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

[Mumtaz Ahmad]

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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