I am implementing a ZERO COPY COPY driver for the STM32H7 eth module using PHY DP83825i. Something is strange, the communication stop every 9 seconds for 1 to 2 seconds. but it seem to be at the low level (hardware).

[ARoye.1]

 Even on the Iperf client, there is a dip in transmission bandwidth and we can see the router lights, they all goes off with few ARP request. We are using FreeRTOS+TCP. we have another module using LWIP on other PHY + CPU combination and working without the gap...

Not looking for software problem, just wondering if there is a configuration on the ETH ort PHY that i've missed!

[ARoye.1]

forget this... look like an rtos issues..

[alister]

After you've sorted out the PHY, refer https://community.st.com/s/question/0D50X0000C6eNNSSQ2/bug-fixes-stm32h7-ethernet.

If you use the changes I'd posted, please post your observations there, and especially any problems or improvements.