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| From: | Marcus D. Leech |
| Subject: | Re: [Discuss-gnuradio] howto select subdev with USRP1 |
| Date: | Sat, 25 May 2013 13:58:29 -0400 |
| User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.24) Gecko/20111108 Fedora/3.1.16-1.fc14 Thunderbird/3.1.16 |
On 05/25/2013 11:55 AM, Wolfgang Buesser wrote:
If you use GRC to do these things, it'll get stuff in the right order, which you can "crib" from, even if you don't end up using the resulting GRC-generatedOn Sa, 2013-05-25 at 10:56 -0400, Marcus D. Leech wrote:On 05/25/2013 10:45 AM, Wolfgang Buesser wrote:On Sa, 2013-05-25 at 10:15 -0400, Marcus D. Leech wrote:On 05/25/2013 03:28 AM, Wolfgang Buesser wrote:Hi I am having problems selecting the subdev with USRP1: My USRP1 is populated with 2 LFRX and 2 LFTX. I am trying the following code: ------------------------------------------ #!/usr/bin/python from gnuradio import gr from gnuradio import uhd from gnuradio.eng_option import eng_option class build_block(gr.top_block): def __init__(self): gr.top_block.__init__(self) self.u_tx = uhd.usrp_sink("serial=47432785",uhd.stream_args('fc32')) self.u_tx.set_samp_rate(8.0e6) self.tx_src0 = gr.sig_source_c(self.u_tx.get_samp_rate(),gr.GR_CONST_WAVE,0, 1.0, 0) self.u_tx.set_center_freq(10e6) # self.u_tx.set_subdev_spec("A:AB",0) self.connect (self.tx_src0, self.u_tx) def main (): tb = build_block () tb.start () raw_input ('Press Enter to quit: ') if __name__ == '__main__': main () ---------------------------------------- This way I get I- and Q- Signals out of TXB. With the subdev_spec uncommented I get nothing - neither TXA, not TXB. With self.u_tx.set_subdev_spec("B:AB",0) I again only get TXB. What do I Have to configure to get signals only from TXA? Thanks Wolfgang _______________________________________________ Discuss-gnuradio mailing list address@hidden https://lists.gnu.org/mailman/listinfo/discuss-gnuradioWhat does uhd_usrp_probe --args "type=usrp1" return?This is what I get from uhd_usrp_probe --args "type=usrp1" linux; GNU C++ version 4.7.2 20130108 [gcc-4_7-branch revision 195012]; Boost_104900; UHD_003.005.002-61-g08624153 -- Opening a USRP1 device... -- Using FPGA clock rate of 64.000000MHz... _____________________________________________________ / | Device: USRP1 Device | _____________________________________________________ | / | | Mboard: USRP1 | | serial: 47432785 | | | | Time sources: none | | Clock sources: internal | | Sensors: | | _____________________________________________________ | | / | | | RX DSP: 0 | | | Freq range: -32.000 to 32.000 Mhz | | _____________________________________________________ | | / | | | RX DSP: 1 | | | Freq range: -32.000 to 32.000 Mhz | | _____________________________________________________ | | / | | | RX Dboard: A | | | ID: LF RX (0x000f) | | | _____________________________________________________ | | | / | | | | RX Frontend: AB | | | | Name: LFRX (AB) | | | | Antennas: | | | | Sensors: | | | | Freq range: -32.000 to 32.000 Mhz | | | | Gain Elements: None | | | | Connection Type: IQ | | | | Uses LO offset: No | | | _____________________________________________________ | | | / | | | | RX Frontend: BA | | | | Name: LFRX (BA) | | | | Antennas: | | | | Sensors: | | | | Freq range: -32.000 to 32.000 Mhz | | | | Gain Elements: None | | | | Connection Type: QI | | | | Uses LO offset: No | | | _____________________________________________________ | | | / | | | | RX Frontend: A | | | | Name: LFRX (A) | | | | Antennas: | | | | Sensors: | | | | Freq range: -32.000 to 32.000 Mhz | | | | Gain Elements: None | | | | Connection Type: I | | | | Uses LO offset: No | | | _____________________________________________________ | | | / | | | | RX Frontend: B | | | | Name: LFRX (B) | | | | Antennas: | | | | Sensors: | | | | Freq range: -32.000 to 32.000 Mhz | | | | Gain Elements: None | | | | Connection Type: Q | | | | Uses LO offset: No | | | _____________________________________________________ | | | / | | | | RX Codec: A | | | | Name: ad9522 | | | | Gain range pga: 0.0 to 20.0 step 1.0 dB | | _____________________________________________________ | | / | | | RX Dboard: B | | | ID: LF RX (0x000f) | | | _____________________________________________________ | | | / | | | | RX Frontend: AB | | | | Name: LFRX (AB) | | | | Antennas: | | | | Sensors: | | | | Freq range: -32.000 to 32.000 Mhz | | | | Gain Elements: None | | | | Connection Type: IQ | | | | Uses LO offset: No | | | _____________________________________________________ | | | / | | | | RX Frontend: BA | | | | Name: LFRX (BA) | | | | Antennas: | | | | Sensors: | | | | Freq range: -32.000 to 32.000 Mhz | | | | Gain Elements: None | | | | Connection Type: QI | | | | Uses LO offset: No | | | _____________________________________________________ | | | / | | | | RX Frontend: A | | | | Name: LFRX (A) | | | | Antennas: | | | | Sensors: | | | | Freq range: -32.000 to 32.000 Mhz | | | | Gain Elements: None | | | | Connection Type: I | | | | Uses LO offset: No | | | _____________________________________________________ | | | / | | | | RX Frontend: B | | | | Name: LFRX (B) | | | | Antennas: | | | | Sensors: | | | | Freq range: -32.000 to 32.000 Mhz | | | | Gain Elements: None | | | | Connection Type: Q | | | | Uses LO offset: No | | | _____________________________________________________ | | | / | | | | RX Codec: B | | | | Name: ad9522 | | | | Gain range pga: 0.0 to 20.0 step 1.0 dB | | _____________________________________________________ | | / | | | TX DSP: 0 | | | Freq range: -44.000 to 44.000 Mhz | | _____________________________________________________ | | / | | | TX DSP: 1 | | | Freq range: -44.000 to 44.000 Mhz | | _____________________________________________________ | | / | | | TX Dboard: A | | | ID: LF TX (0x000e) | | | _____________________________________________________ | | | / | | | | TX Frontend: AB | | | | Name: LFTX (AB) | | | | Antennas: | | | | Sensors: | | | | Freq range: -32.000 to 32.000 Mhz | | | | Gain Elements: None | | | | Connection Type: IQ | | | | Uses LO offset: No | | | _____________________________________________________ | | | / | | | | TX Frontend: BA | | | | Name: LFTX (BA) | | | | Antennas: | | | | Sensors: | | | | Freq range: -32.000 to 32.000 Mhz | | | | Gain Elements: None | | | | Connection Type: QI | | | | Uses LO offset: No | | | _____________________________________________________ | | | / | | | | TX Frontend: A | | | | Name: LFTX (A) | | | | Antennas: | | | | Sensors: | | | | Freq range: -32.000 to 32.000 Mhz | | | | Gain Elements: None | | | | Connection Type: I | | | | Uses LO offset: No | | | _____________________________________________________ | | | / | | | | TX Frontend: B | | | | Name: LFTX (B) | | | | Antennas: | | | | Sensors: | | | | Freq range: -32.000 to 32.000 Mhz | | | | Gain Elements: None | | | | Connection Type: Q | | | | Uses LO offset: No | | | _____________________________________________________ | | | / | | | | TX Codec: A | | | | Name: ad9522 | | | | Gain range pga: -20.0 to 0.0 step 0.1 dB | | _____________________________________________________ | | / | | | TX Dboard: B | | | ID: LF TX (0x000e) | | | _____________________________________________________ | | | / | | | | TX Frontend: AB | | | | Name: LFTX (AB) | | | | Antennas: | | | | Sensors: | | | | Freq range: -32.000 to 32.000 Mhz | | | | Gain Elements: None | | | | Connection Type: IQ | | | | Uses LO offset: No | | | _____________________________________________________ | | | / | | | | TX Frontend: BA | | | | Name: LFTX (BA) | | | | Antennas: | | | | Sensors: | | | | Freq range: -32.000 to 32.000 Mhz | | | | Gain Elements: None | | | | Connection Type: QI | | | | Uses LO offset: No | | | _____________________________________________________ | | | / | | | | TX Frontend: A | | | | Name: LFTX (A) | | | | Antennas: | | | | Sensors: | | | | Freq range: -32.000 to 32.000 Mhz | | | | Gain Elements: None | | | | Connection Type: I | | | | Uses LO offset: No | | | _____________________________________________________ | | | / | | | | TX Frontend: B | | | | Name: LFTX (B) | | | | Antennas: | | | | Sensors: | | | | Freq range: -32.000 to 32.000 Mhz | | | | Gain Elements: None | | | | Connection Type: Q | | | | Uses LO offset: No | | | _____________________________________________________ | | | / | | | | TX Codec: B | | | | Name: ad9522 | | | | Gain range pga: -20.0 to 0.0 step 0.1 dBIf you swap the TXA/TXB cards, what happens?It looks I have just found the 'solution': If I put the set_subdev_spec above the set_center-freq I can select between TXA(I&Q) and TXB(I&Q). I guess I really don't understand how it all works. Thanks Wolfgang
flow-graph. -- Marcus Leech Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org
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