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Re: [lwip-users] Trying to work out DHCP issue

From: goldsimon
Subject: Re: [lwip-users] Trying to work out DHCP issue
Date: Tue, 27 Feb 2018 18:39:17 +0100
User-agent: K-9 Mail for Android

Chris Seto wrote:
>I have a custom board with an STM32F4, and a TLK110 running LwIP 2.0.3.
>board works great when it gets, an address, and I can freely exchange
>with a socket server.
>On board bootup, I set the IP to 0 and then use dhcp_start() to start
>When the code sees that the IP is no longer just 0, it tries to connect
>the socket server.
>Most of the time this works well.

This looks like a threading issue. The examples from STM are horribly wrong in 
that respect. Read the docs at http://www.nongnu.org/lwip/ to learn about 
threading. Also, try upgrading to fit master and use the new 
LWIP_ASSERT_CORE_LOCKED() check (has to be implemented for your arch, look at 
our Freertos port for an example).


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