From db785f4f3e56336e8d6a12e211433dd7ba410505 Mon Sep 17 00:00:00 2001 From: Nick Van Doorn Date: Sat, 24 Nov 2018 14:58:19 -0800 Subject: Example thread flag in readme --- readme.md | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/readme.md b/readme.md index fdd3703..a1913aa 100644 --- a/readme.md +++ b/readme.md @@ -6,12 +6,15 @@ This application is designed to operate on a [MongOH Red](https://mangoh.io/mang When cloning use ``git clone https://github.com/brnkl/motion-service.git``. - ## Building Compile the project using wp85: ``make wp85`` +### Flags + +- `-DMOTION_MONITOR_USE_THREAD` enables thread based mode (polling). By default, an interrupt pin is used to detect motion. This results in lower traffic on the bus (i2c or SPI), but also requires special drivers for the BMI160. + ## 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. -- cgit v1.2.3