2010 3:53 PM
> Subject: Re: [lwip-users] lwip 1.2.0 + freeRTOS
>
>
> > Sirjee Rooplall wrote:
> > > Hi Simon,
> > >
> > > I am new to LWIP, so I copied that code from an example I have seen.
> >
> > Well, then be so kind and tell the author of that example that it is
> > really a very bad one!
> >
> > > I removed the sleep and I have removed the access to the internal
> > > pcb, and
> > > only rely on the API now.
> > >
> > > The problem I am explaining, seems to also exist in LWIP 1.3.0, as I
> > > have
> > > seen in some of the recent lwip archives.
> >
> > Could you tell us where? Also, the current release is 1.3.2!
> >
> > > Another thing:
> > > Because I am connecting through a PPP->GPRS interface the possibility
> > > exists
> > > where someone removes the antenna and the connection longer exists,
> > > however
> > > the user can trigger a server connection externally through a push
> > > button,
> > > which will attempt to perform a neconn_connect which blocks and returns
> > > with
> > > ERR_ABRT(-3), how do I handle this senario without crashing the
> > > stack. At
> > > the moment, I keep trying every 30 seconds, and eventually I cause the
> > > stack
> > > to crash with too many netconn_connect without a physical connection
> > > available.
> >
> > Normally, that shouldn't be a problem. What exactly happens when you
> > say the stack 'crashes'?
> >
> > Oh, and please don't send so much code unless you have a very specific
> > question about it or someone asks you to. People tend to overread
> > mails containing too much code as it's rather difficult to understand...
> >
> > Simon
> > --
> > GRATIS für alle GMX-Mitglieder: Die maxdome Movie-FLAT!
> > Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01
> >
> >
> > _______________________________________________
> > lwip-users mailing list
> > address@hidden
> > http://lists.nongnu.org/mailman/listinfo/lwip-users
>
>
>
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