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Re: [lwip-users] tcp_write() keeps returning ERR_MEM indefinitely once t
From: |
Diecol |
Subject: |
Re: [lwip-users] tcp_write() keeps returning ERR_MEM indefinitely once the buffer is filled |
Date: |
Mon, 13 Dec 2010 02:57:31 -0800 (PST) |
Can u do a example code?
I'm with same problem, but I dont know how to use thoses functions!
I was just doing like that:
Err = tcp_write(pcb, SndBuffer , SndBufferLen, 0);
tcp_output(pcb);
How do I procced?
thanks
Kentaro Yamamoto wrote:
>
> Hi Kieran,
>
> Thanks for the suggestion. It actually turned out that executing
> tcp_write continuously in a blocking manner in my tcp_recv callback
> function was the cause. Now I enqueue segments in a non-blocking
> manner outside tcp_recv using a tcp_sent callback function. This
> works fine.
>
> Thanks,
>
> Kentaro
>
> On Thu, Jun 3, 2010 at 4:39 AM, Kieran Mansley <address@hidden> wrote:
>> On Wed, 2010-06-02 at 21:13 -0400, Kentaro Yamamoto wrote:
>>> Hi all,
>>>
>>> I am trying to transfer a large amount of data from a microcontroller
>>> via TCP/IP. What I do is to keep executing tcp_write() until it
>>> returns ERR_MEM. The problem is that once tcp_write() returns
>>> ERR_MEM, it keeps returning ERR_MEM no matter how long I wait.. Am I
>>> missing something? I am using lwip 1.3.1.
>>
>> Do you also have a call to tcp_output()? tcp_write() will only queue
>> the packets, tcp_output() will get them going onto the wire.
>>
>> Kieran
>>
>>
>> _______________________________________________
>> lwip-users mailing list
>> address@hidden
>> http://lists.nongnu.org/mailman/listinfo/lwip-users
>>
>
>
>
> --
> Kentaro Yamamoto
> address@hidden
>
> _______________________________________________
> lwip-users mailing list
> address@hidden
> http://lists.nongnu.org/mailman/listinfo/lwip-users
>
>
--
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- Re: [lwip-users] tcp_write() keeps returning ERR_MEM indefinitely once the buffer is filled,
Diecol <=