Re: [lwip-users] lwIP with FreeRTOS memory problem

[Noam Weissman]

Hi Simon,

Maybe I am wrong, it was 4-5 years ago :-).

As far as I remember communication stopped and maybe it crashed or not this is 
not the issue.
The issue is that once I set my defines as suggested this problem was never 
happened again.

From what I understand every connection has a new PCB and a pBuf that holds the 
received data.
if the system does do not have sufficient buffers but have sufficient PCB's 
this causes an abnormal 
behavior. I do not remember if that was a problem with version 1.32 or also in 
1.41  as I upgraded at 
some time.

BR,
Noam.

-----Original Message-----
From: lwip-users [mailto:address@hidden On Behalf Of Simon Goldschmidt
Sent: Tuesday, November 29, 2016 11:26 AM
To: address@hidden
Subject: Re: [lwip-users] lwIP with FreeRTOS memory problem

Noam Weissman wrote:
> Several years ago when I started working with LwIP I had a similar problems 
> to the one you raised.
> System was working ok but out of the blue it crashed.
> [..]
> I found the hard way that I am getting MEM_ERR because of the above. I 
> did not had sufficient MEMP_NUM_TCP_SEG defined. After changing the above to 
> what it is now those issues were solved.


How would your system crash because of insufficient tcp segment pool elements?
You could get communication hiccups, but it shouldn't crash!


Simon

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