Segment clock with WS1812B diodes

1#include <FastLED.h>
2#include <DS3231.h>
3#include <Wire.h>
4
5#define  NUM_LEDS 30
6#define DATA_PIN 2
7
8CRGB leds[NUM_LEDS];
9DS3231 rtc;
10
11const  int TOTAL_SEGMENTS = 4; // Total amount of segments
12const int LEDS_PER_SEGMENT  = 14; // Amount of LEDs per segment
13const int DISPLAY_SEGMENT[] = {0, 14, 14  * 2 + 2, 14 * 3 + 2}; // LED starting position of each segment
14const int DISPLAY_NUMBER[][14]  = { // True: Lit, False:  Not lit
15  {true, true, false, false, true, true, true,  true, true, true, true, true, true, true}, // 0
16  {false, false, false, false,  false, false, false, false, true, true, true, true, false, false}, // 1
17  {true,  true, true, true, false, false, true, true, true, true, false, false, true, true},  // 2
18  {false, false, true, true, false, false, true, true, true, true, true,  true, true, true}, // 3
19  {false, false, true, true, true, true, false, false,  true, true, true, true, false, false}, // 4
20  {false, false, true, true, true,  true, true, true, false, false, true, true, true, true}, // 5
21  {true, true,  true, true, true, true, true, true, false, false, true, true, true, true}, // 6
22  {false, false, false, false, false, false, true, true, true, true, true, true,  false, false}, // 7
23  {true, true, true, true, true, true, true, true, true,  true, true, true, true, true}, // 8
24  {false, false, true, true, true, true,  true, true, true, true, true, true, true, true}, // 9
25};
26
27int red = 255;
28int  green = 0;
29int blue = 0;
30char currentFade = 'r';
31
32void setup() {
33  Serial.begin(9600);
34  Serial.println("Starting execution");
35  FastLED.addLeds<NEOPIXEL,  DATA_PIN>(leds, NUM_LEDS);
36  FastLED.setBrightness(40); // Lower brightness
37  
38  Wire.begin();
39
40  // The following lines can be uncommented to set  the date and time
41rtc.setHour(21);     // Set the hour to 15 (24hr format)
42rtc.setMinute(26);   // Set the minute to 12
43}
44
45void loop() {
46  bool h12, pm;
47  int  hour = rtc.getHour(h12, pm); // Get the hour
48  int minute = rtc.getMinute();  // Get the minute
49
50  int hourFirstDigit = hour / 10; // Take the first digit
51  int hourSecondDigit = hour % 10; // Take the second digit
52
53  int minuteFirstDigit  = minute / 10; // Take the first digit
54  int minuteSecondDigit = minute % 10;  // Take the second digit
55  
56  int totalDelay = 0;
57  while (totalDelay <  10000) { // 10 seconds
58    if (currentFade == 'r') { // If red is currently fading
59      red--;
60      green++;
61      currentFade = red <= 0 ? 'g' : 'r'; // Change  currentFade if necessary
62    } else if (currentFade == 'g') { // If green is  currently fading
63      green--;
64      blue++;
65      currentFade = green  <= 0 ? 'b' : 'g'; // Change currentFade if necessary
66    } else { // If blue  is currently fading
67      blue--;
68      red++;
69      currentFade = blue  <= 0 ? 'r' : 'b'; // Change currentFade if necessary
70    }
71    FastLED.clear();  // Clear the LEDs
72    displayNumber(3, hourFirstDigit);
73    displayNumber(2,  hourSecondDigit);
74    displayNumber(1, minuteFirstDigit);
75    displayNumber(0,  minuteSecondDigit);
76    leds[14 * 2].setRGB(red, green, blue); // Light the dots
77    leds[14 * 2 + 1].setRGB(red, green, blue);
78    FastLED.show(); // Show the  current LEDs
79    delay(10);
80    totalDelay += 10;
81  }
82}
83
84void  displayNumber(int segment, int number) {
85  for (int j = 0; j < LEDS_PER_SEGMENT;  j++) { // Loop over each LED of said segment
86    if (DISPLAY_NUMBER[number][j])  { // If this LED should be on
87      leds[DISPLAY_SEGMENT[segment] + j].setRGB(red,  green, blue); // Turn it on
88    }
89  }
90}
91