f077a17602
Starting from systemd v245, Duplicate Address Detection (DAD) is automatically
enabled for static IPv4 addresses if the IP address is a link local address.
DuplicateAddressDetection=none (or DuplicateAddressDetection=true for historical
reasons) deactivates this.
Important notes on compatibility:
- systemd v243.2 (Yocto release zeus) does not support DuplicateAddressDetection=none
and errors out without applying the IPv4 address -> use the historical
parameter DuplicateAddressDetection=true to remain backward compatibility
- systemd v250.5 (Yocto release kirkstone) ignores the DuplicateAddressDetection=none
(or DuplicateAddressDetection=true) parameter for link local addresses and enables
DAD unconditionally. This is fixed by commit a9efd16090baee492e9dd9ae832b5b548e7c6fcf
("network: do not enable IPv4 ACD for IPv4 link-local address if ACD is disabled explicitly")
which is not part of default Yocto systemd v250.5. In meta-ettus we have applied
the patch so that the DuplicateAddressDetection=none (or DuplicateAddressDetection=true)
parameter is honored for link local addresses
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|---|---|---|
| .ci | ||
| .github | ||
| firmware | ||
| fpga | ||
| host | ||
| images | ||
| mpm | ||
| tools | ||
| .clang-format | ||
| .clang-format-ignore | ||
| .clang-tidy | ||
| .gitattributes | ||
| .gitignore | ||
| .gitmodules | ||
| .pre-commit-config.yaml | ||
| .readthedocs.yaml | ||
| CHANGELOG | ||
| CODING.md | ||
| CONTRIBUTING.md | ||
| LICENSE.md | ||
| README.md | ||
USRP Hardware Driver (UHD™) Software
Welcome to the UHD™ software distribution! UHD is the free & open-source software driver and API for the Universal Software Radio Peripheral (USRP™) SDR platform, created and sold by Ettus Research.
UHD supports all Ettus Research USRP™ hardware, including all motherboards and daughterboards, and the combinations thereof.
Documentation
For technical documentation related to USRP™ hardware or UHD system design, check out the UHD and USRP Manual. That is where you can find Installation Instructions, help on how to build UHD from source on different platforms, development guidelines and reference documentation as well as device usage guidance.
Additionally, be sure to check out the Ettus Research FAQ, and the Knowledge Base for useful application notes and tutorials.
OS Support
UHD is primarily developed on Linux, but we also test and support the following operating systems.
- Linux (Fedora and Ubuntu)
- Mac OS X (Intel)
- Windows 10
Other operating systems will most likely work, too, but are not officially supported.
Applications
UHD can be used to build stand-alone applications with USRP™ hardware, or with third-party applications. Some common toolkits / frameworks are:
- GNU Radio
- NI LabVIEW
- MathWorks Matlab and Simulink
- REDHAWK
- OpenBTS GSM
- Osmocom GSM
- Amarisoft LTE
- Software Radio Systems srsRAN
- Eurecom OpenAirInterface
Directories
host/
The source code for the user-space driver.
mpm/
The source code for the module peripheral manager (MPM). This is code that is run on embedded devices.
firmware/
The source code for all microprocessors in USRP hardware.
fpga/
The source code for the UHD FPGA images.
images/
This contains the package builder for FPGA and firmware images. We provide other tools to download image packages, the scripts in here are mainly relevant for UHD maintainers and -developers.
tools/
Additional tools, mainly for debugging purposes. See the readme-file in that directory for more details on the individual tools.