AnsweredAssumed Answered

STM32F746 discovery Ethernet don't work if the LwIP MEM_SIZE value is increased.

Question asked by mendes.ari.001 on Dec 6, 2016
Latest reply on Dec 7, 2016 by bauch.aaron.001

Hi,

I used the CubeMX 4.18 to do a simple LwIP UDP server project for the STM32F746-Discovery board. It works well for the default configuration. But If the LwIP MEM_SIZE is increased for 64K bytes or more, or if a buffer with 64K bytes or more is created. The Ethernet don't work anymore, neither for reception or for transmittion. 

 

Anyone have any idea about the cause of this issue?

 

Ari.

Outcomes