Tessel LED backpack-ht16k33 API

Driver for the HT16K33 backpack from Adafruit

The documentation for the chip can be found here.

If you run into any issues, please create a ticket.

Setup

The backpack has four connections: +, -, D, and C. They need to be hooked to 3.3V, GND, SDA, and SCL, respectively, of a module port.  (Read more about the I2C communication protocol here.)

The module supports both 3.3V and 5V. It works better at 5V, but will need an external power source. (Read more about power on Tessel here.)

Installation

npm install backpack-ht16k33

Example

var tessel = require("tessel");
var backpack = require('backpack-ht16k33').use(tessel.port['A']);

backpack.on('ready', function() {
  backpack.clear();
  var bitmap = [
    [0,0,1,1,1,1,0,0],
    [0,1,0,0,0,0,1,0],
    [1,0,1,0,0,1,0,1],
    [1,0,0,0,0,0,0,1],
    [1,0,1,0,0,1,0,1],
    [1,0,0,1,1,0,0,1],
    [0,1,0,0,0,0,1,0],
    [0,0,1,1,1,1,0,0],
  ];
  backpack.writeBitmap(bitmap);
});

Methods

# backpack.clear ( callback(err) ) turns off every light on the led

# backpack.writeBitmap ( bitmap, callback(err) ) the bitmap is and array of bits. Each 1 will be turned on and the 0 will be turned off.

# backpack.animate ( frames, interval ) renders each frame in order with a separation in ms equal to the interval

Events

# backpack.on( 'error', callback(err) ) Emitted upon error.

# backpack.on( 'ready', callback() ) Emitted upon first successful communication between the Tessel and the module.

Further Examples

var tessel = require("tessel");
var backpack = require('../').use(tessel.port['A']);

backpack.on('ready', function() {
  backpack.clear();
  var smile = [
    [0,0,1,1,1,1,0,0],
    [0,1,0,0,0,0,1,0],
    [1,0,1,0,0,1,0,1],
    [1,0,0,0,0,0,0,1],
    [1,0,1,0,0,1,0,1],
    [1,0,0,1,1,0,0,1],
    [0,1,0,0,0,0,1,0],
    [0,0,1,1,1,1,0,0],
  ];

  var straight = [
    [0,0,1,1,1,1,0,0],
    [0,1,0,0,0,0,1,0],
    [1,0,1,0,0,1,0,1],
    [1,0,0,0,0,0,0,1],
    [1,0,0,0,0,0,0,1],
    [1,0,1,1,1,1,0,1],
    [0,1,0,0,0,0,1,0],
    [0,0,1,1,1,1,0,0],
  ];

  var frown = [
    [0,0,1,1,1,1,0,0],
    [0,1,0,0,0,0,1,0],
    [1,0,1,0,0,1,0,1],
    [1,0,0,0,0,0,0,1],
    [1,0,0,1,1,0,0,1],
    [1,0,1,0,0,1,0,1],
    [0,1,0,0,0,0,1,0],
    [0,0,1,1,1,1,0,0],
  ];

  var frames = [smile, straight, frown];
  backpack.animate(frames, 500);
});

Licensing

MIT

Copyright

Binary Noggin, LLC - 2015