Overview

u-blox GPS receivers
use a UBX binary protocol to transmit GPS data to a host computer using
asynchronous serial ports. This project provides a definition all
the messages as well as wrapping transport framing used by
u-blox 5/6/7/8/9 devices.

The protocol is defined in multiple schema
files using CommsDSL.
The commsds2comms code generator from commsdsl
project is used to generate C++11 code of the protocol implementation.

The code generators from the commsdsl
repository generate full CMake projects.
Some of these generated projects are hosted as separate
repositories that can be viewed and used independently.

• cc.ublox.generated - Protocol
  definition
• cc.ublox_protocol.cc_tools_plugin -
  Protocol plugin for the CommsChampion Tools.

Examples

The examples directory contains following example applications:

• simple_pos - simple application that communicates to u-blox receiver over
  USB serial link and polls for NAV-POSLLH messages. When latter is received,
  the position is printed to standard output.

License

Please read License
section from commsdsl project.

How to Build

This project uses CMake as its build system. Please open main
CMakeLists.txt file and review available options as well as
mentioned available parameters, which can be used in addition to standard
ones provided by CMake itself, to modify the default build.

Note that UBX protocol is huge and it may be impractical to
support all the messages, especially if some extra applications for testing
and/or bindings to other languages is needed. It is highly recommended
to provide a list of required messages using UBLOX_SCHEMA_FILES_LIST_FILE
cmake parameter.

This project also has external dependencies, it requires an access to
the COMMS Library and
code generators from commsdsl projects.
These dependencies are expected to be built independenty and access to them provided
via standard CMAKE_PREFIX_PATH and/or CMAKE_PROGRAM_PATH (for the binaries of
the code generators). There are also scripts (
script/prepare_externals.sh for Linux and
script/prepare_externals.bat for Windows)
which can help in preparation of these dependencies. They are also used
in configuration of the github actions.

The project's cmake configuration options allow building
bindings to other high level programming languages using swig
and emscripten, see relevant commsdsl's
documentation pages for details.

The example applications use Boost
to parse their command line parameters as well as manage their asynchronous I/O.
In case Boost libraries are not installed in expected default location
(mostly happens on Windows systems), use variables described in
CMake documentation
to help CMake find required libraries and headers.
It is recommended to use -DBoost_USE_STATIC_LIBS=ON parameter to force
linkage with static Boost libraries.

Linux Build

$> cd /source/of/this/project
$> mkdir build && cd build
$> BUILD_DIR=$PWD CC=gcc CXX=g++ COMMON_INSTALL_DIR=$PWD/install COMMON_BUILD_TYPE=Release ../script/prepare_externals.sh
$> cmake .. -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=$PWD/install -DCMAKE_PREFIX_PATH=$PWD/install
$> make install

Windows Build

$> cd C:\source\of\this\project
$> mkdir build && cd build
$> set BUILD_DIR=%cd%
$> set GENERATOR="NMake Makefiles"
$> set QTDIR=C:\Qt\5.15.2
$> set COMMON_INSTALL_DIR=%cd%/install
$> ..\script\prepare_externals.bat
$> cmake .. -G "NMake Makefiles" -DCMAKE_BUILD_TYPE=Release ^
    -DCMAKE_INSTALL_PREFIX=%cd%/install -DCMAKE_PREFIX_PATH=%cd%\install ^
    -DBOOST_ROOT="C:\Libraries\boost_1_65_1" -DBoost_USE_STATIC_LIBS=ON
$> nmake install

Supported Compilers

Please read Supported Compilers
info from commsdsl project.

How to Build and Use Generated Code

Please read the
Generated CMake Project Walkthrough
documentation page for details on the generated project internals.

The release
artifacts contain doxygen generated documentation of the protocol definition.

Contact Information

For bug reports, feature requests, or any other question you may open an issue
here in github or e-mail me directly to: arobenko@gmail.com. I usually
respond within 24 hours.