Overview

The MCUXpresso SDK provides a peripheral driver for the 10/100 Mbps Ethernet MAC (ENET) module of MCUXpresso SDK devices.

ENET: Ethernet MAC Driver {EthernetMACDriver}

Operations of Ethernet MAC Driver

MII interface Operation

The MII interface is the interface connected with MAC and PHY. the Serial management interface - MII management interface should be set before any access to the external PHY chip register. Call ENET_SetSMI() to initialize the MII management interface. Use ENET_StartSMIRead(), ENET_StartSMIWrite(), and ENET_ReadSMIData() to read/write to PHY registers. This function group sets up the MII and serial management SMI interface, gets data from the SMI interface, and starts the SMI read and write command. Use ENET_SetMII() to configure the MII before successfully getting data from the external PHY.

MAC address filter

This group sets/gets the ENET mac address and the multicast group address filter. ENET_AddMulticastGroup() should be called to add the ENET MAC to the multicast group. The IEEE 1588 feature requires receiving the PTP message.

Other Baisc control Operations

This group has the receive active API ENET_ActiveRead() for single and multiple rings. The ENET_AVBConfigure() is provided to configure the AVB features to support the AVB frames transmission. Note that due to the AVB frames transmission scheme being a credit-based TX scheme, it is only supported with the Enhanced buffer descriptors. Because of this, the AVB configuration should only be done with the Enhanced buffer descriptor. When the AVB feature is required, make sure the the "ENET_ENHANCEDBUFFERDESCRIPTOR_MODE" is defined before using this feature.

Transactional Operation

For ENET receive, the ENET_GetRxFrameSize() function needs to be called to get the received data size. Then, call the ENET_ReadFrame() function to get the received data. If the received error occurs, call the ENET_GetRxErrBeforeReadFrame() function after ENET_GetRxFrameSize() and before ENET_ReadFrame() functions to get the detailed error information.

For ENET transmit, call the ENET_SendFrame() function to send the data out. The transmit data error information is only accessible for the IEEE 1588 enhanced buffer descriptor mode. When the ENET_ENHANCEDBUFFERDESCRIPTOR_MODE is defined, the ENET_GetTxErrAfterSendFrame() can be used to get the detail transmit error information. The transmit error information can only be updated by uDMA after the data is transmitted. The ENET_GetTxErrAfterSendFrame() function is recommended to be called on the transmit interrupt handler.

If send/read frame with zero-copy mechanism is needed, there're special APIs like ENET_GetRxBuffer(), ENET_ReleaseRxBuffer(), ENET_SendFrameZeroCopy() and ENET_SetTxBuffer(). The send frame zero-copy APIs can't be used mixed with ENET_SendFrame() for the same ENET peripheral, same as read frame zero-copy APIs.

PTP IEEE 1588 Feature Operation

This function group configures the PTP IEEE 1588 feature, starts/stops/gets/sets/adjusts the PTP IEEE 1588 timer, gets the receive/transmit frame timestamp, and PTP IEEE 1588 timer channel feature setting.

The ENET_Ptp1588Configure() function needs to be called when the ENET_ENHANCEDBUFFERDESCRIPTOR_MODE is defined and the IEEE 1588 feature is required.

Typical use case

ENET Initialization, receive, and transmit operations

For the ENET_ENHANCEDBUFFERDESCRIPTOR_MODE undefined use case, use the legacy type buffer descriptor transmit/receive the frame as follows. Refer to the driver examples codes located at <SDK_ROOT>/boards/<BOARD>/driver_examples/enet For the ENET_ENHANCEDBUFFERDESCRIPTOR_MODE defined use case, add the PTP IEEE 1588 configuration to enable the PTP IEEE 1588 feature. The initialization occurs as follows. Refer to the driver examples codes located at <SDK_ROOT>/boards/<BOARD>/driver_examples/enet

Modules
	ENET CMSIS Driver

Data Structures
struct	enet_rx_bd_struct_t
	Defines the receive buffer descriptor structure for the little endian system. More...

struct	enet_tx_bd_struct_t
	Defines the enhanced transmit buffer descriptor structure for the little endian system. More...

struct	enet_data_error_stats_t
	Defines the ENET data error statistics structure. More...

struct	enet_frame_info_t
	Defines the frame info structure. More...

struct	enet_tx_dirty_ring_t
	Defines the ENET transmit dirty addresses ring/queue structure. More...

struct	enet_buffer_config_t
	Defines the receive buffer descriptor configuration structure. More...

struct	enet_intcoalesce_config_t
	Defines the interrupt coalescing configure structure. More...

struct	enet_config_t
	Defines the basic configuration structure for the ENET device. More...

struct	enet_tx_bd_ring_t
	Defines the ENET transmit buffer descriptor ring/queue structure. More...

struct	enet_rx_bd_ring_t
	Defines the ENET receive buffer descriptor ring/queue structure. More...

struct	enet_handle_t
	Defines the ENET handler structure. More...

Macros
#define	ENET_BUFFDESCRIPTOR_RX_ERR_MASK
	Defines the receive error status flag mask. More...

Typedefs
typedef void(*	enet_callback_t )(ENET_Type base, enet_handle_t handle, enet_event_t event, enet_frame_info_t frameInfo, void userData)
	ENET callback function. More...

typedef void(*	enet_isr_t )(ENET_Type base, enet_handle_t handle)
	Define interrupt IRQ handler. More...

Enumerations
enum	{ kStatus_ENET_RxFrameError = MAKE_STATUS(kStatusGroup_ENET, 0U), kStatus_ENET_RxFrameFail = MAKE_STATUS(kStatusGroup_ENET, 1U), kStatus_ENET_RxFrameEmpty = MAKE_STATUS(kStatusGroup_ENET, 2U), kStatus_ENET_TxFrameOverLen = MAKE_STATUS(kStatusGroup_ENET, 3U), kStatus_ENET_TxFrameBusy = MAKE_STATUS(kStatusGroup_ENET, 4U), kStatus_ENET_TxFrameFail = MAKE_STATUS(kStatusGroup_ENET, 5U) }
	Defines the status return codes for transaction. More...

enum	enet_mii_mode_t { kENET_MiiMode = 0U, kENET_RmiiMode = 1U }
	Defines the MII/RMII/RGMII mode for data interface between the MAC and the PHY. More...

enum	enet_mii_speed_t { kENET_MiiSpeed10M = 0U, kENET_MiiSpeed100M = 1U }
	Defines the 10/100/1000 Mbps speed for the MII data interface. More...

enum	enet_mii_duplex_t { kENET_MiiHalfDuplex = 0U, kENET_MiiFullDuplex }
	Defines the half or full duplex for the MII data interface. More...

enum	enet_mii_write_t { kENET_MiiWriteNoCompliant = 0U, kENET_MiiWriteValidFrame }
	Define the MII opcode for normal MDIO_CLAUSES_22 Frame. More...

enum	enet_mii_read_t { kENET_MiiReadValidFrame = 2U, kENET_MiiReadNoCompliant = 3U }
	Defines the read operation for the MII management frame. More...

enum	enet_mii_extend_opcode { kENET_MiiAddrWrite_C45 = 0U, kENET_MiiWriteFrame_C45 = 1U, kENET_MiiReadFrame_C45 = 3U }
	Define the MII opcode for extended MDIO_CLAUSES_45 Frame. More...

enum	enet_special_control_flag_t { kENET_ControlFlowControlEnable = 0x0001U, kENET_ControlRxPayloadCheckEnable = 0x0002U, kENET_ControlRxPadRemoveEnable = 0x0004U, kENET_ControlRxBroadCastRejectEnable = 0x0008U, kENET_ControlMacAddrInsert = 0x0010U, kENET_ControlStoreAndFwdDisable = 0x0020U, kENET_ControlSMIPreambleDisable = 0x0040U, kENET_ControlPromiscuousEnable = 0x0080U, kENET_ControlMIILoopEnable = 0x0100U, kENET_ControlVLANTagEnable = 0x0200U }
	Defines a special configuration for ENET MAC controller. More...

enum	enet_interrupt_enable_t { kENET_BabrInterrupt = ENET_EIR_BABR_MASK, kENET_BabtInterrupt = ENET_EIR_BABT_MASK, kENET_GraceStopInterrupt = ENET_EIR_GRA_MASK, kENET_TxFrameInterrupt = ENET_EIR_TXF_MASK, kENET_TxBufferInterrupt = ENET_EIR_TXB_MASK, kENET_RxFrameInterrupt = ENET_EIR_RXF_MASK, kENET_RxBufferInterrupt = ENET_EIR_RXB_MASK, kENET_MiiInterrupt = ENET_EIR_MII_MASK, kENET_EBusERInterrupt = ENET_EIR_EBERR_MASK, kENET_LateCollisionInterrupt = ENET_EIR_LC_MASK, kENET_RetryLimitInterrupt = ENET_EIR_RL_MASK, kENET_UnderrunInterrupt = ENET_EIR_UN_MASK, kENET_PayloadRxInterrupt = ENET_EIR_PLR_MASK, kENET_WakeupInterrupt = ENET_EIR_WAKEUP_MASK, kENET_TsAvailInterrupt = ENET_EIR_TS_AVAIL_MASK, kENET_TsTimerInterrupt = ENET_EIR_TS_TIMER_MASK }
	List of interrupts supported by the peripheral. More...

enum	enet_event_t { kENET_RxEvent, kENET_TxEvent, kENET_ErrEvent, kENET_WakeUpEvent, kENET_TimeStampEvent, kENET_TimeStampAvailEvent }
	Defines the common interrupt event for callback use. More...

enum	enet_tx_accelerator_t { kENET_TxAccelIsShift16Enabled = ENET_TACC_SHIFT16_MASK, kENET_TxAccelIpCheckEnabled = ENET_TACC_IPCHK_MASK, kENET_TxAccelProtoCheckEnabled = ENET_TACC_PROCHK_MASK }
	Defines the transmit accelerator configuration. More...

enum	enet_rx_accelerator_t { kENET_RxAccelPadRemoveEnabled = ENET_RACC_PADREM_MASK, kENET_RxAccelIpCheckEnabled = ENET_RACC_IPDIS_MASK, kENET_RxAccelProtoCheckEnabled = ENET_RACC_PRODIS_MASK, kENET_RxAccelMacCheckEnabled = ENET_RACC_LINEDIS_MASK, kENET_RxAccelisShift16Enabled = ENET_RACC_SHIFT16_MASK }
	Defines the receive accelerator configuration. More...

Functions
uint32_t	ENET_GetInstance (ENET_Type *base)
	Get the ENET instance from peripheral base address. More...

Driver version
#define	FSL_ENET_DRIVER_VERSION (MAKE_VERSION(2, 3, 0))
	Defines the driver version. More...

Control and status region bit masks of the receive buffer descriptor.
Defines the queue number.
#define	ENET_BUFFDESCRIPTOR_RX_EMPTY_MASK 0x8000U
	Empty bit mask. More...

#define	ENET_BUFFDESCRIPTOR_RX_SOFTOWNER1_MASK 0x4000U
	Software owner one mask. More...

#define	ENET_BUFFDESCRIPTOR_RX_WRAP_MASK 0x2000U
	Next buffer descriptor is the start address. More...

#define	ENET_BUFFDESCRIPTOR_RX_SOFTOWNER2_Mask 0x1000U
	Software owner two mask. More...

#define	ENET_BUFFDESCRIPTOR_RX_LAST_MASK 0x0800U
	Last BD of the frame mask. More...

#define	ENET_BUFFDESCRIPTOR_RX_MISS_MASK 0x0100U
	Received because of the promiscuous mode. More...

#define	ENET_BUFFDESCRIPTOR_RX_BROADCAST_MASK 0x0080U
	Broadcast packet mask. More...

#define	ENET_BUFFDESCRIPTOR_RX_MULTICAST_MASK 0x0040U
	Multicast packet mask. More...

#define	ENET_BUFFDESCRIPTOR_RX_LENVLIOLATE_MASK 0x0020U
	Length violation mask. More...

#define	ENET_BUFFDESCRIPTOR_RX_NOOCTET_MASK 0x0010U
	Non-octet aligned frame mask. More...

#define	ENET_BUFFDESCRIPTOR_RX_CRC_MASK 0x0004U
	CRC error mask. More...

#define	ENET_BUFFDESCRIPTOR_RX_OVERRUN_MASK 0x0002U
	FIFO overrun mask. More...

#define	ENET_BUFFDESCRIPTOR_RX_TRUNC_MASK 0x0001U
	Frame is truncated mask. More...

Control and status bit masks of the transmit buffer descriptor.
#define	ENET_BUFFDESCRIPTOR_TX_READY_MASK 0x8000U
	Ready bit mask. More...

#define	ENET_BUFFDESCRIPTOR_TX_SOFTOWENER1_MASK 0x4000U
	Software owner one mask. More...

#define	ENET_BUFFDESCRIPTOR_TX_WRAP_MASK 0x2000U
	Wrap buffer descriptor mask. More...

#define	ENET_BUFFDESCRIPTOR_TX_SOFTOWENER2_MASK 0x1000U
	Software owner two mask. More...

#define	ENET_BUFFDESCRIPTOR_TX_LAST_MASK 0x0800U
	Last BD of the frame mask. More...

#define	ENET_BUFFDESCRIPTOR_TX_TRANMITCRC_MASK 0x0400U
	Transmit CRC mask. More...

Defines some Ethernet parameters.
#define	ENET_FRAME_MAX_FRAMELEN 1518U
	Default maximum Ethernet frame size. More...

#define	ENET_FIFO_MIN_RX_FULL 5U
	ENET minimum receive FIFO full. More...

#define	ENET_RX_MIN_BUFFERSIZE 256U
	ENET minimum buffer size. More...

#define	ENET_PHY_MAXADDRESS (ENET_MMFR_PA_MASK >> ENET_MMFR_PA_SHIFT)
	Maximum PHY address. More...

#define	ENET_TX_INTERRUPT ((uint32_t)kENET_TxFrameInterrupt \| (uint32_t)kENET_TxBufferInterrupt)
	Enet Tx interrupt flag. More...

#define	ENET_RX_INTERRUPT ((uint32_t)kENET_RxFrameInterrupt \| (uint32_t)kENET_RxBufferInterrupt)
	Enet Rx interrupt flag. More...

#define	ENET_TS_INTERRUPT ((uint32_t)kENET_TsTimerInterrupt \| (uint32_t)kENET_TsAvailInterrupt)
	Enet timestamp interrupt flag. More...

#define	ENET_ERR_INTERRUPT
	Enet error interrupt flag. More...

Defines Tx operation flags.
#define	ENET_TX_LAST_BD_FLAG 0x01U
	Tx set last buffer descriptor flag. More...

#define	ENET_TX_TIMESTAMP_FLAG 0x02U
	Tx timestamp flag. More...

Initialization and De-initialization
void	ENET_GetDefaultConfig (enet_config_t *config)
	Gets the ENET default configuration structure. More...

void	ENET_Up (ENET_Type base, enet_handle_t handle, const enet_config_t config, const enet_buffer_config_t bufferConfig, uint8_t *macAddr, uint32_t srcClock_Hz)
	Initializes the ENET module. More...

void	ENET_Init (ENET_Type base, enet_handle_t handle, const enet_config_t config, const enet_buffer_config_t bufferConfig, uint8_t *macAddr, uint32_t srcClock_Hz)
	Initializes the ENET module. More...

void	ENET_Down (ENET_Type *base)
	Stops the ENET module. More...

void	ENET_Deinit (ENET_Type *base)
	Deinitializes the ENET module. More...

static void	ENET_Reset (ENET_Type *base)
	Resets the ENET module. More...

MII interface operation
void	ENET_SetMII (ENET_Type *base, enet_mii_speed_t speed, enet_mii_duplex_t duplex)
	Sets the ENET MII speed and duplex. More...

void	ENET_SetSMI (ENET_Type *base, uint32_t srcClock_Hz, bool isPreambleDisabled)
	Sets the ENET SMI(serial management interface)- MII management interface. More...

static bool	ENET_GetSMI (ENET_Type *base)
	Gets the ENET SMI- MII management interface configuration. More...

static uint32_t	ENET_ReadSMIData (ENET_Type *base)
	Reads data from the PHY register through an SMI interface. More...

void	ENET_StartSMIRead (ENET_Type *base, uint32_t phyAddr, uint32_t phyReg, enet_mii_read_t operation)
	Starts an SMI (Serial Management Interface) read command. More...

void	ENET_StartSMIWrite (ENET_Type *base, uint32_t phyAddr, uint32_t phyReg, enet_mii_write_t operation, uint32_t data)
	Starts an SMI write command. More...

void	ENET_StartExtC45SMIRead (ENET_Type *base, uint32_t phyAddr, uint32_t phyReg)
	Starts the extended IEEE802.3 Clause 45 MDIO format SMI read command. More...

void	ENET_StartExtC45SMIWrite (ENET_Type *base, uint32_t phyAddr, uint32_t phyReg, uint32_t data)
	Starts the extended IEEE802.3 Clause 45 MDIO format SMI write command. More...

void	ENET_StartExtC45SMIWriteReg (ENET_Type *base, uint32_t phyAddr, uint32_t phyReg)
	Starts the extended IEEE802.3 Clause 45 MDIO format SMI write register command. More...

void	ENET_StartExtC45SMIWriteData (ENET_Type *base, uint32_t phyAddr, uint32_t phyReg, uint32_t data)
	Starts the extended IEEE802.3 Clause 45 MDIO format SMI write data command. More...

void	ENET_StartExtC45SMIReadData (ENET_Type *base, uint32_t phyAddr, uint32_t phyReg)
	Starts the extended IEEE802.3 Clause 45 MDIO format SMI read data command. More...

MAC Address Filter
void	ENET_SetMacAddr (ENET_Type base, uint8_t macAddr)
	Sets the ENET module Mac address. More...

void	ENET_GetMacAddr (ENET_Type base, uint8_t macAddr)
	Gets the ENET module Mac address. More...

void	ENET_AddMulticastGroup (ENET_Type base, uint8_t address)
	Adds the ENET device to a multicast group. More...

void	ENET_LeaveMulticastGroup (ENET_Type base, uint8_t address)
	Moves the ENET device from a multicast group. More...

Other basic operation
static void	ENET_ActiveRead (ENET_Type *base)
	Activates ENET read or receive. More...

static void	ENET_EnableSleepMode (ENET_Type *base, bool enable)
	Enables/disables the MAC to enter sleep mode. More...

static void	ENET_GetAccelFunction (ENET_Type base, uint32_t txAccelOption, uint32_t *rxAccelOption)
	Gets ENET transmit and receive accelerator functions from MAC controller. More...

Interrupts.
static void	ENET_EnableInterrupts (ENET_Type *base, uint32_t mask)
	Enables the ENET interrupt. More...

static void	ENET_DisableInterrupts (ENET_Type *base, uint32_t mask)
	Disables the ENET interrupt. More...

static uint32_t	ENET_GetInterruptStatus (ENET_Type *base)
	Gets the ENET interrupt status flag. More...

static void	ENET_ClearInterruptStatus (ENET_Type *base, uint32_t mask)
	Clears the ENET interrupt events status flag. More...

void	ENET_SetRxISRHandler (ENET_Type *base, enet_isr_t ISRHandler)
	Set the second level Rx IRQ handler. More...

void	ENET_SetTxISRHandler (ENET_Type *base, enet_isr_t ISRHandler)
	Set the second level Tx IRQ handler. More...

void	ENET_SetErrISRHandler (ENET_Type *base, enet_isr_t ISRHandler)
	Set the second level Err IRQ handler. More...

Transactional operation
void	ENET_SetCallback (enet_handle_t handle, enet_callback_t callback, void userData)
	Sets the callback function. More...

void	ENET_GetRxErrBeforeReadFrame (enet_handle_t handle, enet_data_error_stats_t eErrorStatic, uint8_t ringId)
	Gets the error statistics of a received frame for ENET specified ring. More...

status_t	ENET_GetRxFrameSize (enet_handle_t handle, uint32_t length, uint8_t ringId)
	Gets the size of the read frame for specified ring. More...

status_t	ENET_ReadFrame (ENET_Type base, enet_handle_t handle, uint8_t data, uint32_t length, uint8_t ringId, uint32_t ts)
	Reads a frame from the ENET device. More...

status_t	ENET_SendFrame (ENET_Type base, enet_handle_t handle, const uint8_t data, uint32_t length, uint8_t ringId, bool tsFlag, void context)
	Transmits an ENET frame for specified ring. More...

status_t	ENET_SetTxReclaim (enet_handle_t *handle, bool isEnable, uint8_t ringId)
	Enable or disable tx descriptors reclaim mechanism. More...

status_t	ENET_GetRxBuffer (ENET_Type base, enet_handle_t handle, void *buffer, uint32_t length, uint8_t ringId, bool isLastBuff, uint32_t ts)
	Get a receive buffer pointer of the ENET device for specified ring. More...

void	ENET_ReleaseRxBuffer (ENET_Type base, enet_handle_t handle, void *buffer, uint8_t ringId)
	Release receive buffer descriptor to DMA. More...

status_t	ENET_SendFrameZeroCopy (ENET_Type base, enet_handle_t handle, const uint8_t data, uint32_t length, uint8_t ringId, bool tsFlag, void context)
	Transmits an ENET frame for specified ring with zero-copy. More...

status_t	ENET_SetTxBuffer (ENET_Type base, enet_handle_t handle, const uint8_t data, uint32_t length, uint8_t ringId, uint8_t txFlag, void context)
	Set up ENET Tx buffer descriptor, preparing for one frame stores in scattered buffer. More...

void	ENET_TransmitIRQHandler (ENET_Type base, enet_handle_t handle)
	The transmit IRQ handler. More...

void	ENET_ReceiveIRQHandler (ENET_Type base, enet_handle_t handle)
	The receive IRQ handler. More...

void	ENET_ErrorIRQHandler (ENET_Type base, enet_handle_t handle)
	Some special IRQ handler including the error, mii, wakeup irq handler. More...

void	ENET_CommonFrame0IRQHandler (ENET_Type *base)
	the common IRQ handler for the tx/rx/error etc irq handler. More...

Data Structure Documentation

struct enet_rx_bd_struct_t

Data Fields
uint16_t	length
	Buffer descriptor data length. More...

uint16_t	control
	Buffer descriptor control and status. More...

uint8_t *	buffer
	Data buffer pointer. More...

Field Documentation

uint16_t enet_rx_bd_struct_t::length

uint16_t enet_rx_bd_struct_t::control

uint8_t* enet_rx_bd_struct_t::buffer

struct enet_tx_bd_struct_t

Data Fields
uint16_t	length
	Buffer descriptor data length. More...

uint16_t	control
	Buffer descriptor control and status. More...

uint8_t *	buffer
	Data buffer pointer. More...

Field Documentation

uint16_t enet_tx_bd_struct_t::length

uint16_t enet_tx_bd_struct_t::control

uint8_t* enet_tx_bd_struct_t::buffer

struct enet_data_error_stats_t

Data Fields
uint32_t	statsRxLenGreaterErr
	Receive length greater than RCR[MAX_FL]. More...

uint32_t	statsRxAlignErr
	Receive non-octet alignment/.

uint32_t	statsRxFcsErr
	Receive CRC error. More...

uint32_t	statsRxOverRunErr
	Receive over run. More...

uint32_t	statsRxTruncateErr
	Receive truncate. More...

Field Documentation

uint32_t enet_data_error_stats_t::statsRxLenGreaterErr

uint32_t enet_data_error_stats_t::statsRxFcsErr

uint32_t enet_data_error_stats_t::statsRxOverRunErr

uint32_t enet_data_error_stats_t::statsRxTruncateErr

struct enet_frame_info_t

Data Fields
void *	context
	User specified data.

struct enet_tx_dirty_ring_t

Data Fields
enet_frame_info_t *	txDirtyBase
	Dirty buffer descriptor base address pointer. More...

uint16_t	txGenIdx
	tx generate index. More...

uint16_t	txConsumIdx
	tx consume index. More...

uint16_t	txRingLen
	tx ring length. More...

bool	isFull
	tx ring is full flag. More...

Field Documentation

enet_frame_info_t* enet_tx_dirty_ring_t::txDirtyBase

uint16_t enet_tx_dirty_ring_t::txGenIdx

uint16_t enet_tx_dirty_ring_t::txConsumIdx

uint16_t enet_tx_dirty_ring_t::txRingLen

bool enet_tx_dirty_ring_t::isFull

struct enet_buffer_config_t

Note that for the internal DMA requirements, the buffers have a corresponding alignment requirements.

The aligned receive and transmit buffer size must be evenly divisible by ENET_BUFF_ALIGNMENT. when the data buffers are in cacheable region when cache is enabled, all those size should be aligned to the maximum value of "ENET_BUFF_ALIGNMENT" and the cache line size.
The aligned transmit and receive buffer descriptor start address must be at least 64 bit aligned. However, it's recommended to be evenly divisible by ENET_BUFF_ALIGNMENT. buffer descriptors should be put in non-cacheable region when cache is enabled.
The aligned transmit and receive data buffer start address must be evenly divisible by ENET_BUFF_ALIGNMENT. Receive buffers should be continuous with the total size equal to "rxBdNumber * rxBuffSizeAlign". Transmit buffers should be continuous with the total size equal to "txBdNumber * txBuffSizeAlign". when the data buffers are in cacheable region when cache is enabled, all those size should be aligned to the maximum value of "ENET_BUFF_ALIGNMENT" and the cache line size.

Data Fields
uint16_t	rxBdNumber
	Receive buffer descriptor number. More...

uint16_t	txBdNumber
	Transmit buffer descriptor number. More...

uint16_t	rxBuffSizeAlign
	Aligned receive data buffer size. More...

uint16_t	txBuffSizeAlign
	Aligned transmit data buffer size. More...

volatile enet_rx_bd_struct_t *	rxBdStartAddrAlign
	Aligned receive buffer descriptor start address: should be non-cacheable. More...

volatile enet_tx_bd_struct_t *	txBdStartAddrAlign
	Aligned transmit buffer descriptor start address: should be non-cacheable. More...

uint8_t *	rxBufferAlign
	Receive data buffer start address. More...

uint8_t *	txBufferAlign
	Transmit data buffer start address. More...

bool	rxMaintainEnable
	Receive buffer cache maintain. More...

bool	txMaintainEnable
	Transmit buffer cache maintain. More...

enet_frame_info_t *	txFrameInfo
	Transmit frame information start address. More...

Field Documentation

uint16_t enet_buffer_config_t::rxBdNumber

uint16_t enet_buffer_config_t::txBdNumber

uint16_t enet_buffer_config_t::rxBuffSizeAlign

uint16_t enet_buffer_config_t::txBuffSizeAlign

volatile enet_rx_bd_struct_t* enet_buffer_config_t::rxBdStartAddrAlign

volatile enet_tx_bd_struct_t* enet_buffer_config_t::txBdStartAddrAlign

uint8_t* enet_buffer_config_t::rxBufferAlign

uint8_t* enet_buffer_config_t::txBufferAlign

bool enet_buffer_config_t::rxMaintainEnable

bool enet_buffer_config_t::txMaintainEnable

enet_frame_info_t* enet_buffer_config_t::txFrameInfo

struct enet_intcoalesce_config_t

Data Fields
uint8_t	txCoalesceFrameCount [FSL_FEATURE_ENET_QUEUE]
	Transmit interrupt coalescing frame count threshold. More...

uint16_t	txCoalesceTimeCount [FSL_FEATURE_ENET_QUEUE]
	Transmit interrupt coalescing timer count threshold. More...

uint8_t	rxCoalesceFrameCount [FSL_FEATURE_ENET_QUEUE]
	Receive interrupt coalescing frame count threshold. More...

uint16_t	rxCoalesceTimeCount [FSL_FEATURE_ENET_QUEUE]
	Receive interrupt coalescing timer count threshold. More...

Field Documentation

uint8_t enet_intcoalesce_config_t::txCoalesceFrameCount[FSL_FEATURE_ENET_QUEUE]

uint16_t enet_intcoalesce_config_t::txCoalesceTimeCount[FSL_FEATURE_ENET_QUEUE]

uint8_t enet_intcoalesce_config_t::rxCoalesceFrameCount[FSL_FEATURE_ENET_QUEUE]

uint16_t enet_intcoalesce_config_t::rxCoalesceTimeCount[FSL_FEATURE_ENET_QUEUE]

struct enet_config_t

Note:

macSpecialConfig is used for a special control configuration, A logical OR of "enet_special_control_flag_t". For a special configuration for MAC, set this parameter to 0.
txWatermark is used for a cut-through operation. It is in steps of 64 bytes: 0/1 - 64 bytes written to TX FIFO before transmission of a frame begins. 2 - 128 bytes written to TX FIFO .... 3 - 192 bytes written to TX FIFO .... The maximum of txWatermark is 0x2F - 4032 bytes written to TX FIFO .... txWatermark allows minimizing the transmit latency to set the txWatermark to 0 or 1 or for larger bus access latency 3 or larger due to contention for the system bus.
rxFifoFullThreshold is similar to the txWatermark for cut-through operation in RX. It is in 64-bit words. The minimum is ENET_FIFO_MIN_RX_FULL and the maximum is 0xFF. If the end of the frame is stored in FIFO and the frame size if smaller than the txWatermark, the frame is still transmitted. The rule is the same for rxFifoFullThreshold in the receive direction.
When "kENET_ControlFlowControlEnable" is set in the macSpecialConfig, ensure that the pauseDuration, rxFifoEmptyThreshold, and rxFifoStatEmptyThreshold are set for flow control enabled case.
When "kENET_ControlStoreAndFwdDisabled" is set in the macSpecialConfig, ensure that the rxFifoFullThreshold and txFifoWatermark are set for store and forward disable.
The rxAccelerConfig and txAccelerConfig default setting with 0 - accelerator are disabled. The "enet_tx_accelerator_t" and "enet_rx_accelerator_t" are recommended to be used to enable the transmit and receive accelerator. After the accelerators are enabled, the store and forward feature should be enabled. As a result, kENET_ControlStoreAndFwdDisabled should not be set.
The intCoalesceCfg can be used in the rx or tx enabled cases to decrese the CPU loading.

Data Fields
uint32_t	macSpecialConfig
	Mac special configuration. More...

uint32_t	interrupt
	Mac interrupt source. More...

uint16_t	rxMaxFrameLen
	Receive maximum frame length. More...

enet_mii_mode_t	miiMode
	MII mode. More...

enet_mii_speed_t	miiSpeed
	MII Speed. More...

enet_mii_duplex_t	miiDuplex
	MII duplex. More...

uint8_t	rxAccelerConfig
	Receive accelerator, A logical OR of "enet_rx_accelerator_t". More...

uint8_t	txAccelerConfig
	Transmit accelerator, A logical OR of "enet_rx_accelerator_t". More...

uint16_t	pauseDuration
	For flow control enabled case: Pause duration. More...

uint8_t	rxFifoEmptyThreshold
	For flow control enabled case: when RX FIFO level reaches this value, it makes MAC generate XOFF pause frame. More...

uint8_t	rxFifoFullThreshold
	For store and forward disable case, the data required in RX FIFO to notify the MAC receive ready status. More...

uint8_t	txFifoWatermark
	For store and forward disable case, the data required in TX FIFO before a frame transmit start. More...

enet_intcoalesce_config_t *	intCoalesceCfg
	If the interrupt coalsecence is not required in the ring n(0,1,2), please set to NULL. More...

uint8_t	ringNum
	Number of used rings. More...

Field Documentation

uint32_t enet_config_t::macSpecialConfig

A logical OR of "enet_special_control_flag_t".

uint32_t enet_config_t::interrupt

A logical OR of "enet_interrupt_enable_t".

uint16_t enet_config_t::rxMaxFrameLen

enet_mii_mode_t enet_config_t::miiMode

enet_mii_speed_t enet_config_t::miiSpeed

enet_mii_duplex_t enet_config_t::miiDuplex

uint8_t enet_config_t::rxAccelerConfig

uint8_t enet_config_t::txAccelerConfig

uint16_t enet_config_t::pauseDuration

uint8_t enet_config_t::rxFifoEmptyThreshold

uint8_t enet_config_t::rxFifoFullThreshold

uint8_t enet_config_t::txFifoWatermark

enet_intcoalesce_config_t* enet_config_t::intCoalesceCfg

uint8_t enet_config_t::ringNum

default with 1 – single ring.

struct enet_tx_bd_ring_t

Data Fields
volatile enet_tx_bd_struct_t *	txBdBase
	Buffer descriptor base address pointer. More...

uint16_t	txGenIdx
	The current available transmit buffer descriptor pointer. More...

uint16_t	txConsumIdx
	Transmit consume index. More...

volatile uint16_t	txDescUsed
	Transmit descriptor used number. More...

uint16_t	txRingLen
	Transmit ring length. More...

Field Documentation

volatile enet_tx_bd_struct_t* enet_tx_bd_ring_t::txBdBase

uint16_t enet_tx_bd_ring_t::txGenIdx

uint16_t enet_tx_bd_ring_t::txConsumIdx

volatile uint16_t enet_tx_bd_ring_t::txDescUsed

uint16_t enet_tx_bd_ring_t::txRingLen

struct enet_rx_bd_ring_t

Data Fields
volatile enet_rx_bd_struct_t *	rxBdBase
	Buffer descriptor base address pointer. More...

uint16_t	rxGenIdx
	The current available receive buffer descriptor pointer. More...

uint16_t	rxRingLen
	Receive ring length. More...

Field Documentation

volatile enet_rx_bd_struct_t* enet_rx_bd_ring_t::rxBdBase

uint16_t enet_rx_bd_ring_t::rxGenIdx

uint16_t enet_rx_bd_ring_t::rxRingLen

struct _enet_handle

Data Fields
enet_rx_bd_ring_t	rxBdRing [FSL_FEATURE_ENET_QUEUE]
	Receive buffer descriptor. More...

enet_tx_bd_ring_t	txBdRing [FSL_FEATURE_ENET_QUEUE]
	Transmit buffer descriptor. More...

uint16_t	rxBuffSizeAlign [FSL_FEATURE_ENET_QUEUE]
	Receive buffer size alignment. More...

uint16_t	txBuffSizeAlign [FSL_FEATURE_ENET_QUEUE]
	Transmit buffer size alignment. More...

bool	rxMaintainEnable [FSL_FEATURE_ENET_QUEUE]
	Receive buffer cache maintain. More...

bool	txMaintainEnable [FSL_FEATURE_ENET_QUEUE]
	Transmit buffer cache maintain. More...

uint8_t	ringNum
	Number of used rings. More...

enet_callback_t	callback
	Callback function. More...

void *	userData
	Callback function parameter. More...

enet_tx_dirty_ring_t	txDirtyRing [FSL_FEATURE_ENET_QUEUE]
	Ring to store tx frame information. More...

bool	TxReclaimEnable [FSL_FEATURE_ENET_QUEUE]
	Tx reclaim enable flag. More...

Field Documentation

enet_rx_bd_ring_t enet_handle_t::rxBdRing[FSL_FEATURE_ENET_QUEUE]

enet_tx_bd_ring_t enet_handle_t::txBdRing[FSL_FEATURE_ENET_QUEUE]

uint16_t enet_handle_t::rxBuffSizeAlign[FSL_FEATURE_ENET_QUEUE]

uint16_t enet_handle_t::txBuffSizeAlign[FSL_FEATURE_ENET_QUEUE]

bool enet_handle_t::rxMaintainEnable[FSL_FEATURE_ENET_QUEUE]

bool enet_handle_t::txMaintainEnable[FSL_FEATURE_ENET_QUEUE]

uint8_t enet_handle_t::ringNum

enet_callback_t enet_handle_t::callback

void* enet_handle_t::userData

enet_tx_dirty_ring_t enet_handle_t::txDirtyRing[FSL_FEATURE_ENET_QUEUE]

bool enet_handle_t::TxReclaimEnable[FSL_FEATURE_ENET_QUEUE]

Macro Definition Documentation

#define FSL_ENET_DRIVER_VERSION (MAKE_VERSION(2, 3, 0))

Version 2.3.0.

#define ENET_BUFFDESCRIPTOR_RX_EMPTY_MASK 0x8000U

#define ENET_BUFFDESCRIPTOR_RX_SOFTOWNER1_MASK 0x4000U

#define ENET_BUFFDESCRIPTOR_RX_WRAP_MASK 0x2000U

#define ENET_BUFFDESCRIPTOR_RX_SOFTOWNER2_Mask 0x1000U

#define ENET_BUFFDESCRIPTOR_RX_LAST_MASK 0x0800U

#define ENET_BUFFDESCRIPTOR_RX_MISS_MASK 0x0100U

#define ENET_BUFFDESCRIPTOR_RX_BROADCAST_MASK 0x0080U

#define ENET_BUFFDESCRIPTOR_RX_MULTICAST_MASK 0x0040U

#define ENET_BUFFDESCRIPTOR_RX_LENVLIOLATE_MASK 0x0020U

#define ENET_BUFFDESCRIPTOR_RX_NOOCTET_MASK 0x0010U

#define ENET_BUFFDESCRIPTOR_RX_CRC_MASK 0x0004U

#define ENET_BUFFDESCRIPTOR_RX_OVERRUN_MASK 0x0002U

#define ENET_BUFFDESCRIPTOR_RX_TRUNC_MASK 0x0001U

#define ENET_BUFFDESCRIPTOR_TX_READY_MASK 0x8000U

#define ENET_BUFFDESCRIPTOR_TX_SOFTOWENER1_MASK 0x4000U

#define ENET_BUFFDESCRIPTOR_TX_WRAP_MASK 0x2000U

#define ENET_BUFFDESCRIPTOR_TX_SOFTOWENER2_MASK 0x1000U

#define ENET_BUFFDESCRIPTOR_TX_LAST_MASK 0x0800U

#define ENET_BUFFDESCRIPTOR_TX_TRANMITCRC_MASK 0x0400U

#define ENET_BUFFDESCRIPTOR_RX_ERR_MASK

Value:

(ENET_BUFFDESCRIPTOR_RX_TRUNC_MASK | ENET_BUFFDESCRIPTOR_RX_OVERRUN_MASK | \

ENET_BUFFDESCRIPTOR_RX_LENVLIOLATE_MASK | ENET_BUFFDESCRIPTOR_RX_NOOCTET_MASK | ENET_BUFFDESCRIPTOR_RX_CRC_MASK)

ENET_BUFFDESCRIPTOR_RX_OVERRUN_MASK

#define ENET_BUFFDESCRIPTOR_RX_OVERRUN_MASK

FIFO overrun mask.

Definition: fsl_enet.h:51

ENET_BUFFDESCRIPTOR_RX_TRUNC_MASK

#define ENET_BUFFDESCRIPTOR_RX_TRUNC_MASK

Frame is truncated mask.

Definition: fsl_enet.h:52

ENET_BUFFDESCRIPTOR_RX_NOOCTET_MASK

#define ENET_BUFFDESCRIPTOR_RX_NOOCTET_MASK

Non-octet aligned frame mask.

Definition: fsl_enet.h:49

ENET_BUFFDESCRIPTOR_RX_LENVLIOLATE_MASK

#define ENET_BUFFDESCRIPTOR_RX_LENVLIOLATE_MASK

Length violation mask.

Definition: fsl_enet.h:48

ENET_BUFFDESCRIPTOR_RX_CRC_MASK

#define ENET_BUFFDESCRIPTOR_RX_CRC_MASK

CRC error mask.

Definition: fsl_enet.h:50

#define ENET_FRAME_MAX_FRAMELEN 1518U

#define ENET_FIFO_MIN_RX_FULL 5U

#define ENET_RX_MIN_BUFFERSIZE 256U

#define ENET_PHY_MAXADDRESS (ENET_MMFR_PA_MASK >> ENET_MMFR_PA_SHIFT)

#define ENET_TX_INTERRUPT ((uint32_t)kENET_TxFrameInterrupt | (uint32_t)kENET_TxBufferInterrupt)

#define ENET_RX_INTERRUPT ((uint32_t)kENET_RxFrameInterrupt | (uint32_t)kENET_RxBufferInterrupt)

#define ENET_TS_INTERRUPT ((uint32_t)kENET_TsTimerInterrupt | (uint32_t)kENET_TsAvailInterrupt)

#define ENET_ERR_INTERRUPT

Value:

((uint32_t)kENET_BabrInterrupt | (uint32_t)kENET_BabtInterrupt | (uint32_t)kENET_EBusERInterrupt | \
     (uint32_t)kENET_LateCollisionInterrupt | (uint32_t)kENET_RetryLimitInterrupt |                    \
     (uint32_t)kENET_UnderrunInterrupt | (uint32_t)kENET_PayloadRxInterrupt)

#define ENET_TX_LAST_BD_FLAG 0x01U

#define ENET_TX_TIMESTAMP_FLAG 0x02U

Typedef Documentation

typedef void(* enet_callback_t)(ENET_Type *base, enet_handle_t *handle,enet_event_t event, enet_frame_info_t *frameInfo, void *userData)

typedef void(* enet_isr_t)(ENET_Type *base, enet_handle_t *handle)

Enumeration Type Documentation

anonymous enum

Enumerator
kStatus_ENET_RxFrameError	A frame received but data error happen.
kStatus_ENET_RxFrameFail	Failed to receive a frame.
kStatus_ENET_RxFrameEmpty	No frame arrive.
kStatus_ENET_TxFrameOverLen	Tx frame over length.
kStatus_ENET_TxFrameBusy	Tx buffer descriptors are under process.
kStatus_ENET_TxFrameFail	Transmit frame fail.

enum enet_mii_mode_t

Enumerator
kENET_MiiMode	MII mode for data interface.
kENET_RmiiMode	RMII mode for data interface.

enum enet_mii_speed_t

Notice: "kENET_MiiSpeed1000M" only supported when mii mode is "kENET_RgmiiMode".

Enumerator
kENET_MiiSpeed10M	Speed 10 Mbps.
kENET_MiiSpeed100M	Speed 100 Mbps.

enum enet_mii_duplex_t

Enumerator
kENET_MiiHalfDuplex	Half duplex mode.
kENET_MiiFullDuplex	Full duplex mode.

enum enet_mii_write_t

Enumerator
kENET_MiiWriteNoCompliant	Write frame operation, but not MII-compliant.
kENET_MiiWriteValidFrame	Write frame operation for a valid MII management frame.

enum enet_mii_read_t

Enumerator
kENET_MiiReadValidFrame	Read frame operation for a valid MII management frame.
kENET_MiiReadNoCompliant	Read frame operation, but not MII-compliant.

enum enet_mii_extend_opcode

Enumerator
kENET_MiiAddrWrite_C45	Address Write operation.
kENET_MiiWriteFrame_C45	Write frame operation for a valid MII management frame.
kENET_MiiReadFrame_C45	Read frame operation for a valid MII management frame.

enum enet_special_control_flag_t

These control flags are provided for special user requirements. Normally, these control flags are unused for ENET initialization. For special requirements, set the flags to macSpecialConfig in the enet_config_t. The kENET_ControlStoreAndFwdDisable is used to disable the FIFO store and forward. FIFO store and forward means that the FIFO read/send is started when a complete frame is stored in TX/RX FIFO. If this flag is set, configure rxFifoFullThreshold and txFifoWatermark in the enet_config_t.

Enumerator
kENET_ControlFlowControlEnable	Enable ENET flow control: pause frame.
kENET_ControlRxPayloadCheckEnable	Enable ENET receive payload length check.
kENET_ControlRxPadRemoveEnable	Padding is removed from received frames.
kENET_ControlRxBroadCastRejectEnable	Enable broadcast frame reject.
kENET_ControlMacAddrInsert	Enable MAC address insert.
kENET_ControlStoreAndFwdDisable	Enable FIFO store and forward.
kENET_ControlSMIPreambleDisable	Enable SMI preamble.
kENET_ControlPromiscuousEnable	Enable promiscuous mode.
kENET_ControlMIILoopEnable	Enable ENET MII loop back.
kENET_ControlVLANTagEnable	Enable normal VLAN (single vlan tag).

enum enet_interrupt_enable_t

This enumeration uses one-bot encoding to allow a logical OR of multiple members. Members usually map to interrupt enable bits in one or more peripheral registers.

Enumerator
kENET_BabrInterrupt	Babbling receive error interrupt source.
kENET_BabtInterrupt	Babbling transmit error interrupt source.
kENET_GraceStopInterrupt	Graceful stop complete interrupt source.
kENET_TxFrameInterrupt	TX FRAME interrupt source.
kENET_TxBufferInterrupt	TX BUFFER interrupt source.
kENET_RxFrameInterrupt	RX FRAME interrupt source.
kENET_RxBufferInterrupt	RX BUFFER interrupt source.
kENET_MiiInterrupt	MII interrupt source.
kENET_EBusERInterrupt	Ethernet bus error interrupt source.
kENET_LateCollisionInterrupt	Late collision interrupt source.
kENET_RetryLimitInterrupt	Collision Retry Limit interrupt source.
kENET_UnderrunInterrupt	Transmit FIFO underrun interrupt source.
kENET_PayloadRxInterrupt	Payload Receive error interrupt source.
kENET_WakeupInterrupt	WAKEUP interrupt source.
kENET_TsAvailInterrupt	TS AVAIL interrupt source for PTP.
kENET_TsTimerInterrupt	TS WRAP interrupt source for PTP.

enum enet_event_t

Enumerator
kENET_RxEvent	Receive event.
kENET_TxEvent	Transmit event.
kENET_ErrEvent	Error event: BABR/BABT/EBERR/LC/RL/UN/PLR .
kENET_WakeUpEvent	Wake up from sleep mode event.
kENET_TimeStampEvent	Time stamp event.
kENET_TimeStampAvailEvent	Time stamp available event.

enum enet_tx_accelerator_t

Enumerator
kENET_TxAccelIsShift16Enabled	Transmit FIFO shift-16.
kENET_TxAccelIpCheckEnabled	Insert IP header checksum.
kENET_TxAccelProtoCheckEnabled	Insert protocol checksum.

enum enet_rx_accelerator_t

Enumerator
kENET_RxAccelPadRemoveEnabled	Padding removal for short IP frames.
kENET_RxAccelIpCheckEnabled	Discard with wrong IP header checksum.
kENET_RxAccelProtoCheckEnabled	Discard with wrong protocol checksum.
kENET_RxAccelMacCheckEnabled	Discard with Mac layer errors.
kENET_RxAccelisShift16Enabled	Receive FIFO shift-16.

Function Documentation

uint32_t ENET_GetInstance ( ENET_Type * base )

Parameters

base	ENET peripheral base address.

Returns: ENET instance.

void ENET_GetDefaultConfig ( enet_config_t * config )

The purpose of this API is to get the default ENET MAC controller configure structure for ENET_Init(). User may use the initialized structure unchanged in ENET_Init(), or modify some fields of the structure before calling ENET_Init(). Example:

enet_config_t config;

ENET_GetDefaultConfig(&config);

Parameters

config The ENET mac controller configuration structure pointer.

void ENET_Up	(	ENET_Type *	base,
		enet_handle_t *	handle,
		const enet_config_t *	config,
		const enet_buffer_config_t *	bufferConfig,
		uint8_t *	macAddr,
		uint32_t	srcClock_Hz
	)

This function initializes the module with the ENET configuration.

Note: ENET has two buffer descriptors legacy buffer descriptors and enhanced IEEE 1588 buffer descriptors. The legacy descriptor is used by default. To use the IEEE 1588 feature, use the enhanced IEEE 1588 buffer descriptor by defining "ENET_ENHANCEDBUFFERDESCRIPTOR_MODE" and calling ENET_Ptp1588Configure() to configure the 1588 feature and related buffers after calling ENET_Up().

Parameters

base	ENET peripheral base address.
handle	ENET handler pointer.
config	ENET mac configuration structure pointer. The "enet_config_t" type mac configuration return from ENET_GetDefaultConfig can be used directly. It is also possible to verify the Mac configuration using other methods.
bufferConfig	ENET buffer configuration structure pointer. The buffer configuration should be prepared for ENET Initialization. It is the start address of "ringNum" enet_buffer_config structures. To support added multi-ring features in some soc and compatible with the previous enet driver version. For single ring supported, this bufferConfig is a buffer configure structure pointer, for multi-ring supported and used case, this bufferConfig pointer should be a buffer configure structure array pointer.
macAddr	ENET mac address of Ethernet device. This MAC address should be provided.
srcClock_Hz	The internal module clock source for MII clock.

void ENET_Init	(	ENET_Type *	base,
		enet_handle_t *	handle,
		const enet_config_t *	config,
		const enet_buffer_config_t *	bufferConfig,
		uint8_t *	macAddr,
		uint32_t	srcClock_Hz
	)

This function ungates the module clock and initializes it with the ENET configuration.

Note: ENET has two buffer descriptors legacy buffer descriptors and enhanced IEEE 1588 buffer descriptors. The legacy descriptor is used by default. To use the IEEE 1588 feature, use the enhanced IEEE 1588 buffer descriptor by defining "ENET_ENHANCEDBUFFERDESCRIPTOR_MODE" and calling ENET_Ptp1588Configure() to configure the 1588 feature and related buffers after calling ENET_Init().

Parameters

base	ENET peripheral base address.
handle	ENET handler pointer.
config	ENET mac configuration structure pointer. The "enet_config_t" type mac configuration return from ENET_GetDefaultConfig can be used directly. It is also possible to verify the Mac configuration using other methods.
bufferConfig	ENET buffer configuration structure pointer. The buffer configuration should be prepared for ENET Initialization. It is the start address of "ringNum" enet_buffer_config structures. To support added multi-ring features in some soc and compatible with the previous enet driver version. For single ring supported, this bufferConfig is a buffer configure structure pointer, for multi-ring supported and used case, this bufferConfig pointer should be a buffer configure structure array pointer.
macAddr	ENET mac address of Ethernet device. This MAC address should be provided.
srcClock_Hz	The internal module clock source for MII clock.

void ENET_Down ( ENET_Type * base )

This function disables the ENET module.

Parameters

base	ENET peripheral base address.

void ENET_Deinit ( ENET_Type * base )

This function gates the module clock, clears ENET interrupts, and disables the ENET module.

Parameters

base	ENET peripheral base address.

static void ENET_Reset ( ENET_Type * base )

inlinestatic

This function restores the ENET module to reset state. Note that this function sets all registers to reset state. As a result, the ENET module can't work after calling this function.

Parameters

base	ENET peripheral base address.

void ENET_SetMII	(	ENET_Type *	base,
		enet_mii_speed_t	speed,
		enet_mii_duplex_t	duplex
	)

This API is provided to dynamically change the speed and dulpex for MAC.

Parameters

base	ENET peripheral base address.
speed	The speed of the RMII mode.
duplex	The duplex of the RMII mode.

void ENET_SetSMI	(	ENET_Type *	base,
		uint32_t	srcClock_Hz,
		bool	isPreambleDisabled
	)

Parameters

base	ENET peripheral base address.
srcClock_Hz	This is the ENET module clock frequency. Normally it's the system clock. See clock distribution.
isPreambleDisabled	The preamble disable flag. true Enables the preamble. false Disables the preamble.

static bool ENET_GetSMI ( ENET_Type * base )

inlinestatic

This API is used to get the SMI configuration to check whether the MII management interface has been set.

Parameters

base	ENET peripheral base address.

Returns: The SMI setup status true or false.

static uint32_t ENET_ReadSMIData ( ENET_Type * base )

inlinestatic

Parameters

base	ENET peripheral base address.

Returns: The data read from PHY

void ENET_StartSMIRead	(	ENET_Type *	base,
		uint32_t	phyAddr,
		uint32_t	phyReg,
		enet_mii_read_t	operation
	)

Used for standard IEEE802.3 MDIO Clause 22 format.

Parameters

base	ENET peripheral base address.
phyAddr	The PHY address.
phyReg	The PHY register. Range from 0 ~ 31.
operation	The read operation.

void ENET_StartSMIWrite	(	ENET_Type *	base,
		uint32_t	phyAddr,
		uint32_t	phyReg,
		enet_mii_write_t	operation,
		uint32_t	data
	)

Used for standard IEEE802.3 MDIO Clause 22 format.

Parameters

base	ENET peripheral base address.
phyAddr	The PHY address.
phyReg	The PHY register. Range from 0 ~ 31.
operation	The write operation.
data	The data written to PHY.

void ENET_StartExtC45SMIRead	(	ENET_Type *	base,
		uint32_t	phyAddr,
		uint32_t	phyReg
	)

Deprecated:: Do not use this function. It has been superceded by ENET_StartExtC45SMIWriteReg and ENET_StartExtC45SMIReadData.

Parameters

base	ENET peripheral base address.
phyAddr	The PHY address.
phyReg	The PHY register. For MDIO IEEE802.3 Clause 45, the phyReg is a 21-bits combination of the devaddr (5 bits device address) and the regAddr (16 bits phy register): phyReg = (devaddr << 16) \| regAddr.

void ENET_StartExtC45SMIWrite	(	ENET_Type *	base,
		uint32_t	phyAddr,
		uint32_t	phyReg,
		uint32_t	data
	)

Deprecated:: Do not use this function. It has been superceded by ENET_StartExtC45SMIWriteReg and ENET_StartExtC45SMIWriteData.

Parameters

base	ENET peripheral base address.
phyAddr	The PHY address.
phyReg	The PHY register. For MDIO IEEE802.3 Clause 45, the phyReg is a 21-bits combination of the devaddr (5 bits device address) and the regAddr (16 bits phy register): phyReg = (devaddr << 16) \| regAddr.
data	The data written to PHY.

void ENET_StartExtC45SMIWriteReg	(	ENET_Type *	base,
		uint32_t	phyAddr,
		uint32_t	phyReg
	)

Parameters

base	ENET peripheral base address.
phyAddr	The PHY address.
phyReg	The PHY register. For MDIO IEEE802.3 Clause 45, the phyReg is a 21-bits combination of the devaddr (5 bits device address) and the regAddr (16 bits phy register): phyReg = (devaddr << 16) \| regAddr.

void ENET_StartExtC45SMIWriteData	(	ENET_Type *	base,
		uint32_t	phyAddr,
		uint32_t	phyReg,
		uint32_t	data
	)

After writing MMFR register, we need to check whether the transmission is over. This is an example for whole precedure of clause 45 MDIO write.

*       ENET_ClearInterruptStatus(base, ENET_EIR_MII_MASK);
*       ENET_StartExtC45SMIWriteReg(base, phyAddr, phyReg);
*       while ((ENET_GetInterruptStatus(base) & ENET_EIR_MII_MASK) == 0U)
*       {
*       }
*       ENET_ClearInterruptStatus(base, ENET_EIR_MII_MASK);
*       ENET_StartExtC45SMIWriteData(base, phyAddr, phyReg, data);
*       while ((ENET_GetInterruptStatus(base) & ENET_EIR_MII_MASK) == 0U)
*       {
*       }
*       ENET_ClearInterruptStatus(base, ENET_EIR_MII_MASK);
* 

Parameters

base	ENET peripheral base address.
phyAddr	The PHY address.
phyReg	The PHY register. For MDIO IEEE802.3 Clause 45, the phyReg is a 21-bits combination of the devaddr (5 bits device address) and the regAddr (16 bits phy register): phyReg = (devaddr << 16) \| regAddr.
data	The data written to PHY.

void ENET_StartExtC45SMIReadData	(	ENET_Type *	base,
		uint32_t	phyAddr,
		uint32_t	phyReg
	)

After writing MMFR register, we need to check whether the transmission is over. This is an example for whole precedure of clause 45 MDIO read.

*       uint32_t data;
*       ENET_ClearInterruptStatus(base, ENET_EIR_MII_MASK);
*       ENET_StartExtC45SMIWriteReg(base, phyAddr, phyReg);
*       while ((ENET_GetInterruptStatus(base) & ENET_EIR_MII_MASK) == 0U)
*       {
*       }
*       ENET_ClearInterruptStatus(base, ENET_EIR_MII_MASK);
*       ENET_StartExtC45SMIReadData(base, phyAddr, phyReg);
*       while ((ENET_GetInterruptStatus(base) & ENET_EIR_MII_MASK) == 0U)
*       {
*       }
*       ENET_ClearInterruptStatus(base, ENET_EIR_MII_MASK);
*       data = ENET_ReadSMIData(base);
* 

Parameters

base	ENET peripheral base address.
phyAddr	The PHY address.
phyReg	The PHY register. For MDIO IEEE802.3 Clause 45, the phyReg is a 21-bits combination of the devaddr (5 bits device address) and the regAddr (16 bits phy register): phyReg = (devaddr << 16) \| regAddr.

void ENET_SetMacAddr	(	ENET_Type *	base,
		uint8_t *	macAddr
	)

Parameters

base	ENET peripheral base address.
macAddr	The six-byte Mac address pointer. The pointer is allocated by application and input into the API.

void ENET_GetMacAddr	(	ENET_Type *	base,
		uint8_t *	macAddr
	)

Parameters

base	ENET peripheral base address.
macAddr	The six-byte Mac address pointer. The pointer is allocated by application and input into the API.

void ENET_AddMulticastGroup	(	ENET_Type *	base,
		uint8_t *	address
	)

Parameters

base	ENET peripheral base address.
address	The six-byte multicast group address which is provided by application.

void ENET_LeaveMulticastGroup	(	ENET_Type *	base,
		uint8_t *	address
	)

Parameters

base	ENET peripheral base address.
address	The six-byte multicast group address which is provided by application.

static void ENET_ActiveRead ( ENET_Type * base )

inlinestatic

This function is to active the enet read process.

Note: This must be called after the MAC configuration and state are ready. It must be called after the ENET_Init() and ENET_Ptp1588Configure(). This should be called when the ENET receive required.

Parameters

base	ENET peripheral base address.

static void ENET_EnableSleepMode	(	ENET_Type *	base,
		bool	enable
	)

inlinestatic

This function is used to set the MAC enter sleep mode. When entering sleep mode, the magic frame wakeup interrupt should be enabled to wake up MAC from the sleep mode and reset it to normal mode.

Parameters

base	ENET peripheral base address.
enable	True enable sleep mode, false disable sleep mode.

static void ENET_GetAccelFunction	(	ENET_Type *	base,
		uint32_t *	txAccelOption,
		uint32_t *	rxAccelOption
	)

inlinestatic

Parameters

base	ENET peripheral base address.
txAccelOption	The transmit accelerator option. The "enet_tx_accelerator_t" is recommended to be used to as the mask to get the exact the accelerator option.
rxAccelOption	The receive accelerator option. The "enet_rx_accelerator_t" is recommended to be used to as the mask to get the exact the accelerator option.

static void ENET_EnableInterrupts	(	ENET_Type *	base,
		uint32_t	mask
	)

inlinestatic

This function enables the ENET interrupt according to the provided mask. The mask is a logical OR of enumeration members. See enet_interrupt_enable_t. For example, to enable the TX frame interrupt and RX frame interrupt, do the following.

* ENET_EnableInterrupts(ENET, kENET_TxFrameInterrupt | kENET_RxFrameInterrupt);

*

Parameters

base	ENET peripheral base address.
mask	ENET interrupts to enable. This is a logical OR of the enumeration enet_interrupt_enable_t.

static void ENET_DisableInterrupts	(	ENET_Type *	base,
		uint32_t	mask
	)

inlinestatic

This function disables the ENET interrupts according to the provided mask. The mask is a logical OR of enumeration members. See :enet_interrupt_enable_t. For example, to disable the TX frame interrupt and RX frame interrupt, do the following.

* ENET_DisableInterrupts(ENET, kENET_TxFrameInterrupt | kENET_RxFrameInterrupt);

*

Parameters

base	ENET peripheral base address.
mask	ENET interrupts to disable. This is a logical OR of the enumeration enet_interrupt_enable_t.

static uint32_t ENET_GetInterruptStatus ( ENET_Type * base )

inlinestatic

Parameters

base	ENET peripheral base address.

Returns: The event status of the interrupt source. This is the logical OR of members of the enumeration enet_interrupt_enable_t.

static void ENET_ClearInterruptStatus	(	ENET_Type *	base,
		uint32_t	mask
	)

inlinestatic

This function clears enabled ENET interrupts according to the provided mask. The mask is a logical OR of enumeration members. See the enet_interrupt_enable_t. For example, to clear the TX frame interrupt and RX frame interrupt, do the following.

* ENET_ClearInterruptStatus(ENET, kENET_TxFrameInterrupt | kENET_RxFrameInterrupt);

*

Parameters

base	ENET peripheral base address.
mask	ENET interrupt source to be cleared. This is the logical OR of members of the enumeration enet_interrupt_enable_t.

void ENET_SetRxISRHandler	(	ENET_Type *	base,
		enet_isr_t	ISRHandler
	)

Parameters

base	ENET peripheral base address.
ISRHandler	The handler to install.

void ENET_SetTxISRHandler	(	ENET_Type *	base,
		enet_isr_t	ISRHandler
	)

Parameters

base	ENET peripheral base address.
ISRHandler	The handler to install.

void ENET_SetErrISRHandler	(	ENET_Type *	base,
		enet_isr_t	ISRHandler
	)

Parameters

base	ENET peripheral base address.
ISRHandler	The handler to install.

void ENET_SetCallback	(	enet_handle_t *	handle,
		enet_callback_t	callback,
		void *	userData
	)

This API is provided for the application callback required case when ENET interrupt is enabled. This API should be called after calling ENET_Init.

Parameters

handle	ENET handler pointer. Should be provided by application.
callback	The ENET callback function.
userData	The callback function parameter.

void ENET_GetRxErrBeforeReadFrame	(	enet_handle_t *	handle,
		enet_data_error_stats_t *	eErrorStatic,
		uint8_t	ringId
	)

This API must be called after the ENET_GetRxFrameSize and before the ENET_ReadFrame(). If the ENET_GetRxFrameSize returns kStatus_ENET_RxFrameError, the ENET_GetRxErrBeforeReadFrame can be used to get the exact error statistics. This is an example.

*       status = ENET_GetRxFrameSize(&g_handle, &length, 0);
*       if (status == kStatus_ENET_RxFrameError)
*       {
*           Comments: Get the error information of the received frame.
*           ENET_GetRxErrBeforeReadFrame(&g_handle, &eErrStatic, 0);
*           Comments: update the receive buffer.
*           ENET_ReadFrame(EXAMPLE_ENET, &g_handle, NULL, 0);
*       }
* 

Parameters

handle	The ENET handler structure pointer. This is the same handler pointer used in the ENET_Init.
eErrorStatic	The error statistics structure pointer.
ringId	The ring index, range from 0 ~ FSL_FEATURE_ENET_QUEUE - 1.

status_t ENET_GetRxFrameSize	(	enet_handle_t *	handle,
		uint32_t *	length,
		uint8_t	ringId
	)

This function gets a received frame size from the ENET buffer descriptors.

Note: The FCS of the frame is automatically removed by MAC and the size is the length without the FCS. After calling ENET_GetRxFrameSize, ENET_ReadFrame() should be called to update the receive buffers if the result is not "kStatus_ENET_RxFrameEmpty".

Parameters

handle	The ENET handler structure. This is the same handler pointer used in the ENET_Init.
length	The length of the valid frame received.
ringId	The ring index or ring number.

Return values

kStatus_ENET_RxFrameEmpty	No frame received. Should not call ENET_ReadFrame to read frame.
kStatus_ENET_RxFrameError	Data error happens. ENET_ReadFrame should be called with NULL data and NULL length to update the receive buffers.
kStatus_Success	Receive a frame Successfully then the ENET_ReadFrame should be called with the right data buffer and the captured data length input.

status_t ENET_ReadFrame	(	ENET_Type *	base,
		enet_handle_t *	handle,
		uint8_t *	data,
		uint32_t	length,
		uint8_t	ringId,
		uint32_t *	ts
	)

This function reads a frame (both the data and the length) from the ENET buffer descriptors. User can get timestamp through ts pointer if the ts is not NULL. Note that it doesn't store the timestamp in the receive timestamp queue. The ENET_GetRxFrameSize should be used to get the size of the prepared data buffer. This is an example:

*       uint32_t length;
*       enet_handle_t g_handle;
*       Comments: Get the received frame size firstly.
*       status = ENET_GetRxFrameSize(&g_handle, &length, 0);
*       if (length != 0)
*       {
*           Comments: Allocate memory here with the size of "length"
*           uint8_t *data = memory allocate interface;
*           if (!data)
*           {
*               ENET_ReadFrame(ENET, &g_handle, NULL, 0, 0, NULL);
*               Comments: Add the console warning log.
*           }
*           else
*           {
*               status = ENET_ReadFrame(ENET, &g_handle, data, length, 0, NULL);
*               Comments: Call stack input API to deliver the data to stack
*           }
*       }
*       else if (status == kStatus_ENET_RxFrameError)
*       {
*           Comments: Update the received buffer when a error frame is received.
*           ENET_ReadFrame(ENET, &g_handle, NULL, 0, 0, NULL);
*       }
* 

Parameters

base	ENET peripheral base address.
handle	The ENET handler structure. This is the same handler pointer used in the ENET_Init.
data	The data buffer provided by user to store the frame which memory size should be at least "length".
length	The size of the data buffer which is still the length of the received frame.
ringId	The ring index or ring number.
ts	The timestamp address to store received timestamp.

Returns: The execute status, successful or failure.

status_t ENET_SendFrame	(	ENET_Type *	base,
		enet_handle_t *	handle,
		const uint8_t *	data,
		uint32_t	length,
		uint8_t	ringId,
		bool	tsFlag,
		void *	context
	)

Note: The CRC is automatically appended to the data. Input the data to send without the CRC.

Parameters

base	ENET peripheral base address.
handle	The ENET handler pointer. This is the same handler pointer used in the ENET_Init.
data	The data buffer provided by user to send.
length	The length of the data to send.
ringId	The ring index or ring number.
tsFlag	Timestamp enable flag.
context	Used by user to handle some events after transmit over.

Return values

kStatus_Success	Send frame succeed.
kStatus_ENET_TxFrameBusy	Transmit buffer descriptor is busy under transmission. The transmit busy happens when the data send rate is over the MAC capacity. The waiting mechanism is recommended to be added after each call return with kStatus_ENET_TxFrameBusy.

status_t ENET_SetTxReclaim	(	enet_handle_t *	handle,
		bool	isEnable,
		uint8_t	ringId
	)

Note: This function must be called when no pending send frame action. Set enable if you want to reclaim context or timestamp in interrupt.

Parameters

handle	The ENET handler pointer. This is the same handler pointer used in the ENET_Init.
isEnable	Enable or disable flag.
ringId	The ring index or ring number.

Return values

kStatus_Success	Succeed to enable/disable Tx reclaim.
kStatus_Fail	Fail to enable/disable Tx reclaim.

status_t ENET_GetRxBuffer	(	ENET_Type *	base,
		enet_handle_t *	handle,
		void **	buffer,
		uint32_t *	length,
		uint8_t	ringId,
		bool *	isLastBuff,
		uint32_t *	ts
	)

This function can get the data address which stores frame. Then can analyze these data directly without doing any memory copy. When the frame locates in multiple BD buffer, need to repeat calling this function until isLastBuff=true (need to store the temp buf pointer everytime call this function). After finishing the analysis of this frame, call ENET_ReleaseRxBuffer to release rxbuff memory to DMA. This is an example:

*       uint32_t length;
*       uint8_t *buf = NULL;
*       uint32_t data_len = 0;
*       bool isLastBuff = false;
*       enet_handle_t g_handle;
*       status_t status;
*       status = ENET_GetRxFrameSize(&g_handle, &length, 0);
*       if (length != 0)
*       {
*           ENET_GetRxBuffer(EXAMPLE_ENET, &g_handle, &buf, &data_len, 0, &isLastBuff, NULL);
*           ENET_ReleaseRxBuffer(EXAMPLE_ENET, &g_handle, buf, 0);
*       }
* 

Parameters

base	ENET peripheral base address.
handle	The ENET handler structure. This is the same handler pointer used in the ENET_Init.
buffer	The data buffer pointer to store the frame.
length	The size of the data buffer. If isLastBuff=false, it represents data length of this buffer. If isLastBuff=true, it represents data length of total frame.
ringId	The ring index, range from 0 ~ FSL_FEATURE_ENET_QUEUE - 1.
isLastBuff	The flag represents whether this buffer is the last buffer to store frame.
ts	The 1588 timestamp value, vaild in last buffer.

Return values

kStatus_Success	Get receive buffer succeed.
kStatus_ENET_RxFrameFail	Get receive buffer fails, it's owned by application, should wait app to release this buffer.

void ENET_ReleaseRxBuffer	(	ENET_Type *	base,
		enet_handle_t *	handle,
		void *	buffer,
		uint8_t	ringId
	)

This function can release specified BD owned by application, meanwhile it may rearrange the BD to let the no-owned BDs always in back of the index of DMA transfer. So for the situation that releasing order is not same as the getting order, the rearrangement makes all ready BDs can be used by DMA.

Note: This function can't be interrupted by ENET_GetRxBuffer, so in application must make sure ENET_GetRxBuffer is called before or after this function. And this function itself isn't thread safe due to BD content exchanging.

Parameters

base	ENET peripheral base address.
handle	The ENET handler structure. This is the same handler pointer used in the ENET_Init.
buffer	The buffer address to store frame, using it to find the correspond BD and release it.
ringId	The ring index, range from 0 ~ FSL_FEATURE_ENET_QUEUE - 1.

status_t ENET_SendFrameZeroCopy	(	ENET_Type *	base,
		enet_handle_t *	handle,
		const uint8_t *	data,
		uint32_t	length,
		uint8_t	ringId,
		bool	tsFlag,
		void *	context
	)

Note: The CRC is automatically appended to the data. Input the data to send without the CRC. The frame must store in continuous memeory and need to check the buffer start address alignment based on your device, otherwise it has issue or can't get highest DMA transmit speed.

Parameters

base	ENET peripheral base address.
handle	The ENET handler pointer. This is the same handler pointer used in the ENET_Init.
data	The data buffer provided by user to send.
length	The length of the data to send.
ringId	The ring index or ring number.
tsFlag	Timestamp enable flag.
context	Used by user to handle some events after transmit over.

Return values

kStatus_Success	Send frame succeed.
kStatus_ENET_TxFrameBusy	Transmit buffer descriptor is busy under transmission. The transmit busy happens when the data send rate is over the MAC capacity. The waiting mechanism is recommended to be added after each call return with kStatus_ENET_TxFrameBusy.

status_t ENET_SetTxBuffer	(	ENET_Type *	base,
		enet_handle_t *	handle,
		const uint8_t *	data,
		uint32_t	length,
		uint8_t	ringId,
		uint8_t	txFlag,
		void *	context
	)

This function only set one Tx BD everytime calls, all ready data will be sent out with last flag sets or gets error. Send frame succeeds with last flag sets, then you can get context from frameInfo in callback.

Note: The CRC is automatically appended to the data. Input the data to send without the CRC. And if doesn't succeed to call this function, user can't get context in frameInfo of callback.

Parameters

base	ENET peripheral base address.
handle	The ENET handler pointer. This is the same handler pointer used in the ENET_Init.
data	The data buffer provided by user to send.
length	The length of the data to send.
ringId	The ring index, range from 0 ~ FSL_FEATURE_ENET_QUEUE - 1.
txFlag	This function uses timestamp enable flag, last BD flag.
context	Used by user to handle some events after transmit over.

Return values

kStatus_Success	Send frame succeed.
kStatus_ENET_TxFrameOverLen	Buffer length isn't enough to store data.
kStatus_ENET_TxFrameBusy	Transmit buffer descriptor is busy under transmission. The transmit busy happens when the data send rate is over the MAC capacity.

void ENET_TransmitIRQHandler	(	ENET_Type *	base,
		enet_handle_t *	handle
	)

Parameters

base	ENET peripheral base address.
handle	The ENET handler pointer.

void ENET_ReceiveIRQHandler	(	ENET_Type *	base,
		enet_handle_t *	handle
	)

Parameters

base	ENET peripheral base address.
handle	The ENET handler pointer.

void ENET_ErrorIRQHandler	(	ENET_Type *	base,
		enet_handle_t *	handle
	)

Parameters

base	ENET peripheral base address.
handle	The ENET handler pointer.

void ENET_CommonFrame0IRQHandler ( ENET_Type * base )

This is used for the combined tx/rx/error interrupt for single/mutli-ring (frame 0).

Parameters

base	ENET peripheral base address.

Overview

ENET: Ethernet MAC Driver {EthernetMACDriver}

Operations of Ethernet MAC Driver

MII interface Operation

MAC address filter

Other Baisc control Operations

Transactional Operation

PTP IEEE 1588 Feature Operation

Typical use case

ENET Initialization, receive, and transmit operations

Modules

Data Structures

Macros

Typedefs

Enumerations

Functions

Driver version

Control and status region bit masks of the receive buffer descriptor.

Control and status bit masks of the transmit buffer descriptor.

Defines some Ethernet parameters.

Defines Tx operation flags.

Initialization and De-initialization

MII interface operation

MAC Address Filter

Other basic operation

Interrupts.

Transactional operation

Data Structure Documentation

Data Fields

Field Documentation

Data Fields

Field Documentation

Data Fields

Field Documentation

Data Fields

Data Fields

Field Documentation

Data Fields

Field Documentation

Data Fields

Field Documentation

Data Fields

Field Documentation

Data Fields

Field Documentation

Data Fields

Field Documentation

Data Fields

Field Documentation

Macro Definition Documentation

Typedef Documentation

Enumeration Type Documentation

Function Documentation