Mocking capability allows libmraa user to work with the library without any real hardware available. Enabling this requires library recompilation with architecture override (see Building section below). When mock is enabled, library simulates actual HW operations at the backend so that for the application it looks like a usual board. Being implemented at the backend, the functionality is available in all language bindings libmraa supports.
This feature is yet in the experimental mode and not all functionality is available. Right now we simulate a single generic board with only GPIO (without ISR) working. It also reports having an ADC with 10 (std)/12 (max) bit resolution, but the ADC functionality itself is not yet implemented.
We plan to develop it further and all contributions are more than welcome.
See the table below for pin layout and features
MRAA Number | Pin Name | Notes |
---|---|---|
0 | GPIO0 | GPIO pin, no muxing, no ISR |
Generally all the building steps are the same as listed in the main building guide, you just need to set some specific CMake options.
To build under Linux, follow standard instructions, just make sure to set
the -DBUILDARCH="MOCK"
CMake option.
Mocking capability allows us to build and use libmraa under Windows. That helps if you e.g. don't want to leave your customary Windows-based Python IDE, but want to develop libmraa-based programs.
Building Node.js bindings was not yet tested under Windows as MSYS2 does not have a ready-made package. Java was not tested either.
You'll need the following to build libmraa under Windows:
-
MSYS2 basic installation
-
Several additional packages, install them by running
pacman -S cmake base-devel gcc git
The procedure is conceptually the same as under Linux - you first need to run CMake with specific options to generate makefiles and then run make to build everything.
-
Run MSYS2 shell (not a MinGW one)
-
Clone the libmraa git repo (let's assume into
/home/test/mraa/mraa-src
dir) -
Create a build directory outside of the clone one (let's say
/home/test/mraa/mraa-build
) -
Run CMake, switching off unsupported options and enabling mock platform:
cmake ../mraa-src/ -DBUILDARCH="MOCK" -DBUILDSWIGNODE=OFF -DENABLEEXAMPLES=OFF
-
Make, install and test:
make clean && make install && make test
All tests should pass.
Note: To have autocompletion in Python IDE, just point it to MSYS2's Python
and make sure to specify any additional paths pointing to site-packages dir
with mraa module if IDE requires that ("Interpreter Paths" in PyCharm).
With the above settings the module will be installed into /usr/local/lib/python2.7/site-packages
and the libmraa itself - into /usr/local/bin
.