Did someone use DP83848 in RMII mode on custom board?

[Joerg Wagner]

I would like use the DP83848 in RMII mode due to the number of available pins in the project.

LwIP supports DP83848 with MII only and for RMII just the LAN8742A.

The folllowing pins of DP83848 are not connected:

RX_CLK, TX_CLK, RX_DV, COL, RXD_2, RXD_3, TXD_2, TXD_3

But they are listed in the GPIO definition when choosing DP83848 (MII).

Choosing a user PHY in CubeMX5 the registers

MII Interrupt Control Register (0x11) and

MII Interrupt Status Register (0x12) are not available.

The user PHY scheme is similar to LAN8742A.

I don't think to have success using LwIP in CubeMX running DP83848 in RMII mode.

Thank you for any hints.

[Thomas Fischer]

Hello,

I have used a Waveshare Open7xx board with its DP83848 Phy connected over RMII.

I think I have started a project with LAN8742 in RMII mode (cubeMx 4.xx)

It worked with no or minimal changes.