Re: [Discuss-gnuradio] ImportError: cannot import name usrp

[Kyeong Su Shin]

Hello Laura (and to whom it may concern),

I believe that what you have there are legacy codes which use libusrp, instead of libuhd. libusrp has been replaced by libuhd a few years ago.

As Nate suggested, please replace all blocks with on libusrp to libuhd. It shouldn't be too hard. (see: https://www.gnuradio.org/doc/sphinx-v3.7.9.2/uhd_blocks.html#gnuradio.uhd.usrp_sink , https://www.gnuradio.org/doc/sphinx-v3.7.9.2/uhd_blocks.html#gnuradio.uhd.usrp_source )

For the interpolation rate, I think you can replace that with set_samp_rate (not too sure, though) as I am not particularly familiar with libusrp).

Regards,

Kyeong Su Shin

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보낸 사람: Laura Arjona <address@hidden> 대신 Discuss-gnuradio <discuss-gnuradio-bounces+ksshin=address@hidden>
보낸 날짜: 2019년 10월 15일 화요일 오전 4:58
받는 사람: Nate Temple <address@hidden>
참조: GNURadio Discussion List <address@hidden>
제목: Re: [Discuss-gnuradio] ImportError: cannot import name usrp

 

of course, thank you.

This is the code (old) I am trying to adapt to use it.

       tx = usrp.sink_c(fusb_block_size = 1024, fusb_nblocks=8)
        tx.set_interp_rate(interp_rate)
        tx_subdev = (0,0)
        tx.set_mux(usrp.determine_tx_mux_value(tx, tx_subdev))
        subdev = usrp.selected_subdev(tx, tx_subdev)
        subdev.set_enable(True)
        subdev.set_gain(subdev.gain_range()[2])
        t = tx.tune(subdev.which(), subdev, freq)

On Fri, Oct 11, 2019 at 1:39 PM Nate Temple <address@hidden> wrote:

Can you post the code in question?

On Fri, Oct 11, 2019 at 1:32 PM Laura Arjona <address@hidden> wrote:

Thank you Nate.

Yes, that is the configuration I had before. But I using someone else's code for a different USRP, and getting errors with the usrp_sink_c to set the fusb block size

On Fri, Oct 11, 2019 at 1:28 PM Nate Temple <address@hidden> wrote:

You should pass in the cpu_format as an arg such as below:

sink = uhd.usrp_sink(
        ",".join(("", "")),
        uhd.stream_args(
        cpu_format="fc32",
        channels=range(1),
        ),
        )

On Fri, Oct 11, 2019 at 1:16 PM Laura Arjona <address@hidden> wrote:

Got it, thank you!

However, usrp_sink_c is not supported anymore? Get an error there too.

tx = usrp_sink_c(fusb_block_size = 1024, fusb_nblocks=8)

On Fri, Oct 11, 2019 at 1:11 PM Nate Temple <address@hidden> wrote:

Hi Laura,

It should be:

from gnuradio import uhd

source = uhd.usrp_source(...)

...

I would suggest to try building out a basic flowgraph in GRC and then use the generate button and checkout the source made from it.

Regards,

Nate Temple

On Fri, Oct 11, 2019 at 1:06 PM Laura Arjona <address@hidden> wrote:

Hello,

I am using a usrp b200-mini, and I am trying to define the sink as follows:

tx = usrp_sink_c(fusb_block_size = 1024, fusb_nblocks=8)

However, I get the error

 from gnuradio import usrp
ImportError: cannot import name usrp

I believe my GNU-radio installation is correct.

Any clue of how to fix this?

Thank you.

--

Laura Arjona 

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--

Laura Arjona 

Washington Research Foundation Innovation Postdoctoral Fellow in Neuroengineering

Paul G. Allen School of Computer Science & Engineering

185 E Stevens Way NE

University of Washington

Seattle, WA 98195-2350

--

Laura Arjona 

Washington Research Foundation Innovation Postdoctoral Fellow in Neuroengineering

Paul G. Allen School of Computer Science & Engineering

185 E Stevens Way NE

University of Washington

Seattle, WA 98195-2350

--

Laura Arjona 

Washington Research Foundation Innovation Postdoctoral Fellow in Neuroengineering

Paul G. Allen School of Computer Science & Engineering

185 E Stevens Way NE

University of Washington

Seattle, WA 98195-2350