LimeSDR Mini - gnb not detecting the radio

[maronows]

Hi,

I'm aware it's not officially supported (read #699). I followed suggestion from 699 and I'm using SoapyUHD and uhd is able to detect the board:

marcin@marcin-Macmini:~/devel/srsRAN_Project$ uhd_find_devices
[INFO] [UHD] linux; GNU C++ version 11.4.0; Boost_107400; UHD_4.9.0.0-0ubuntu1~jammy3
--------------------------------------------------
-- UHD Device 0
--------------------------------------------------
Device Address:
serial: 1D3AD5E0E2D1DB
addr: 0403:601f
addr: 24607:1027
driver: lime
driver: limesuiteng
label: LimeSDR Mini [USB 3.0] 1D3AD5E0E2D1DB
label: LimeSDR Mini [USB3.0] 1D3AD5E0E2D1DB
media: USB 3.0
media: USB3.0
module: FT601
name: LimeSDR Mini
type: soapy

However, when starting the gnb, I'm getting an error:

marcin@marcin-Macmini:~/devel/srsRAN_Project$ sudo gnb -c configs/amf.yml -c configs/gnb.yaml --log.all_level=debug

--== srsRAN gNB (commit cdc93a6) ==--

Lower PHY in dual baseband executor mode.
Warning: With the given prach_frequency_start=0, the PRACH opportunities overlap with the PUCCH resources/guardband in prbs=[0, 11). Some interference between PUCCH and PRACH should be expected
Available radio types: uhd.
[INFO] [UHD] linux; GNU C++ version 11.4.0; Boost_107400; UHD_4.9.0.0-0ubuntu1~jammy3
[INFO] [LOGGING] Fastpath logging disabled at runtime.
[DEBUG] [MPMD] Discovering MPM devices on port 49600
[DEBUG] [MPMD] Discovering MPM devices on port 49600
[DEBUG] [MPMD] Discovering MPM devices on port 49600
Error: no radio devices found.
Failed to open device with address 'soapy=0':
srsRAN ERROR: Unable to create radio session.

At this time I'm using simple config, just to get it running:

marcin@marcin-Macmini:~/devel/srsRAN_Project$ cat configs/gnb.yaml
ru_sdr:
device_driver: uhd
device_args: "soapy=0"
srate: 61.44 # Sample rate in MHz (adjust for your band)
tx_gain: 50 # dB, tune based on tests (0-89 for Mini)
rx_gain: 60 # dB

cell_cfg:
dl_arfcn: 625000
band: 78
channel_bandwidth_MHz: 20
common_scs: 30
plmn: "99970"
tac: 7
pci: 1
prach:
prach_config_index: 159
prach_root_sequence_index: 1
zero_correlation_zone: 0
prach_frequency_start: 0
tdd_ul_dl_cfg:
nof_dl_slots: 7
nof_ul_slots: 2

log:
filename: gnb.log
all_level: debug

I tried to add "driver=lime" or "driver=limesuiteng", but the results were the same.

Any idea what I can change or check to make it work?

[maronows]

An own update. Looks like running gnb as non root gives more info ;)

`marcin@marcin-Macmini:~/devel/srsRAN_Project$ gnb -c configs/gnb.yaml -c configs/amf.yml

--== srsRAN gNB (commit cdc93a6) ==--

srsLog error - Unable to create log file "gnb.log": Permission denied
Warning: Scheduling priority of thread "main_pool#0" not changed. Cause: Not enough privileges.
Lower PHY in dual baseband executor mode.
Warning: Scheduling priority of thread "lower_phy_tx#0" not changed. Cause: Not enough privileges.
Warning: Scheduling priority of thread "lower_phy_rx#0" not changed. Cause: Not enough privileges.
Warning: Scheduling priority of thread "io_broker_epoll" not changed. Cause: Not enough privileges.
Warning: With the given prach_frequency_start=0, the PRACH opportunities overlap with the PUCCH resources/guardband in prbs=[0, 11). Some interference between PUCCH and PRACH should be expected
Available radio types: uhd.
Warning: Scheduling priority of UHD not changed. Cause: Not enough privileges.
[INFO] [UHD] linux; GNU C++ version 11.4.0; Boost_107400; UHD_4.9.0.0-0ubuntu1~jammy3
[INFO] [LOGGING] Fastpath logging disabled at runtime.
[DEBUG] [MPMD] Discovering MPM devices on port 49600
[DEBUG] [MPMD] Discovering MPM devices on port 49600
[DEBUG] [MPMD] Discovering MPM devices on port 49600
No device type given, found device with address 'addr=24607:1027,driver=lime,label=LimeSDR Mini [USB 3.0] 1D3AD5E0E2D1DB,media=USB 3.0,module=FT601,name=LimeSDR Mini,serial=1D3AD5E0E2D1DB,type=soapy'
Making USRP object with args 'soapy=0,type=soapy'
[INFO] [UHDSoapyDevice] Make connection: 'LimeSDR Mini [USB 3.0] 1D3AD5E0E2D1DB'
[INFO] [UHDSoapyDevice] Reference clock 40.00 MHz
[INFO] [UHDSoapyDevice] Device name: LimeSDR-Mini
[INFO] [UHDSoapyDevice] Reference: 40 MHz
[INFO] [UHDSoapyDevice] LMS7002M register cache: Disabled
Error: couldn't set sync source: Invalid time source external. Supported:
srsRAN ERROR: Unable to create radio session.`

Now I need to figure out this timing issue...

[robertfalkenberg]

Try to remove

ru_sdr:
  clock: external

from your config.

[maronows]

Would love to do that but as you can see above, I don't have it set at all in gnb config ;)

[robertfalkenberg]

Ah I overlooked it due to the formatting.

Can you try with this:

ru_sdr:
  clock: internal
  sync: internal

[maronows]

Tried all options: external (don't have an external clock so doesn't have much sense for me ;) ), internal and default. Same error with all of them.