Freescale 3-axis accelerometer MMA7455 library for Arduino

A serious MMA7455 arduino library

Features

• Support both I2C and SPI protocol
• Get the 8-bit and 10-bit values of each axis
• Get the value in 'g' for each axis
• Support the standard measurement mode
• Support the level mode (with interrupts)
• Support the pulse mode (with interrupts)
• Support the double pulse mode (with interrupts)

Limitations

• The library relies on the standard Arduino libraries: the Wire library (for I2C) and the SPI library.
• Particle SparkCore has some performance issues with this library (and I don't know why), however the Particle Photon works wonderfully.
• The SPI feature works only with a 3.3v logic level, this is an hardware limitation of the MMA7455.

Hardware tested

• Arduino Uno (I2C only)
• Arduino Duemilanove (I2C only)
• Arduino Pro Mini 3.3v (I2C and SPI)
• Particle Photon (I2C and SPI)
• Note: If your board is not mentioned in the list, it doesn't mean it won't work with yours, it just means I didn't try it because I don't have every Arduino board on planet Earth.

Examples

• MMA7455_Demo: Simply display the 10-bit raw value and the 'g' value for each axis in measurement mode.
• MMA7455_AutoCalibration: Let it run to determine the offset values of your accelerometer.
• MMA7455_InterruptLevel: Illustrate the level mode and the interrupts.
• MMA7455_InterruptPulse: Illustrate the pulse mode and the interrupts.
• MMA7455_InterruptDoublePulse: Illustrate the double pulse mode and the interrupts.

How-to use it?

1. Download the library
2. Extract and rename the folder to "MMA_7455".
3. Place the renamed folder in arduino/libraries/
4. Open the arduino IDE
5. Open MMA7455_Demo sample code
6. Upload it in your arduino board
7. Open a serial console set at 9600 baud
8. See the live value of the 3 axis

License GPLv2

  Freescale 3-Axis Accelerometer MMA7455 Library designed for Arduino
  Copyright (C) 2015  Alexandre Boni
  
  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.
  
  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.
  
  You should have received a copy of the GNU General Public License along
  with this program; if not, write to the Free Software Foundation, Inc.,
  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.