Has anyone tried this recently? I've updated to latest cvs and when I run
usrp_fft.py with the -8 option I get the following error:
Traceback (most recent call last):
File "./usrp_fft.py", line 220, in ?
main ()
File "./usrp_fft.py", line 216, in main
app = stdgui.stdapp(app_flow_graph, "USRP FFT", nstatus=1)
File
"/home/base2it/gr/lib/python2.3/site-packages/gnuradio/wxgui/stdgui.py",
line 36, in __init__
wx.App.__init__ (self, redirect=False)
File
"/home/base2it/gr/lib/python2.3/site-packages/wx-2.6-gtk2-ansi/wx/_core.py",
line 7473, in __init__
self._BootstrapApp()
File
"/home/base2it/gr/lib/python2.3/site-packages/wx-2.6-gtk2-ansi/wx/_core.py",
line 7125, in _BootstrapApp
return _core_.PyApp__BootstrapApp(*args, **kwargs)
File
"/home/base2it/gr/lib/python2.3/site-packages/gnuradio/wxgui/stdgui.py",
line 39, in OnInit
frame = stdframe (self.flow_graph_maker, self.title, self._nstatus)
File
"/home/base2it/gr/lib/python2.3/site-packages/gnuradio/wxgui/stdgui.py",
line 60, in __init__
self.panel = stdpanel (self, self, flow_graph_maker)
File
"/home/base2it/gr/lib/python2.3/site-packages/gnuradio/wxgui/stdgui.py",
line 81, in __init__
self.fg = flow_graph_maker (frame, self, vbox, sys.argv)
File "./usrp_fft.py", line 70, in __init__
format = self.u.make_format(width, shift)
File "/home/base2it/gr/lib/python2.3/site-packages/gnuradio/usrp.py", line
212, in __getattr__
return getattr(self._u, name)
AttributeError: 'usrp1_source_c_sptr' object has no attribute 'make_format'
----Original Message Follows----
From: Eric Blossom <[EMAIL PROTECTED]>
To: Lamar Owen <[EMAIL PROTECTED]>
CC: discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] byte-wide ADC transfers
Date: Mon, 16 Jan 2006 17:48:33 -0800
On Mon, Jan 16, 2006 at 07:00:43PM -0500, Lamar Owen wrote:
> On Monday 16 January 2006 18:24, Clark Pope wrote:
> > I believe somebody was working on modifying the USRP fpga so that it
would
> > stream 8-bits I and 8-bits Q instead of 16-bit to get a wider bandwidth
> > into the PC? Is this in the latest CVS for the fpga? Any instructions
on
> > how to use it?
>
> Yes, this is in the latest, as well as the last release version of the
USRP
> code. See host/lib/usrp_standard.h under the section about the Rx data
> format for details.
>
> See the latest usrp_fft.py in the gnuradio examples for how to use it
from a
> high level. See the gr-usrp stuff for a lower level usage.
> --
> Lamar Owen
That's all correct. However, the current FPGA code does not implement
proper rounding to 8-bits, which results in a big DC component.
Eric
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