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Re: [Discuss-gnuradio] USRP2 VRT support

From: Josh Blum
Subject: Re: [Discuss-gnuradio] USRP2 VRT support
Date: Mon, 28 Dec 2009 17:21:36 -0500
User-agent: Thunderbird (X11/20090817)

Tim Pearce wrote:

The USRP2 doesn't respond when loaded with the firmware at:

I've just run find_usrps -e eth1 with wireshark running and can only see the
outgoing packet:

1    0.000000    Toshiba_b4:52:54    Broadcast    0xbeef    Ethernet II

Given the transport type is the old (I think) 0xbeef I guess this is wrong,
I'm just about to recheckout the source code and compile again, but "vrt" is
a directory present in where I compiled gnuradio from - I've just double
checked by:

The vrt directory was there prior to this work. A good way to verify that you pulled in the right branch would be to check usrp2/firmware/include/usrp2_eth_packet.h and see that it has the following defines:

#define U2_DATA_ETHERTYPE               0xBEEF  // used in our data frames
#define U2_CTRL_ETHERTYPE               0xBEF0  // used in our control frames

Thats where the firmware and host code gets the ethernet transport type from.


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