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authorNicholas Van Doorn <vandoorn.nick@gmail.com>2018-11-15 13:10:01 -0800
committerGitHub <noreply@github.com>2018-11-15 13:10:01 -0800
commit158fd00543e468675c83f9ad23a4ce47a716f94f (patch)
tree9f75c16e478a1518f7f84284678564823dc04e15 /readme.md
parent3da7cd6011d084fcb72b6f696319374ec59c2cd6 (diff)
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Merge pull request #8 from brnkl/documentation
Documentation
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+MangOH Motion Service
+======
+This application is designed to operate on a [MongOH Red](https://mangoh.io/mangoh-red-new) WP85 board. Using **general input output** this project uses pthreads to probe the onboard bmi160 chip intermittently in order to detect a significant motion on the board.
+
+## Prerequisites
+
+When cloning use ``git clone https://github.com/brnkl/motion-service.git``.
+
+
+## Building
+Compile the project using
+
+wp85: ``make wp85``
+
+## Setting Variables
+To change the sensitivity of impact detection you must edit the `motionMonitor/motionMonitor.c` file.
+The Accelerometer measures acceleration in 3 dimensions, X, Y, and Z. These dimensions of acceleration are recorded and the magnitude of their resulting vector is calculated using ``double impactMagnitude = sqrt(x * x + y * y + z * z);``. As visualized in the image below.
+
+![Magnitude](https://www.intmath.com/vectors/img/235-3D-vector.png)
+
+
+`#define DEFAULT_THRESHOLD_MS2 17` determines the magnitude of the resulting vector that will trigger the application to detect a sudden impact.
+
+If adjusting the value of `DEFAUTL_THRESHOLD_MS2` keep in mind that gravity implies a motionless magnitude of -9.8m/s^2.
+
+## Bindings
+App.adef
+```
+...
+bindings:
+{
+ myClientApp.myComponent.brnkl_motion -> motionService.brnkl_motion
+}
+...
+```
+Component.cdef
+```
+...
+requires:
+{
+ api:
+ {
+ brnkl_motion.api
+ }
+}
+...
+```
+
+## Example
+For getting the current acceleration
+```C
+struct Acceleration{
+ double x;
+ double y;
+ double z;
+};
+
+struct Acceleration v = value;
+
+le_result_t result = brnkl_motion_getCurrentAccleration(&v->x, &v->y, &v->z);
+```
+To get a list of all recent impacts.
+
+```
+ double xAcc[N_MAX_IMPACT_VALUES], yAcc[N_MAX_IMPACT_VALUES], zAcc[N_MAX_IMPACT_VALUES];
+
+ uint64_t timestamps[N_MAX_IMPACT_VALUES];
+
+ size_t xSize = N_MAX_IMPACT_VALUES, ySize = N_MAX_IMPACT_VALUES,
+ zSize = N_MAX_IMPACT_VALUES, timestampsSize = N_MAX_IMPACT_VALUES;
+
+ le_result_t r = brnkl_motion_getSuddenImpact(
+ xAcc, &xSize, yAcc, &ySize, zAcc, &zSize, timestamps, &timestampsSize);
+
+```
+