STM32F750 ETHERNET RMII not working

[arun singh]

So I have this STM32F750 Discovery board with RMII Ethernet connection and I have another H745 Discovery with MII Ethernet.

I am trying the same project in both of them, and it's working in MII but not in RMII.

I tried every possible solution I can think of, like the MPU configurations, different memory locations for the DMA Descriptors, with/without RTOS, but never got it working with the RMII.

The code executes fine, the Tx Buffer is updating fine, but somehow the connection is not working.

 

[arun singh · Accepted solution]

Got it Working.

In Ethernet configuration, PHY Address should be set to 0.