lapboard_fastled_esp32.ino

#define FASTLED_ESP32_I2S true
//#define FASTLED_ALLOW_INTERRUPTS 0
#define FASTLED_SHOW_CORE 0
#include "src/FASTLED/FastLED.h"
#define LED_PIN 13
#define N_LEDS 98
#define BRIGHTNESS 20 //brightness  (max 254) 
#define N_LEDS_SEGMENT 7
#define N_DISPLAYS 2
CRGB leds[N_LEDS];
static CRGB color = CRGB::White;
static CRGB colors[2] = {CRGB::White, CRGB::Red};


void setup() {
  FastLED.addLeds<WS2812B, LED_PIN, GRB>(leds, N_LEDS);
  FastLED.setBrightness(  BRIGHTNESS );
  delay(500); 
}

// segments start at 1
void setSegment(int segment, CRGB color) {
  for(int i = ((segment - 1) * N_LEDS_SEGMENT); i < (segment * N_LEDS_SEGMENT); i++){
    leds[i] = color;
  }
}

void setSegments(int segments[7], CRGB color){
  for(int i = 0; i < N_LEDS_SEGMENT; i++){
    if(segments[i] > 0){
      setSegment(segments[i], color);
    }
  }
}

// displays start at 0
// segments start at 1
void setNumber(int nDisplay, int number, CRGB color){
  int segmentOffset = nDisplay * 7;
  int number0[7] = {1 + segmentOffset,2 + segmentOffset,3 + segmentOffset,4 + segmentOffset,5 + segmentOffset,6 + segmentOffset,0};
  int number1[7] = {3 + segmentOffset,4 + segmentOffset,0,0,0,0,0};
  int number2[7] = {2 + segmentOffset,3 + segmentOffset,5 + segmentOffset,6 + segmentOffset,7 + segmentOffset,0,0};
  int number3[7] = {2 + segmentOffset,3 + segmentOffset,4 + segmentOffset,5 + segmentOffset,7 + segmentOffset,0,0};
  int number4[7] = {1 + segmentOffset,3 + segmentOffset,4 + segmentOffset,7 + segmentOffset,0,0,0};
  int number5[7] = {1 + segmentOffset,2 + segmentOffset,4 + segmentOffset,5 + segmentOffset,7 + segmentOffset,0,0};
  int number6[7] = {1 + segmentOffset,2 + segmentOffset,4 + segmentOffset,5 + segmentOffset,6 + segmentOffset,7 + segmentOffset,0};
  int number7[7] = {2 + segmentOffset,3 + segmentOffset,4 + segmentOffset,0,0,0,0};
  int number8[7] = {1 + segmentOffset,2 + segmentOffset,3 + segmentOffset,4 + segmentOffset,5 + segmentOffset,6 + segmentOffset,7 + segmentOffset};
  int number9[7] = {1 + segmentOffset,2 + segmentOffset,3 + segmentOffset,4 + segmentOffset,5 + segmentOffset,7 + segmentOffset,0};
  
  switch(number){
    case 0:
      setSegments(number0, color);
      break;
    case 1:
      setSegments(number1, color);
      break;
    case 2:
      setSegments(number2, color);
      break;
    case 3:
      setSegments(number3, color);
      break;
    case 4:
      setSegments(number4, color);
      break;
    case 5:
      setSegments(number5, color);
      break;
    case 6:
      setSegments(number6, color);
      break;
    case 7:
      setSegments(number7, color);
      break;
    case 8:
      setSegments(number8, color);
      break;
    case 9:
      setSegments(number9, color);
      break;
    default:
      break;
  }
}

byte countDigits(int num){
  byte count=0;
  while(num){
    num=num/10;
    count++;
  }
  return count;
}

byte getDigit(unsigned int number, int digit) {
    for (int i=0; i<digit-1; i++) { 
      number /= 10; 
    }
    return number % 10;
}

void showNumber(int number, CRGB color[], bool toRight) {
  FastLED.clear();
  int nDigits = countDigits(number);
  // minus 1 because displays start at 0
  int j = 1;
  for(int i = nDigits; i >= 0; i--){
    if(toRight && number < 10) {
      setNumber(i, getDigit(number, j++), color[i]);
    } else {
      setNumber(i - 1, getDigit(number, j++), color[i-1]);
    }
  }
  FastLED.show();
}

int noemer = 0;

void loop() { 
  delay(1000);
  showNumber(noemer, colors, true);
  noemer++;
}