Help with coding Fastled fire animation on connected strips (sort of a matrix?)

Projects Programming
1

I'm a beginner so please forgive my ignorance. I am trying to modify the fastled fire code to work on 5 strips of 12 LEDs that I have soldered together (see attached image). The original code works fine, but I do not want it to function as one strip, I want each strip to get the fire animation. I was inspired by this post; I do not have the android app, so I tried to use his example of defining both NUM_LEDS and NUM_STRIPS and changing the code throughout. I can't get it to work, and I get a lot of error messages (see below the code). I feel pretty dumb right now. Can anyone help me?

#include <FastLED.h>

#define LED_PIN 1
#define COLOR_ORDER GRB
#define CHIPSET     WS2812
#define NUM_LEDS 12
#define NUM_STRIPS 5
#define BRIGHTNESS  150
#define FRAMES_PER_SECOND 20

CRGB leds[NUM_STRIPS * NUM_LEDS];

CRGBPalette16 gPal;

void setup() {
  delay(3000); // sanity delay
  FastLED.addLeds<CHIPSET, LED_PIN, COLOR_ORDER>(leds, NUM_STRIPS * NUM_LEDS).setCorrection( TypicalLEDStrip );
  FastLED.setBrightness( BRIGHTNESS );
 
  gPal = CRGBPalette16( CRGB::Black, CRGB::Red, CRGB::Yellow, CRGB::White);
}

void loop() 
{

  Fire2012WithPalette(); 

  FastLED.show(); 
  FastLED.delay(1000 / FRAMES_PER_SECOND);
}
 

// COOLING: How much does the air cool as it rises?
// Less cooling = taller flames.  More cooling = shorter flames.
// Default 55, suggested range 20-100 
#define COOLING  55
 
// SPARKING: What chance (out of 255) is there that a new spark will be lit?
// Higher chance = more roaring fire.  Lower chance = more flickery fire.
// Default 120, suggested range 50-200.
#define SPARKING 50
 
void Fire2012WithPalette(int stripNo) {
  // Array of temperature readings at each simulation cell
  static byte heat[NUM_STRIPS][NUM_LEDS];
 
  // Step 1.  Cool down every cell a little
  for( int i = 0; i < NUM_LEDS; i++) {
    heat[i] = qsub8( heat[i],  random8(0, ((COOLING * 10) / NUM_LEDS) + 2));
  }
  
  // Step 2.  Heat from each cell drifts 'up' and diffuses a little
  for( int k= NUM_LEDS - 3; k > 0; k--) {
    heat[k] = (heat[k - 1] + heat[k - 2] + heat[k - 2] ) / 3;
  }
    
  // Step 3.  Randomly ignite new 'sparks' of heat near the bottom
  if( random8() < SPARKING ) {
    int y = random8(7);
    heat[y] = qadd8( heat[y], random8(160,255) );
  }
 
  // Step 4.  Map from heat cells to LED colors
  for( int j = 0; j < NUM_LEDS; j++) {
    // Scale the heat value from 0-255 down to 0-240
    // for best results with color palettes.
    byte colorindex = scale8( heat[j], 240);
    leds[j] = ColorFromPalette( gPal, colorindex);
  }
}

ERROR MESSAGES

/Users/marycollins/Documents/Arduino/fire_3/fire_3.ino: In function 'void loop()':
fire_3:79:23: error: too few arguments to function 'void Fire2012WithPalette(int)'
   Fire2012WithPalette(); // run simulation frame, using palette colors
                       ^
/Users/marycollins/Documents/Arduino/fire_3/fire_3.ino:123:6: note: declared here
 void Fire2012WithPalette(int stripNo) {
      ^
/Users/marycollins/Documents/Arduino/fire_3/fire_3.ino: In function 'void Fire2012WithPalette(int)':
fire_3:129:28: error: invalid conversion from 'byte* {aka unsigned char*}' to 'uint8_t {aka unsigned char}' [-fpermissive]
     heat[i] = qsub8( heat[i],  random8(0, ((COOLING * 10) / NUM_LEDS) + 2));
                            ^
In file included from /Users/marycollins/Documents/Arduino/libraries/FastLED/lib8tion.h:385:0,
                 from /Users/marycollins/Documents/Arduino/libraries/FastLED/pixeltypes.h:7,
                 from /Users/marycollins/Documents/Arduino/libraries/FastLED/controller.h:9,
                 from /Users/marycollins/Documents/Arduino/libraries/FastLED/FastLED.h:47,
                 from /Users/marycollins/Documents/Arduino/fire_3/fire_3.ino:1:
/Users/marycollins/Documents/Arduino/libraries/FastLED/lib8tion/math8.h:88:34: error:   initializing argument 1 of 'uint8_t qsub8(uint8_t, uint8_t)' [-fpermissive]
 LIB8STATIC_ALWAYS_INLINE uint8_t qsub8( uint8_t i, uint8_t j)
                                  ^
fire_3:129:13: error: incompatible types in assignment of 'uint8_t {aka unsigned char}' to 'byte [12] {aka unsigned char [12]}'
     heat[i] = qsub8( heat[i],  random8(0, ((COOLING * 10) / NUM_LEDS) + 2));
             ^
fire_3:134:40: error: invalid operands of types 'byte [12] {aka unsigned char [12]}' and 'byte [12] {aka unsigned char [12]}' to binary 'operator+'
     heat[k] = (heat[k - 1] + heat[k - 2] + heat[k - 2] ) / 3;
                                        ^
fire_3:140:28: error: invalid conversion from 'byte* {aka unsigned char*}' to 'uint8_t {aka unsigned char}' [-fpermissive]
     heat[y] = qadd8( heat[y], random8(160,255) );
                            ^
In file included from /Users/marycollins/Documents/Arduino/libraries/FastLED/lib8tion.h:385:0,
                 from /Users/marycollins/Documents/Arduino/libraries/FastLED/pixeltypes.h:7,
                 from /Users/marycollins/Documents/Arduino/libraries/FastLED/controller.h:9,
                 from /Users/marycollins/Documents/Arduino/libraries/FastLED/FastLED.h:47,
                 from /Users/marycollins/Documents/Arduino/fire_3/fire_3.ino:1:
/Users/marycollins/Documents/Arduino/libraries/FastLED/lib8tion/math8.h:23:34: error:   initializing argument 1 of 'uint8_t qadd8(uint8_t, uint8_t)' [-fpermissive]
 LIB8STATIC_ALWAYS_INLINE uint8_t qadd8( uint8_t i, uint8_t j)
                                  ^
fire_3:140:13: error: incompatible types in assignment of 'uint8_t {aka unsigned char}' to 'byte [12] {aka unsigned char [12]}'
     heat[y] = qadd8( heat[y], random8(160,255) );
             ^
fire_3:147:37: error: invalid conversion from 'byte* {aka unsigned char*}' to 'uint8_t {aka unsigned char}' [-fpermissive]
     byte colorindex = scale8( heat[j], 240);
                                     ^
In file included from /Users/marycollins/Documents/Arduino/libraries/FastLED/lib8tion/math8.h:4:0,
                 from /Users/marycollins/Documents/Arduino/libraries/FastLED/lib8tion.h:385,
                 from /Users/marycollins/Documents/Arduino/libraries/FastLED/pixeltypes.h:7,
                 from /Users/marycollins/Documents/Arduino/libraries/FastLED/controller.h:9,
                 from /Users/marycollins/Documents/Arduino/libraries/FastLED/FastLED.h:47,
                 from /Users/marycollins/Documents/Arduino/fire_3/fire_3.ino:1:
/Users/marycollins/Documents/Arduino/libraries/FastLED/lib8tion/scale8.h:20:34: error:   initializing argument 1 of 'uint8_t scale8(uint8_t, fract8)' [-fpermissive]
 LIB8STATIC_ALWAYS_INLINE uint8_t scale8( uint8_t i, fract8 scale)
                                  ^
Multiple libraries were found for "FastLED.h"
 Used: /Users/marycollins/Documents/Arduino/libraries/FastLED
exit status 1
too few arguments to function 'void Fire2012WithPalette(int)'

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

IMG_2798.jpg
IMG_2798.jpg3024×4032 1.35 MB

2

one of the errors is related to this

void Fire2012WithPalette(int stripNo) {
  // Array of temperature readings at each simulation cell
  static byte heat[NUM_STRIPS][NUM_LEDS];
 
  // Step 1.  Cool down every cell a little
  for( int i = 0; i < NUM_LEDS; i++) {
    heat[i] = qsub8( heat[i],  random8(0, ((COOLING * 10) / NUM_LEDS) + 2));
  }

you declare a 2 dimensional array for every strip, but then try to assign without the stripNo. i suggest

void Fire2012WithPalette(int stripNo) {
  // Array of temperature readings at each simulation cell
  static byte heat[NUM_STRIPS][NUM_LEDS];
 
  // Step 1.  Cool down every cell a little
  for( int i = 0; i < NUM_LEDS; i++) {
    heat[stripNo][i] = qsub8( heat[i],  random8(0, ((COOLING * 10) / NUM_LEDS) + 2));
  }

(for every assignment within that function)and as you want to do it for every strip you should call that function with that stripNo hereFire2012WithPalette(); maybe from a loop like

for (uint8_t strp=0; strp<NUM_STRIPS; strp++) {
   Fire2012WithPalette(strp);
}

I don't know if you code will work the way you intended to, but this should take care of your compile errors.