WARP Project Forums - Wireless Open-Access Research Platform

Following up another post about Ethernet communications between PC and WARP, I found another problem. 

I am working based on the 802.11 reference design v1.5.0 on WARP v3 boards.

I let a PC send multiple UDP packets to a WARP board. I disabled the response request. So the PC would keep sending UDP packets without waiting for the response. In the XDK I set num_rx_buffers as 8. I am sure the buffer number is sufficient and no packet was dropped. However, I found a strange problem: if I send 800 integers in each packets, then sometimes the later part of a receive buffer would be occupied by the content of the next packet. That is, the buffers look like:

buffer 0: header of packet 0; int[0] to int[546] of packet 0; header of packet 1; int[0] to int[235] of packet 1
buffer 1: header of packet 1; int[0] to int[546] of packet 1; header of packet 2; int[0] to int[235] of packet 2
...

Note that the problem always happens at the index 546. If I send less than 500 integers in each packet, I don't have this problem. It seems that when the packet is long, WARP does not write the buffer correctly, and somehow the later part of the buffer is overwritten.
Your ideas and suggestions would be highly appreciated.

Last edited by adherentx (2016-Aug-27 08:12:09)