Hi,
I am debugging an issue with infrequently occurring Ethernet RBU's in my own Stm32H723 application and decided to check the official Stm32 ethernet examples to see if they were having the same issue.
I imported the Stm32H723 LwIP_HTTP_Server_Socket_RTOS example and deployed it to my Stm32H723 Nucleo. I placed a breakpoint at HAL_ETH_ErrorCallback at line 565 where the rx sema is released if an rbu occurs. Sure enough, I am seeing RBUs consistently, although the application "works".
ST, surely this example should never be seeing an RBU? I am guessing there is a bug in the ethernet MAC drivers which is also affecting my application, but I'm still trying to understand how the MAC IP block works, so I haven't fully arrived at a reason myself yet. Given the descriptors should be being serviced very quickly by the application in this example, I have a hard time believing that any packets should be lost.
