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Re: [Discuss-gnuradio] MSB

From: Eric Blossom
Subject: Re: [Discuss-gnuradio] MSB
Date: Thu, 15 Mar 2007 08:10:23 -0700
User-agent: Mutt/1.5.9i

On Thu, Mar 15, 2007 at 03:20:43PM +0100, Davide Anastasia wrote:
> Il giorno gio, 15/03/2007 alle 07.12 -0700, Eric Blossom ha scritto:
> > On Thu, Mar 15, 2007 at 11:16:03AM +0100, Davide Anastasia wrote:
> > > Hi List,
> > > what is the MSB on USB bus between USRP and the host?
> >
> > Data is passed across the USB in little-endian byte order. 
> So, If I need to give the sign of a sample, I'll take the most left bit?
> -- 
> Davide Anastasia


In the code that we distribute, yes.  However, I think you're asking
about the code that you have been modifying in the FPGA.  You're in
charge of that part.  What are you doing?

In the unmodified code, we push 16-bit I & Q across the interface to
the FX2 and from there to the host.  The data comes out I first, then
Q, and each 16-bit value is little-endian byte order.

Hope this helped.


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