On Mon, Feb 16, 2009 at 1:35 AM, Einar Thorsrud <eina...@stud.ntnu.no>wrote:
> Hi all helpful GR people :)
>
> I am trying to combine the two sub device on a LFRX card, but I can not
> find any documentation on the USRP dual source. GRC has it's own block
> "grc_usrp.dual_source_c", but using this (configured with GRC) I get the
> error:
>
> TypeError: __init__() got an unexpected keyword argument 'side_b'
>
> How can this be overcome?
>
> I am not able to find a dual source from the plain GR library, but it may
> exist? However, I have tried to use two separate USRP sources and specify
> separate sub devices on the two:
>
> This however also fails. It seams the reason is that the USRP is already
> taken by the first instance:
>
> usrp_open_interface:usb_claim_interface: failed interface 2
> usb_claim_interface: couldn't claim interface
> usrp_basic_rx: can't open rx interface
>
> What then is the correct way to receive on both sub devices on the same
> time?
>
>
> - Einar
>
>
I Use 2 LFRX boards to get 4 channels (for only 2 channels you don't have to
do anything special as the default image handles that automatically) of real
data each sampled at 2Msps. Here is the python code to do that. I think you
are looking for the second line.
self.rx_src = usrp.source_c(fpga_filename="std_4rx_0tx.rbf")
rx_subdev = self.rx_src.db[0]+self.rx_src.db[1]
self.rx_src.set_mux(gru.hexint(0xf3f2f1f0)) #Sets all Q to zero
deinterleaver_usrp = gr.deinterleave(gr.sizeof_gr_complex)
self.connect(self.rx_src,skip_head_0,deinterleaver_usrp)
Real [(deinterleaver_usrp,0)] --> SideAA
Real [(deinterleaver_usrp,1)] --> SideAB
Real [(deinterleaver_usrp,2)] --> SideBA
Real [(deinterleaver_usrp,3)] --> SideBB
Hope that helps.
Karthik
_______________________________________________
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
