PMW3389

Interfacing PixArt PMW3389 with Arduino boards

Parts info

• PMW3389 Module: https://www.tindie.com/products/jkicklighter/pmw3389-motion-sensor/ by JACK Enterprises
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• Base source code: https://github.com/mrjohnk/PMW3389DM by mrjohnk
• Teensy LC (https://www.pjrc.com/store/teensy.html) with Teensyduino (https://www.pjrc.com/teensy/teensyduino.html)
  • Arduino Leonardo: https://www.arduino.cc/en/Main/Arduino_BoardLeonardo

Pin connection

• MI = MISO
• MO = MOSI
• SS = Slave Select / Chip Select
• SC = SPI Clock
• MT = Motion (active low interrupt line)
• RS = Reset
• GD = Ground
• VI = Voltage in up to +5.5V

[Module] --- [Teensy]
      RS --- (NONE)
      GD --- GND
      MT --- (NONE)
      SS --- Pin 10
      SC --- SCK
      MO --- MOSI
      MI --- MISO
      VI --- 3.3V

// in Mouse example
[Button] --- [Teensy]
    Left --- Pin 3
   Right --- Pin 0
  Middle --- Pin 2
    Back --- Pin 1
   
* Connect the other pole of a button to GND

Sketch Descriptions

• PMW3389DM-Mouse/
  • Fully functional trackball (w. 1k polling rate) with four buttons (left, right, middle, back)
  • Default CPI and debounce time can be set (see #define sections in the source code)
  • Cycle through CPI with button combo (middle + right click)
  • Commands (newline (\n) should be placed at the end of each command)
    • Q: toggle surface quality report (can be seen thorugh Serial Monitor or Serial Plotter)
    • I: print device signature
    • C[number]: Set cpi level, example) C1600\n = set CPI to 1600.

How to use

• Build the circuit as described.
• (Arduino only) Copy the /library/AdvMouse/ to your Arduino library folder
• Load PMW3389DM-Mouse on Arduino IDE.
  • Modify dx, dy for your sensor orientation

Wishlist

• Deal with the scroll ring encoder

Construction

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