RE: [Discuss-gnuradio] I and Q samples out of FPGA receive chain
Jonathan, Thanks for your response. I can see the ch0rx signal toggling on my Basic RX in slot A using the following command u = usrp.source_c(0,decim_rate=8,fpga_filename=mytestfile.rbf) u._write_oe(0,0x,ox)# for enabling A side Basic RX u._write_fpga_reg(FR_DEBUG_EN, bmFR_DEBUG_EN_RX_A) How do I modify the _write_oe command in order to output enable a Basic TX also on side A? If I use u._write_fpga_reg(FR_DEBUG_EN, bmFR_DEBUG_EN_RX_A | bmFR_DEBUG_EN_TX_A) it does not enable the Basic TX on side A. Thanks again for the help! Nirali -Original Message- From: Johnathan Corgan [mailto:[EMAIL PROTECTED] Sent: Monday, November 05, 2007 10:46 AM To: Nirali Patel Cc: discuss-gnuradio@gnu.org Subject: Re: [Discuss-gnuradio] I and Q samples out of FPGA receive chain On 11/2/07, Nirali Patel [EMAIL PROTECTED] wrote: 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 Use the ch0rx and ch1rx signals that go into the rx_buffer. -- Johnathan Corgan Corgan Enteprises LLC http://corganenterprises.com/ ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] I and Q samples out of FPGA receive chain
On 11/6/07, Nirali Patel [EMAIL PROTECTED] wrote: If I use u._write_fpga_reg(FR_DEBUG_EN, bmFR_DEBUG_EN_RX_A | bmFR_DEBUG_EN_TX_A) it does not enable the Basic TX on side A. You haven't enabled TX_A debug pins as outputs. -- Johnathan Corgan Corgan Enterprises LLC http://corganenterprises.com/ ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
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
RE: [Discuss-gnuradio] I and Q samples out of FPGA receive chain
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(0,0x,ox)# 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
