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Re: [Discuss-gnuradio] Booting a new USRP

From: Eric Blossom
Subject: Re: [Discuss-gnuradio] Booting a new USRP
Date: Fri, 11 Feb 2005 13:20:11 -0800
User-agent: Mutt/1.5.6i

On Fri, Feb 11, 2005 at 01:15:54PM -0500, Rahul Dhar wrote:
> Charles,
> On Fri, Feb 11, 2005 at 09:57:04AM -0800, cfk wrote:
> > Dear Rahul
> >  The program test_fusb is not installed in the computer's path. I can be 
> > found 
> > in ../usrp/host/apps along with several others such as 
> > test_usrp_standard_tx 
> > and test_usrp_standard_rx. In all three cases these programs are invoked by 
> > navigating to the ../usrp/host/apps directory and typing:
> > 
> > ./test_usrp_standard_tx
> > 
> > The "./" means execute the program in the current directory and not to 
> > search 
> > the computer's path. You can see your path with the command "echo $PATH" 
> > from 
> > a terminal prompt.
> As I said, test_fusb isn't anywhere on my hard disk (or find was lying
> to me).  Anyways, I ran test_usrp_standard_tx and got the following:
> TX d'board A: <none>
> TX d'board B: <none>
> tx_underrun
> tx_underrun
> tx_underrun
> tx_underrun
> tx_underrun
> xfered 5.37e+08 bytes in 16.8 seconds.  3.2e+07 bytes/sec.  cpu time =
> 1.93
> 5 underruns

This looks fine.

> I'm assuming this means the firmware was uploaded properly..  LED0's
> blinking rate slowed to about 1 Hz, as expected.  However, LED1 doesn't
> seem to work.  "usrper led1 on" doesn't do anything.  "usrper led0 on",
> however, makes LED0 turn back on sooner than it should, and it then
> resumes blinking at 1 Hz.  led0 off does the opposite.
> "./usrper 9862a_read 1" also works as expected.
> Is there something additional I need to do to get LED1 working?

No.  Don't worry about it.

The usrper command twiddles some very low level stuff.  
It's not a tool for everyday use.  

Take a look at the examples in gnuradio-example/python/usrp*

usrp_siggen.py is a siggen with no gui.
usrp_fft.py plots the FFT of whatever's connected to the input.

$ usrp_siggen.py --help
$ usrp_fft.py --help

Using usrp_siggen.py you should be able to see your waveform with a
scope attached to the SMA connectors.


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