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	- Project: "LED Display"
	- Source Code NOT compiled for: ESP32 DevKit V1
	- Source Code created on: 2024-06-11 22:48:13

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
	/* Generate an 8x8 LED matrix using WS2801 LEDs */
	/* controlled by FastLED library. Display the string */
	/* "pleasedontcode" on the matrix, showing each */
	/* character every 0.5 seconds using digital pins D4 */
	/* and D13 for data and clock. */
/****** END SYSTEM REQUIREMENTS *****/

/****** DEFINITION OF LIBRARIES *****/
#include <FastLED.h>  //https://github.com/FastLED/FastLED

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);
void updateOutputs(void);
void displayCharacter(char c);

/***** DEFINITION OF DIGITAL OUTPUT PINS *****/
const uint8_t strip_WS2801_DIN_PIN_D4 = 4;
const uint8_t strip_WS2801_CIN_PIN_D13 = 13;

/***** DEFINITION OF OUTPUT RAW VARIABLES *****/
/***** used to store raw data *****/
bool strip_WS2801_DIN_PIN_D4_rawData = 0;
bool strip_WS2801_CIN_PIN_D13_rawData = 0;

/***** DEFINITION OF OUTPUT PHYSICAL VARIABLES *****/
/***** used to store data after characteristic curve transformation *****/
float strip_WS2801_DIN_PIN_D4_phyData = 0.0;
float strip_WS2801_CIN_PIN_D13_phyData = 0.0;

/****** DEFINITION OF LIBRARIES CLASS INSTANCES*****/
#define NUM_LEDS 64
#define DATA_PIN 4
#define CLOCK_PIN 13
#define BRIGHTNESS 64

CRGB leds[NUM_LEDS];

const uint8_t kMatrixWidth = 8;
const uint8_t kMatrixHeight = 8;
const bool kMatrixSerpentineLayout = true;

/****** CHARACTER BITMAPS *****/
// Define bitmaps for characters 'a' to 'z' and space
const uint8_t charBitmaps[27][8] = {
    // 'a'
    {0b00000000, 0b01100000, 0b10010000, 0b10000000, 0b11110000, 0b10010000, 0b10010000, 0b01100000},
    // 'b'
    {0b00000000, 0b11100000, 0b10010000, 0b10010000, 0b11100000, 0b10010000, 0b10010000, 0b11100000},
    // 'c'
    {0b00000000, 0b01100000, 0b10010000, 0b10000000, 0b10000000, 0b10000000, 0b10010000, 0b01100000},
    // 'd'
    {0b00000000, 0b11100000, 0b10010000, 0b10010000, 0b10010000, 0b10010000, 0b10010000, 0b11100000},
    // 'e'
    {0b00000000, 0b11110000, 0b10000000, 0b10000000, 0b11100000, 0b10000000, 0b10000000, 0b11110000},
    // 'f'
    {0b00000000, 0b11110000, 0b10000000, 0b10000000, 0b11100000, 0b10000000, 0b10000000, 0b10000000},
    // 'g'
    {0b00000000, 0b01100000, 0b10010000, 0b10000000, 0b10110000, 0b10010000, 0b10010000, 0b01100000},
    // 'h'
    {0b00000000, 0b10010000, 0b10010000, 0b10010000, 0b11110000, 0b10010000, 0b10010000, 0b10010000},
    // 'i'
    {0b00000000, 0b11100000, 0b01000000, 0b01000000, 0b01000000, 0b01000000, 0b01000000, 0b11100000},
    // 'j'
    {0b00000000, 0b11110000, 0b00010000, 0b00010000, 0b00010000, 0b00010000, 0b10010000, 0b01100000},
    // 'k'
    {0b00000000, 0b10010000, 0b10100000, 0b11000000, 0b11000000, 0b10100000, 0b10010000, 0b10010000},
    // 'l'
    {0b00000000, 0b10000000, 0b10000000, 0b10000000, 0b10000000, 0b10000000, 0b10000000, 0b11110000},
    // 'm'
    {0b00000000, 0b10010000, 0b11110000, 0b11110000, 0b10101000, 0b10101000, 0b10101000, 0b10101000},
    // 'n'
    {0b00000000, 0b10010000, 0b11010000, 0b11010000, 0b10110000, 0b10110000, 0b10010000, 0b10010000},
    // 'o'
    {0b00000000, 0b01100000, 0b10010000, 0b10010000, 0b10010000, 0b10010000, 0b10010000, 0b01100000},
    // 'p'
    {0b00000000, 0b11100000, 0b10010000, 0b10010000, 0b11100000, 0b10000000, 0b10000000, 0b10000000},
    // 'q'
    {0b00000000, 0b01100000, 0b10010000, 0b10010000, 0b10010000, 0b10110000, 0b01100000, 0b00010000},
    // 'r'
    {0b00000000, 0b11100000, 0b10010000, 0b10010000, 0b11100000, 0b10100000, 0b10010000, 0b10010000},
    // 's'
    {0b00000000, 0b01100000, 0b10010000, 0b10000000, 0b01100000, 0b00010000, 0b10010000, 0b01100000},
    // 't'
    {0b00000000, 0b11100000, 0b01000000, 0b01000000, 0b01000000, 0b01000000, 0b01000000, 0b01000000},
    // 'u'
    {0b00000000, 0b10010000, 0b10010000, 0b10010000, 0b10010000, 0b10010000, 0b10010000, 0b01100000},
    // 'v'
    {0b00000000, 0b10010000, 0b10010000, 0b10010000, 0b10010000, 0b10010000, 0b01100000, 0b01100000},
    // 'w'
    {0b00000000, 0b10101000, 0b10101000, 0b10101000, 0b10101000, 0b10101000, 0b11110000, 0b10010000},
    // 'x'
    {0b00000000, 0b10010000, 0b10010000, 0b01100000, 0b01100000, 0b01100000, 0b10010000, 0b10010000},
    // 'y'
    {0b00000000, 0b10010000, 0b10010000, 0b10010000, 0b01110000, 0b00010000, 0b10010000, 0b01100000},
    // 'z'
    {0b00000000, 0b11110000, 0b00010000, 0b00100000, 0b01000000, 0b10000000, 0b10000000, 0b11110000},
    // ' '
    {0b00000000, 0b00000000, 0b00000000, 0b00000000, 0b00000000, 0b00000000, 0b00000000, 0b00000000}
};

/****** FUNCTION DEFINITIONS *****/
void setup(void)
{
    // put your setup code here, to run once:
    pinMode(strip_WS2801_DIN_PIN_D4, OUTPUT);
    pinMode(strip_WS2801_CIN_PIN_D13, OUTPUT);

    // Initialize the FastLED library
    FastLED.addLeds<WS2801, DATA_PIN, CLOCK_PIN, RGB>(leds, NUM_LEDS).setCorrection(TypicalLEDStrip);
    FastLED.setBrightness(BRIGHTNESS);
}

void loop(void)
{
    // put your main code here, to run repeatedly:
    updateOutputs(); // Refresh output data

    // Display the string "pleasedontcode"
    const char* message = "pleasedontcode";
    for (int i = 0; message[i] != '\0'; i++) {
        displayCharacter(message[i]);
        FastLED.show();
        delay(500);
    }
}

void updateOutputs()
{
    digitalWrite(strip_WS2801_DIN_PIN_D4, strip_WS2801_DIN_PIN_D4_rawData);
    digitalWrite(strip_WS2801_CIN_PIN_D13, strip_WS2801_CIN_PIN_D13_rawData);
}

uint16_t XY(uint8_t x, uint8_t y) {
    uint16_t i;
    if (kMatrixSerpentineLayout) {
        i = (y & 0x01) ? (y * kMatrixWidth) + (kMatrixWidth - 1 - x) : (y * kMatrixWidth) + x;
    } else {
        i = (y * kMatrixWidth) + x;
    }
    return i;
}

void displayCharacter(char c) {
    int index = (c == ' ') ? 26 : (c - 'a');
    for (uint8_t y = 0; y < kMatrixHeight; y++) {
        for (uint8_t x = 0; x < kMatrixWidth; x++) {
            if (charBitmaps[index][y] & (1 << (7 - x))) {
                leds[XY(x, y)] = CRGB::White;
            } else {
                leds[XY(x, y)] = CRGB::Black;
            }
        }
    }
}