Re: [lwip-users] MCU restart after receiving DHCP packet from Router

[Mike Spenard]

Well it's unlikely that LWIP itself is directly causing issue. You'll have to 
do some more isolation work to see what your problem follows exactly beyond a 
DHCP reply event.

Check your pin config for that MCU. You might not have the Drive Strength or 
pull-ups setup correctly to meet the needs of all physical scenarios for your 
PHY. 

Look into stack and heap usage. If they are running into each other you could 
throw an Assert and reboot your MCU.

Do you have callbacks to handle interface up/down events? Take a look at those 
if so.

/Random LWIP User

-----Original Message-----
From: lwip-users <lwip-users-bounces+ms=address@hidden> On Behalf Of sandip 
patel via lwip-users
Sent: Thursday, October 10, 2019 3:39 PM
To: address@hidden
Cc: sandip patel <address@hidden>
Subject: [lwip-users] MCU restart after receiving DHCP packet from Router

Hi All,

I am using STM32F407 over Ethernet with LwIP stack. I have enabled DHCP to get 
ip from router. 

My issue is , in some specific network, i am facing issue of STM32F407 gets 
reset after 4 sec of Ethernet cable plugged. This strange things happen every 
time i plugged Ethernet cable.

I have checked log in Wire-Shark and found that STM32F407 gets reset after DHCP 
packet received.  

It is not a hardware issue, as with same board Ethernet is working perfectly in 
other network, so it should be network related issue.

If anyone have any idea, Please help. 

Thanks



--
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