TM4C1294NCPDT: TM4C1294NCPDT ETHERENT RX BUFFER SIZE (PBUF_POOL_BUFSIZE)

the problem I am facing is in ethernet Receiver side (pBuf)  iam only able to get around 900 bytes correctly above that size of datas more than 900 bytes whatever iam receiving is junk 

thats why i thought increasing  the RX buffer size in lwip but it refer to PBUF_POOL_BUFSIZE while changing this will increase the bandwidth  in Ethernet Rx pBuf  

please tell what change need to be done to receive  more ( greater than 900 bytes ) number data's from Rx etherenet PBuf->(payload)

Are you running your own firmware? What type of firmware is it?

NO 

Iam trying to firmware upgrade over Ethernet with LWIP (TCP) TM4C1924-EVK

from laptop a python application will send the firmware upgrade packet to EVK , 

In the EVK RX side it could not handle more than 900 bytes (pBuf) send from python application 

what changes to be made in lwipots.h file to increase the Ethernet RX buffer size ?

Are you not using the Ethernet bootloader example at C:\ti\TivaWare_C_Series-2.2.0.295\examples\boards\ek-tm4c1294xl\boot_emac_flash? If you are not using the provided example then why are you not using it? If you use the bootloader example then do you see the problem? The basic question, can you get the TivaWare bootloader to work over the Ethernet?

No Iam using enet_lwip example 

How to configure to increase the payload buffer size of this pBuf->payload

below image for reference ?

where and what to configure to increase the buffer size for this pbuf

Can you try this example instead.

tcp_echo_server_lwip.zip

Hi charles 

Thank you 

I tried this example but i am facing same when I tried to receive more than 900 bytes iam getting junk value 

can you please suggest what configuration change need to be done to increase the ethernet RX buffer payload size 

Like any configuration change to be made in lwipopts.h file ?

The example I attached is based on the source code (the echo.c file) from lwip repository created by Adam Dunkels. I don't understand what you mean beyond 900 bytes is junk. I don't know what parameters in lwipopts.h file to change. Why don't you use Wireshark to show the payload that you sending from python. First make sure what you send out from python beyond 900 bytes is correct. If there are lwip parameters to solve which I'm not aware, I will suggest you reach out to lwip forum for guidance as this is a 3rd party code.