bladeGPS

Very crude experimental implementation of gps-sdr-sim for real-time signal generation. The code works with bladeRF and has been tested on Windows 10 and Ubuntu 20.04.

Usage: bladegps [options]
Options:
  -e <gps_nav>     RINEX navigation file for GPS ephemerides (required)
  -y <yuma_alm>    YUMA almanac file for GPS almanacs
  -u <user_motion> User motion file (dynamic mode)
  -g <nmea_gga>    NMEA GGA stream (dynamic mode)
  -l <location>    Lat,Lon,Hgt (static mode) e.g. 35.274,137.014,100
  -t <date,time>   Scenario start time YYYY/MM/DD,hh:mm:ss
  -T <date,time>   Overwrite TOC and TOE to scenario start time
  -d <duration>    Duration [sec] (max: 86400)
  -x <XB_number>   Enable XB board, e.g. '-x 200' for XB200
  -i               Interactive mode: North='w', South='s', East='d', West='a'
  -I               Disable ionospheric delay for spacecraft scenario
  -p               Disable path loss and hold power level constant

Build on Windows with Visual Studio

Follow the instructions at Nuand wiki page and build the bladeRF library from the source with Visual Studio 2013 Express for Windows Desktop. Assume you already downloaded pthread and libusb files and successfully built the bladeRF library for your Windows environment.

1. Start Visual Studio
2. Create an empty project for a console application
3. On the Solution Explorer at right, add the following files to the project:
   • bladegps.c and bladegps.h
   • gpssim.c and gpssim.h
   • getopt.c and getopt.h
4. Add the paths to the following folders in Configuration Properties -> C/C++ -> General -> Additional Include Directories:
   • pthreads-w32-2-9-1-release/Pre-built.2/include for pthread.h
   • bladeRF/include for libbladeRF.h
5. Add the paths to the following folders in Configuration Properties -> Linker -> General -> Additional Library Directories:
   • pthreads-w32-2-9-1-release/Pre-built.2/lib/x64 for pthreadVC2.lib
   • bladeRF/x64 for bladeRF.lib
6. Specify the name of the additional libraries in Configuration Properties -> Linker -> Input -> Additional Dependencies:
   • pthreadVC2.lib
   • bladeRF.lib
7. Select Release in the Solution Configurations drop-down list
8. Select X64 in the Sofution Platforms drop-down list
9. Run Build -> Build Solution

After a successful build, you can find the executable in the Release folder. You should put the copies of the following DLLs in the same folder to run the code:

• bladeRF.dll
• libusb-1.0.dll
• pthreadVC2.dll

Build on Linux (Ubuntu 20.04)

1. Retrieve the bladeRF source in a directory next to the current directory

    $ cd ..
    $ git clone [email protected]:Nuand/bladeRF.git
   

2. Build the bladeRF host library

    $ cd bladeRF/host
    $ mkdir build
    $ cd build
    $ cmake ..
    $ make
   

3. Build bladeGPS

    $ cd ../../../bladeGPS
    $ make
   

Build on Mac OS X (Catalina)

1. Install Xcode

2. Install Xcode Command Line Tools

    $ xcode-select --install
   

3. Install MacPorts

4. Create a symlink to port

    $ sudo ln -s /opt/local/bin/port /usr/local/bin/port
   

5. Install bladeRF

    $ sudo port install bladeRF +tecla
   

6. Install cmake

    $ sudo port install cmake
   

7. Retrieve the bladeRF source in a directory next to the current directory

    $ cd ..
    $ git clone [email protected]:Nuand/bladeRF.git
   

8. Build the bladeRF host library

    $ cd bladeRF/host
    $ mkdir build
    $ cd build
    $ cmake ..
    $ make && sudo make install
   

9. Install libomp and wget

    $ sudo port install libomp
    $ sudo port install wget
   

10. Compile for _MACOSX with OpenMP path and build bladeGPS

    $ cd ../../../bladeGPS
    $ make CFLAGS=”-I/opt/local/include/libomp _MACOSX”
    

Docker

A Dockerfile was created from Ubuntu 20.04 image that allows you to spin up a docker container in seconds.

1. Build docker image

    $ cd docker
    $ docker build -t bladegps .
   

2. Run bladegps command directly

    $ docker run -it --rm --privileged --device /dev/ttyUSB0 bladegps \
            /bin/bash -c "bladegps -e /opt/bladeGPS/brdc3300.18n -l 35.274,137.014,100 -d 86400"
   

3. Run bladegps command from docker cli

    $ docker run -it --rm --privileged --device /dev/ttyUSB0 bladegps /bin/bash
    bladegps@cb744220dea3:~$ bladegps -e /opt/bladeGPS/brdc3300.18n -l 35.274,137.014,100 -d 86400
   

Docker Compose

A docker-compose.yml example is provided, if you want to run bladegps as a service, restarting when it hits end of duration. Edit command and the device name before starting up service using docker-compose.

1. Run docker-compose service in background

    $ cd docker
    $ docker-compose up -d
   

2. Check docker-compose process status

    $ docker-compose ps
   

3. Connect to container running service, if desired

    $ docker-compose exec bladegps /bin/bash
   

4. Down the service when done

    $ docker-compose down
   

License

Copyright © 2015-2022 Takuji Ebinuma
Distributed under the MIT License.