InstallingGRFromSource on Raspberry Pi

Note that there is a pre-built 32-bit SDR flavored Raspberry Pi OS distro, PiSDR that includes GNU Radio and other SDR utilities. Alternatively, you can install from source using the steps in the remainder of this page.

These instructions have been tested with the Raspberry Pi OS (previously called Raspbian) (32-bit) with desktop and recommended software 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.

sudo fallocate -l 2G /swapfile sudo chmod 600 /swapfile sudo mkswap /swapfile sudo swapon /swapfile To make the swap file permanent, add this line to /etc/fstab /swapfile none  swap  sw  0  0

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.

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 build-essential liborc-0.4-0 liborc-0.4-dev \ python3-gi-cairo

You might, or might not, need:

sudo apt install python3-docutils python3-pip pip install pygccxml

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 FIRST must clone and install UHD.

For this example, we will start in the home directory to parallel the steps for installing GNU Radio from source.

cd ~/

Clone the code into your home directory:

git clone https://github.com/EttusResearch/uhd.git cd ~/uhd

Note: In the following command, change  to some other branch or tag if you want to build a different version. git checkout v4.4.0.0

Note: Unlike most GNU Radio build processes, UHD builds under the  directory. cd host mkdir build cd build

Note: In the following command, we will use  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.

cmake -DNEON_SIMD_ENABLE=OFF -DCMAKE_INSTALL_PREFIX=/usr/local ../

Note: In the following command, if your computer's CPU has multiple cores, you can use the argument  to speed compilation; e.g.,   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.

make -j3 make test sudo make install

If you're running Linux, then always do the following command after installing any library:

sudo ldconfig

You can now download the UHD FPGA Images for this installation. sudo uhd_images_downloader

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. cd ~/uhd/host/utils sudo cp uhd-usrp.rules /etc/udev/rules.d/ sudo udevadm control --reload-rules sudo udevadm trigger

The installation of UHD is now complete. At this point, connect the USRP to the host computer and run: uhd_usrp_probe

Install GNU Radio
'''The next steps will take two or more hours. Be patient. The terminal does show the progress.'''

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