In the following tutorials, we will use an out-of-tree module called howto. Tutorial 1: Creating an out-of-tree module Building a module, therefore, requires you to have cmake installed, and whatever build manager you prefer (most often this is 'make', but you could also be using Eclipse or MS Visual Studio). Specifically, have a look at the naming conventions! While this is written for the GNU Radio main tree, this should also be applied to all modules. Most important is definitely the block coding guide. Gr_modtool is now available in the GNU Radio source tree and is installed by default. The more your module is custom and has specific changes, the less useful gr_modtool will be, but it is probably the best place to start with any new module or block. Note that gr_modtool makes a lot of assumptions on what the code looks like. gr_modtool is a script which aims to help with all these things by automatically editing makefiles, using templates, and doing as much work as possible for the developer such that you can jump straight into the DSP coding. When developing a module, there's a lot of boring, monotonous work involved: boilerplate code, makefile editing, etc. Gr_modtool - The swiss army knife of module editing There are a couple of tools, scripts, and documents that are available as 3rd-party programs or as part of GNU Radio. in the GNU Radio companion) which behave just like the rest of GNU Radio however, the developers are different people. When installed, you have more blocks available (i.e. The example of such a module is the GNU Radio Digital Audio Broadcasting module, which extends GNU Radio with everything needed to get audio from DAB and DAB+. In fact, when you add your project to the PyBOMBS recipe repo, it will automatically update the CGRAN website. CGRAN projects are all available through our tool PyBOMBS. This allows you to maintain the code yourself and have additional functionality alongside the main code.Ī lot of OOT projects are hosted at CGRAN - the Comprehensive GNU Radio Archive Network. you wouldn't usually add stuff to the actual GNU Radio source tree unless you're planning to submit it to the devs for upstream integration). Typically, if you want to extend GNU Radio with your own functions and blocks, such a module is what you create (i.e. 8 Tutorial 3: Writing a signal processing block in PythonĪn out-of-tree module is a GNU Radio component that does not live within the GNU Radio source tree.7 Everything at one glance: Cheat sheet for editing modules/components:.5.11 Finalizing your work and installing.5.10 There's more: additional gr::block-methods.5.9 Making your blocks available in GRC.5.6 More C++ code (but better) - Subclasses for common patterns.5.5 Let's try that - running make test.5 Tutorial 2: Writing a block (square_ff) in C++.3 Tutorial 1: Creating an out-of-tree module.2.1 gr_modtool - The swiss army knife of module editing.
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