Re: [lwip-users] how lwip know internet cable is unplug

[vincent cui]

Simon:

You mean that I could polling the link status in a low priority task, the task 
does
1. disable dhcp if dhcp is enable in link loss case
2. enable dhcp if dhcp is disable in link recover case.

The link status from loss to recover will happen one time at boot time...so the 
dhcp enable will put the task too ?

锘?Vincent Cui
Sr.Firmware Engineer
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-----Original Message-----
From: address@hidden [mailto:address@hidden On Behalf Of Simon Goldschmidt
Sent: 2011年9月7日 15:46
To: Mailing list for lwIP users
Subject: Re: [lwip-users] how lwip know internet cable is unplug

vincent cui <address@hidden> wrote:
> Thank you for your reply …. Now, I know your method to deal with ….but
> it is not a good idea with polling ...

I agree that polling for RXframes isn't optimal, but link-change events 
shouldn't be too high-priority, so you could check/process them in a very 
low-priority task (which is what I did before having the interrupt).

Simon
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