Custom STM32 PCB with LAN8742. How to get this working?

JR5 · ‎2024-08-27

Hi all,

Has anyone been successful in creating their own custom PCB with an STM32 and the LAN8742 PHY IC?

I have followed the reference design of the nucleo-f756zg Lan8742 implementation and used a stm32f107 IC.

I am struggling to understand how to use the lan8742.c driver with the Ethernetif.c file generated by LWIP in the cubeIDE

If anyone could talk me through initialisation and beyond or show a design with code where they have it working it would be much appreciated!

Thanks,

Joe

SofLit · ‎2024-08-28

Hello @JR5 and welcome to the community.

You can inspire from the STM32F107_EVAL board schematics (unfortunately no more available on ST website) that I'm attaching a part of it (but using DP83848C PHY). and refer to LWIP examples provided in STM32CubeF1 package: https://github.com/STMicroelectronics/STM32CubeF1/tree/master/Projects/STM3210C_EVAL/Applications/LwIP

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JR5 · ‎2024-09-16

Hi,

Thanks for this documentation.

Unfortunately I found a few bugs in the PCB design so i'm waiting for a respin before attempting again.

If i succeed I shall let you and the community know :)

Joe