NeoPixel Code Generator

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21

Unfortunately I does not have any led strip at the moment to test it.

The best way to solve it would be to open an issue on GitHub, so I can see if there is an error in the script itself or in your settings.

For the maths, everything is converted to an integers, and sometimes floats are necessary to have the right result. This could be the case with your settings (so I can change the code, if it is wrong).

But what I see is that, you want fade from one color to another one in just 100ms. With a step of 75ms. This will always show it as blink. If you want fade, you need much more steps. Step should be set between 5 and 20ms (under 5ms, it could be hard and could not be possible on an Arduino mini - so you will have 6 or 10 at the end - if you have also other sensors).

With a step of 5ms and a fade time of 100, this means 20 substeps where you will see color changing. At the moment, you have 1.3333: you will never see a fade in this way.

Edit: 800kHz and LED type are not relevant. On 99% of the projects, 800kHz and NEO_GRB are correct.

22

I tried to use it to make a knight rider type light effect where it goes back & forth. Code below, it errors compiling on line 113 ( ind = 40 - (strip_0.effStep - j * 0.16) % 40;), error message is: "invalid operands of types 'double' and 'int' to binary 'operator%'"

I'm not a coder, just like tinkering. Can someone help me out? Thx

Code:
#include <Adafruit_NeoPixel.h>

class Strip
{
public:
uint8_t effect;
uint8_t effects;
uint16_t effStep;
unsigned long effStart;
Adafruit_NeoPixel strip;
Strip(uint16_t leds, uint8_t pin, uint8_t toteffects, uint16_t striptype) : strip(leds, pin, striptype) {
effect = -1;
effects = toteffects;
Reset();
}
void Reset(){
effStep = 0;
effect = (effect + 1) % effects;
effStart = millis();
}
};

struct Loop
{
uint8_t currentChild;
uint8_t childs;
bool timeBased;
uint16_t cycles;
uint16_t currentTime;
Loop(uint8_t totchilds, bool timebased, uint16_t tottime) {currentTime=0;currentChild=0;childs=totchilds;timeBased=timebased;cycles=tottime;}
};

Strip strip_0(165, 8, 165, NEO_GRB + NEO_KHZ800);
struct Loop strip0loop0(2, false, 1);

//[GLOBAL_VARIABLES]

void setup() {

//Your setup here:

strip_0.strip.begin();
}

void loop() {

//Your code here:

strips_loop();
}

void strips_loop() {
if(strip0_loop0() & 0x01)
strip_0.strip.show();
}

uint8_t strip0_loop0() {
uint8_t ret = 0x00;
switch(strip0loop0.currentChild) {
case 0:
ret = strip0_loop0_eff0();break;
case 1:
ret = strip0_loop0_eff1();break;
}
if(ret & 0x02) {
ret &= 0xfd;
if(strip0loop0.currentChild + 1 >= strip0loop0.childs) {
strip0loop0.currentChild = 0;
if(++strip0loop0.currentTime >= strip0loop0.cycles) {strip0loop0.currentTime = 0; ret |= 0x02;}
}
else {
strip0loop0.currentChild++;
}
};
return ret;
}

uint8_t strip0_loop0_eff0() {
// Strip ID: 0 - Effect: Rainbow - LEDS: 165
// Steps: 40 - Delay: 50
// Colors: 2 (255.0.0, 0.0.0)
// Options: rainbowlen=250, toLeft=true,
if(millis() - strip_0.effStart < 50 * (strip_0.effStep)) return 0x00;
float factor1, factor2;
uint16_t ind;
for(uint16_t j=0;j<165;j++) {
ind = strip_0.effStep + j * 0.16;
switch((int)((ind % 40) / 20)) {
case 0: factor1 = 1.0 - ((float)(ind % 40 - 0 * 20) / 20);
factor2 = (float)((int)(ind - 0) % 40) / 20;
strip_0.strip.setPixelColor(j, 255 * factor1 + 0 * factor2, 0 * factor1 + 0 * factor2, 0 * factor1 + 0 * factor2);
break;
case 1: factor1 = 1.0 - ((float)(ind % 40 - 1 * 20) / 20);
factor2 = (float)((int)(ind - 20) % 40) / 20;
strip_0.strip.setPixelColor(j, 0 * factor1 + 255 * factor2, 0 * factor1 + 0 * factor2, 0 * factor1 + 0 * factor2);
break;
}
}
if(strip_0.effStep >= 40) {strip_0.Reset(); return 0x03; }
else strip_0.effStep++;
return 0x01;
}

uint8_t strip0_loop0_eff1() {
// Strip ID: 0 - Effect: Rainbow - LEDS: 165
// Steps: 40 - Delay: 50
// Colors: 2 (255.0.0, 0.0.0)
// Options: rainbowlen=250, toLeft=false,
if(millis() - strip_0.effStart < 50 * (strip_0.effStep)) return 0x00;
float factor1, factor2;
uint16_t ind;
for(uint16_t j=0;j<165;j++) {
ind = 40 - (strip_0.effStep - j * 0.16) % 40;
switch((int)((ind % 40) / 20)) {
case 0: factor1 = 1.0 - ((float)(ind % 40 - 0 * 20) / 20);
factor2 = (float)((int)(ind - 0) % 40) / 20;
strip_0.strip.setPixelColor(j, 255 * factor1 + 0 * factor2, 0 * factor1 + 0 * factor2, 0 * factor1 + 0 * factor2);
break;
case 1: factor1 = 1.0 - ((float)(ind % 40 - 1 * 20) / 20);
factor2 = (float)((int)(ind - 20) % 40) / 20;
strip_0.strip.setPixelColor(j, 0 * factor1 + 255 * factor2, 0 * factor1 + 0 * factor2, 0 * factor1 + 0 * factor2);
break;
}
}
if(strip_0.effStep >= 40) {strip_0.Reset(); return 0x03; }
else strip_0.effStep++;
return 0x01;
}

knight_ryder_sam.ino (3.73 KB)

23

It is (another) generator bug.
Replace this:

ind = 40 - (strip_0.effStep - j * 0.16) % 40;

With this in your code:

ind = 40 - (uint16_t)(strip_0.effStep - j * 0.16) % 40;

But I will update the generator, so it will cast the value to an integer in future.

24

OK I'll try that. Thansk

25

I try to get this code to work...

Unfortunately, I can not get it to work.

#include <Adafruit_NeoPixel.h>

class Strip
{
public:
  uint8_t   effect;
  uint8_t   effects;
  uint16_t  effStep;
  unsigned long effStart;
  Adafruit_NeoPixel strip;
  Strip(uint16_t leds, uint8_t pin, uint8_t toteffects, uint16_t striptype) : strip(leds, pin, striptype) {
    effect = -1;
    effects = toteffects;
    Reset();
  }
  void Reset(){
    effStep = 0;
    effect = (effect + 1) % effects;
    effStart = millis();
  }
};

struct Loop
{
  uint8_t currentChild;
  uint8_t childs;
  bool timeBased;
  uint16_t cycles;
  uint16_t currentTime;
  Loop(uint8_t totchilds, bool timebased, uint16_t tottime) {currentTime=0;currentChild=0;childs=totchilds;timeBased=timebased;cycles=tottime;}
};

Strip strip_0(20, 3, 20, NEO_RGB + NEO_KHZ400);
struct Loop strip0loop0(1, false, 1);

//[GLOBAL_VARIABLES]

void setup() {

  //Your setup here:

  strip_0.strip.begin();
}

void loop() {

  //Your code here:

  strips_loop();
}

void strips_loop() {
  if(strip0_loop0() & 0x01)
    strip_0.strip.show();
}

uint8_t strip0_loop0() {
  uint8_t ret = 0x00;
  switch(strip0loop0.currentChild) {
    case 0: 
           ret = strip0_loop0_eff0();break;
  }
  if(ret & 0x02) {
    ret &= 0xfd;
    if(strip0loop0.currentChild + 1 >= strip0loop0.childs) {
      strip0loop0.currentChild = 0;
      if(++strip0loop0.currentTime >= strip0loop0.cycles) {strip0loop0.currentTime = 0; ret |= 0x02;}
    }
    else {
      strip0loop0.currentChild++;
    }
  };
  return ret;
}

uint8_t strip0_loop0_eff0() {
    // Strip ID: 0 - Effect: Move - LEDS: 20
    // Steps: 60 - Delay: 50
    // Colors: 0 ()
    // Options: toLeft=false, rotate=true, 
  if(millis() - strip_0.effStart < 50 * (strip_0.effStep)) return 0x00;
  uint32_t c = strip_0.strip.getPixelColor(19);
  for(uint16_t j=20-1;j>0;j--) 
    strip_0.strip.setPixelColor(j, strip_0.strip.getPixelColor(j-1)); 
  strip_0.strip.setPixelColor(0, c); 
  if(strip_0.effStep >= 60) {strip_0.Reset(); return 0x03; }
  else strip_0.effStep++;
  return 0x01;
}

are they errors in the code or from the generator?

26

St0ffel:
I try to get this code to work...

Unfortunately, I can not get it to work.

#include <Adafruit_NeoPixel.h>

class Strip
{
public:
  uint8_t  effect;
  uint8_t  effects;
  uint16_t  effStep;
  unsigned long effStart;
  Adafruit_NeoPixel strip;
  Strip(uint16_t leds, uint8_t pin, uint8_t toteffects, uint16_t striptype) : strip(leds, pin, striptype) {
    effect = -1;
    effects = toteffects;
    Reset();
  }
  void Reset(){
    effStep = 0;
    effect = (effect + 1) % effects;
    effStart = millis();
  }
};

struct Loop
{
  uint8_t currentChild;
  uint8_t childs;
  bool timeBased;
  uint16_t cycles;
  uint16_t currentTime;
  Loop(uint8_t totchilds, bool timebased, uint16_t tottime) {currentTime=0;currentChild=0;childs=totchilds;timeBased=timebased;cycles=tottime;}
};

Strip strip_0(20, 3, 20, NEO_RGB + NEO_KHZ400);
struct Loop strip0loop0(1, false, 1);

//[GLOBAL_VARIABLES]

void setup() {

//Your setup here:

strip_0.strip.begin();
}

void loop() {

//Your code here:

strips_loop();
}

void strips_loop() {
  if(strip0_loop0() & 0x01)
    strip_0.strip.show();
}

uint8_t strip0_loop0() {
  uint8_t ret = 0x00;
  switch(strip0loop0.currentChild) {
    case 0:
          ret = strip0_loop0_eff0();break;
  }
  if(ret & 0x02) {
    ret &= 0xfd;
    if(strip0loop0.currentChild + 1 >= strip0loop0.childs) {
      strip0loop0.currentChild = 0;
      if(++strip0loop0.currentTime >= strip0loop0.cycles) {strip0loop0.currentTime = 0; ret |= 0x02;}
    }
    else {
      strip0loop0.currentChild++;
    }
  };
  return ret;
}

uint8_t strip0_loop0_eff0() {
    // Strip ID: 0 - Effect: Move - LEDS: 20
    // Steps: 60 - Delay: 50
    // Colors: 0 ()
    // Options: toLeft=false, rotate=true,
  if(millis() - strip_0.effStart < 50 * (strip_0.effStep)) return 0x00;
  uint32_t c = strip_0.strip.getPixelColor(19);
  for(uint16_t j=20-1;j>0;j--)
    strip_0.strip.setPixelColor(j, strip_0.strip.getPixelColor(j-1));
  strip_0.strip.setPixelColor(0, c);
  if(strip_0.effStep >= 60) {strip_0.Reset(); return 0x03; }
  else strip_0.effStep++;
  return 0x01;
}




are they errors in the code or from the generator?

Do you get any error message during compiling or does it not work when you try to execute it?

You have just an effect, and this effect will move your leds. But since you never set a color on your leds, they will stay without color ever if you move them.

You have to put a blink, fade or rainbow effect before. Moving a black led, will ever show you something on the strip.

27

I'm either trying to get a Rainbow effect with only yellow and white.
Nothing seems to wrong with the generated code, no errors shown on Arduino. For the life of me I can't get the LEDs to light up.

kintoki.ino (2.65 KB)

28

SANTOURYUU_COS:
I'm either trying to get a Rainbow effect with only yellow and white.
Nothing seems to wrong with the generated code, no errors shown on Arduino. For the life of me I can't get the LEDs to light up.

It is hard to say what is wrong. If you can compile the code, the rainbow should work!

But the question is more:

  • are you using neopixels? WS2812b?
  • did you connected them to PIN 8?
  • do you have a led strip with 60 leds?
  • did you connected the ground of your led strip to your arduino?

I think it is more an issue with the circuit, read this wiki for more info: Arduino, it's simple · Adrianotiger/Neopixel-Effect-Generator Wiki · GitHub

By the way, today, after a great help, the UI changed completely:

1693×942 181 KB

29

Adriano!

What an utterly brilliant little utility you've created! I spent 2 mins last night popping in some values in the simulator on the GitHub repository, then easily two more hours experimenting with the code to see just what was possible. Great Job!!

However, the application I have in mind requires two chase effects (of different colours) which loop up and down (actually around, my project is a black disc hovering in front of a black wall so the LEDs backlight it) so it looks similar in effect to the image here: LED ring - Album on Imgur - those arcs of colour rotate around on the screen - so in effect would simply roll up and down a strip.

How 'easy' would it be to code two different coloured chase effects that are sort of tied together that bounce up and down a strip (and even roll over one end back to the opposite end to achieve a circular look?

Screenshot 2019-11-06 at 12.31.49.png

30

Thank you for trying the tool :smiley:

The best solution would be to add a "chase" effect. Since there is nothing like that for the moment. It would not be hard to add this as effect, and could be a good todo for the next release.

For now, you can for example set 60 LEDS and use only 40 or 60 of them with this code:

{"NeoPixelEffects": {
 "strips":[
   {
     "pin" : "9",
     "leds" : "60",
     "frequence" : "800",
     "type" : "NEO_GRB",
     "loop" : [
       {
         "type" : "Loop",
         "looptype" : "time",
         "loopcount" : "1",
         "loop" : [
         {
           "type" : "EffectRainbow",
           "steps" : "137",
           "delay" : "20",
           "colors" : [
              {
                "red" : "0",
                "green" : "0",
                "blue" : "0",
                "white" : "0"
              },
              {
                "red" : "255",
                "green" : "255",
                "blue" : "0",
                "white" : "0"
              },
              {
                "red" : "0",
                "green" : "0",
                "blue" : "0",
                "white" : "0"
              },
              {
                "red" : "0",
                "green" : "0",
                "blue" : "0",
                "white" : "0"
              },
              {
                "red" : "0",
                "green" : "0",
                "blue" : "0",
                "white" : "0"
              }
            ],
           "options" : [
              {
                "name" : "rainbowlen",
                "value" : "60"
              },
              {
                "name" : "toLeft",
                "value" : "false"
              }
            ]
         }
         ]
       },
       {
         "type" : "EffectMove",
         "steps" : "16",
         "delay" : "50",
         "colors" : [

          ],
         "options" : [
            {
              "name" : "toLeft",
              "value" : "false"
            },
            {
              "name" : "rotate",
              "value" : "false"
            }
          ]
       },
       {
         "type" : "EffectMove",
         "steps" : "38",
         "delay" : "50",
         "colors" : [

          ],
         "options" : [
            {
              "name" : "toLeft",
              "value" : "true"
            },
            {
              "name" : "rotate",
              "value" : "false"
            }
          ]
       }
     ]
   }
 ]
}
}

But it is more a hacks, than a good solution :slight_smile:

With a chase effect, you could also create animations like "K.I.T.T." car.

But at the end you want also create an animation with different colors, not just the same 2, right?

This tool can create only fixed animations, so they will never randomly change color or animation... Or better, not at the moment. Could be another todo :wink:

If I find some time, I will try to add the chase effect, ok?

31

I love the idea of this, as I can figure out patterns visually, and I can do a bit of C++, but don't know how to take my visual ideas and turn them into C++ code based effects.

I have some ideas for improvements, though. Would you prefer feature requests here on this forum, or as issues on the github repo?

32

Hi nice patterns also show up on FastLED
if yiou run thrue the CHSV pattern Full Hue colors by degree division

  // full DEG CHSV
  float colorstep = 360.0/PIXELS;
  for (int i=0 ; i<PIXELS;i++){
    {LED[i] = CHSV(i*colorstep,255,130);}
  }
  FastLED.show();
  FastLED.delay(MAINDELAY);
  for (int i=0 ; i<PIXELS;i++){
    {LED[i] = CHSV(i,255,130);}
  }
  FastLED.show();
  FastLED.delay(MAINDELAY);
  colorstep = 180.0/PIXELS;
  for (int i=0 ; i<PIXELS;i++){
    {LED[i] = CHSV(i*colorstep,255,130);}
  }
  FastLED.show();
  FastLED.delay(MAINDELAY);

looks like fcause also on a endless long strip
pat_ani.gif

pat_ani.gif

33

pyr0ball:
I love the idea of this, as I can figure out patterns visually, and I can do a bit of C++, but don't know how to take my visual ideas and turn them into C++ code based effects.

I have some ideas for improvements, though. Would you prefer feature requests here on this forum, or as issues on the github repo?

Hi Pyr0ball,
if it is a feature requests, maybe the best way is to open an issue on github. So the issue can stay open until it is solved :slight_smile:

34

Hey, this is really nice, I am going to try it right now.

35

Adriano, it is possible to make some Leds in the strip go off and another part on? I dont find how to do that, thanks

36

ChangchungLeds:
Adriano, it is possible to make some Leds in the strip go off and another part on? I dont find how to do that, thanks

The effects should be much more, for a nice tool. I know. You can try the blink effect with the option "blink every..." so only a part of the LEDS will blink.

37

Hi there, I was wondering if it possible to request some features?

I would love to use some neo pixels in my automotive tail light projects and your animations are great.

Is it possible for the following please:

Allow animations confined to just a "part" of the strip
Asign the arduino analoug inputs to activate certain animations?

Is it also posible for this to work on windows or is it a web interface only?

Thank you for creating and thank you for taking time to read this!

Craig.

38

Fade does not work.

Fade shows the start color until the end, then for one step the end color.
in the generated code the line:
e = (strip_0.effStep * 1) / 30000;
have to cast to float
e = (float)(strip_0.effStep * 1) / 30000;
then it works

see issue #10 on Git