AM2432: How to support phy DP83822I for CPSW?

Hi Chaowen,

Thank you for your query.

Allow me some time to look into this and get back to you.

Regards,

Nitika

From https://software-dl.ti.com/mcu-plus-sdk/esd/AM243X/latest/exports/docs//enet_migration_guide_top.html#CustomBoardSupport,

 we added dp83822.c/.h and enet_custom_board_config.c into enet_lwip_cpsw project.

DP83822I register information and link status can be obtained through MDIO, but still unable to ping.

What could be the possible reasons for this?

Is there anything we misunderstand?

extPhyMgmt code and sysconfig is attached.

example.rarextPhyMgmt.rar

BR

Chaowen

Hi Chaowen,

What error are you seeing when trying the above? Are you trying to use RGMII interface?

Regards,

Nitika

On DP83822, RCSR register returns 0x0249.

RX FIFO overflow happened.

BR

Chaowen

Hi Chaowen,

FIFO overflow can occur as a result of PPM mismatch on the clocks between the PHY and the MAC. Is it possible to measure and compare the PPM of the input crystals/oscillators for both devices?

Thank you,

Evan