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friendev EtherDune TCP/IP library
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friendev EtherDune TCP/IP library
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ENC28J60 memory segmentation and internal buffer sizes. More...
Macros | |
| #define | MAX_FRAMELEN 1500 |
| max frame length which the conroller will accept: (note: maximum ethernet frame length would be 1518) More... | |
| #define | RXBUFFER_SIZE 3072 |
| size of the receive buffer size. More... | |
| #define | TXBUFFER_SIZE 1024 |
| size of the transmit buffer size. More... | |
ENC28J60 memory segmentation and internal buffer sizes.
Buffer boundaries applied to internal 8K ram. The default configuration allocates the entire available packet buffer space.
RX buffer: packets are received here in a circular buffer fashion. The larger this buffer, the more packets that can be waiting for processing. The default allows for approximately two ethernet frames. However, EtherDune will request the other end to send packets as small as possible given memory is limited in the microcontroller.
TX buffer: space to assemble an outgoing packet. The larger the buffer, the larger you can have EtherDune send TCP segments out. You should not make this larger than 1500 which is the maximum size of an Ethernet frame anyway.
Shared buffer: This will automatically compute as the remainder: 8192 - RXBUFFER_SIZE - TXBUFFER_SIZE. This is sort of a software-managed circular buffer shared among all sockets. It holds TCP segments that may need to be retransmitted and serves as an assembly area when you call write() on a socket. A minimum of 2048 bytes is recommended.
| #define MAX_FRAMELEN 1500 |
| #define RXBUFFER_SIZE 3072 |
1.8.9.1
