41956b07d6
There is an issue that mraa_pwm_write would fail, because mraa_pwm_read would fail and return 0. When the read fails, journalctl shows an error: Dec 28 18:01:38 Edison libmraa[365]: pwm: Error in reading period So now trying version, where the pwm object caches the period, that is updated whenever you do a read or write of the period. Side benefit is that the write should be sped up. Signed-off-by: Kurt Eckhardt <kurte@rockisland.com> Signed-off-by: Thomas Ingleby <thomas.c.ingleby@intel.com>
libmraa - Low Level Skeleton Library for Communication on GNU/Linux platforms
Libmraa is a C/C++ library with bindings to javascript & python to interface with the IO on Galileo, Edison & other platforms, with a structured and sane API where port names/numbering matches the board that you are on. Use of libmraa does not tie you to specific hardware with board detection done at runtime you can create portable code that will work across the supported platforms.
The intent is to make it easier for developers and sensor manufacturers to map their sensors & actuators on top of supported hardware and to allow control of low level communication protocol by high level languages & constructs.
Supported Boards
X86
ARM
Installing on your board
See the section below on compiling or use our repository to install on an eglibc based yocto poky image that supports opkg. Adding this repository is as simple as:
echo "src mraa-upm http://iotdk.intel.com/repos/1.1/intelgalactic" > /etc/opkg/mraa-upm.conf
opkg update
opkg install libmraa0
Compiling
See documentation on building
Examples
See the examples available for various languages
C/C++ API Documentation
The C/C++ documentation is available here
Python API Documentation
The Python documentation is available here
NodeJS API documentation
There is no explicit nodejs API documentation, see the examples. The API itself is very similar to the python one but with a js syntax. If you know of an autodoc tool for generating nodejs APIs from a native C++ nodejs extension please get in touch!