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laforge, 06/13/2018 02:11 PM
remove user-contributed tutorial, move it to separate page
- Table of contents
- LimeSDR
- LimeSDR Mini
- LimeSDR PCIe
- OsmoTRX on LimeSDR
LimeSDR¶
The LimeSDR is a low-cost SDR board featuring the Lime Microsystems LMS7002 RF chip.
Key characteristics include:- RF Transceiver: Lime Microsystems LMS7002M MIMO FPRF
- FPGA: Altera Cyclone IV EP4CE40F23 – also compatible with EP4CE30F23
- Memory: 256 MBytes DDR2 SDRAM
- USB 3.0 controller: Cypress USB 3.0 CYUSB3014-BZXC
- Oscillator: Rakon RPT7050A @ 30.72MHz
- Continuous frequency range: 100 kHz – 3.8 GHz
- Bandwidth: 61.44 MHz
- RF connection: 10 U.FL connectors (6 RX, 4 TX)
- Power Output (CW): up to 10 dBm
- Multiplexing: 2×2 MIMO
- Power: micro USB connector or optional external power supply
- Status indicators: programmable LEDs
- Dimensions: 100 mm x 60 mm
RF Output Power¶
TBD
Clock¶
The on-board clock is a 250ppb VCTCXO. GSM strictly requires 30ppb, but 250ppb should be sufficient for laboratory use.
Clock Calibration¶
TBD
Using external clock reference¶
TBD
LimeSDR Mini¶
The LimeSDR Mini is a smaller, less expensive version of the original LimeSDR.
Key characteristics include:- RF Transceiver: Lime Microsystems LMS7002M FPRF
- FPGA: Altera MAX 10 (10M16SAU169C8G)
- EEPROM memory: 2 x 128 KB for RF transciever MCU firmware and data
- Flash memory: 1 x 4 MB flash memory for data
- USB 3.0 controller: FTDI FT601
- Rakon 30.72 MHz VCTCXO
- Continuous frequency range: 10 MHz – 3.5 GHz
- Bandwidth: 30.72 MHz
- RF Connection: 2 x SMA connectors (each can be switched between high and low frequency bands) + 1x U.FL REF CLK
- Power Output (CW): up to 10 dBm
- Dimensions: 69 mm x 31.4 mm
RF Output Power¶
TBD
LimeSDR PCIe¶
TBD
OsmoTRX on LimeSDR¶
In terms of OsmoTRX support, you will find a relatively complex driver stack consisting of:- LimeSuite containing the actual drivers and utilities for LimeSDR (version 17.09 or later required)
- for LimeSDR-mini, you will need 17.10 or later
- SoapySDR as middleware that wraps LimeSuite
- SoapyUHD as plug-in exposing SoapySDR devices to UHD
- UHD as the driver interface below OsmoTRX
You will need to observe the following dependencies when building the above:
- SoapyUHD depends on SoapySDR
- LimeSuite depends on SoapySDR.
Verifying the driver stack¶
You can ensure that LimeSuite recognizes your device using the LimeUtil part of LimeSuite:
$ LimeUtil --find * [LimeSDR-USB, media=USB 3.0, module=STREAM, addr=1d50:6108, serial=0009060B00xxyyzz]
You can ensure that SoapySDR and LimeSuite work together as expected using the SoapySDRUtil part of SoapySDR:
$ ./SoapySDRUtil --find ###################################################### ## Soapy SDR -- the SDR abstraction library ###################################################### linux; GNU C++ version 6.3.0 20170221; Boost_106200; UHD_003.009.005-0-unknown Found device 0 addr = 1d50:6108 driver = lime label = LimeSDR-USB [USB 3.0] 9060B00462B1C media = USB 3.0 module = STREAM name = LimeSDR-USB serial = 0009060B00xxyyzz
Troubleshooting¶
Firmware upgrade¶
If you see UHD warnings regarding version mismatch, follow the steps as explained in the same output, basically run LimeUtil --update
. It will download the latest firmware into $HOME/.local/share/LimeSuite/images/
and flash the device.
-- Make connection: 'LimeSDR-USB [USB 2.0] 9060B00471827' UHD Warning: Firmware version mismatch! Expected firmware version 4, but found version 3 Follow the FW and FPGA upgrade instructions: http://wiki.myriadrf.org/Lime_Suite#Flashing_images Or run update on the command line: LimeUtil --update UHD Warning: Gateware version mismatch! Expected gateware version 2, revision 12 But found version 2, revision 8 Follow the FW and FPGA upgrade instructions: http://wiki.myriadrf.org/Lime_Suite#Flashing_images Or run update on the command line: LimeUtil --update -- Reference clock 30.720 MHz -- Device name: LimeSDR-USB -- Reference: 30.72 MHz -- Init LMS7002M(0) -- Ver=7, Rev=1, Mask=1 -- LMS7002M calibration values caching Disable
Channel setting failed¶
If at osmo-trx startup time UHD fails with an alert similar to the one below, it means you forgot to specify the correct samples-per-symbol for both Tx and Rx, which in the case of LimeSDR is 4.
ALERT 140046942525312 15:50:41.0 /home/pespin/dev/sysmocom/git/osmo-trx/Transceiver52M/UHDDevice.cpp:642:open: Channel setting failed - map::at ALERT 140046942525312 15:50:41.0 /home/pespin/dev/sysmocom/git/osmo-trx/Transceiver52M/UHDDevice.cpp:642:open: Channel setting failed - map::at ALERT 140046942525312 15:50:41.0 /home/pespin/dev/sysmocom/git/osmo-trx/Transceiver52M/osmo-trx.cpp:489:main: Failed to create radio device ALERT 140046942525312 15:50:41.0 /home/pespin/dev/sysmocom/git/osmo-trx/Transceiver52M/osmo-trx.cpp:489:main: Failed to create radio device Shutting down transceiver...You need to pass the correct parameters to osmo-trx:
- -s Tx samples-per-symbol (1 or 4)
- -b Rx samples-per-symbol (1 or 4)
osmo-trx -s 4 -b 4
Updated by laforge almost 6 years ago · 26 revisions