AWR2944EVM: Why is the Enet so fragile?

紫圣王

Part Number: AWR2944EVM

Tool/software:

Hi Designer,

I encounter a problem when transferring pointCloud data through Enet in DDMA mode.

1.when size of data transferred to PC excesses TCP_MSS(1460B) defined in <lwipopt.h>, netconn_write will result in crush on the board.

2.I try to divide data into segments manually to bypass this problem, it will crush as well if there is not a break of 50ms at least between transfers.

Regards,

Zisheng Wang.

4 days ago

0 紫圣王 4 days ago

Prodigy 130 points

I am sorry to say that I forget to state what change I made.

1. turning off DHCP marco in lwipopt.h, instead I provide a const value to local IP because there is not route in use , only switch in use.

0 Ajay Narayan 2 days ago in reply to 紫圣王

TI__Mastermind 20425 points

Hi Zisheng Wang,

Are you using the OOB demo or is it a custom implementation. Also what is the SDK version you are using?

1460B is the limit of 1 Ethernet frame size. This cannot be exceeded..

Regards,

Ajay

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AWR2944EVM: Why is the Enet so fragile?