ChibiOS Free Embedded RTOS

This is on H735, macv2

Do you have a MACv1 board to try? (anything except H7).

Not sure how to test this.

Giovanni

I might have an F4 based board, but it’s entirely different board (same PHY however)
I could also test on h735 discovery board to rule out HW. This one has different PHY as well.

Wrote a little testapp that just blocks on a receive and then responds with a message.
Wireshark shows that this works perfectly fine on the h735 discovery board, but shows the same delay issue on my board. Only difference is the phy (DP83848I vs LAN8742A)
I’m thinking hardware issue, but strangely it only affects the receive.

The PHY could require some extra initialization.

Giovanni