I down the demo which named as : x-cube-azrtos-f4-main.zip , in the file nx_stm32_eth_driver.c

[gmao]

I have read some functions carefully and have many questions... How can i get guidance from exports of ST, not from the community?

[Piranha]

https://github.com/azure-rtos/netxduo

https://learn.microsoft.com/en-us/azure/rtos/netx-duo/chapter5

[gmao]

Hi Piranha,

why you give me such links? I just have question about some functions in the file nx_stm32_eth_driver.c, This Confusing code looks come from ST, not from MS.

[Piranha]

Found some information from ST:

https://wiki.st.com/stm32mcu/wiki/Introduction_to_NETXDUO

The API is developed and documented by Microsoft (Express Logic) anyway. The STM32 driver implementation... Microsoft licenses, Asian names, not a broken bloatware - doesn't seem to be developed by ST either. And indeed...

AUTHOR
Yuxin Zhou, Microsoft Corporation

https://github.com/STMicroelectronics/x-cube-azrtos-f4/blob/2375136d1a1946b7303a02d2fe1958399358c5f6/Middlewares/ST/netxduo/common/drivers/ethernet/nx_stm32_eth_driver.c#L96

Joined Microsoft Azure IoT team through Express Logic acquisition.

https://www.linkedin.com/in/yuxin-zhou-56897a1

Anyway, you have two options:

1. This forum.
2. https://my.st.com/ols

And talking about "experts of ST"...

https://community.st.com/s/question/0D50X0000BOtfhnSQB/how-to-make-ethernet-and-lwip-working-on-stm32