I believe I am enabling the appropriate oe registers using the following commands u = usrp.source_c(0,decim_rate=8,fpga_filename="mytestfile.rbf") subdev = usrp.selected_subdev(u,(1,0)) # for getting signals from slot B TV_RX u._write_oe(0,0xffff,oxffff) # for enabling A side Basic RX u._write_fpga_reg(FR_DEBUG_EN, bmFR_DEBUG_EN_RX_A)
However, I am perplexed as to why bb_rx_i0 or bb_rx_q0 do not seem to toggle. When I connect ddc0_in_i signals I can see them toggling. I must be doing something really stupid because the rbf file I generated works well with a standard example like usrp_fft.py. So the data path from the ADC to the USB is working well. But somehow I am not able to tap into the I and Q signals out of the receive_chain and see them toggling. In the usrp_std.v file what signals do you recommend to look at the 16 bits I and Q out of the HB filter of the receive_chain? Thanks again for you time and help. Nirali > -----Original Message----- > From: Johnathan Corgan [mailto:[EMAIL PROTECTED] > Sent: Friday, November 02, 2007 11:56 AM > To: Nirali Patel > Cc: discuss-gnuradio@gnu.org > Subject: Re: [Discuss-gnuradio] I and Q samples out of FPGA receive chain > > Nirali Patel wrote: > > > However I do not see any outputs when I connect these signals to the > > debug pins using debug_0(bb_rx_q0),.debug_1(bb_rx_i0). > > When routing signals through the master_controller debug ports, you'll > need to (on the host at runtime) enable the debug output register, and > set the IO pins as outputs. > > HOWEVER--don't EVER do this unless you are using a BasicRX/TX or LFRX/TX > board in the slots. You can damage the daughterboard, USRP FPGA, or > both otherwise. > > -- > Johnathan Corgan > Corgan Enterprises LLC > http://corganenterprises.com _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio