EcuM

How EthTrcv gets from UNINIT to ACTIVE: the state machine, the initialization sequence in the EcuM context, and the key API functions with error handling.

The fourth and final part of the EthTrcv core series: WakeUp handling via PHY pin and in-band signaling, the interplay with EcuM and EthSM, and how to diagnose the most common runtime problems on the transceiver.