use STM32L5 or H5 with an external PHY ksz8851 chip to access the Internet.

[WL1]

In this regard, I would like to use STM32L5 or H5 development boards to implement the LWIP protocol stack+FREERTOS minimal system. I have no idea how to build the LWIP protocol stack on the FREERTOS system. May I ask if you can send me the LWIP protocol stack code or demo suitable for STM32L5 or H5。Thanks!

[mbarg.1]

Start a new project, select download any example flagging MCU family and LWiP ! 

With STM32CubeIde, of course.

[WL1]

thanks for reply .For example, can I create a f407 project with LWIP+Freertos and directly copy the LWIP related code into the L5 project

[mbarg.1]

No, you cannot take all - you need to write low level drivers and later interface to LWIP - It depends to what hardware you are using, every hw has it own requirements

[Guillaume K]

Does the external PHY ksz8851 use a RMII bus to connect to the micro controller ?

The STM32L5 doesn't have an Ethernet MAC IP (no RMII ethernet interface).

[WL1]

l5 use spi connected ksz8851 

[mƎALLEm · Accepted solution]

Hello,

That's definitely an ETH controller not just an Ethernet PHY .

There was someone used KSZ8851SNL with STM32H7. See this github link, ioc file included. So you need to inspire from it.

Hope that helps.