RE : [lwip-users] Example port for a beginner

[Frédéric BERNON]

Look  http://www.sics.se/~adam/lwip/os.html. It's old, but most of the document is always valid. It explain "how" implement lwip with or without OS. Be careful about multithreading if you use it (lwip core have to be protected against concurrent access), but it's not your case I think.

 

 

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Frédéric BERNON
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P Avant d'imprimer, penser à l'environnement

 

-----Message d'origine-----
De : address@hidden [mailto:address@hidden De la part de Mumtaz Ahmad
Envoyé : mercredi 23 mai 2007 06:26
À : Mailing list for lwIP users
Objet : Re: [lwip-users] Example port for a beginner

1    In my point of view windows port is the most simple port to start with .

2    Yes lwip stack can be implemented without sys_arch.c provided that you understand where the stack should be made thread safe . I have done it by myself and implemented my own api layer as well .

4    Yes sys_timeouts  is pretty confusing but if you implement your own api layer then you can ignore it all together

 

----- Original Message -----

From: Bilahari Akkiraju

To: address@hidden

Sent: Wednesday, May 23, 2007 3:19 AM

Subject: [lwip-users] Example port for a beginner

  Hello all ,  I have few questions on lwip-1.2.0 ( I hope I have chosen a minimum risk version, is it a stable version)

1 . Any good example of a port that’s available for a beginenr who is trying to port lwip to ppc 83xx.

2. Can I port lwip stack without implementing sys_arch.c at all. I mean without impelementing semaphore and mailbox funcs.

3 . Should I change or add some stuff in sys.c like in sys_arch.c.

4. And what exactly does sys_timeouts structure in sys.h signify  ? I see that it’s a linked list with each node having time value, handler and its arguments. Whats the logic behind duch design, why is it a linked list, does it store different timers each with its own base value, handler that fires when it hits low or a high ?. I am throughly confused about this way of dealing with timeouts.

Thanks.

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