A couple of years ago,

Tim_Lukasik · June 20, 2018, 4:41pm

A couple of years ago, @marmil responded to someone who was looking for a marquee type animation for a project. You included this sketch:

github.com

marmilicious/FastLED_examples/blob/master/marquee_v3.ino

//***************************************************************
// Marquee fun (v3)
//  Pixel position down the strip comes from this formula:
//      pos = spacing * (i-1) + spacing
//  i starts at 0 and is incremented by +1 up to NUM_LEDS/spacing.
//
// Marc Miller, May 2016
// Updated June 2018 - reordered some stuff and small bug fix.
//***************************************************************

#include "FastLED.h"

#define LED_TYPE LPD8806
#define NUM_LEDS 32
#define COLOR_ORDER GRB
//#define LED_TYPE APA102
//#define NUM_LEDS 39
//#define COLOR_ORDER BGR

#define DATA_PIN 11

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Which works great. I’m trying to incorporate it into the Demo Reel format and I keep having problems. I basically made a function out of the lines that were part of the main loop of the original code. But I think the problem is caused by the Every_n_seconds commands being nested in the function which is being called over and over again. Heres the code as I have it now:

Thanks for the help!

marmil · June 20, 2018, 7:07pm

@Tim_Lukasik I think it’s the fading tail part of the code that’s breaking it. Something with line 92 I’m guessing, because if you set fading tail to True then things works. I’ll try to look at it more later.

It’s ok to use EVERY_N in a function. For example, here’s a version of DemoReel with several functions that use EVERY_N.

github.com

marmilicious/FastLED_examples/blob/master/DemoReel100_ChristmasSparkles.ino

//***************************************************************
//  Random sparkle patterns with Christmas-ish colors.
//    Patterns:  christmasSparkles, christmasSparklesRB, christmasSparklesBP
//
//  This can be added to Mark Kriegsman's DemoReel100 as new patterns to run.
//  Copy lines 25 and 26 as well as the patterns below to your program.
//
//  Marc Miller, Dec 2016
//***************************************************************

#include "FastLED.h"
FASTLED_USING_NAMESPACE

#define DATA_PIN    11
#define CLK_PIN     13

#define LED_TYPE    LPD8806
#define COLOR_ORDER GRB
#define NUM_LEDS    32

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marmil · June 20, 2018, 9:46pm

@Tim_Lukasik Give this a try.
https://pastebin.com/kEBmddbk

Tim_Lukasik · June 21, 2018, 4:00am

Thanks @marmil , from your first post I did go back and look at my code and found one variable wrong but also realized that the problem was caused by the function writing the colored dots at a specific interval but the part which blacked them out ran every time so I was getting that flickering effect.

I copy/paste your code directly to a new sketch, adjusted the pin, led type and number of leds, uploaded it and nothing happens. I’m currently using a Trinket Pro 5v. I change over to my Circuit Playground, update pin, leds, etc and works beautifully.

Run a test sketch on the Trinket, works beautifully.

So there’s something in this new code that the trinket doesn’t like? I’ve never run into this before.

marmil · June 21, 2018, 4:48am

Isn’t there more then one version of the Trinket? Which one do you have?
*EDIT: @Tim_Lukasik Sorry I didn’t read carefully. See you’re using the Trinket Pro. What pin are you using for the leds Data?

Tim_Lukasik · June 21, 2018, 3:14pm

@marmil I’m using Pin 5

Tim_Lukasik · June 21, 2018, 11:42pm

@marmil I’m using Pin 5 on the Trinket Pro