node-rpi-rgb-led-matrix

Pilot your rgb led matrix with Nodejs on Raspberry Pi ! Nodejs binding of rpi-rgb-led-matrix library https://github.com/hzeller/rpi-rgb-led-matrix

Compatibility

NOTE: node-rpi-rgb-led-matrix should work across Node.js versions 0.8, 0.10, 0.12, 4 and 5 as it uses Native Abstractions. HOWEVER there is a problem with the Node.js version 0.10.29 packaged with Raspbian Jessie 2015-11-21 which breaks Native Abstractions. The easiest fix is to make a minor edit to your v8.js file; this and other solutions outlined on this Raspberry Pi Forum post.

$3

``
$ npm i node-rpi-rgb-led-matrix
`

$3

`
$ git clone --recursive https://github.com/zeitungen/node-rpi-rgb-led-matrix.git
$ cd node-rpi-rgb-led-matrix
$ npm i
`

Get some Fun

`js
var LedMatrix = require("node-rpi-rgb-led-matrix");

var matrix = new LedMatrix(16);
matrix.fill(255, 50, 100);
matrix.setPixel(0, 0, 0, 50, 255);
`

LedMatrix API

* Constructor: LedMatrix(rows, chainedDisplays, parallelDisplays)
default values are rows=32, chainedDisplays=1, parallelDisplay=1
* getWidth() return current led matrix width
* getHeight() return current led matrix height
* fill(red, green, blue) fill the led matrix with color specified
by red, green and blue. red, green and blue must be between 0 and 255
* setPixel(x, y, red, green, blue) set the color pixel at the position x,y
with color specified by red, green and blue. red, green and blue must be
between 0 and 255. x must be between 0 and getWidth(). y must be between
0and getGeight()
* clear() reset the led matrix display (shut down all leds)




Add specific defines for rpi-rgb-led-matrix

You can add specific defines for the rpi-rgb-led-matrix compilation.

You have to modify the binding.gyp file. In the rpi-rgb-led-matrix target add definesarray like this:
`json
...
{
"target_name": "rpi-rgb-led-matrix",
"type": "static_library",
"sources": ["external/matrix/lib/bdf-font.cc",
"external/matrix/lib/framebuffer.cc", "external/matrix/lib/gpio.cc",
"external/matrix/lib/graphics.cc", "external/matrix/lib/led-matrix.cc",
"external/matrix/lib/thread.cc"],
"libraries": ["-lrt", "-lm", "-lpthread"],

"defines": ["RGB_CLASSIC_PINOUT", "ONLY_SINGLE_CHAIN"],

"include_dirs": [ "external/matrix/include" ],
"direct_dependent_settings": {
"include_dirs": [ "external/matrix/include" ]
}
}
...
`

You have this defines possibility:
* INVERSE_RGB_DISPLAY_COLORS
* SHOW_REFRESH_RATE
* RGB_SLOWDOWN_GPIO=1 or RGB_SLOWDOWN_GPIO=2
* ADAFRUIT_RGBMATRIX_HAT
* ADAFRUIT_RGBMATRIX_HAT_PWM
* RGB_CLASSIC_PINOUT
* ONLY_SINGLE_CHAIN

Look at rpi-rgb-led-matrix Makefile
for more details of this defines.

Don't forget to recompile:
`
$ cd /path/to/node-rpi-rgb-led-matrix
$ node-gyp build
`
or run npm i`.