Hey I'm currently working on a gift for my girlfriend and I'm using a

Jarrod_Herbert · November 23, 2015, 3:50pm

Hey

I’m currently working on a gift for my girlfriend and I’m using a ring of Neopixels in it. I wanted to have a rainbow animation similar to both of the rainbow examples in NeoPixel. Can anyone instruct me on how to create a rainbow function, or call one that may already exist inside of FastLED?

I’m using a Spark Photon and the library included in the Web IDE.

I’ve attached a link to the full code I’m currently running
http://pastebin.com/GPTUs5Yw

Jason_Coon · November 23, 2015, 4:00pm

Looking forward to seeing pics/video of your creation!

FastLED has a built-in fill_rainbow function: Controlling leds · FastLED/FastLED Wiki · GitHub

Here’s a great demo/example:

github.com

FastLED/FastLED/blob/master/examples/DemoReel100/DemoReel100.ino#L70


}

#define ARRAY_SIZE(A) (sizeof(A) / sizeof((A)[0]))

void nextPattern()
{
  // add one to the current pattern number, and wrap around at the end
  gCurrentPatternNumber = (gCurrentPatternNumber + 1) % ARRAY_SIZE( gPatterns);
}

void rainbow() 
{
  // FastLED's built-in rainbow generator
  fill_rainbow( leds, NUM_LEDS, gHue, 7);
}

void rainbowWithGlitter() 
{
  // built-in FastLED rainbow, plus some random sparkly glitter
  rainbow();
  addGlitter(80);

Jarrod_Herbert · November 23, 2015, 4:11pm

Thanks Jason, I will look into it here in a little while. Seems like it should work just fine, but I’m currently getting a “could not compile” error with the Web IDE. Not a code error, but a server error I think.

Dushyant_Ahuja · November 23, 2015, 4:43pm

I don’t think fastled supports the spark photon as of now. The spark core is supported.

Jason_Coon · November 23, 2015, 4:47pm

It does, but not in the web IDE, you have to use Particle Dev: https://www.particle.io/dev and manually pull down this fork of the library: https://github.com/focalintent/FastLED-Sparkcore

More conversation here: https://github.com/FastLED/FastLED/issues/166#issuecomment-151327165

Jarrod_Herbert · November 23, 2015, 10:01pm

Within the WebIDE, I’ve compiled to my photon just fine without any special forking. Only certain things didn’t work, like flashing certain examples.