Re: [Discuss-gnuradio] FPGA .rbf file

[Eric Blossom]

On Wed, Aug 01, 2007 at 03:34:56PM -0700, Michael P Buettner wrote:
> >On Tue, May 08, 2007 at 10:59:33AM -0400, Steven Clark wrote:
> >> Hi all-
> >> 
> >> I noticed that both the usrp.source and usrp.sink blocks have the 
> >ability to
> >> specify the .rbf bit file for the FPGA.
> >> 
> >> Does that mean that in the following:
> >> 
> >> 
> >> self.usrp_in = usrp.source_c (fpga_filename="file_A.rbf")
> >>self.usrp_out = usrp.sink_c (fpga_filename="file_B.rbf")
> >>
> >>
> >>Only file_B has any effect? When does the file get loaded?
> 
> >Last one wins.  It gets loaded in the constructor.
> 
> >Eric
> 
> Is this true?  I have an application that has both a usrp.source_c and a 
> usrp.sink_c.  If I use the "fpga_filename" parameter for only one of those 
> calls, the receive channel does not work and I see a continuous stream of 
> 'u0s'. However, if I use specify the same rbf in both calls, all is well.
> 
> michael

You definitely want to specify the same one in both constructors.
When I said the last one wins, I meant that.  The second one stomps the
initialization from the first one...

Eric