FluMMA865x

Flummy's Arduino Library / Device driver for the MMA865x I2C accelerometers
http://koffein.org/E/FluMMA865x/

Features

This low-power device can trigger interrupts for four kinds of events

• Free fall/Motions events when the device is dropping or moved,
• Landscape/Portrait Front/Back events when the device is tilted on any of its 6 surfaces,
• Pulse/Tap/Double Tap events if it is tapped, and
• Transient events (similiar to Motion, but read the Data sheet)

This is an experimental attempt to fully encapsulate a device driver in C++ classes and unions:

The 8-bit-registers of the device can be accessed by their 8-bit byte value .v:
intSourceR.v = comms.readByte(FluMMA865xR::INT_SOURCE); // check if any interrupts are pending

or by their flag structure .f:
if(intSourceR.f.SRC_FF_MT) Serial << F("Free fall / motion event detected!\n");

This experiment is based on the work of

• Jim Lindblom at SparkFun Electronics, who would like a beer if you like his driver
• Kris Winer, wo added initialization, calibration and sleep mode stuff

Quick Start

1. Copy this library to you $HOME/sketchbook/libraries/ Folder.
   The resulting diretory tree should like this: sketchbook/libraries/FluMMA865x/ and the FluMMA865x*.cpp and *.h files should reside directly there.

2. Wire up an MMA865x accelerometer as described in HardwareSetup.txt

3. Quit and restart your Arduino IDE.

4. Using the IDE, navigate to File > Examples > FluMMA865x > FluMMA865xLibrarytest to load the demo sketch.

5. Compile and upload the sketch to your Arduino with the connected accelerometer.

6. Open a serial terminal and set it to 57600 baud. You should see a line identifying the running sketch as "...FluMMA865xLibrarytest".

7. Move the accelerometer with various speeds and observe the generated events and outputs.

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