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RTOS/AM4377: EtherCAT bus scan fails

Part Number: AM4377
Other Parts Discussed in Thread: SYSBIOS, TLK105L

Tool/software: TI-RTOS

Hello Folks,

I have an AM4377 based custom board based on AM437x IDK.

The custom boards boots up with AM437x sysBIOS based prebult images.(MLO, EtherCAT(app)).

However, when I try to scan the device with EC-Engineer, the bus scan doesnt return the number of slaves(currently 1, the custom board).

The only difference between the AM4377 custom board and IDK is PHY chip.

The IDK has TLK105L PHY where as our custom board had TLK105LR chip.

On IDK, the bus scan succeeds though.

Please help me understand what could be wrong here.

Thanks in advance.

Rohit