...
Pointer to variable that will receive the error code from this function:
NET_ARP_ERR_NONE
NET_ARP_ERR_NULL_PTR
NET_ARP_ERR_INVALID_HW_ADDR_LEN
NET_ARP_ERR_INVALID_PROTOCOL_ADDR_LEN
NET_ARP_ERR_CACHE_NOT_FOUND
NET_ARP_ERR_CACHE_PEND
Returned Value
Length of returned hardware address, if available;
...
Available only if an appropriate network interface layer is present (e.g., Ethernet; see section D-7-3).
Notes / Warnings
NetARP_CacheGetAddrHW() may be used in conjunction with NetARP_ProbeAddrOnNet() to determine if a specific protocol address is available on the local network.