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Struggling with my ...
 
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Struggling with my LED-Matrix (Trollo_meo)  

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 Hans
(@hans)
Prominent Member Admin
Joined: 7 years ago
Posts: 870
February 29, 2020 6:39 AM  

Moved to the forum, from this comment.

Original question:


 

Hey it’s me again

I’m struggling once again with my LED-Matrix….

I’ve made big changes to my source code…

1. I’m using different switches now

2. I’m having an active low circuit 

3. I kicked out some projects

Now I’m running in a new problem…

My project wasn’t working so I started with a program which was (it was the funmode)

The program uses the Neopixel Library.

I got everything to work and I wanted to slowly add the other programs.

With the Twinklerandom from this page I started to struggle…. (It’s the “Random Color Twinkle” Programm from this page)

The Twinklerandom was working well but the other wasn’t…

I found out that it was cuz one variable was too big…

It’s the NUM_LED’s variable that I use in the Twinklerandom function.

Now I’m having the problem that I can only run this program with 193 LED’s and not with the 340 that I have in my LED strip.

Am I missing an important point?

This isn’t my full code I was focussing on 2 Programs and add another one when these r working fine. And continue with that till I have all my projects in the programm.

 

Code:

//includes
#include <Adafruit_NeoPixel.h> //Funmode
#include "FastLED.h" //Aufblinken
//defines
#define PIN 6
#define DATA_PIN 6
#define NUM_LEDS 193
//Funktion-Initialisierung
void funmode();
//void TwinkleRandom(int, int, int, boolean);
//Eingangspins
int aufblinkeneinput = 11;
int funmodeinput = 9;
//andere
CRGB leds[NUM_LEDS];
Adafruit_NeoPixel strip = Adafruit_NeoPixel(340, PIN, NEO_GRB + NEO_KHZ800);
void setup() {
  strip.begin();
  strip.show();
  Serial.begin(9600);
  LEDS.addLeds<NEOPIXEL,DATA_PIN>(leds,NUM_LEDS);
  
  //Eingangspins als INPUT definieren
  pinMode(aufblinkeneinput, INPUT);
  pinMode(funmodeinput, INPUT);
}
void loop() {
  if(digitalRead(aufblinkeneinput) == LOW) {
    TwinkleRandom(1800,100,150,false);
  }
  if(digitalRead(funmodeinput) == LOW) {
    funmode();
  }

//Hauptfunktion im Loop
//1. Aufblinken
void TwinkleRandom(int Count, int SpeedDelay, int fadespeed, boolean OnlyOne) {
  setAll(0,0,0);
  for (int i=0; i<Count; i++) {
    fadeall(fadespeed);
    setPixel(random(NUM_LEDS),random(0,255),random(0,192),random(0,128));
    showStrip();
    delay(SpeedDelay);
    if(OnlyOne) { 
      setAll(0,0,0); 
    }
  }
// delay(SpeedDelay);
}
//3. Funmode
void funmode() {
    // Some example procedures showing how to display to the pixels:
  colorWipe(strip.Color(255, 0, 0), 50); // Red
  colorWipe(strip.Color(0, 255, 0), 50); // Green
  colorWipe(strip.Color(0, 0, 255), 50); // Blue
  // Send a theater pixel chase in...
  theaterChase(strip.Color(127, 127, 127), 50); // White
  theaterChase(strip.Color(127, 0, 0), 50); // Red
  theaterChase(strip.Color( 0, 0, 127), 50); // Blue
  rainbow(20);
  rainbowCycle(20);
  theaterChaseRainbow(50);
}



//Deklaration der Hauptfunktionen

//1. Aufblinken
void setPixel(int Pixel, byte red, byte green, byte blue) {
  leds[Pixel].r = red;
  leds[Pixel].g = green;
  leds[Pixel].b = blue;
}
void setAll(byte red, byte green, byte blue) {
  for(int i = 0; i < NUM_LEDS; i++ ) {
    setPixel(i, red, green, blue); 
  }
  showStrip();
}
void showStrip() {
  FastLED.show();
}
void fadeall(int scale) { for(int i = 0; i < NUM_LEDS; i++) { leds[i].nscale8(scale); } }

//3. Funmode
// Fill the dots one after the other with a color
void colorWipe(uint32_t c, uint8_t wait) {
  for(uint16_t i=0; i<strip.numPixels(); i++) {
      strip.setPixelColor(i, c);
      strip.show();
      delay(wait);
  }
}
void rainbow(uint8_t wait) {
  uint16_t i, j;
  for(j=0; j<256; j++) {
    for(i=0; i<strip.numPixels(); i++) {
      strip.setPixelColor(i, Wheel((i+j) & 255));
    }
    strip.show();
    delay(wait);
  }
}
// Slightly different, this makes the rainbow equally distributed throughout
void rainbowCycle(uint8_t wait) {
  uint16_t i, j;
  for(j=0; j<256*5; j++) { // 5 cycles of all colors on wheel
    for(i=0; i< strip.numPixels(); i++) {
      strip.setPixelColor(i, Wheel(((i * 256 / strip.numPixels()) + j) & 255));
    }
    strip.show();
    delay(wait);
  }
}
//Theatre-style crawling lights.
void theaterChase(uint32_t c, uint8_t wait) {
  for (int j=0; j<10; j++) { //do 10 cycles of chasing
    for (int q=0; q < 3; q++) {
      for (int i=0; i < strip.numPixels(); i=i+3) {
        strip.setPixelColor(i+q, c); //turn every third pixel on
      }
      strip.show();
      delay(wait);
      for (int i=0; i < strip.numPixels(); i=i+3) {
        strip.setPixelColor(i+q, 0); //turn every third pixel off
      }
    }
  }
}
//Theatre-style crawling lights with rainbow effect
void theaterChaseRainbow(uint8_t wait) {
  for (int j=0; j < 256; j++) { // cycle all 256 colors in the wheel
    for (int q=0; q < 3; q++) {
        for (int i=0; i < strip.numPixels(); i=i+3) {
          strip.setPixelColor(i+q, Wheel( (i+j) % 255)); //turn every third pixel on
        }
        strip.show();
        delay(wait);
        for (int i=0; i < strip.numPixels(); i=i+3) {
          strip.setPixelColor(i+q, 0); //turn every third pixel off
        }
    }
  }
}
// Input a value 0 to 255 to get a color value.
// The colours are a transition r - g - b - back to r.
uint32_t Wheel(byte WheelPos) {
  if(WheelPos < 85) {
   return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
  } else if(WheelPos < 170) {
   WheelPos -= 85;
   return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
  } else {
   WheelPos -= 170;
   return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
  }
}

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 Hans
(@hans)
Prominent Member Admin
Joined: 7 years ago
Posts: 870
February 29, 2020 7:02 AM  

So what I understand from your question is that this function works with 193 LEDs but not with 340 ...?

void TwinkleRandom(int Count, int SpeedDelay, int fadespeed, boolean OnlyOne) {
setAll(0,0,0);
for (int i=0; i<Count; i++) {
fadeall(fadespeed);
setPixel(random(NUM_LEDS),random(0,255),random(0,192),random(0,128));
showStrip();
delay(SpeedDelay);
if(OnlyOne) {
setAll(0,0,0);
}
}
// delay(SpeedDelay);
}

I'll just go through my usual thinking process here;

  1. Form what I could find in the Arduino reference (random()), it takes a "long" datatype, which is a 32bit number and has a range from -2,147,483,648 to 2,147,483,647. I'd say sufficient for your purposes. 😊 
  2. The function setPixel() takes and integer, which worse case would have a range of -32,768 to 32,767, still enough for 340 LEDs. 👍 
  3. NUM_LEDS is actually not a variable, it is a "define" which basically means that wherever you have "NUM_LEDS" in the code, the compiler will replace that text with the defined number (eg. 193 or 340) before it actually compiles the code. So it is not limited by anything. 👍 

While going through the code (with steps 1, 2, and 3) I did notice how the function setPixel was defined.
I think in your code, the setPixel function is using the code for the FastLED library and not for NeoPixel.

The function for NeoPixel should be:

void setPixel(int Pixel, byte red, byte green, byte blue) {
   strip.setPixelColor(Pixel, strip.Color(red, green, blue));
 }

Or maybe even better change all references to setPixel to setPixelColor.
For example:

void TwinkleRandom(int Count, int SpeedDelay, int fadespeed, boolean OnlyOne) {
setAll(0,0,0);
for (int i=0; i<Count; i++) {
fadeall(fadespeed);
setPixelColor(random(NUM_LEDS),random(0,255),random(0,192),random(0,128));
showStrip();
delay(SpeedDelay);
if(OnlyOne) {
setAll(0,0,0);
}
}
// delay(SpeedDelay);
}

Maybe this is the culprit?


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