Re: [lwip-users] CRC error when dhcp_start() used

[TJO]

Hi, 

I do not call lwip functions from interrupts.
I ise netconn API
I mean 1.4.1 yes, 
The NO_SYS is 0 using lwip function for handling timers. So I do not use the 
sys_check_timeouts() function.
It do send the DHCP request and the stack works great if I do not use DHCP

Thomas

-----Original Message-----
From: address@hidden [mailto:address@hidden On Behalf Of Sergio R. Caprile
Sent: 17. februar 2016 14:07
To: address@hidden
Subject: Re: [lwip-users] CRC error when dhcp_start() used

lpc_ functions are not part of lwIP. You should go to LPC forums to see what 
they do and why they report Ethernet frame CRC errors, thing lwIP does not know 
and so does not care about.

You seem to be having a memory trashing scenario.
Make sure interrupts do not call lwIP functions, lwIP is single-threaded, you 
can basically use it from multiple threads only by using the netconn and socket 
API (do you?), but even so, the main lwIP code is mostly non-reentrant.

By 1.4.x you mean x=?
In 1.4.1, I'm not sure because I've never used NO_SYS=0, you should be calling  
sys_check_timeouts() while you wait. There are timers for DHCP.
(You must for NO_SYS=1). Are you ?

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