hackrf_info , SopySDRUtil, gr-soapy different results for lisusb_claim_interface

[smileyrekiere]

What would you like to know?

gr-soapy question for hackrf

Using SoapySDR, SoapyHackrf, hackrf-2023.01.01, gr-soapy from gnuradio build from source. C++ and C (edited hackrf with prints).

gr-soapy: libusb_claim_interface result: -6 (resource busy) SoapySDRUtil: lisusb_claim_interface result: 0 hackrf_info: lisusb_claim_interface result: 0

/* Resource busy / LIBUSB_ERROR_BUSY = -6,

hackrf_info succeeded

hackrf_info version: git-6211fbb0 libhackrf version: git-6211fbb0 (0.8) Found HackRF Index: 0 Serial number: 0000000000000000675c62dc302565cf libusb_get_configuration result: 0 set_hackrf_configuration result: 0 lisusb_claim_interface result: 0 Board ID Number: 4 (HackRF One) Firmware Version: 2023.01.1 (API:1.07) Part ID Number: 0xa000cb3c 0x00664f63 Hardware Revision: r9 Hardware appears to have been manufactured by Great Scott Gadgets. Hardware supported by installed firmware: HackRF One

SoapySDRUtil succeeded

user@user:~/git/gnuradio_git/fosdem/hackrf_sink/build$ SoapySDRUtil --probe ######################################################

Soapy SDR -- the SDR abstraction library

######################################################

Probe device libusb_get_configuration result: 0 set_hackrf_configuration result: 0 lisusb_claim_interface result: 0 [INFO] Opening HackRF One #0 675c62dc302565cf... Desired_serial_number: 0000000000000000675c62dc302565cf usb_list_len: 10 usb device: 0000000000000000675c62dc302565cf libusb_get_configuration result: 0 set_hackrf_configuration result: 0 lisusb_claim_interface result: 0

gr-soapy failed user@user:~/git/gnuradio_git/fosdem/hackrf_sink/build$ ./hackrf_sink libusb_get_configuration result: 0 set_hackrf_configuration result: 0 lisusb_claim_interface result: 0 [ERROR] hackrf_exit() failed -- one or more HackRFs still in use [ERROR] SoapySDR::Device::enumerate(hackrf) stoi Desired_serial_number: 0000000000000000675c62dc302565cf usb_list_len: 10 usb device: 0000000000000000675c62dc302565cf libusb_get_configuration result: 0 set_hackrf_configuration result: 0 lisusb_claim_interface result: -6 [INFO] Could not Open HackRF Device: 0000000000000000675c62dc302565cf dev: (null) ret: -1000 [ERROR] hackrf_exit() failed -- one or more HackRFs still in use terminate reached from thread id: 7fdfd4e2cb80Got std::runtime_error hackrf open failed

So why does lisusb_cliam_interface fail with gr-soapy ? All scripts run in user space.

Any insight would be helpful

[martinling]

This error happens when the interface is already opened by another program. Did you have more than one program open at once that might have been trying to use the same device?

[smileyrekiere]

Martinling - thankyou

In investigating if there was another program running added print statements to the hackrf.cc and SoapyHackRF code. Noticed between the working and non-working code that kwargs for the device in gr-soapy needed to be for the device "device=hackrf" , previously had it set to "hackrf" . The gr-soapy (and SoapyHackRF) had discovered the device because had set dev_args to "serial=0000000000000000675c62dc302565cf" so the hackrf could be discovered.

So to claim the interface "device=hackrf" needed to be set.

[smileyrekiere]

Closing: for gr-soapy need to have kwargs use "key value pairs" in C++ as is done in python from what I can tell.