I've figured it out. It turns out that the B200 wasn't getting enough power from the USB 2.0 port I was using on the Tegra. When I plugged in external power, it worked!
On Thu, Dec 28, 2017 at 6:30 PM, Philip Balister <phi...@balister.org> wrote: > Try strace uhd_usrp_probe > > and see if you can see which system call returns -EPERM. Yes this is a > hail mary operation. > > Philip > > On 12/28/2017 01:13 PM, Michael Don via USRP-users wrote: > > I'm still getting the same error with the USB 2.0 for the B200 on my > tegra > > system. > > > > Using lsusb I can see the B200 listed as: > > > > Bus 001 Device 031: ID 2500:0020 > > > > I can then find /dev/bus/usb/001/031 and verify that it has the correct > > permissions: > > > > crw-rw-rw- 1 root flirimaging 189, 30 Dec 28 18:04 031 > > > > Just to test things out, I've even changed the permissions, reloaded the > > udev rules, and noted that the permissions change back. > > > > So in spite of verifying the B200 permissions, I still get the same error > > listed in my original email. Does anyone have any other suggestions? > > > > -Mike > > > > > > On Fri, Dec 22, 2017 at 3:13 PM, Michael Don <miked...@gmail.com> wrote: > > > >> Marcus, > >> > >> Yes, "sudo udevadm control --reload-rules" is included in the "Setup > Udev for USB" instructions. I also tried replugging in the unit. I'll try > debugging some more and let you know if I come up with anything. > >> > >> Philip - thanks for letting me know about the acceleration, once I get > things working I may ask you more about it. > >> > >> -Mike > >> > >> > >> On Tue, Dec 19, 2017 at 7:58 PM, Philip Balister via USRP-users < > >> usrp-users@lists.ettus.com> wrote: > >> > >>> On 12/19/2017 06:44 PM, Marcus D. Leech via USRP-users wrote: > >>>> On 12/19/2017 05:09 PM, Michael Don via USRP-users wrote: > >>>>> > >>>>> I've build and installed UHD 3.10.1.1 on a Tegra TX2 (ARM64 > >>>>> platform). The USB 3.0 is working, but I'm getting errors with the > >>>>> USB 2.0 on a USRP B200. > >>> > >>> I know UHD works on several aarch64 platforms. I do carry a patch in > >>> meta-sdr that enables neon acceleration for the uhd type convertors. > >>> > >>> Philip > >>> > >>>>> > >>>>> uhd_find_devices works, but uhd_usrp_probe, and the uhd application > >>>>> examples give the error below. Note that I've tried running with > >>>>> sudo, and have followed the instructions "Setup Udev for USB" about > >>>>> the uhd-usrp.rules file. Any advice? > >>>>> > >>>>> Thanks, -Mike > >>>>> > >>>>> > >>>>> linux; GNU C++ version 5.4.0 20160609; Boost_105800; > >>>>> UHD_003.010.001.001-0-unknown > >>>>> > >>>>> -- Detected Device: B200 > >>>>> -- Operating over USB 2. > >>>>> -- Initialize CODEC control... > >>>>> > >>>>> UHD Error: > >>>>> An unexpected exception was caught in a task loop. > >>>>> The task loop will now exit, things may not work. > >>>>> EnvironmentError: IOError: usb rx8 transfer status: > >>>>> LIBUSB_TRANSFER_ERROR > >>>>> -- Detected bad USB state; resetting. > >>>>> > >>>>> UHD Error: > >>>>> USB open failed: insufficient permissions. > >>>>> See the application notes for your device. > >>>>> Error: AssertionError: libusb_open(_dev->get(), &_handle) == 0 > >>>>> in > >>>>> libusb_device_handle_impl::libusb_device_handle_impl(uhd:: > >>> transport::libusb::device::sptr) > >>>>> > >>>>> at > >>>>> /home/nvidia/Documents/USB3/uhd-release_003_010_001_001/host > >>> /lib/transport/libusb1_base.cpp:261 > >>>>> > >>>>> > >>>>> > >>>>> > >>>> > >>>> Did you: > >>>> > >>>> sudo udevadm control --reload-rules > >>>> > >>>> After installing the usrp rules file? > >>>> > >>>> Did you unplug/replug, after updating the rules? The rules are only > >>>> *triggered* when a USB device event happens, so if it's still plugged > in > >>>> when you change > >>>> the rules, nothing will happen until you re-plug. > >>>> > >>>> > >>>> > >>>> > >>>> _______________________________________________ > >>>> USRP-users mailing list > >>>> USRP-users@lists.ettus.com > >>>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com > >>>> > >>> > >>> _______________________________________________ > >>> USRP-users mailing list > >>> USRP-users@lists.ettus.com > >>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com > >>> > >> > >> > > > > > > > > _______________________________________________ > > USRP-users mailing list > > USRP-users@lists.ettus.com > > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com > > >
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