[lwip-users] lwipopts.h, how to enlarge send and receive packet size

[LP/李]

Dear all:

 

I am new one in this group.

Very glad to know your all.

 

I use Stellaris and I use the open source (from TI homepage) for driver.

 

Sometimes,  my stellaris need to send or receive large size packet (almost 1200byte).

However, the buffer size is defined  as

        #define PBUF_POOL_BUFSIZE 256 

in "lwipopts.h".

 

Now, my stellaris can send packet as large as 1200 byte but it can NOT receive packet (1200bytes).

and I do not know the reason.

 

I have 1 question. 

 

When I send a packet (1200 bytes), and the "#define PBUF_POOL_BUFSIZE 256",

the first 256 packets are saved in the buffer and

the rest 1200-256 bytes overflow the buffer size and not correctly saved.

 

Is my comprehension above correct?

Is it possible to configure the PBUF_POOL_BUFSIZE and PBUF_POOL_SIZE to send and receive packet as large as 1200 bytes.

 

 

 

Thanks in advance and sorry for interruption.

 

 

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