hi,kevin999
The Eth_internalLoopback_S32G274A_M7 routine is used to transmit and receive in internal loopback. This routine does not include all network functions.
However, you can refer to the document GMACSUBSYSRM.pdf to modify and obtain the status of registers such as MAC_PHYIF_Control_Status and MAC_PMT_Control_Status. Achieve Get Link State, Get Wakeup Mode and other functions.
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Hope it can help you.
BR
Joey