TM4C129XNCZAD: Programming MAC-ID in Tiva

//! Sets the MAC address of the Ethernet controller.
//!
//! \param ui32Base is the base address of the Ethernet controller.
//! \param ui32Index is the zero-based index of the MAC address to set.
//! \param pui8MACAddr is the pointer to the array of MAC-48 address octets.
//!
//! This function programs the IEEE-defined MAC-48 address specified in
//! \e pui8MACAddr into the Ethernet controller.  This address is used by the
//! Ethernet controller for hardware-level filtering of incoming Ethernet
//! packets (when promiscuous mode is not enabled).  Index 0 is used to hold
//! the local node's MAC address which is inserted into all transmitted
//! packets.
//!
//! The controller may support several Ethernet MAC address slots, each of which
//! may be programmed independently and used to filter incoming packets.  The
//! number of MAC addresses that the hardware supports may be queried using a
//! call to EMACNumAddrGet().  The value of the \e ui32Index parameter must
//! lie in the range from 0 to (number of MAC addresses - 1) inclusive.
//!
//! The MAC-48 address is defined as 6 octets, illustrated by the following
//! example address.  The numbers are shown in hexadecimal format.
//!
//!         AC-DE-48-00-00-80
//!
//! In this representation, the first three octets (AC-DE-48) are the
//! Organizationally Unique Identifier (OUI).  This is a number assigned by
//! the IEEE to an organization that requests a block of MAC addresses.  The
//! last three octets (00-00-80) are a 24-bit number managed by the OUI owner
//! to uniquely identify a piece of hardware within that organization that is
//! to be connected to the Ethernet.
//!
//! In this representation, the octets are transmitted from left to right,
//! with the ``AC'' octet being transmitted first and the ``80'' octet being
//! transmitted last.  Within an octet, the bits are transmitted LSB to MSB.
//! For this address, the first bit to be transmitted would be ``0'', the LSB
//! of ``AC'', and the last bit to be transmitted would be ``1'', the MSB of
//! ``80''.
//!
//! The address passed to this function in the \e pui8MACAddr array is
//! ordered with the first byte to be transmitted in the first array entry.
//! For example, the address given above could be represented using the
//! following array:
//!
//! uint8_t g_pui8MACAddr[] = { 0xAC, 0xDE, 0x48, 0x00, 0x00, 0x80 };
//!
//! If the MAC address set by this function is currently enabled, it remains
//! enabled following this call.  Similarly, any filter configured for
//! the MAC address remains unaffected by a change in the address.