UM0248 datasheet(18/26 Pages) STMICROELECTRONICS

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ENET firmware library

UM0248

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2.2.11

ENET_HandleRxPkt

2.2.12

ENET_UpdateTxDescr

2.2.13

ENET_HandleTxPkt

Function name

ENET_HandleRxPkt

Function prototype

u32 ENET_HandleRxPkt(void *ppkt)

Behavior description

Receives a packet and copies it to memory buffer pointed by ppkt.

Input parameter

ppkt: pointer on application receive buffer.

Output parameter

None

Return parameter

Packet size value or 0 (if there is no packet).

Required preconditions

None

Called functions

ENET_GetRxStatus

ENET_UpdateRxDscr

Function name

ENET_UpdateTxDescr

Function prototype

void ENET_SendPkt(void)

Behavior description

Starts frame sending by setting the valid bit in the ENET DMA PACKET

STATUS word.

Input parameter

None

Output parameter

None

Return parameter

None

Required preconditions

None

Called functions

None

Function name

ENET_HandleTxPkt

Function prototype

void ENET_HandleTxPkt(void *ppkt, u16 size)

Behavior description

Performs the packet transmission:

- copies the packet pointed by ppkt to the ENET DMA buffer memory,

- starts packet sending by setting the valid bit in the PACKET STATUS

word of the corresponding ENET DMA descriptor.

Input parameter 1

ppkt: pointer on application receive buffer.

Input parameter 2

size: the size of the packet to be copied.

Output parameter

None

Return parameter

None

Required preconditions

None

Called functions

ENET_UpdateTxDscr

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