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#1 2015-Aug-27 09:45:03

theerawat
Member
Registered: 2015-Aug-27
Posts: 3

About packet size

Hi,

I always get error received packets when the size of each packet is more than 2048 bytes, which I think should be the maximum size of each packet buffer. Is there any way to send packet longer than this?

(I am using OFDM Reference Design v16.2 and WARP board v1.2)

Thanks in advance

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#2 2015-Aug-27 22:10:02

murphpo
Administrator
From: Mango Communications
Registered: 2006-Jul-03
Posts: 5159

Re: About packet size

In the OFDM Reference Design the packet buffer RAM is 64KB. By default the PHY addresses the packet buffer RAM as 32 buffers of 2KB each. The PHY supports a "big packet" mode, where the PHY addresses the RAM as 4 buffers of 16KB each.

To enable this mode add the value BIG_PKTBUF_MODE to the OR'd options passed to mimo_ofdmRx_setOptions().

You will also need to update any part of the code that assume 2KB boundaries for the packet buffers. I think the only place in warpmac/warpphy that assumes this is warpphy_getBuffAddr().

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