How to run CubeMX-generated LWIP with LAN8742? DHCP doesn't work, but ST'example works.

[itxs]

Hello, I am trying to run a project generated by STM32cubeMX. DHCP thread code I got from ST example called "STM32H723 webserver demo" and put it to my code. Communication between PHY and STM32 works well, DHCP doesn't work. Even if I put a static IP, it doesn't connect to my router. But if I download that ST webserver example, everything is ok, and DHCP works. Where is the problem? I did Lwip configuration via CubeMX equal to Lwip configuration in that ST example, everything other is the same (linker areas, MPU config, etc). I haven't in my project an HTTP server yet, I just want to ping my device from my PC. DHCP stops at SELECTING state.

[Imen.D]

Hello @itxs​ ,

Did you tried to follow theses articles:

• Ethernet not working on STM32H7x3
• How to create project for STM32H7 with Ethernet and LwIP stack working

Imen

[itxs]

Thank you, now I did all like in these articles, but nothing changed, DHCP hold in SELECTING state

[itxs · Accepted solution]

My bad, I forgot to add the controlling of nRST pin. Stupid mistake.