ETH Buffers setting

Defines
#define	ETH_MAX_PACKET_SIZE   1524U
#define	ETH_HEADER   14U
#define	ETH_CRC   4U
#define	ETH_EXTRA   2U
#define	ETH_VLAN_TAG   4U
#define	ETH_MIN_ETH_PAYLOAD   46U
#define	ETH_MAX_ETH_PAYLOAD   1500U
#define	ETH_JUMBO_FRAME_PAYLOAD   9000U
#define	ETH_RX_BUF_SIZE   ETH_MAX_PACKET_SIZE
#define	ETH_RXBUFNB   5U /* 5 Rx buffers of size ETH_RX_BUF_SIZE */
#define	ETH_TX_BUF_SIZE   ETH_MAX_PACKET_SIZE
#define	ETH_TXBUFNB   5U /* 5 Tx buffers of size ETH_TX_BUF_SIZE */

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Define Documentation

#define ETH_CRC   4U

Ethernet CRC

Definition at line 661 of file stm32f4xx_hal_eth.h.

#define ETH_EXTRA   2U

Extra bytes in some cases

Definition at line 662 of file stm32f4xx_hal_eth.h.

#define ETH_HEADER   14U

6 byte Dest addr, 6 byte Src addr, 2 byte length/type

Definition at line 660 of file stm32f4xx_hal_eth.h.

#define ETH_JUMBO_FRAME_PAYLOAD   9000U

Jumbo frame payload size

Definition at line 666 of file stm32f4xx_hal_eth.h.

#define ETH_MAX_ETH_PAYLOAD   1500U

Maximum Ethernet payload size

Definition at line 665 of file stm32f4xx_hal_eth.h.

#define ETH_MAX_PACKET_SIZE   1524U

ETH_HEADER + ETH_EXTRA + ETH_VLAN_TAG + ETH_MAX_ETH_PAYLOAD + ETH_CRC

Definition at line 659 of file stm32f4xx_hal_eth.h.

#define ETH_MIN_ETH_PAYLOAD   46U

Minimum Ethernet payload size

Definition at line 664 of file stm32f4xx_hal_eth.h.

#define ETH_RX_BUF_SIZE   ETH_MAX_PACKET_SIZE

Definition at line 686 of file stm32f4xx_hal_eth.h.

#define ETH_RXBUFNB   5U /* 5 Rx buffers of size ETH_RX_BUF_SIZE */

Definition at line 691 of file stm32f4xx_hal_eth.h.

#define ETH_TX_BUF_SIZE   ETH_MAX_PACKET_SIZE

Definition at line 713 of file stm32f4xx_hal_eth.h.

#define ETH_TXBUFNB   5U /* 5 Tx buffers of size ETH_TX_BUF_SIZE */

Definition at line 718 of file stm32f4xx_hal_eth.h.

#define ETH_VLAN_TAG   4U

optional 802.1q VLAN Tag

Definition at line 663 of file stm32f4xx_hal_eth.h.