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Aaron Rossetto 80aabd0d87 N320: Revert PLL lock time reduction 
This commit reverts the changes made in commit 81a9cc1f8 to reduce the
time for the LMK PLL to report lock status. The decision to revert the
change comes after an investigation found that reducing the overall time
to detect lock correlates with an increase in an error reported by the
TDC ('[ERROR] TDC measurements show a wide range of values!  Check your
clock rates for incompatibilities. ...  Uncaught exception in method
set_clock_source: TDC measurement out of expected range!').  Despite the
LMK PLL reporting lock status, our investigation revealed that it takes
additional time for the PLL to align the daughterboards' clocks closely
enough to pass the TDC measurement's range limit (i.e., no samples
exceeding the measurement mean +/- 500 ps). Reverting the change
increases the amount of time between achieving lock status and taking
the TDC measurements, thus greatly reducing the likelihood of the
reported error.
2022-07-13 13:52:22 -05:00
.ci ci: Device wait to redlock scope for Vivado close 2021-11-08 15:48:20 -06:00
.github ci: Add CLA assistant 2021-07-08 12:45:32 +02:00
firmware firmware: b2xx: Update to newer Cypress FX3 SDK 2020-08-25 07:28:22 -05:00
fpga REVERT images: zbx lattice cpld image manifest 2022-07-13 09:31:26 -05:00
host uhd: Prepare branch for 4.1.0.5 release 2021-12-14 12:37:20 -06:00
images REVERT images: zbx lattice cpld image manifest 2022-07-13 09:31:26 -05:00
mpm N320: Revert PLL lock time reduction 2022-07-13 13:52:22 -05:00
tools tools: Fix rfnoc dissector build 2021-11-30 13:35:48 -06:00
.clang-format clang-format: Break after templates 2019-03-21 09:50:09 -07:00
.clang-tidy Add clang-tidy file 2021-03-04 08:07:26 -06:00
.gitattributes uhd: Add support for the USRP X410 2021-06-10 12:01:53 -05:00
.gitignore uhd: gitignore .DS_Store for our macOS friends 2021-03-12 13:55:25 -06:00
.gitmodules Merge FPGA repository back into UHD repository 2020-01-28 09:35:36 -08:00
CHANGELOG uhd: Prepare branch for 4.1.0.5 release 2021-12-14 12:37:20 -06:00
CODING.md Merge FPGA repository back into UHD repository 2020-01-28 09:35:36 -08:00
CONTRIBUTING.md Merge FPGA repository back into UHD repository 2020-01-28 09:35:36 -08:00
LICENSE.md Merge FPGA repository back into UHD repository 2020-01-28 09:35:36 -08:00
README.md README.md: Fix REDHAWK link 2020-08-13 15:02:20 -05:00

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:

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.