STM32N6570-DK: How to integrate a custom Ethernet PHY (MXL86110I) driver instead of RTL8211/LAN8742 generated by CubeMX?

[GKarthik]

Hello,

I am working on an STM32N6570-DK project using NetX Duo generated through STM32CubeMX.

CubeMX provides PHY options such as RTL8211 and LAN8742. However, my hardware uses an MXL86110I-AQB-R Ethernet PHY connected through the RGMII interface.

I would like to know the recommended method for integrating a custom PHY driver when the required PHY is not available in CubeMX.

My questions are:

1. Can a project be generated using RTL8211 and then modified to use a custom MXL86110I PHY driver?

2. Which source files are responsible for PHY initialization, auto-negotiation, link status detection, and speed/duplex configuration?

3. Is there a PHY driver abstraction layer that custom PHY drivers must implement to work with the STM32 Ethernet driver and NetX Duo?

4. Are there any examples showing integration of a third-party PHY that is not listed in CubeMX?

5. What is the recommended approach for maintaining custom PHY support when regenerating code from CubeMX?

Project details:

• MCU: STM32N6570

• Board: STM32N6570-DK

• Middleware: NetX Duo

• PHY: MXL86110I-AQB-R

• Interface: RGMII

Any guidance would be appreciated.

Thank you.