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Hi Chris, Chris Strahm schrieb: In other words: for the standard ATMEL EMAC driver in the FREERTOS port for SAM7, which defines the buffer size as 128 bytes (with a big "do not change"), i should have the PBUF_POOL_BUFSIZE in LWIP defined to 128?Correct, I wrote my own driver for the ARM7 LPC23XX/24XX. I wrote the driver so that it could handle PBUFs of different size than the EMAC DMA buffers: equal, bigger, or smaller. Unless your driver is specifically written to handle all of this data reorganization between the PBUFs and the DMA bufs, it's best to assume they need to be the exact same size. /* Number of receive buffers */ #define NB_RX_BUFFERS ( 16 ) /* Size of each receive buffer - DO NOT CHANGE. */ #define ETH_RX_BUFFER_SIZE ( 128 ) /* Number of Transmit buffers */ #define NB_TX_BUFFERS ( 16 ) /* Size of each Transmit buffer. */ #define ETH_TX_BUFFER_SIZE ( 128 ) Kind regards Marco |
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