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Barry Duggan is a graduate of Georgia Tech in Electrical Engineering and is a career computer programmer specializing in real-time control, data communication systems, and email security. He has been an amateur radio operator since 1953, and now devotes most of his time to the GNU Radio project. He is a member of the GNU Radio General Assembly, the GRCon21 Organizing Committee, and is currently the Documentation Lead for GNURadio.
These instructions have been tested with the <q>Raspberry Pi OS (32-bit) with desktop and recommended software</q> on a Raspberry Pi 3B+. A 32GB microSD card is recommended.
 
 
 
== Set up a swap file ==
 
 
 
A swap file will improve the compile time greatly.
 
 
 
<pre>
 
sudo fallocate -l 2G /swapfile
 
sudo chmod 600 /swapfile
 
sudo mkswap /swapfile
 
sudo swapon /swapfile
 
</pre>
 
<p>To make the swap file permanent, add this line to /etc/fstab</p>
 
<pre>
 
/swapfile  none  swap  sw  0  0
 
</pre>
 
 
 
== Load prerequisites ==
 
 
 
You may have some of these prerequisites already, but it doesn't hurt to get them again and check for the latest versions.
 
 
 
<pre>
 
sudo apt update --allow-releaseinfo-change
 
sudo apt upgrade
 
sudo apt install git cmake g++ libboost-all-dev libgmp-dev swig python3-numpy \
 
python3-mako python3-sphinx python3-lxml doxygen libfftw3-dev \
 
libsdl1.2-dev libgsl-dev libqwt-qt5-dev libqt5opengl5-dev python3-pyqt5 \
 
liblog4cpp5-dev libzmq3-dev python3-yaml python3-click python3-click-plugins \
 
python3-zmq python3-scipy libpthread-stubs0-dev libusb-1.0-0 libusb-1.0-0-dev \
 
libudev-dev python3-setuptools python-docutils build-essential liborc-0.4-0 liborc-0.4-dev
 
</pre>
 
 
 
== Install UHD from source ==
 
 
 
If you want to use GNU Radio with a USRP, install the UHD package from source using the following instructions.
 
UHD sits at the same level as GNU Radio as an independent driver, which gr-uhd references.  So if you want gr-uhd enabled, you <b>FIRST</b> must clone and install UHD.
 
 
 
For this example, we will start in the home directory to parallel the steps in [[InstallingGR#To_install_system_wide]].
 
 
 
<pre>cd ~/</pre>
 
 
 
Clone the code into your home directory:
 
 
 
<pre>
 
git clone git://github.com/EttusResearch/uhd.git
 
cd ~/uhd
 
</pre>
 
 
 
<b>Note:</b> In the following command, change <code>v3.15.0.0</code> to some other branch or tag if you want to build a different version.
 
<pre>
 
git tag -l
 
git checkout v3.15.0.0
 
</pre>
 
 
 
<b>Note:</b> Unlike most build processes, UHD builds under the <code>host</code> directory.
 
<pre>
 
cd host
 
mkdir build
 
cd build
 
</pre>
 
 
 
<b>Note:</b> In the following command, we will use <code>-DCMAKE_INSTALL_PREFIX=/usr/local</code> to install UHD into the same prefix as GNU Radio. When compiling for ARM platforms, the assumption is made that NEON extensions are available if the arm_neon.h header is found. However, for platforms such as Raspberry Pi, one must specify -DNEON_SIMD_ENABLE=OFF in the following command.
 
 
 
<pre>
 
cmake -DNEON_SIMD_ENABLE=OFF -DCMAKE_INSTALL_PREFIX=/usr/local ../
 
</pre>
 
 
 
<b>Note:</b> In the following command, if your computer's CPU has multiple cores, you can use the argument <code>-j#</code> to speed compilation; <br> e.g., <code>make -j3</code> will use 3 threads in the build. Specify at least one less than the number of CPU cores so the system does not appear to 'freeze' during the build. If not specified, then a single thread is used for the build; this is not necessarily a bad thing, but it will take roughly 2 times as long to build as using 2 threads, and roughly 3 times as long to build as using 3 threads.<br>
 
 
 
<pre>
 
make -j3
 
make test
 
sudo make install
 
</pre>
 
 
 
If you're running Linux, then always do the following command after installing any library:
 
 
 
<pre>sudo ldconfig</pre>
 
 
 
You can now download the UHD FPGA Images for this installation.
 
<pre>
 
sudo uhd_images_downloader
 
</pre>
 
 
 
On Linux, udev handles USB plug and unplug events. The following commands install a udev rule so that non-root users may access the device.
 
<pre>
 
cd ~/uhd/host/utils
 
sudo cp uhd-usrp.rules /etc/udev/rules.d/
 
sudo udevadm control --reload-rules
 
sudo udevadm trigger
 
</pre>
 
 
 
The installation of UHD is now complete. At this point, connect the USRP to the host computer and run:
 
<pre>
 
uhd_usrp_probe
 
</pre>
 
 
 
== Install GNU Radio ==
 
 
 
<p><b>The next steps will take two or more hours. Be patient. The terminal does show the progress.</b></p>
 
 
 
Click [[InstallingGR#From_Source]] to go to the install instructions.
 

Latest revision as of 19:10, 22 July 2021

Barry Duggan is a graduate of Georgia Tech in Electrical Engineering and is a career computer programmer specializing in real-time control, data communication systems, and email security. He has been an amateur radio operator since 1953, and now devotes most of his time to the GNU Radio project. He is a member of the GNU Radio General Assembly, the GRCon21 Organizing Committee, and is currently the Documentation Lead for GNURadio.