[lwip-users] Crash in ip_init and very slow ping times

[Eric Shufro]

I have lwip 7.1 working (barely) with ucos-ii and a Motorola hcs12 micro-controller.

 

I have some questions.

 

First, it crashes within ip_init when a dhcp response arrives.

 

I noticed ip_init checks to see if netif == NULL and in this case, the netif is not null.

 

Why would lwip check for a null netif when receiving a dhcp response message?

 

 

Also, I know this may be more of an open ended question, but why on earth are the ping times soooo slow!?

 

When I wrote a custom protocol stack in motorola assembly, I was getting ping times of <1ms on the same hardware platform. Additionally, when I look at the cpu utilization, it doesn’t seem very busy, even when generating responses.

 

Thanks for the help.

 

--Eric Shufro