Sony Spresense IMU Example Code

#1

  • Example Arduino code running an Edge Impulse Model that reads

    • a Rohm KX126 or Rohm KX224 IMU is here.
    • the Spresense camera is here.
    • the Spresense microphone is here.

  • Can a machine learning Model that reads IMU data and deployed from the Edge Impulse Studio run on a SubCore?

    • The answer is yes!
    • Sidenote: A ML Model that reads the Spresense camera or microphones cannot run on a SubCore.

  • Can a IMU based Model run on the MainCore and a different IMU based Model run on a SubCore?

    • The answer is probably not!
    • My trail code and deadbeef notes are here.

  • If you want to use the KX224 IMU sensor with the Sony Spresese Edge Impulse Firmware see HOWTO code here.

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#2

Code now works and will make inferences using different cores with the same Model that reads different input sensors depending on the core the Model is runnng on.

Mods made:

  • Changed KX224_I2C library to use Wire1. The KX224 was wired to the other I2C bus on the Spresense.
  • The "loop()" now does a mutex so only the MainCore or the SubCore is running an inference.
  • Since the different cores are now using seperate I2C busses, I thought they could collect data in parallel and outside of the mutex. However, the MainCore would not reliably sample data and eventually never comeback from ei_inertial_read_data().
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#3

Awesome work here @MMarcial - thanks for the contributions!