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Parallax P8X32A/Propeller, P2X8C4M64P/Propeller 2 driver object for the NXP MMA8452Q 3DoF Accelerometer

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mma8452q-spin


This is a P8X32A/Propeller, P2X8C4M64P/Propeller 2 driver object for the MMA8452Q 3DoF Accelerometer.

IMPORTANT: This software is meant to be used with the spin-standard-library (P8X32A) or p2-spin-standard-library (P2X8C4M64P). Please install the applicable library first before attempting to use this code, otherwise you will be missing several files required to build the project.

Salient Features

  • I2C connection at up to 400kHz
  • Supports default or alternate I2C address
  • Manually or automatically set bias offsets (on-chip)
  • Accelerometer built-in self-test
  • Read accelerometer data in ADC words or micro-g's
  • Set output data rate (in active and low-power operating modes)
  • Set power state
  • Set accelerometer full-scale
  • Set interrupt flags, INT1/2 pin active state
  • Set accelerometer data oversampling/power mode (in active and low-power operating modes)
  • Output data filtering: high-pass
  • Read flags: accelerometer data ready, data overrun, interrupts
  • Orientation detection
  • Click/Pulse/Tap detection
  • Free-fall detection
  • Inactivity detection/auto-sleep

Requirements

P1/SPIN1:

  • spin-standard-library
  • 1 extra core/cog for the PASM I2C engine (none if bytecode-based engine is used)
  • sensor.accel.common.spinh (provided by spin-standard-library)
  • sensor.accel.nxp.common.spinh (provided by spin-standard-library)

P2/SPIN2:

  • p2-spin-standard-library
  • sensor.accel.common.spin2h (provided by p2-spin-standard-library)
  • sensor.accel.nxp.common.spin2h (provided by p2-spin-standard-library)

Compiler Compatibility

Processor Language Compiler Backend Status
P1 SPIN1 FlexSpin (6.9.4) Bytecode OK
P1 SPIN1 FlexSpin (6.9.4) Native/PASM OK
P2 SPIN2 FlexSpin (6.9.4) NuCode Some runtime issues
P2 SPIN2 FlexSpin (6.9.4) Native/PASM2 OK

(other versions or toolchains not listed are not supported, and may or may not work)

Limitations

  • TBD

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Parallax P8X32A/Propeller, P2X8C4M64P/Propeller 2 driver object for the NXP MMA8452Q 3DoF Accelerometer

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